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Pocket Physics is a physical construction set for the DS. Like in Crayon Physics, you draw objects which then become physical and interact with each other. It uses my DS port of the Box2D library by Erin Catto.

Get it from the project homepage

Feel free to leave any kind of comments here.

Edit: Pocket Physics will be open sourced! If you want to take a look at the source now already, just ask.

Here's a list of features I'm still planning to implement. Features that people suggested and that I think would be interesting are listed under "other". I will not implement them but I hope someone else wants to!

To do:
- changing physical shape attributes
- layers
- changing the gravity with the stylus
- skins
- xml documentation
- duplicating shapes (select objects in rectangle, then copy them)
- moving groups of shapes (in the same way described above)
- uploading to the web
- toggle motion card control on/off during playback
- motors

Maybe:
- rotating shapes
- grid that allows easier drawing
- ropes
- wrapping
- checkpoint button (makes the current positions and rotations of shapes the initial ones)
- sound
- camera pin
- zooming
- child mode (no controls, only move tool)
- folders
- objects leave traces (optional)
- slow motion/stepwise simulation
- colors
- configurable paper size
- elements (like pistons) controllable via buttons for making e.g. pinball games

Other:
- portals
- level system (like the star in Crayon Physics)
- straight line tool
- filled objects
- undo/redo
- snapping objects when moving them
- springs/balloons/anti-gravity fields/cats/ragdolls/bombs (a while object libraray like in "The incredible machine" would be cool!)
- fans that blow when you blow into the mic
- cannons that shoots objects in a certain direction
- breakable objects
- export to image sequence (for making videos)
- iPhysics compatibility
- collaboration using liblobby
- grouping/ungrouping of objects
- Rails
- Motion damping/enhacing areas

Known Bugs:
- simulation speed varies
- joints freak out if under heavy stress
- on some cards, the drawing sound keeps playing after the pen is lifted
- on supercard lite, saving is unreliable (due to the screenshot) use the nothumb version
- weird pin behavior when pinning things in pause mode
- pin centering does not exactly center the pins

Last edited by 0xtob on Sun Jan 10, 2010 4:45 pm; edited 31 times in total

thats looks awesome, crayon physics was great

edit: played it for a bit, and it runs beautifully, but, it would be better with a level editor that you could save to(and make challenges), however the screen space might be a little low for that

Realy great game! Would be good some kind of scrolling 'couse ds's screen is bit small. Yes, and i find one small bug. I try to draw 8, and it didn't fall or move :) but great game
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I usually just lurk here, but I had to log in and let you know I really like this program. Amazing for 2 weeks work IMO, and I'll definitely be watching for updates.

Great work 0xtob as usual. A beautiful porting of the 2d physics.
The possibles are great.

Wow, this is fantastic. I love these sort of games (e.g. where the player 'makes' the game).

Bugs:
1) When I'm designing a scene, I can only draw so many shapes before the program stops after releasing the stylus from drawing a shape. It carries on playing the drawing sound.

2) The rectangles seem to bounce around on their own. Not a major thing, I know, but one of mine fell over (on straight ground) and knocked over the other dominoes.
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Great, played for a bit, but have an issue:

I made a large static circle, and when I draw 1 (or more) small dynamic circles inside of it they immediatly take the shortest route out of it and only interact with the outside...is that supposed to happen?
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Great work !

As a old Incredible Machine fan I need to say: THANK YOU !

Some suggestions:

- include a free hand tool (the drawing thing you included is just a line drawer it seems)

- include level saving / loading support

- perhaps include more types of objects, like bouncing lines and stuff like this so we can do really complicated stuff ?

Bugs I came over:

- sometimes if you have much fun drawing stuff you will come over problems like this: you draw VERY much circles and stuff, and then you press play and the thing locks up

I guess this may be a DS limitation, right ?

- if you draw than it can happen that the thing locks up without a warning (drawing sound continues to play, though)

Thanks again for this wonderful Christmas Present ! I really like your work.

More bugs: If you draw a solid half-pipe (A double layered "U") and a dynamic Pac-man shape, the Pac-man falls straight through the platform. Also, the game freezes up even if the world is consistently deleted.

Also, could you use the song used in Crayon Physics? It is released under the creative commons license.

Also, Sleep Mode.

Anyway, scrolling would make this even better! Keep up the good work!

Hey, thanks a bunch for all the feedback :)

I'm glad that many people enjoying this. I apologize for the bugs, but hey it's a first release.

Here's a list of issues known so far:

- Shapes with self-intersection are not simulated (no clipping, no movement)
- They also cannot be deleted with the delete tool
- The delete tool sometimes deletes the wrong object (problem with overlapping bounding boxes)
- Random freezes

fischju wrote:

I made a large static circle, and when I draw 1 (or more) small dynamic circles inside of it they immediatly take the shortest route out of it and only interact with the outside...is that supposed to happen?

You have to think of the objects as solid (although only the outlines are drawn), so this is normal and intended.

Markzilla wrote:

Also, could you use the song used in Crayon Physics? It is released under the creative commons license.

Adding mp3 music would either blow up the file size immensely or require the use of DLDI, which would mean extra hassle for the user. But if someone wants to compose some TIM-style XM music, that would be very much welcome :)

Features I'd like to add are:

- Scrolling
- "Pins" for fixing objects to the background (useful for making seesaws)

However, this is just a small toy and I want to keep it that way. (You know I still have this tracker, which is crying for an update :)
If someone wants to pick this up to make it bigger and better, or even make a full game out of it, just drop me a message!
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Ah. Well, could you add something to the top screen? It seems lonely and dejected the way things are.

suggestions for the scrolling and top screen: why not put a overview on the top screen and scroll on the bottom one?

i haven't tried this yet, but it looks great. keep up the good work.
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:/ what're you lookin' at?

Can't seem to create wheels ...

__HBK__ wrote:

suggestions for the scrolling and top screen: why not put a overview on the top screen and scroll on the bottom one?
.

I like this suggestion.

0xtob: if you could add the features you said, and a save system this would be enough for us ! Nothing more would be needed.

Thanks for your awesome work, and:

Merry Christmas !

All i can say is this is great though as some other people said the drawing area need to be a wee bit bigger thats about it oh and saving you that would be good to its mad that you done this its well fun thank you.

and also a grid that you can turn on and off so that we cam make building blocks that are the same size and mibby some joints so that we can make little people and catapult them up into the air lol:)

ps just notist that the game doesnt have sleep mode :(

oh thnks ! it rlz !!!!
i see that project in all the DS news webs i usually look,

by the way, you are the guy who made nitro tracker ?

buttons and window style is 100% the same one.

as you know it freeze too much, dosn't matter in a first relase =)

tiny circles don't look very well

can you add an option to do free lines in the static red objects? if i do a big semi circle, the first and the end point become joined by a stright line themself,

thnks for read and sorry for my bad english level,

OK, 0xtob:

I found the song used in Crayon Physics and uploaded it here in mp3, and here in raw.

(If I knew a way on how to get it into xm format/style then I would do that, but sadly I'm unable to do that, even with the fabulous Nitrotracker...)

I REALLY hope that you will implement pins (for seesaws like you said), a scrolling system, and a level saving/loading feature to make this baby complete.

Thanks again:

pas

could be possible to make the paper bigger?

spalnndsstest: Not in this release, so let's hope that t0bx will perhaps upgrade this nifity tool/toy/physic software with some of our suggestions we already wrote down.

How about adding a "grid" / "snap-to-grid" feature for use when creating squares/rectangles etc to make them easier to line up in the future? Perhaps with a variable sized grid. Or a "rotate" feature for a selected piece and things like that?
Playing around with the Hammer editor for HL2 it seemed like a feature worth including in Pocket Physics. Make it easier to stack up complex structures.

OK,
Requests:
- bigger paper (scroll support, 4x the size of the touchscreen would totally reach)
- on/off switchable grid that allows easier drawing
- pins (for doing pendulums, seesaws, etc.)
- Savesystem (loading/saving of levels)
- addition of a level system (like the star in Crayon Physics)
- the background music used in Crayon Physics [mp3][raw].
- freehand tool for allowing random shaped figures (that don't have to be closed [if possible])
- Have a option to use the Stylus to move objects created. This was part of flash physics which I really liked
- More shape tools such as a square and triangle
- Duplicate object option so you could copy a object and paste it several times. This could be used to create a box wall and then run a ball into it and watch the boxes fly.
- a straight line tool
- a mode that makes objects filled
see here for better explanation:

devil_spawn wrote:

when you draw a circle or square in pocket physics, the object is 'full' and therefore does not allow anything inside it - it just shoots out, however if you do the same thing with seperate lines, it works fine, and the resulting square is 'hollow'

-----------------------------------------------------------------------------------

Bugs:
- random crashing over some time (too much objects used ?)

Last edited by pas on Sun Jan 06, 2008 12:01 am; edited 4 times in total

I found this game when looking into Flash Physics and I must say this is a great project you have going. I will be sure to keep an eye out on the progress.

0xtob all you software plainly rock. got an iphone yet? :P

hollow shapes would be a good feature

I love the idea of being able to set a fulcrum to make pendulums or see-saws out of the moving objects. I also think a rubber band tool would be really cool; just a straight line with two anchored points at each side that would stretch when something fell onto it and then snap back sending the object flying out.

With some more tools like that and larger playfields and the ability to save a created environment to show others or share on the Internet, this would definitely be one of the coolest homebrews ever. I haven't even tried out the Motion Card support yet, but that sounds really cool, too.

What a great game.

EDIT: Ah, I just noticed that you released a new version today that has the "pin" tool for creating see-saws and wheels and stuff. Excellent.

...word is bondage...

Oh I love the pins! As I type this I'm trying to prove that the over balanced wheel isn't fundamentally flawed in every way. So far not good.

I have an unoriginal idea, blame it on a recent Portal addiction. How bout adding portals that teleport objects from one point of the screen to another perhaps preserving velocity. It could make for some interesting endless animations.

AWESOME ! I love the pins, even better than I wanted them ^^.

Here is a updated list if you want to implement other stuff, I bolded the stuff that is really important to us (I think you guys agree with me ?)

Requests:
- bigger paper (scroll support, 4x the size of the touchscreen would totally reach)
- on/off switchable grid that allows easier drawing
- Portals (See the Portal game for explanation)
- Savesystem (loading/saving of levels)
- addition of a level system (like the star in Crayon Physics)
- the background music used in Crayon Physics [mp3][raw].
- freehand tool for allowing random shaped figures (that don't have to be closed [if possible])
- Have a option to use the Stylus to move objects created.
- More shape tools such as a square and triangle
- Duplicate object option so you could copy a object and paste it several times. This could be used to create a box wall and then run a ball into it and watch the boxes fly.
- a straight line tool
- a mode that makes objects filled
see here for better explanation:

devil_spawn wrote:

when you draw a circle or square in pocket physics, the object is 'full' and therefore does not allow anything inside it - it just shoots out, however if you do the same thing with seperate lines, it works fine, and the resulting square is 'hollow'

-----------------------------------------------------------------------------------

Bugs:

-

Fixed Bugs:

- if you place a moveable object in a fixed the movable object behaves strange - works much better, the movable objects now just move out (like they should ?)

- random crashing when drawing much stuff / drawing over the same spot for a long time - seems to work MUCH MORE STABLE now !

- crashing if too much stuff is going on and you continue drawing
- better than before

Hey!

As you probably noticed, version 0.2 is out!

The main addition are pins that you can use to pin objects to the background or to each other (see the screenshots on the homepage for example uses). Also I tried to eliminate crashes, which are mostly related to integer overflows in my ported physics library. I think the amount of crashes has reduced, but it might just be me.

spalnndsstest wrote:

can you add an option to do free lines in the static red objects? if i do a big semi circle, the first and the end point become joined by a stright line themself

Good idea, since this is confusing people a lot and often causes self-intersecting objects which are not treated correctly in the convex decomposition code.

automat wrote:

0xtob all you software plainly rock. got an iphone yet? :P

Incidentally I don't. Wanna buy me one? :)

Devil_Spawn wrote:

hollow shapes would be a good feature

Hmm, what would they be good for?

Jim e wrote:

Oh I love the pins! As I type this I'm trying to prove that the over balanced wheel isn't fundamentally flawed in every way. So far not good.

It's actually possible to create perpetuum mobiles since air resistance is not simulated. Just imagine the objects are on a strange paper planet without atmosphere :)

Jim e wrote:

I have an unoriginal idea, blame it on a recent Portal addiction. How bout adding portals that teleport objects from one point of the screen to another perhaps preserving velocity. It could make for some interesting endless animations.

I actually thought about this! But then again, people would be disappointed to find out I was lying about the cake.

Thanks to everyone who had ideas for new features and thanks to pas for collecting them! As I said earlier I don't want to work on this project very long (I hope someone is interested in picking it up later). But since the resonance is quite positive (even girls enjoy it!) I might extend my TODO list a little. So I'll just take your list and pick the ideas I like:

TODO:
- bigger paper (scroll support, 4x the size of the touchscreen would totally reach)
- loading/saving of levels
- non-closed shapes
- moving shapes with the stylus
- Rubber shapes
- Maybe: Duplicating shapes
- Maybe: on/off switchable grid that allows easier drawing
- Maybe: Export to image sequence (for making videos)
- Maybe, but probably not: Portals

Thanks again for your ideas! Feel free to suggest more, but be aware that I'm picky :)
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Last edited by 0xtob on Wed Jan 09, 2008 2:09 am; edited 3 times in total

Portals, ey? Seems like there's more people with the Orange Box than I thought :P

Stupidest request:
invisible objects: you can see them when stop, but you can't when played! :P

love what you've done so far 0xtob, great work! hours of play.
as u have decided to do scroll support, this might be a bit awkward to use on its own depending on how it is done; if only scrolling is allowed, viewing everything at the same time might be difficult/impossible. so a (maybe) easy solution would be enabling the top screen to display a zoomed out view of the "paper"?

lolmasta wrote:

Portals, ey? Seems like there's more people with the Orange Box than I thought :P

Stupidest request:
invisible objects: you can see them when stop, but you can't when played! :P

reminds me of that: I connected to objects together, and then I cut the line (but the pins remained), guess what happened ? the objects still where connected even though the weren't (strange, huh ? )

i have just realised that each time i run a simulation, its not always the same result (even though its the same "scene"), pretty much the same result, but slight differences. why is this? shouldnt it run exactly the same each time i press play?

I'm planning to use the top screen as an overview and the bottom screen for the zoomed-in view. I'm also wondering about the nondeterminism of the simulation. Simulating with a fixed timestep made simulation somewhat less random, but it's still not completely deterministic.
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You could also use the top screen as part of the whole paper, say a quarter. Then you can move around the paper so you are able to draw on that portion.

Then when you hit play you could have a option to follow a specific object or move around the paper to watch the action.

This would make is so you will have a bigger field of view of the paper.

EDIT:

I was not sure if my explanation was clear so here is a picture of what I mean.
http://img299.imageshack.us/img299/6899/nintendodsfg4.jpg

the lag of speed when there are lots of objects in screen

is becouse of only 4mb ram

so make a option that uses the ram expansion
or a option that uses free space on flashcards

and objects where a line cross a orther line freeze
is this good spelling? XD

edit:
last thing :p

make a guy that can walk with the cursor keys
aim with the touchscreen
and give him grenades guns and stuff
then u can build a castle and blow it up :D

sllide wrote:

the lag of speed when there are lots of objects in screen

is becouse of only 4mb ram

so make a option that uses the ram expansion
or a option that uses free space on flashcards

and objects where a line cross a orther line freeze
is this good spelling? XD

edit:
last thing :p

make a guy that can walk with the cursor keys
aim with the touchscreen
and give him grenades guns and stuff
then u can build a castle and blow it up :D

hmm.. expoding moving things ? that explode when they touch something and force everything away ? sounds good, but I guess it 'd be the best to first let him finish what he wrote down up there and THEN ask for other stuff.

Oh... and about that Ram expansion... I don't think that'll help much anyway, so 4 MB is max and it is fine for pocket physiks anyways (exept you want to have 100 objects on screen...

Since this is inspired by Crayon Physics shouldnt there be a starting ball and star to collect? Since you will be adding support for saving and loading games this feature would be great so everyone could share levels.

Wow, this is so much fun to play with! Great work so far, and I'm looking forward to the next version.

I love that it has motion card/pak support - thanks very much for that.

Here's an idea:
Allow customization of parameters for every shape (density, friction, elasticity, etc.). You could touch a "customize" button, then touch the shape and a menu with some sliders would come up to allow you to change from defaults.

sllide wrote:

the lag of speed when there are lots of objects in screen

is becouse of only 4mb ram

so make a option that uses the ram expansion
or a option that uses free space on flashcards

No... actually ram is the least of his problems, the main thing here when dealing with the complex calculations required for physics simulation, is processing power, which the DS is severely lacking, so using external RAM will be pretty much worthless.

sllide wrote:

make a guy that can walk with the cursor keys
aim with the touchscreen
and give him grenades guns and stuff
then u can build a castle and blow it up :D

I won't even comment on that....

hmmm...yeah that grenade thing is basically a completely different game.

How bout something that accelerates objects passing though, like those speed up arrows in racing games.

Or just about anything to satisfy my rube goldberg machine fetish. Springs, tethers, canons, Mentos and Pepsi, anything really.

While I love pocket physics I'm kinda wonder how the box2d lib would stand up in a high speed game, even if used sparingly. Does it have support for simpler grid aligned based map collisions? Sorry I haven't actually checked the libs source out yet. But it's some I'd like wrestle with later on.

Is there someone who knows how to make a Perpetuum Mobile in PP ?

Ferrie wrote:

Is there someone who knows how to make a Perpetuum Mobile in PP ?

uhm this game uses similar physiks to the real world so it isn't possible, except you want to show me to make on in the real world, good luck proving that one ^^.

Quote:

Is there someone who knows how to make a Perpetuum Mobile in PP ?

i dunno if this counts, but if u make a cross with a (ever so slightly) off centre pin, it will spin continuously. if unsuccessful on the first go, keep trying, it definatly can be done. ive done it numerous times to test this out.

I know it is based on real life physics (although it would be cool to change the gravity to another number than earth's 0.9) but what i also noticed was that sometimes (like with the cross example) things keep moving for a long time... That's why i asked, because maybe someone allready build something that kept going :) It would be cool to try and see how long it went on-and-on-and-on...

Pocket Physics is great! Thank you for creating (and updating) it!

It is getting closer to Crayon Physics Deluxe. Here some levels I created trying to copy of the ones from the video of Crayon Physics Deluxe.

http://img260.imageshack.us/img260/5325/image1ar2.jpg
http://img260.imageshack.us/img260/4396/image2ww0.jpg

Here is some ragdoll action :D

http://www.youtube.com/watch?v=5H-xPHFhmNs

Rocky5 wrote:

Here is some ragdoll action :D

http://www.youtube.com/watch?v=5H-xPHFhmNs

The last one really deserves an Oscar! Great work!

Thank you this is a great game i love it only problem is no saving :( then i could share or even enhance the ones i alread made rather than having to redo them all though on the up side the pins are great as you can see in the video you can have some fun with them :D

these are some stuff i think would make it even better

1. Saving and loading
2. Grid - for lining up stacks of objects makes it alot easier
3. Undo and redo function as i have deleted some stuff i dint want to
4. The area that you can work with make it a little bigger doesnt need to be huge but a little bigger would be nice.
5. An option to toggle the pin sprite as this does rune the videos :(
6. A snap tool for snaping object together but when you play back the objects explode this would be great as making breakable objects is a pain

all these and i would be very happy or any enhances i will still be happy :D

Update to the list (I made the new one's italic so you can easily see them):
+
Please, I think 0xtob is pleased with our ideas, but I guess having a clean thread with Ideas that DON'T REPEAT over and over again would be good, so why not take the time and read this request / bug list before posting ? (Even posting could be prevented, you would have just to send me a pm and I'll include it in the list if it isn't already)

Requests:
- bigger paper (scroll support, 4x the size of the touchscreen would totally reach)
- on/off switchable grid that allows easier drawing
- Savesystem (loading/saving of levels)
- addition of a level system (like the star in Crayon Physics)
- the background music used in Crayon Physics [mp3][raw].
- freehand tool for allowing random shaped figures (that don't have to be closed [if possible])
- Have a option to use the Stylus to move objects created. This was part of flash physics which I really liked
- More shape tools such as a square and triangle
- Duplicate object option so you could copy a object and paste it several times. This could be used to create a box wall and then run a ball into it and watch the boxes fly.
- a straight line tool
- a mode that makes objects filled
see here for better explanation:

devil_spawn wrote:

when you draw a circle or square in pocket physics, the object is 'full' and therefore does not allow anything inside it - it just shoots out, however if you do the same thing with seperate lines, it works fine, and the resulting square is 'hollow'

- gravity change (moon and zero gravity ? Or even a scala with - and + ?)
- object attribut change (making them bouncy, breaking on touch with other objects, self moving, woody, stony or anything else would be cool, but I guess to hard to include ?)
- undo redo (I think 10 levels would reach completly, but I also think this one would be quite impossible except if you could use a file on the card for this)
- A option to toggel the pin so you don't have to delete the whole object to move/ change it
- A snap tool for snaping object together but when you play back the objects explode this would be great as making breakable objects is a pain

-----------------------------------------------------------------------------------

Bugs:
- random crashing over some time (too much objects used ?)

I made the new one's bold so you can easily see them
_________________
Starcraft DS ?

Last edited by pas on Sun Jan 06, 2008 4:58 pm; edited 3 times in total

I know there's a lot of messages on this thread, but I really want to say thank you to you 0xtob and every homebrew developer for putting time and effort into fun and entertaining pieces of software. This app is already some of the best I've ever seen on the DS, and while I know this is intended to be a toy, with a few upgrades it could be even more incredible.

I also know that there's tons of messages on here that talk about feature requests and bugs, but I welcome the idea of panning/scrolling and save support. A slight speed upgrade when playing with lots of shapes would help considerably, too. Thanks again for developing this!

How about a hand tool? Something that lets you grab an object and move it around whether its in play or pause mode. I'm thinking something like putting a pin on an object, and having the object move with the pin, That would allow you to twist and turn it or hit against another object like a wrecking ball. Or if you grab the background, then just pan over the paper.

I still can't get a useful amount of work from just gravity. Even pendulums seem to loose some energy. Friction? Loss of precision? Funky collision?

0xtob wrote:

Devil_Spawn wrote:

hollow shapes would be a good feature

Hmm, what would they be good for?

mostly just time saving, it would allow you to draw a box around the entire area instead of 4 lines, or drawing a curved shape in the freehand tool and allowing things to roll inside it easily

sllide wrote:

make a guy that can walk with the cursor keys
aim with the touchscreen
and give him grenades guns and stuff
then u can build a castle and blow it up :D

OMG this MUST be done!

maiby this give some ideas:

http://youtube.com/watch?v=1KiQ7sNJ94g
http://youtube.com/watch?v=6h48TBVgGy8&feature=related
http://supa-monky.deviantart.com/art/The-Physics-Simulator-56523244

Update to the list (I made the new one's italic so you can easily see them)[Just PM me for further additions]:

Requests:
- bigger paper (scroll support, 4x the size of the touchscreen would totally reach)
- on/off switchable grid that allows easier drawing
- Savesystem (loading/saving of levels)
- addition of a level system (like the star in Crayon Physics)
- the background music used in Crayon Physics [mp3][raw].
- freehand tool for allowing random shaped figures (that don't have to be closed [if possible])
- Have a option to use the Stylus to move objects created. This was part of flash physics which I really liked
- More shape tools such as a square and triangle
- Duplicate object option so you could copy a object and paste it several times. This could be used to create a box wall and then run a ball into it and watch the boxes fly.
- a straight line tool
- a mode that makes objects filled
see here for better explanation:

devil_spawn wrote:

when you draw a circle or square in pocket physics, the object is 'full' and therefore does not allow anything inside it - it just shoots out, however if you do the same thing with seperate lines, it works fine, and the resulting square is 'hollow'

- gravity change (moon and zero gravity ? Or even a scala with - and + ?)
- object attribut change (making them bouncy, breaking on touch with other objects, self moving, woody, stony or anything else would be cool, but I guess to hard to include ?)
- undo redo (I think 10 levels would reach completly, but I also think this one would be quite impossible except if you could use a file on the card for this)
- A option to toggel the pin so you don't have to delete the whole object to move/ change it
- A snap tool for snaping object together but when you play back the objects explode this would be great as making breakable objects is a pain
- a button which will allow you to use some sort of Auto center Pin, which automaticly snaps to the direct center of any shape (or at least the default shapes like rectangle circle etc.)
(NO MORE OFF-BALANCED WHEELS!)
- rope.
- zoomable bottom screen, not just a (always) zoomed in view.
-----------------------------------------------------------------------------------

Bugs:
- random crashing over some time (too much objects used ?)

- when there is nothing on the screen and play is pressed, it crashes.

- if a pin is put staright into a RED (unmovable) shape, it crashes.
_________________
Starcraft DS ?

The addition of pins absolutely shot the creativity factor into hyperspace!
Your first release had me hooked but this is insane.

Thank you so much for this as it has been eating up all of my idle time. I'll even sit there when I can't play and formulate plans to try the next time I can.

While we wait for the next version, i've discovered a good way to introduce kinetic elasticity is to double pin the piece you want to act as a spring.

Here are a couple interesting results that have amused me.

http://www.youtube.com/watch?v=ExcJimnfOlo
Berzerk Bot

http://www.youtube.com/watch?v=N_j9y_fCDNM
Retarded Catapult

All of the requests are excellent suggestions, Brush thickness control would be a nice feature. However, I suppose with an expanded canvas/zoom feature that would be a negligible addition.

If it's at all possible, an expanded ram via slot 2 feature would be ultimate. I suppose you might need it for some of the other features anyway huh?

Love your brew dude, please.. keep it up.

Loving it :)

I think I found a bug: It freezes if you press the play button while nothing has been drawn on the screen.

Ok, here's a glitch I found that makes my kinetic hyper springs transport things into some alternate crayola dimension.

http://www.youtube.com/watch?v=sYaZy-z9rsc
Pocket Physics Freakout

It would be less likely to freakout if I deleted or changed some of the secondary elements as seen below with the same arm and a different target...

http://www.youtube.com/watch?v=A4KdCfsiQfY
Decapitation Via Poor Depth Perception

I suppose when elements are forced to intersect without allowing them force themselves apart some sort of endless loop is pushing the gravity out of whack. Kind of like a virtual blackhole of sorts...

maybe self moving objects can be done after all ^^ ? Cool vids :)
_________________
Starcraft DS ?

Ok found to major bugs :(

1. If you create a red object and try to attach a pin to it the ds crashes :(

2. If you draw with the pen tool say you scribble doesn't become a solid object others pass straight through and also if its blue same thing just floats there.

here is a short video of the two bugs. YouTube Video

wow gundark, impressive vids.

can't believe you got it to do something so awesome.

Hi i have some ideas for this fantastic app (you rock, 0xtob!!!!!:)

-Rope tool
-Spring Tool
-that portal idea is great but it would be very, very hard to create imo (i am programing in GM)
-Breakable objects!!!!!! for example you'll do a "Window (s :))" and catapult a ball into it. And the window will be smashed to small moving things (to blue objects)
-Hand tool - you could "kick" objects with it, you can pick up object with it

Bye!
sry for my bad english im not eng :)
_________________
Red dwarf and Futurama Fan!!!!
DS+M3Real owner!!!
Homo sapiens otakus nipponus :)

woodbin wrote:

Hi i have some ideas for this fantastic app (you rock, 0xtob!!!!!:)

-Rope tool
-Spring Tool
-that portal idea is great but it would be very, very hard to create imo (i am programing in GM)
-Breakable objects!!!!!! for example you'll do a "Window (s :))" and catapult a ball into it. And the window will be smashed to small moving things (to blue objects)
-Hand tool - you could "kick" objects with it, you can pick up object with it

Bye!
sry for my bad english im not eng :)

The portal tool kinda depends on what type of portal it would be. If it was just instantaneously transporting(more like a teleporter) it would be fairly trivial, just translating the coordinates and setting some flags about its status. However if mimicked like the game portal, where an object could peak through...well that raises a bunch of complications. I doubt that this could handle such complex collisions when theres already trouble with objects overlapping. I don't even want to know what would happen if an object would collide with itself. :)

Heres a dumb idea, a balloon! Pulls up with a certain amount of force. Possible poppable.

Excellent homebrew! Thanks a lot, love it.

I know there are a lot of suggestions, and many of them are probably better than mine, but I can't keep quiet. My thoughts:

It seems like objects are alive even when they've fallen off the screen. If I create a lot of balls that all fall off the screen, the simulation eventually slows down. They can't influence anything and I can't see them, might as well delete them. If I'm right that is, maybe you're already doing this and the slowdown is from something else :)

Add impulse force. When no tool is selected, a click with the stylus on an object could add an impulse force to the closest edge, parallell to the normal of that edge. The force could be proportional to pressure, but that might require a calibration mode aswell like in Colors!.

Please inform me, 0xtob if this list grows to big to handle, ok ?

Update to the list (I made the new one's italic so you can easily see them)[Just PM me for further additions]:

Requests:
- bigger paper (scroll support, 4x the size of the touchscreen would totally reach)
- on/off switchable grid that allows easier drawing
- Savesystem (loading/saving of levels)
- addition of a level system (like the star in Crayon Physics)
- the background music used in Crayon Physics [mp3][raw].
- freehand tool for allowing random shaped figures (that don't have to be closed [if possible])
- Have a option to use the Stylus to move objects created. This was part of flash physics which I really liked
- More shape tools such as a square and triangle
- Duplicate object option so you could copy a object and paste it several times. This could be used to create a box wall and then run a ball into it and watch the boxes fly.
- a straight line tool
- a mode that makes objects filled
see here for better explanation:

devil_spawn wrote:

when you draw a circle or square in pocket physics, the object is 'full' and therefore does not allow anything inside it - it just shoots out, however if you do the same thing with seperate lines, it works fine, and the resulting square is 'hollow'

- gravity change (moon and zero gravity ? Or even a scala with - and + ?)
- object attribut change (making them bouncy, breaking on touch with other objects, self moving, woody, stony or anything else would be cool, but I guess to hard to include ?)
- undo redo (I think 10 levels would reach completly, but I also think this one would be quite impossible except if you could use a file on the card for this)
- A option to toggel the pin so you don't have to delete the whole object to move/ change it
- A snap tool for snaping object together but when you play back the objects explode this would be great as making breakable objects is a pain
- a button which will allow you to use some sort of Auto center Pin, which automaticly snaps to the direct center of any shape (or at least the default shapes like rectangle circle etc.)
(NO MORE OFF-BALANCED WHEELS!)
- rope.
- zoomable bottom screen, not just a (always) zoomed in view.

-Spring Tool
-Breakable objects!!!!!! for example you'll do a "Window (s :))" and catapult a ball into it. And the window will be smashed to small moving things (to blue objects)
-Hand tool - you could "kick" objects with it, you can pick up object with it
-----------------------------------------------------------------------------------

Bugs:
- random crashing over some time (too much objects used ?)

- when there is nothing on the screen and play is pressed, it crashes.

- if a pin is put staright into a RED (unmovable) shape, it crashes.
_________________
Starcraft DS ?

sekazi wrote:

You could also use the top screen as part of the whole paper, say a quarter. Then you can move around the paper so you are able to draw on that portion.

That would also be a possibility for having a larger playing area. I'll think about it.

sllide wrote:

the lag of speed when there are lots of objects in screen

is becouse of only 4mb ram

so make a option that uses the ram expansion
or a option that uses free space on flashcards
...
make a guy that can walk with the cursor keys
aim with the touchscreen
and give him grenades guns and stuff
then u can build a castle and blow it up :D

Well, feel free to implement it when I release the source :) Also, memory is not the limiting factor, the CPU is.

sekazi wrote:

Since this is inspired by Crayon Physics shouldnt there be a starting ball and star to collect? Since you will be adding support for saving and loading games this feature would be great so everyone could share levels.

Being inspired by something doesn't mean it has to be a clone, does it? :) I really want to keep the concept the way it is. It won't be hard to add a star and a level system, so feel free to add that when the source is released.

KeithE wrote:

Wow, this is so much fun to play with! Great work so far, and I'm looking forward to the next version.

I love that it has motion card/pak support - thanks very much for that.

Here's an idea:
Allow customization of parameters for every shape (density, friction, elasticity, etc.). You could touch a "customize" button, then touch the shape and a menu with some sliders would come up to allow you to change from defaults.

Well, thank you for making the excellent motion card! Custom physical properties would definitely be cool! I'll add it to my todo list.

Jim e wrote:

How bout something that accelerates objects passing though, like those speed up arrows in racing games.

Or just about anything to satisfy my rube goldberg machine fetish. Springs, tethers, canons, Mentos and Pepsi, anything really.

While I love pocket physics I'm kinda wonder how the box2d lib would stand up in a high speed game, even if used sparingly. Does it have support for simpler grid aligned based map collisions?

I guess I'll stick with the objects that are there now, since I have to draw the line somewhere, but maybe you want to add them? I'm sorry I don't quite understand what you mean by "simpler grid aligned based map collisions". Could you explain that?

eric b wrote:

Pocket Physics is great! Thank you for creating (and updating) it!

Thanks or joining the forum just to tell me that :)

Rocky5 wrote:

Here is some ragdoll action :D

http://www.youtube.com/watch?v=5H-xPHFhmNs

Really great video, and nice work on these ragdoll scenes!

pas wrote:

Please, I think 0xtob is pleased with our ideas, but I guess having a clean thread with Ideas that DON'T REPEAT over and over again would be good

You're right, so I think moving the list to the first post in this thread would be a good idea so the updates don't fill up the thread so much.

gundark wrote:

While we wait for the next version, i've discovered a good way to introduce kinetic elasticity is to double pin the piece you want to act as a spring.

Nice finding! Springs are really fun! Actually this seems to be a bug of Box2D because objects should be completely fixed with two pins.

OSW wrote:

I think I found a bug: It freezes if you press the play button while nothing has been drawn on the screen.

Indeed! Thanks for pointing that out!

gundark wrote:

I suppose when elements are forced to intersect without allowing them force themselves apart some sort of endless loop is pushing the gravity out of whack.

Interesting! That's another bug of Box2D then. The author of Box2D is just working on version 2.0 of his library, so I'll wait until that is finished and only submit these reports if the issues are still there.

Rocky5 wrote:

Ok found to major bugs :(

1. If you create a red object and try to attach a pin to it the ds crashes :(

2. If you draw with the pen tool say you scribble doesn't become a solid object others pass straight through and also if its blue same thing just floats there.

Thanks! The first one will be fixed in the next version, I'm not so sure about the second one because the code I'm using to decompose drawn objects into convex polygons is still under development by another Box2D user. He has promised more robustness though.

woodbin wrote:

Hi i have some ideas for this fantastic app (you rock, 0xtob!!!!!:)

-Rope tool
-Spring Tool
-that portal idea is great but it would be very, very hard to create imo (i am programing in GM)
-Breakable objects!!!!!! for example you'll do a "Window (s :))" and catapult a ball into it. And the window will be smashed to small moving things (to blue objects)
-Hand tool - you could "kick" objects with it, you can pick up object with it

As I said, I won't be adding any more objects. Breakable objects are not supported by Box2D and I think it would be rather hard to implement them. But I'm planning to implement moving of objects with the stylus, which would also work during simulation.

svenhenrik wrote:

It seems like objects are alive even when they've fallen off the screen. If I create a lot of balls that all fall off the screen, the simulation eventually slows down. They can't influence anything and I can't see them, might as well delete them. If I'm right that is, maybe you're already doing this and the slowdown is from something else :)

Add impulse force. When no tool is selected, a click with the stylus on an object could add an impulse force to the closest edge, parallell to the normal of that edge. The force could be proportional to pressure, but that might require a calibration mode aswell like in Colors!.

Normally, Box2D checks if an object moves out of the world's bounds and freezes it. I'm not sure why frozen objects still sometimes slow down the simulation. About the force idea, I think it would be more intuitive to "throw" objects with the stylus, what do you think?

Thank you all for your great ideas, bug reports, videos and support! As I said earlier, I cannot implement everything that was suggested, even though there were some pretty great ideas; but I just want to finish what I started and then release the source code so the other cool stuff will hopefully be added by someone else. If someone can't wait until that, I'll give you the source on request.

The to do list that was maintained and updated by pas (thanks for that!) is now in the first posting in this thread. I split it into "to do", "maybe" and "other", where "other" means things that would be cool but that I will leave to someone else to implement.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

Ok, thanks for taking your time again ^^. We'll wait from now on (I guess we should stop suggesting from now on except for bug stuff because anything will get out of borders if we continue!)
_________________
Starcraft DS ?

No, let's continue to collect ideas here. I probably won't extend my to do list any further, but if someone picks up the project he might get some inspiration from the idea list and they might get implemented after all :)
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

Just wanted to say thanks for the app. Couldn't get my girlfriend into any homebrew apps, she generally prefers crappy shovelware DS games. After looking at my DS and asking what I was doing, she ended up playing around with PocketPhysics for around 5 hours, summoning me every 15 minutes (like a kid) to see her latest masterpiece.

To offer a quote from a non-technical, casual-gaming source, "I don't know why I like it. It's just really cool because things really work instead of faking it like games do".

Between this and Nitrotracker, you're quite the formidable dev.
_________________
DSL Onyx w/ R4 & 1GB Kingston SD. FlashMe'd v.7

0xtob wrote:

No, let's continue to collect ideas here. I probably won't extend my to do list any further, but if someone picks up the project he might get some inspiration from the idea list and they might get implemented after all :)

Well, I guess after you implemented your Todo list and put out the more functional source I guess: you are right, someone might pick it up (like they did with licks ipod mediaplayer and DS2Win).

OK, guys, Ideas !?
_________________
Starcraft DS ?

After a marathon session last night, I have two more suggestions for whoever cares:

-toggle motion card control on/off during playback
-delete pins without deleting the object they're pinned through

I certainly hope someone picks up the source after 0xtob gives it up. If developed further, Pocket Physics could be reason enough to own a DS just on its own, let alone owning a flash cart if you already have a DS.

...word is bondage...

TheYak: Hey thanks! And nice quote indeed :)
Sweater Fish Deluxe: Thanks, I added those to the list. Deleting pins will be tricky though.

Current status: kavaler ported box2d 2.0 (unstable) to fixed point and I'm trying to move to that version now. I'm having funny bugs with it though, so I'm not sure if I'll keep it or wait for the stable version. Also, I'm happy that Erin Catto, the author of Box2D, has agreed to include our fixed point patch into Box2D once he's finished with 2.0!
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

Quote:

About the force idea, I think it would be more intuitive to "throw" objects with the stylus, what do you think?

Absolutely, that would be better.

0xtob wrote:

TheYak: Hey thanks! And nice quote indeed :)
Sweater Fish Deluxe: Thanks, I added those to the list. Deleting pins will be tricky though.

Current status: kavaler ported box2d 2.0 (unstable) to fixed point and I'm trying to move to that version now. I'm having funny bugs with it though, so I'm not sure if I'll keep it or wait for the stable version. Also, I'm happy that Erin Catto, the author of Box2D, has agreed to include our fixed point patch into Box2D once he's finished with 2.0!

What kind of fixed point is it, 20.12? Wait, all the math was float till now?? So what kind of speed bump would we see?

You misunderstood something: It was fixed point before but I'm using a newer version of Box2D now. I'm using 16.16 fixed point.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

I finally tried this out today and must say I'm so glad that you decided to do this. When I saw Crayon Physics, I wanted it so badly on the DS. And even though I was only able to spend a few minutes with Pocket Physics, I know I could spend hours playing around with it. Many thanks!

I did happen to find an intermittent bug, though. It seems to happen when you close the lid. Sometimes it'll work fine. Other times it will freeze when it tries to resume. It does this whether it is playing the animation or not. At first I thought it was just when it was animating the action, but it seems to be more random now.
_________________
Cobalt/Black NDSL
CycloDS Evolution (firmware 1.55 BETA 3) and EZFlash 3-in-1
Kingston SD-C02G JAPAN 2GB MicroSD
MoonShell 1.71, DSOrganize 3.1129, QuakeDS Pre3, ScummVM DS 0.11.1, Pocket Physics 0.6, OpenTyrian DS 0.3

I have uploaded aload of videos of testing stuff you can do with pocket physics to my blog so feel free to check them out.

My Blog
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

Last edited by Rocky5 on Sat Jan 19, 2008 10:22 am; edited 1 time in total

nice videos rocky.

The Diving Board test is awesome :D

MechaBouncer: Thanks for the report! I'll look into it.
Rocky5: Cooool! Nice videos! Looking forward to the tutorials :)

Little update: 0.3 is close to finished. Scrolling is there and working really nicely! I'm still undecided about the size of the world though. 3x3 screen sizes is nice and big, but you kind of feel lost sometimes, so I might as well go for 2x2. Also, the beginning and end of lines are not connected automatically any more.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

When you increase the world size, are you planning to implement a zoom tool to zoom out to see the full screen in action? I can imagine zooming in to setup the finer details, but zooming out to watch the whole thing unfold. And if that's the case, it would seem like 2x world size would be like the max you would want because I would think that it would be really difficult to see everything otherwise.
_________________
Cobalt/Black NDSL
CycloDS Evolution (firmware 1.55 BETA 3) and EZFlash 3-in-1
Kingston SD-C02G JAPAN 2GB MicroSD
MoonShell 1.71, DSOrganize 3.1129, QuakeDS Pre3, ScummVM DS 0.11.1, Pocket Physics 0.6, OpenTyrian DS 0.3

Thanks 0xtob though in the next release will there be saving and loading?

If not then its cool am still looking forward to it cant wait keep up the good work and thanks again.
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

MechaBouncer: I initially wanted to display the whole scene on the top screen and the zoomed in view on the bottom. I'm still having difficulties with the dual screen setup; it works fine for few objects, but starts flickering horribly with lots of objects. If I can not find a fix for this, I'll stick with one screen and add zooming instead.

Rocky5: Saving and loading won't be in the next version, I'm still thinking about how to implement it best, i.e. how to make it easy and hassle-free. I think I'll use a slots system like in Colors.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

Always good to see this project continued !

the slots system sounds good ! How much slots could be done ? Infinite ?

Btw: I dualscreens really are that big problem I guess zooming one one screen would work out good ( using the shoulder buttons for this perhaps ?)
_________________
Starcraft DS ?

Another update: I got dual screen working reliably! I'll just do some more optimizations to Box2D and then release the new version.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

ooo I cant wait thanks again for this app (game)
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

ooo i can't wait,too! So the scrolling will be at normal speed?
_________________
Red dwarf and Futurama Fan!!!!
DS+M3Real owner!!!
Homo sapiens otakus nipponus :)

when i checked this thread this morning i was quite dissapointed to hear that dual screen was about to be abandoned.
BUT YOU SAVED THE DAY!
cant wait!

*BITING MY NAILS IN ANTICIPATION*

I know how you feel lol i keep checking this page every 30mins hoping it out.

Oxtob if your there will it be tonight or tomorrow or another day the new version will be out.
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

Happy one month anniversary, everyone! One month ago, the first version of Pocket Physics was released. It's already become well-known on several sites, and just in general works really well.
_________________
Hmm?

Im checking this page every 15 minutes when i am at PC! I really really can't wait for the new ver!
_________________
Red dwarf and Futurama Fan!!!!
DS+M3Real owner!!!
Homo sapiens otakus nipponus :)

Sorry to post again but is there any news on version 3 as i really cant wait i want looking forward to it :)
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

Relax, people :) 0.3 is under way, but I'm still struggling with some bugs. I would say it's nearly finished, but you never know how long it takes to chase and fix a bug.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

lol, there was a lot of hype about the new updates, everyone is proper excited about this next release.

After quite some struggle with numerical problems, I'm happy to announce: Pocket Physics v0.3 is out!

Get it from the project homepage!

Thank you everyone for your ideas, support, videos, etc! Those have increased my motivation a lot!

So, tell me what you think about the new features!
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

the link for the zip is old, still 0.2 :( i think i might cry

I fixed it, thanks for letting me know!
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

I thank you again love it.
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

thanks 0xtob, i was hoping dual screen would be as good as i expected, and it is! great work. i was also hoping that u would have it so u can make an object larger than the screen (by holding down the stylus and moving the zoomed area)
keep up the good work.

thanks for the new version 0xtob, just a few things, when i try and launch the app i get a white screen, however when i use dsorganize, it works... im using a ninjapass x9. also i created a blue objext and when i tried to clear the screen (destroy the world, it crashed ) but no it wokrs okay.

Ok this new version has crashed twice in a row now when i try to create this [Images not permitted - Click here to view it]
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

It seems the crash is caused by a problem with the DS's hardware division. I have uploaded a version that uses slow (but more stable) software division. Unfortunately this introduces some flickering on the top screen, but that's better than the crashes.

So, if you downloaded v0.3, please download it again.

Edit: Another sneak update: While playing around I found a crash that occurs sometimes when stop is pressed. This is fixed now.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

I got a little video out:

http://www.youtube.com/watch?v=Zw0x0A400j4

I'm probably going to do some more...
_________________
Hmm?

Alright, I made two more:

http://youtube.com/watch?v=PTITc_G_r-Q

I always liked making hammers to hit balls or cars in the older versions, so I made a simple "golf" course.

http://youtube.com/watch?v=mQ521Q8uHT0

This one's a bit choppy, but it was another course that I made and I felt like showing it.

And great work, 0xtob! I can't tell you how great this update was. I haven't had a crash yet, so the stability is fantastic. The speed is also really nice.
_________________
Hmm?

Yay! Great work 0xtob!
_________________
Red dwarf and Futurama Fan!!!!
DS+M3Real owner!!!
Homo sapiens otakus nipponus :)

0xtob, looks like I ran into a glitch. I was making a long pipe with a lot of lines:

http://youtube.com/watch?v=GyCA0Ph0IfU

And the ball just stopped at an invisible wall. As I say in the info, I tried re-drawing the lines but the ball would stop in the same place. Do you know why this happens?

New Video:

http://youtube.com/watch?v=NzPKeuNyAOg

Godzilla like monster gets taken down.
_________________
Hmm?

CurlyCarlos wrote:

And the ball just stopped at an invisible wall.

This happens if you have too many objects on screen, it doesn't draw them, but they still exist (I for example some circles ok... MUCH cirlces and after that I drew a red line, which couldn't be seen, but the cirlces still interacted as if it would be there.

oh, and: GREAT WORK ! I really love it ^^ the waiting was worth it for sure !
_________________
Starcraft DS ?

This reminds me alot of the homebrew game rubber bands (incase none of you guys have tried it, check it out)

Devil_Spawn wrote:

This reminds me alot of the homebrew game rubber bands (incase none of you guys have tried it, check it out)

i completely forgot about this, tried it out in its early days, quite buggy but very fun.
pocket physics is THE DADDY right now, maybe springs(or rubber bands) could be implimented in some way?...

I noticed a weird behavior in 0.3, and I don't know if it's a problem in the base physics calculations, or if it has to do with how the primitives are made now...

Draw a static (red) rectangle/box/line as a base, and then draw some *small* (like, as small as you can get it to draw) physics (blue) circles above it.

They will fall, hit the base surface, and then gradually build up speed as they roll to the right. Larger circles will do this also, but it takes longer for them to get rolling.

CurlyCarlos: Nice videos! :) There is actually a maximum number of objects that you can make. Due to a bug, if that limit was reached, objects were still created, just not drawn. I fixed this problem now. By the way the maximum number of shapes is 50. You can reduce the number of shapes in your tunnel by drawing longer lines.

JLSoft: That's an interesting one :) I'm not sure why this happens but you can make some nice Line Rider style stuff with it. I suppose this is some numerical problem that came from the fixed point conversion of Box2D.

I also made scrolling more responsive during simulation; I think it feels much nicer now.

So, please re-download!

And be sure to try out pen scrolling by holding L or R and hold down the pen on the touch screen. This is my secret favorite feature in the new version :)

I'm sorry about all the micro-updates but I don't want to let you guys suffer under problems that I can fix within two minutes.
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No Problem ^^, better Microupdates then nothing ).

BTW: Are the objects drawn by the 3d Hardware ? I assume yes, or ?
_________________
Starcraft DS ?

Yes they are. The 3D engine is far more flexible than the 2D engine and allows for neat stuff like sprites with alpha channels.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

Thanks for the best release yet, 0xtob!!!!! U ROCK!!!
_________________
nicatronTg.awardspace.com
^^go to

Awesome homebrew!!
Well done this is definatly my fav homebrew ever! keep the updates coming :D

Bug

If a v0.4 comes, I'd just like to suggest a small change to how pins are placed since now they're very picky :P

Maybe the pin could only be placed when you lift the stylus, so you can drag it around (while the stylus is still pressed) precisely. Along with highlighting the 1 or 2 objects the current pin location will affect, you can be sure of exactly what's getting pinned :)

Nice idea! I second it.
_________________
Cobalt/Black NDSL
CycloDS Evolution (firmware 1.55 BETA 3) and EZFlash 3-in-1
Kingston SD-C02G JAPAN 2GB MicroSD
MoonShell 1.71, DSOrganize 3.1129, QuakeDS Pre3, ScummVM DS 0.11.1, Pocket Physics 0.6, OpenTyrian DS 0.3

I like this idea! I'll add that.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

And "Pin deleting" button would be good, too!
_________________
Red dwarf and Futurama Fan!!!!
DS+M3Real owner!!!
Homo sapiens otakus nipponus :)

tob:
Can you include loading/saving?
Can you include a way to remove the pin without deleting the object?
Can you include a way to grab and move an object? incase you want to move it a little bit across :)
_________________
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Yes, that are exactly things that I miss in PP! And the rope tool, of course :D
_________________
Red dwarf and Futurama Fan!!!!
DS+M3Real owner!!!
Homo sapiens otakus nipponus :)

I suggest you all read the very first post before posting already mentioned suggestions.
_________________
Starcraft DS ?

I too would like to see more options when applying pins. I love the new PP release, but at least 40% of the time that I am trying to pin an object to another I end up pinning it to the background. Very frustrating.

You know, now that I think about it, the proposed method for highlighting objects when you pin them together and only pinning on release could also work quite well for deleting objects as well. That way, if you're trying to delete overlapping objects, you could drag the stylus around until the one you want is highlighted and then pull the stylus away. I would think that would be helpful in allowing better precision when deleting objects. And, should that work, perhaps it would allow enough precision to delete the pins themselves (unless deleting pins has other complications rather than just selecting the pin itself). Would that be feasible?
_________________
Cobalt/Black NDSL
CycloDS Evolution (firmware 1.55 BETA 3) and EZFlash 3-in-1
Kingston SD-C02G JAPAN 2GB MicroSD
MoonShell 1.71, DSOrganize 3.1129, QuakeDS Pre3, ScummVM DS 0.11.1, Pocket Physics 0.6, OpenTyrian DS 0.3

Here is a pocket physics skin for the Cyclods Evolution.

Image
[Images not permitted - Click here to view it]

Click the link to go to the download area.
http://johnconn.wordpress.com/cyclods-skins/
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

Rocky5 wrote:

View: ROM

Big Brain Academy
Nintendo

Bomberman
UBISOFT Entertainment

Castlevania
Portrait of Ruin
Konami Digital Entertainment

Rocky5 wrote:

View: File

0491 - Big Brain Academy.nds
32 mbytes

0079 - Bomberman.nds
8 mbytes

0881 - Castlevana - POR.nds
64 mbytes

What does this mean? ;-)
_________________
-- Where is he?
-- Who?
-- You know, the human.
-- I think he moved to Tilwick.

Rocky5 is a pirate!

a lol the cyclods skinning tool.
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

.........nneeeed saves..... *gurgles in a pool of his own crayon wax goo*

ARGH... damn damn damn... just been playing with it the past 3 hours and after getting a really cool set of things going with BARELY held up hammers and springs and stuff doing all kinds of things in a really slow, methodical manner, and BAM, no battery... NOOOOOOOOOOO
_________________
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Markzilla wrote:

Rocky5 is a pirate!

However he *may* have dumped them himself omg
_________________
Starcraft DS ?

Chances are slim that he dumped them himself.

Its a program for skinning the cyclods evolution its not the actual ds its a gui based skinning tool for windows.

Located here http://www.teamcyclops.com/forum/showthread.php?t=596&highlight=skin+tool

but any hoo how does it look was thinking of making new icons.
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

Rocky5 wrote:

Its a program for skinning the cyclods evolution its not the actual ds its a gui based skinning tool for windows.

And to clarify since that link will probably get removed, the CycloDS skinning tool creates the screenshots automatically from your skin images and puts the icons for Big Brain Academy, Bomberman and Castlevania there automatically as examples, it has nothing to do with what's on your card.

For instance, here's the skin I made for my CycloDS card:

[Images not permitted - Click here to view it]

takieda wrote:

.........nneeeed saves..... *gurgles in a pool of his own crayon wax goo*

ARGH... damn damn damn... just been playing with it the past 3 hours and after getting a really cool set of things going with BARELY held up hammers and springs and stuff doing all kinds of things in a really slow, methodical manner, and BAM, no battery... NOOOOOOOOOOO

I was thinking that it needs saves mostly because it seems to freeze so often that I can't even ever build up any really cool models. How did you manage to play for three hours without a freeze? Is there something I'm doing wrong that's causing the game to freeze? I haven't noticed any pattern to when it seems to happen, but are there certain things I should never do or something?

...word is bondage...

it seems that on my friends SC DSONE it crashes a hell of a lot more than on my SC lite microsd. for me, if i have a good idea it usualy crashes half way through, if im just mucking around it can go on for hours.

This has nothing to do with Pocket Physics cause it does not use any dldi/fat access, the supercard is just made for "another orientation...".
_________________
Starcraft DS ?

This is interesting about differences in how often the game freezes on different cards. The Supercard DS ONE patches homebrew to allow soft-resetting, so that may explain why it freezes more on that card, but to my knowledge the CycloDS Evolution that I'm using doesn't patch homebrew unless there's a DLDI section, so that wouldn't explain why I get freezing so much. Even previous versions have locked up a lot for me and this isn't something I see other people mentioning very much.

I have a played a couple of very long sessions of the game, but thinking back, these may have been loaded from my G6 Lite because I was using the motion card. I'll have to test that out some more and see if it fixes the freezing.

I don't see why it would be related to what card it's loaded from, though, because everything gets loaded into RAM in one shot and then runs entirely from there, right? Maybe if there's lots of lookup tables to speed up the math even small corruptions that don't normally cause problems in other games could lead to lockups Pocket Physics though? So the problem could just be in the microSD or other flash memory itself.

...word is bondage...

Another new video:

http://www.youtube.com/watch?v=qMzi1LuoHmM

I'll try to remake it, because I really love the level design but the bottom screen should be shown.
_________________
Hmm?

I implemented JLSoft's pin idea and it works quite nicely. I'll use the same method for deleting objects and, while I'm at it, add pin deleting. Thanks MechaBouncer for this suggestion! Rocky5: Nice skin! And yes, saving is the next big thing on my list (finally!)

It's really strange that it seems to crash on certain cards. I personally don't remember any crashes since 0.3, having tested it heavily on GBAMP and R4. I have some other carts floating around. I'll see if I can reproduce the crashes there.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

0xtob, do you think with the next release you could improve the speeds? It's not bad at all right now, but like you've seen in my video it can slow down a bit when there's a lot of objects on the screen.
_________________
Hmm?

Hi! I'm new here, but I got a neat idea for Pocket Physics.

Why not make it possible to use different layers when you draw objects in Pocket Physics? For example:
There would be three layers, one background, one middle and one front layer. The background and front layers would not affect each other, and you would therefore be able to draw shapes over the background layer in the front layer. The middle layer however, would affect both the background and the front layers, but I think that you should be able to change which layer affects which. With this technique you would be able to create gearwheels in one layer and then pint it together with, say a lever.
Earlier in this thread many has requested that we could use the stylus as a realtime handpower, addapting force to objects for moving them. Imagine that you would use this on my idea, thus creating a machinery similiar to a clock or something similiar which you can control yourself with a lever or something.

Also, thanks to 0xtob for this wonderful chunk of code! It really has encouraged me to buy a DS Lite and a homebrew cartridge (I've yet only played Pocket Physics in an emulator)! 10/10!

CurlyCarlos: I'm not sure how to further optimize simulation at the moment. I'm already using fixed point math and hardware div/sqrt. The source code of the box2d library for the DS is available here. Any ideas, or even better, patches, that improve the speed would be very welcome.

Mort Rouge: That's a really nice idea! Box2D supports collision by bitmasks, so this should be fairly easy to do as well.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

^^that layers thing seems a bit compicated, not just coding it, but playing with it, it would be a bit to crazy me thinks. but i would love to be able to move objects for throwing and such.

Nice to hear about the way that pins are done, and the deleting of pins and objects. will this be in a seperate release from the one with the save system?

EDIT: i was thinking about the grid idea for easier drawing, and thought y not just have an option to change the background picture to a grid, but a snapping grid would be even better.

Oh sweet! Thanks for using the idea and for Pocket Physics in general! :D

It seems that perhaps you should start doing sub-version numbering as well for the micro-updates (think bug fixes). You could use v0.3.1 or v0.3a to specify which is which. Then the major additions and changes can be a new version. I think that the behavioral change with how pins and deletes work would warrant an increase to v0.4. Save implementation would also warrant a new version in my eyes (unless it was implemented at the same time). It just helps to keep things in order better for both us and for you. We can tell easier if we need to download again and you can keep better track of whether fixes implemented in one sub-version broke something else (I know I get that all the time). Just an idea to consider.
_________________
Cobalt/Black NDSL
CycloDS Evolution (firmware 1.55 BETA 3) and EZFlash 3-in-1
Kingston SD-C02G JAPAN 2GB MicroSD
MoonShell 1.71, DSOrganize 3.1129, QuakeDS Pre3, ScummVM DS 0.11.1, Pocket Physics 0.6, OpenTyrian DS 0.3

0xtob, I just had a really small idea that might look cool. We all know and love the paper background, but what if you had a blueprint-colored sheet with an overlaying white grid as an option? Kind of faded, too... I don't know if others can picture what I'm talking about.

I personally am not too good at picture making, but I tried:

http://img136.imageshack.us/img136/5654/blueprintoe3.png

I don't really know. I think that this would be a good way to incorporate the whole grid idea that many have asked for, and would give the game a different look and feel.

EDIT: Just found one small, little thing. It looks like you use the NitroTracker dialog box for the destroy world button. The purple and yellow colors don't really fit with the rest of the game. I know this is a small annoyance, but could you change the color scheme?
_________________
Hmm?

Last edited by CurlyCarlos on Sat Feb 02, 2008 5:51 pm; edited 1 time in total

0xtob wrote:

Mort Rouge: That's a really nice idea! Box2D supports collision by bitmasks, so this should be fairly easy to do as well.

Just glad that I can contribute with something ^^!

Also, would it be possible to make the square on the upper screen which signifies where the lower screens position is go away if you push a button like R or L? It would be nice for playback, it's a bit disturbing when you want to see the whole picture.

First I want to say that I like your app! :P

I had a suggestion: why not implement a fuction to control gravity with a button on the screen or pressing ABXY (for lefthanded persons left, right, up and down)
Or a option to control the zoom level

I also like the idea of layers and a "hand" option to pick up things or pull a lever.

And for the idea of a blueprint background: I like the idea of changing the background but then there must also be a option to change the line color.
(sorry for my crappy english :P )

Romaap wrote:

And for the idea of a blueprint background: I like the idea of changing the background but then there must also be a option to change the line color.
(sorry for my crappy english :P )

Do you mean the color of the shapes? Yeah, I agree. Maybe white and black?
_________________
Hmm?

0xtob: Try to get rid of some signed numbers, should speed it up a little bit. Also, if you ever use swap, try to use XOR swap.

How hard would rope be to simulate?

I can kind of do it with lots of long boxs and pins, but an actual rope tool would be nice.

==

Incidently, I'm curious how sometimes the same set up can give different results when you play it many times.
This isnt a complaint, just puzzled where the random factor comes in.
_________________
Darkflames Reviews --
Make your own at;
Rateoholic:Reviews for anything, by anyone.

Darkflame wrote:

Incidently, I'm curious how sometimes the same set up can give different results when you play it many times.
This isnt a complaint, just puzzled where the random factor comes in.

I have this problem too! It makes it difficult to film stages, because sometimes you won't get the outcome you want.
_________________
Hmm?

0xtob said about this before, something about the calculations for the physics.
i like this tho, it gives it a more realistic feel.

Guys and Girls! Version 0.4 is ready!

Get it now!

This release adds saving and loading capabilities, so you'll never lose your work again! Also you can now share your sketches with others! The files are called .pp and have a simple XML format. Remember you now need to patch Pocket Physics with DLDI!

Also, smart pin placement and deleting, as discussed earlier, are now supported. Check the readme for further details.

MechaBouncer wrote:

It seems that perhaps you should start doing sub-version numbering as well for the micro-updates (think bug fixes).

Sure, why didn't I think of that? I'll try to do that from now on to avoid confusion.

CurlyCarlos wrote:

0xtob, I just had a really small idea that might look cool. We all know and love the paper background, but what if you had a blueprint-colored sheet with an overlaying white grid as an option?

With the included XML library, I think skin support shouldn't be too hard to add. I tried using a blueprint background and brighter line colors, which looked very nice!

Romaap wrote:

I had a suggestion: why not implement a fuction to control gravity

I guess I'll implement changing the gravity with the stylus to make non DS Motion owners happy as well :) For now, you can change the gravity by editing the save files.

Darkflame wrote:

How hard would rope be to simulate?

Well, I could add a tool that just makes a lot of long boxes connected by pins and call that a rope, but it turns out that these configurations are rather unstable. Try to make a rope and attach a really heavy weight to it and you'll see the individual boxes flying away in all directions. I don't want to add ropes before that is sorted out. Luckily, saving and loading will make debugging this much easier.

Please tell me what you think about the new features and please inform me if you find any (new) bugs.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

I think it's semi-locked up twice on me, while in play mode. I can scroll the screen but the buttons don't respond, is there something that locks them or is it possibly a bug?

Whooo!
I love it :)

Ps. No bugs so far

Dib: The phyiscs and pen input runs independently from drawing and scrolling. So, if the physics part locks up, you can still scroll.

I forgot to mention: If you experience crashes or other problems: Make a save, that reproduces the problem (using the least amount of shapes possible) and send it to me.
_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

Bug:
If you try to put a pin into a static line, the pen interface locks up.

Just gave 0.4 a very quick run through and I must say, it's amazing. The new pin placement is AWESOME, and the saving / loading worked perfect. Already made a good ragdoll simulation with the pins. Thanks!

Awesome work as always, 0xtob

The new pin-placing works exactly how I pictured it :D

The lock up for me seems to work something like this:

Draw several red diagonal lines (let's say four) positioned so rolling things would fall off one, down the other, etc

Now switch to blue and start drawing some little balls. Yes, I should be using the circle tool but this is testing afterall, and it's actually my first time trying this program.

Anyway, it seems to lock up after a few moments each time. I've managed it a few other ways too, like while in play mode just drawing some intersecting red lines and so forth. Sometimes it locks up just with a single red line and a single blue circle drawn with the line tool.

Since the scrolling and keys don't lock up, may I suggest a hotkey for soft reset? L+R+select+start is my personal favorite, you could have it reinitialize everything from scratch so a cold restart wouldn't be necessary.

On another note, should the swishing sound be looping indefinitely? After I draw just one line, it doesn't stop playing the sound until I press a button to switch tools or play/stop.

FYI, ny hardware is a classic NDS and a DS-X v1.1.0.

By they way, this is excellent work. This will probably be a lot of fun for the kids too.

Another suggestion, if you don't mind: I think this program is begging for a hand tool. By switching to it, you could grab objects on screen and drag them, or collide your pointer with objects to bump them around.

Good job on this homebrew so far, it is really fun to play with.

I have noticed that patched/unpatched copies will not launch on the M3 Lite. The load screen "Pocket Physics" is displayed, however, clicking once on the touch screen goes to a black screen. It will boot up properly from within moonshell. I'm not sure if this is a M3 Lite specific problem or not. It isn't a big deal at all, just thought I would mention it.

Not sure what is up with this: The very first time I ran this I put pocketphysics.nds in my "NDS" folder on my M3 Lite. I tried to save and the app created a "pocketphysics" folder in root but would not let me save. I then instead put pocketphysics.nds in root and saved and it worked correctly. After that I copied the .nds rom and the "pocketphysics" folder back to my "NDS" directory. This was of course an attempt to see if the app would save to the folder using a direct path or not. This second attempt I was unable to load anything, which made me assume that the path of the original save is stored in the file. So I drew something new and saved it, and on this second attempt it saved to a newly created "pocketphysics" folder in root. I shut down my NDS and then powered back up and was able to load it. I'm not sure what is up with all that. It could very well be a M3 Lite thing. Perhaps others could comment.

If I create any stable ("red") shape and then click the PIN icon and then click on the "red" shape, the touch screen controls freeze up. My understanding is that you can only pin dynamic shapes, as they receive a green check mark. So this has to be a bug? I have tried making multiple shapes, adding balls, etc. However, everytime I click the PIN icon and then click on a "red" shape this occurs.

I am using a DS Lite (unflashed) with an M3 Lite and an R4 as the passme. I have no tested this on the R4, but I could if you need more feedback.

*Cheers*
-AW

Hi, i was wondering how much work it would be to make the .pp format compatible to the iPhysics format, so that levels from iPhysics (the iPhone version ;-) could be played using pocketphysics.

the iPhysics website is here:
http://www.iphone.r4m0n.net/

some levels available here:
http://iphysics.r4m0n.net/index.php?title=Custom_Levelpacks

levelpack format is described here:
http://iphysics.r4m0n.net/index.php?title=IPhysics_Levelpack_Format

leveleditor here:
http://iphysics.r4m0n.net/index.php?title=IPhysics_Level_Editor

just an idea... loving this game already

daniel.

as expected there are some problems for saving for me. sometimes i can save perfectly. sometimes the save thumbnail will be blank, and so will the screen when i load it up. sometimes there are little blank squares over the save thumbnails, like someone has "erased" a small square.
and two of my saves didn't save the file as a .pp, but just as a file (i think i used the name "GGGGGGGGGGGGG").

i will send you a screenshot and the save files if this helps.

edit: hopefully your email is "me@..." rather than "0xtob@..."

THAT IS GREAT! now it have all it needs! (Except...you know what i want to say XD)
_________________
Red dwarf and Futurama Fan!!!!
DS+M3Real owner!!!
Homo sapiens otakus nipponus :)

i found a bug - PP will freeze when you pin the red object only or tap it at first :?(
_________________
Red dwarf and Futurama Fan!!!!
DS+M3Real owner!!!
Homo sapiens otakus nipponus :)

I found a bug: (it was also in v0.3)
Sometimes, when many objects are on the screen, all object just go flying around like a bomb has just exploded.
Also I'd like see a option to "glue" objects to each other (so they act as one object)

Amazing work again, 0xtob! I love the new pins features, and saving will come in handy if I want to film a level but can't do it right then. Speaking of which, I put together a quick video showing some of the new features:

http://www.youtube.com/watch?v=67GgzfDxChE

I just show the pins and the saving here. Hopefully there'll be more to come!
_________________
Hmm?

I just gave the new features a quick go and must say it's fantastic! :D I'm sure I can get some people interested in homebrew just by showing off Pocket Physics.
_________________
Cobalt/Black NDSL
CycloDS Evolution (firmware 1.55 BETA 3) and EZFlash 3-in-1
Kingston SD-C02G JAPAN 2GB MicroSD
MoonShell 1.71, DSOrganize 3.1129, QuakeDS Pre3, ScummVM DS 0.11.1, Pocket Physics 0.6, OpenTyrian DS 0.3

hey
i found a bug in the pin system (it was in 0.3 too)
basically if you start the simulation, pause the game, and then pin an object, it will work after you resume the simulation, however after you restart it the pin will return to where you placed it when it was paused, causing objects to be pinned to objects a long way away from them

My game froze when I created one giant blue line with the line tool... as long as it would let me draw, I went and zig zagged all over the screen, and I was going to hit play to see if it would fall slowly but it wouldn't let me click on anything, hence I couldn't save it. I'm going to fool around with that some more tonight.

I would love for it to be a cannon that shot a shape you drew in a direction you choose... but anyways, I like this game
_________________
rasengan

0xtob wrote:

Pocket Physics is a physical construction set for the DS. Like in Crayon Physics, you draw objects which then become physical and interact with each other. It uses my DS port of the Box2D library by Erin Catto.

Get it from the project homepage

Feel free to leave any kind of comments here.

Edit: Pocket Physics will be open sourced! If you want to take a look at the source now already, just ask.

Here's a list of features I'm still planning to implement. Features that people suggested and that I think would be interesting are listed under "other". I will not implement them but I hope someone else wants to!

To do:
- moving shapes with the stylus
- changing physical shape attributes
- layers
- changing the gravity with the stylus
- skins

Maybe:
- duplicating shapes
- grid that allows easier drawing
- gravity changing with the stylus
- ropes
- motors
- maybe, but probably not: portals

Other:
- addition of a level system (like the star in Crayon Physics)
- the background music used in Crayon Physics [mp3][raw].
- a straight line tool
- filled objects
- undo/redo
- snapping objects when moving them
- pin auto-centering
- springs/balloons/anti-gravity fields/cats/ragdolls/bombs (a while object libraray like in "The incredible machine" would be cool!)
- zoomable bottom screen
- breakable objects
- toggle motion card control on/off during playback
- delete pins without deleting the object they're pinned through
- export to image sequence (for making videos)

_________________
http://blog.dev-scene.com/0xtob | http://nitrotracker.tobw.net | http://dsmi.tobw.net

your todo list look pretty good to me ! The only thing I would really want to be included (cause I always wished a incredible machine type game could make it to the DS) would be the said object library (maybe ask us for suggestions ?).

Although I would understand if this woudl be too much work.
_________________
Starcraft DS ?

Oops, by pressing "Quote" instead of "Edit" I accidentally copied the first post.

I'm very happy you guys like the new features :)

I haven't seen anyone sharing their work so far, which is probably due to a lack of a place to put the files. So, I think a public pocket physics gallery where everyone could submit their creations would be cool. It could be all Web 2.0 with a comment function etc. Would anyone be interested in setting up such a thing? If so, I can hack together a ppToPng PHP function for displaying thumbnails online.

Dib wrote:

The lock up for me seems to work something like this:

Draw several red diagonal lines (let's say four) positioned so rolling things would fall off one, down the other, etc

Now switch to blue and start drawing some little balls. Yes, I should be using the circle tool but this is testing afterall, and it's actually my first time trying this program.

Hmm, I tried but I can't seem to reproduce the crash. Could you try making a save file of this setup?

Dib wrote:

Since the scrolling and keys don't lock up, may I suggest a hotkey for soft reset? L+R+select+start is my personal favorite, you could have it reinitialize everything from scratch so a cold restart wouldn't be necessary.

This is harder than it sounds :) Since the main loop has locked up and only drawing and input handling via vblank interrupt handler is still working, the vblank handler would somehow need to bend the instruction pointer of the main cpu context to the initialization. I'm not sure this is possible at all.

Dib wrote:

On another note, should the swishing sound be looping indefinitely? After I draw just one line, it doesn't stop playing the sound until I press a button to switch tools or play/stop.

No it shouldn't. It should stop when you raise the pen. This seems to be a problem with some cards. No idea how a bug like this can be card-dependent.

Dib wrote:

Another suggestion, if you don't mind: I think this program is begging for a hand tool. By switching to it, you could grab objects on screen and drag them, or collide your pointer with objects to bump them around.

Yep, that's planned (See the todo list on the first page)

another world wrote:

I have noticed that patched/unpatched copies will not launch on the M3 Lite. The load screen "Pocket Physics" is displayed, however, clicking once on the touch screen goes to a black screen. It will boot up properly from within moonshell. I'm not sure if this is a M3 Lite specific problem or not. It isn't a big deal at all, just thought I would mention it.

I think it locks up when it tries to initialize FAT. Did you patch it with the correct DLDI driver? It's strange though that it works from Moonshell, since I'm not aware Moonshell is doing auto DLDI patching.

another world wrote:

Not sure what is up with this: The very first time I ran this I put pocketphysics.nds in my "NDS" folder on my M3 Lite. I tried to save and the app created a "pocketphysics" folder in root but would not let me save. I then instead put pocketphysics.nds in root and saved and it worked correctly. After that I copied the .nds rom and the "pocketphysics" folder back to my "NDS" directory. This was of course an attempt to see if the app would save to the folder using a direct path or not. This second attempt I was unable to load anything, which made me assume that the path of the original save is stored in the file. So I drew something new and saved it, and on this second attempt it saved to a newly created "pocketphysics" folder in root. I shut down my NDS and then powered back up and was able to load it. I'm not sure what is up with all that. It could very well be a M3 Lite thing. Perhaps others could comment.

Pocket Physics always creates a pocketphysics/sketches folder in the root of the file system, no matter where the .nds is located. Not sure why it didn't work for you the first time.

If anyone has problems saving, check if the folder pocketphysics/sketches exists in the root of your card, and, if not, create it manually.[/quote]

daniel309 wrote:

Hi, i was wondering how much work it would be to make the .pp format compatible to the iPhysics format, so that levels from iPhysics (the iPhone version ;-) could be played using pocketphysics.

I had a look at the iPhysics format, and I don't think it's impossible, but certainly a lot of work. Since I want to finish Pocket Physics soon, I'll put that on the "Other" list for someone else to do.

jay001 wrote:

as expected there are some problems for saving for me.

Thanks, I got you e-mail. Will look into that.

Romaap wrote:

I found a bug: (it was also in v0.3)
Sometimes, when many objects are on the screen, all object just go flying around like a bomb has just exploded.
Also I'd like see a option to "glue" objects to each other (so they act as one object)

I'm not yet sure what causes this bug. I'll try to find out. You can "glue" objects together by drawing them overlapping and fixing them with two or more pins :)

CurlyCarlos wrote:

I put together a quick video showing some of the new features

Cool, thanks for the ad :)

Devil_Spawn wrote:

basically if you start the simulation, pause the game, and then pin an object, it will work after you resume the simulation, however after you restart it the pin will return to where you placed it when it was paused, causing objects to be pinned to objects a long way away from them

I know this, but I'm intentionally leaving it in since it can be used for interesting things. One way to "fix" this would be to forbid pinning in play/pause mode, but why should I unnecessarily limit the user?

El_Posible wrote:

My game froze when I created one giant blue line with the line tool... as long as it would let me draw, I went and zig zagged all over the screen, and I was going to hit play to see if it would fall slowly but it wouldn't let me click on anything, hence I couldn't save it. I'm going to fool around with that some more tonight.

This seems to be a crash in the line drawing code. I'll try to see what's causing it. To answer your question: Yes, a very big line will fall slowly, but not because air resistance is simulated but because simulation will run slowly :)

kurosakinaruto wrote:

I would love for it to be a cannon that shot a shape you drew in a direction you choose... but anyways, I like this game

I initially had this idea as well, but I think it would take too long to implement, so I'll add it to the "Other" list.
_________________
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hm .. freezed for me on G6Lite when opening any of saved by myself files

also this one behaves strangely
http://theli.ho.com.ua/temp/2.pp
before adding circle it was fine
http://theli.ho.com.ua/temp/1.pp

theli: The problem with your sketches occurs when there is too much stress on the joints. This probably has to do with my numerical fixes. I'm trying to find out what's wrong.
_________________
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perhaps Rocky5 wouldnt mind creating the .pp sharing thing. seeing as he has the website with the videos and (soon) tutorials.

If i can i will but the site i use is only a free blog site so not so sure how to do it but will look into it for you guys and thanks again for the simulator

though again it crashes when you try and put a pin on a red object you can still move about but you cant do anything.
_________________
My Pocket Physics Stuff
Black NDSL.
CycloDS Evolution (firmware 1.3) + EZ-Flash 3-in-1 + Removed Rumble Was To Loud.
SanDisk 2GB MicroSD.
Best Game So Far Pocket Physics 0.6.

Rocky5 wrote:

If i can i will but the site i use is only a free blog site so not so sure how to do it but will look into it for you guys and thanks again for the simulator

though again it crashes when you try and put a pin on a red object you can still move about but you cant do anything.

Including a pin into a red object is useless anyway...
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Starcraft DS ?

0xtob wrote:

I think it locks up when it tries to initialize FAT. Did you patch it with the correct DLDI driver? It's strange though that it works from Moonshell, since I'm not aware Moonshell is doing auto DLDI patching.

Yes I patched it with the correct DLDI driver. I tried it both with DLDIrc and Dlditool-win32-gui. I double checked awhile back to make sure I had the right DLDI driver. I also had this problem with Cluster's c|irc homebrew. It will only launch fully if I launch it from within moonshell. I have read that some others have also experience this, with some homebrew and the M3 Lite. Again it is not a big deal, throwing moonshell in the mix, just thought I would mention it. =)

I also noticed after watching some YouTube vids that the sound efx of the "drawing" is not working properly for me on the M3 Lite. If I draw a static ("red") object the sound contines even after I have lifted the stylus off of the nds.

cheers,
-AW

pas wrote:

Rocky5 wrote:

If i can i will but the site i use is only a free blog site so not so sure how to do it but will look into it for you guys and thanks again for the simulator

though again it crashes when you try and put a pin on a red object you can still move about but you cant do anything.

Including a pin into a red object is useless anyway...

Yes, but what if it was a mistake? I found the bug myself after accidentally hitting the pin button rather than one of the shape buttons. It's a silly way to crash the system, really.

One minor request: would it be possible to have the program check for data in the "(root)\DATA\pocketphysics" folder rather than just "(root)\pocketphysics"? It helps organize the root folder if developers allow for this data location convention.

dantheman wrote:

One minor request: would it be possible to have the program check for data in the "(root)\DATA\pocketphysics" folder rather than just "(root)\pocketphysics"? It helps organize the root folder if developers allow for this data location convention.

I'd like to second this request... It would be very nice to have ALL Homebrew run extra files in "data", but hey, we gotta start somewhere :)
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pas wrote:

Rocky5 wrote:

If i can i will but the site i use is only a free blog site so not so sure how to do it but will look into it for you guys and thanks again for the simulator

though again it crashes when you try and put a pin on a red object you can still move about but you cant do anything.

Including a pin into a red object is useless anyway...

this can sometimes happen by mistake, if there is a very skinny blue object that u want to pin to a red object, you can sometimes miss the blue object and go directly into the red one. (but this shouldnt happen really, as the pin placing has changed)

EDIT: sorry didnt see this has already been explained lol.

My layer idea's coming up in 0.5? Eager to see ^^!

His layer idea's coming up in 0.5? Eager to see ^_^!

jay001 wrote:

pas wrote:

Rocky5 wrote:

If i can i will but the site i use is only a free blog site so not so sure how to do it but will look into it for you guys and thanks again for the simulator

though again it crashes when you try and put a pin on a red object you can still move about but you cant do anything.

Including a pin into a red object is useless anyway...

this can sometimes happen by mistake, if there is a very skinny blue object that u want to pin to a red object, you can sometimes miss the blue object and go directly into the red one. (but this shouldnt happen really, as the pin placing has changed)

EDIT: sorry didnt see this has already been explained lol.

Seeing your saying that reminds me of that on/off switchable grid mentioned earlier.
_________________
Starcraft DS ?

Mort Rouge wrote:

Hi! I'm new here, but I got a neat idea for Pocket Physics.

Why not make it possible to use different layers when you draw objects in Pocket Physics? For example:
There would be three layers, one background, one middle and one front layer. The background and front layers would not affect each other, and you would therefore be able to draw shapes over the background layer in the front layer. The middle layer however, would affect both the background and the front layers, but I think that you should be able to change which layer affects which. With this technique you would be able to create gearwheels in one layer and then pint it together with, say a lever.
Earlier in this thread many has requested that we could use the stylus as a realtime handpower, addapting force to objects for moving them. Imagine that you would use this on my idea, thus creating a machinery similiar to a clock or something similiar which you can control yourself with a lever or something.

Also, thanks to 0xtob for this wonderful chunk of code! It really has encouraged me to buy a DS Lite and a homebrew cartridge (I've yet only played Pocket Physics in an emulator)! 10/10!

Reminds me of;
http://www.youtube.com/watch?v=mcAq9bmCeR0

:D
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the ability to stop two objects colliding with eachother would be useful, much like what happens when you pin them together

sorry 0xtob, if you have been trying to solve my saving problem, i have just figured out that my new firmware for my supercard auto patches homebrew with the wrong dldi, which doesnt work for supercards (bit weird). so ive disabled the auto patch and its working fine now :-)

Hoooooo god

edit: also could you make it so you can delete saves aswel, its a bit of effort to go into ds organize to delete stuff.

i have an idea which is something to do with the Colors! app;
in colors! you can send your picture to an email address. so what i think you should be able to do is send your pp saves to the website "someone" is going to create. and from there people can brows other people's saves. if however, you could brows the saves ON your ds, that would be perfect.
how does it sound?

jay001 wrote:

i have just figured out that my new firmware for my supercard auto patches homebrew with the wrong dldi, which doesnt work for supercards (bit weird).

What happens if you replace the 'dldi.scp' file with the correct DLDI?
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^^ im not sure, it would probly work lol, but im happy at the moment with manual dldi patching.

over on Rocky5's site,

Quote:

tripppy Says:
February 11, 2008 at 12:28 am
hey

seen the new version of pocket physics?
you can save creations now!

yours by far have been the best i have seen.

im going to do a site up with a mate. (pp.mnfu.com)
to host these .pp files with screen shots.

i would like to get some of you creations up.

i just want to take a screen shot of them? know how to?

seems like someone is doing something about the site.

* when I draw a rectangle with a pin, it will rotate. then I pause while its rotating and draw a circle or something attached. after this, the "restart" is buggy =/
so maybe a Chackpoint button (making the current moment the initial) would be ok

* ropes would be cool

* some music

bye

tepples wrote:

jay001 wrote:

i have just figured out that my new firmware for my supercard auto patches homebrew with the wrong dldi, which doesnt work for supercards (bit weird).

What happens if you replace the 'dldi.scp' file with the correct DLDI?

Another idea, since dldi.scp is just a renamed DLDI file, is to take Barni's modified DLDI file and rename it to DLDI.scp. This fixes problems I had with the stock dldi.scp screwing up LMP-ng, which makes me think it's a problem with unaligned reads and writes. However, I've renamed my dldi.scp file to stop it from auto-patching, as I'm too used to manual patching to bother with something that could be buggy.

pp.mnfu.com

its where im trying to setup a collection of .pp files

at the moment users can't upload their own creations.

so signup. create a user, wait less than 1 day and ill contact you.

for now. ill be accepting emailed .pp files and ill upload and display them manually.

any help in setting up the site and improving it would be much appreciated.

0xtob can you please add this?:

Moving with objects (and kicking them during simulation)
Rotating objects

And when will be new release?
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woodbin wrote:

0xtob can you please add this?:

Moving with objects (and kicking them during simulation)
Rotating objects

And when will be new release?

As far as affecting objects in the simulation, I always felt it should be that you have to affect one object with another... it'd be more interesting that way if you could grab a hammer like object and attack another with it, rather than just slide the stylus into the object. You'd get more of a realistic response with it, plus you'd understand why the other object reacts the way it does. i.e. when you just slide the stylus into the object and it moves, and do it again and it flies twice as far with no good idea as to why, vs. sliding a pea object into a much larger one and the larger one barely nudges, but slide a bowling ball into a pea and the pea goes flying at mach speed :).

And I would like to see the ability to move with say a tagged object, otherwise it might try to move erratically when several objects on the board are moving around.
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Craig, an editor from IGN, has mentioned Pocket Physics in his blog.

http://blogs.ign.com/craig-ign/2008/02/12/80371/

Quote:

You?ll need a way to put a DS file onto a DS cartridge, and since there was a report that 90 percent of you already have a way to do it, I?m not going to tell you how. So nyah.

I was shocked to find it on the front page of IGN DS.

garethfc wrote:

maybe a Chackpoint button (making the current moment the initial) would be ok

good idea, I'll add that to the list.

woodbin wrote:

0xtob can you please add this?:

Moving with objects (and kicking them during simulation)
Rotating objects

And when will be new release?

Please look at the to do list (first page of the thread) before requesting features, so you don't request something that's already in there.

I can't say when the next release will be. I'm currently working on some speed optimizations and trying to find the physics bugs. This is progressing only slowly. The next release will probably be a small one that addresses bugs and improves speed.

coolbho3000 wrote:

Craig, an editor from IGN, has mentioned Pocket Physics in his blog.

I was shocked to find it on the front page of IGN DS.

And so was I :) I'm surprised the guy didn't give up on it even though it was so unstable for him. "The Greatest Nintendo DS Game Ever" probably means a lot coming from someone who has tested that many commercial titles (And I didn't pay him, I swear!) So, I feel quite flattered.

tripppy wrote:

pp.mnfu.com its where im trying to setup a collection of .pp files

Nice effort so far! Yet I hope the uploading mechanism will be more dynamic. I'm also not sure if a blog is the way to go.

Well, since everyone is writing me wishlists, I might as well write everyone a wishlist of how I would imagine a PP sketch sharing site:

Users can upload their sketches and give them a name
The screenshot of the sketch is automatically extracted from the PP file (Here's the PHP code for that)
Users can comment on and rate sketches
Sketches can be browsed by Rating, Creator, Name, etc
(Optional) The title should say "beta" somewhere and there should be reflections in the logo

Then of course, sharing via wifi directly from the DS would be the next step.

I'm not sure how to best realize this. I'd probably start this from scratch since it's not that much work and I'd have control about everything. But maybe extending an existing CMS that already provides commenting, rating and searching functionality might work well too.
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thanks for all the effort so far 0xtob, but please please the one thing i have wanted from the beggining was a circle tool that has a pin in the center, so the ball wont roll off center. its so difficult to make a good car!
please could you impliment this somehow as it is the one thing that i need for pocket physics to be PERFECT!

gbadev.org forum archive

DS homebrew announcements > Pocket Physics

#147572 - 0xtob - Sun Dec 23, 2007 8:01 pm

#147575 - Devil_Spawn - Sun Dec 23, 2007 9:43 pm

#147577 - Programix - Sun Dec 23, 2007 9:58 pm

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#147593 - 0xtob - Mon Dec 24, 2007 3:24 am

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#147597 - __HBK__ - Mon Dec 24, 2007 4:07 am

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#147614 - pas - Mon Dec 24, 2007 2:33 pm

#147619 - Rocky5 - Mon Dec 24, 2007 4:32 pm

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#147877 - sekazi - Sat Dec 29, 2007 5:57 pm

#147881 - automat - Sat Dec 29, 2007 7:43 pm

#147971 - Devil_Spawn - Mon Dec 31, 2007 10:20 am

#148242 - Sweater Fish Deluxe - Thu Jan 03, 2008 9:45 pm

#148290 - Jim e - Fri Jan 04, 2008 11:45 am

#148310 - pas - Fri Jan 04, 2008 3:48 pm

#148314 - 0xtob - Fri Jan 04, 2008 4:01 pm

#148317 - lolmasta - Fri Jan 04, 2008 4:09 pm

#148321 - jay001 - Fri Jan 04, 2008 4:18 pm

#148325 - pas - Fri Jan 04, 2008 4:26 pm

#148329 - jay001 - Fri Jan 04, 2008 4:41 pm

#148332 - 0xtob - Fri Jan 04, 2008 5:08 pm

#148334 - sekazi - Fri Jan 04, 2008 5:18 pm

#148337 - sllide - Fri Jan 04, 2008 5:55 pm

#148340 - pas - Fri Jan 04, 2008 6:58 pm

#148349 - sekazi - Fri Jan 04, 2008 8:37 pm

#148350 - KeithE - Fri Jan 04, 2008 8:47 pm

#148352 - damnet - Fri Jan 04, 2008 9:59 pm

#148402 - Jim e - Sat Jan 05, 2008 1:07 pm

#148403 - Ferrie - Sat Jan 05, 2008 1:09 pm

#148418 - pas - Sat Jan 05, 2008 3:33 pm

#148428 - jay001 - Sat Jan 05, 2008 4:29 pm

#148432 - Ferrie - Sat Jan 05, 2008 5:47 pm

#148436 - eric b - Sat Jan 05, 2008 6:26 pm

#148439 - sekazi - Sat Jan 05, 2008 7:50 pm

#148443 - Rocky5 - Sat Jan 05, 2008 8:31 pm

#148449 - Ferrie - Sat Jan 05, 2008 10:08 pm

#148453 - Rocky5 - Sat Jan 05, 2008 11:30 pm

#148455 - pas - Sun Jan 06, 2008 12:10 am

#148456 - CurlyCarlos - Sun Jan 06, 2008 12:37 am

#148475 - Jim e - Sun Jan 06, 2008 5:28 am

#148485 - Devil_Spawn - Sun Jan 06, 2008 10:19 am

#148495 - sllide - Sun Jan 06, 2008 11:57 am

#148511 - pas - Sun Jan 06, 2008 4:59 pm

#148632 - gundark - Tue Jan 08, 2008 1:50 am

#148652 - OSW - Tue Jan 08, 2008 8:27 am

#148656 - gundark - Tue Jan 08, 2008 11:11 am

#148659 - pas - Tue Jan 08, 2008 1:31 pm

#148768 - Rocky5 - Thu Jan 10, 2008 2:23 am

#148777 - OSW - Thu Jan 10, 2008 5:42 am

#148787 - woodbin - Thu Jan 10, 2008 7:13 am

#148792 - Jim e - Thu Jan 10, 2008 8:57 am

#148799 - svenhenrik - Thu Jan 10, 2008 11:49 am

#148804 - pas - Thu Jan 10, 2008 1:38 pm

#149086 - 0xtob - Tue Jan 15, 2008 1:44 am

#149106 - pas - Tue Jan 15, 2008 2:39 pm

#149113 - 0xtob - Tue Jan 15, 2008 4:15 pm

#149132 - TheYak - Tue Jan 15, 2008 8:30 pm

#149137 - pas - Tue Jan 15, 2008 10:04 pm

#149233 - Sweater Fish Deluxe - Thu Jan 17, 2008 12:59 am

#149234 - 0xtob - Thu Jan 17, 2008 1:13 am

#149261 - svenhenrik - Thu Jan 17, 2008 11:54 am

#149268 - Jim e - Thu Jan 17, 2008 3:44 pm

#149295 - 0xtob - Fri Jan 18, 2008 12:12 am

#149297 - MechaBouncer - Fri Jan 18, 2008 12:45 am

#149336 - Rocky5 - Fri Jan 18, 2008 5:22 pm

#147597 - HBK - Mon Dec 24, 2007 4:07 am