#11709 - Stormcrow - Thu Oct 16, 2003 11:25 am
Hi, I'm kinda new to this forum so I hope this hasn't been asked before. I checked the present topics but I couldn't find anything so here goes:
I haven't found any rounding off functions. I could make one if I knew how to get the fraction part of a float, but i don't know that either. Does anyone know how to do that? And is there perhaps a mathematical reference available, because I have no idea what a lot of functions in math.h do.
Another question: How do I set the title of a program in the mutliboot screen?
Thanks for helping.
#11712 - poslundc - Thu Oct 16, 2003 3:47 pm
| Stormcrow wrote: |
Hi, I'm kinda new to this forum so I hope this hasn't been asked before. I checked the present topics but I couldn't find anything so here goes:
I haven't found any rounding off functions. I could make one if I knew how to get the fraction part of a float, but i don't know that either. Does anyone know how to do that? And is there perhaps a mathematical reference available, because I have no idea what a lot of functions in math.h do. |
Don't use floating point on the GBA. It is emulated in software and will be impossibly slow.
Learn how to do fixed-point arithmetic, then see this topic for instructions on how to round off fixed-point variables.
Sorry I can't help you out with your other queston, as I've never used multiboot.
Dan.
#11735 - Master S - Fri Oct 17, 2003 9:28 am
If you realy want to use use floats, it's real easy to round a float.
All you have to do is to add 0.5f before you store in a int
ex. 1.9 + 0.5 = 2.4 -> 2
1.4 + 0.5 = 1.9 -> 1
#11738 - Stormcrow - Fri Oct 17, 2003 4:21 pm
I totally forgot about that one. Indeed, just adding 0.5 before turning into an int works.
Thx!
Still, does anyone know how to change the title of a program shown at multiboot?
#11739 - niltsair - Fri Oct 17, 2003 4:50 pm
You need to either use a tool to edit the Rom Header or one of the file included for linking contain the name. (I think lnkscpt)
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#11741 - yaustar - Fri Oct 17, 2003 6:12 pm
use FATv8 is probably the easiest one to use
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