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heyho
i have a problem with my spacestation. i am programming with palib. have a large background and my ship-sprite with what i am flying through space. the station has to be far away, but the limits for the sprite-positions are 511 for x and 255 for y. after those the sprite appears again.
any idea how to solve that problem?
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Add an intermediate step for your sprite positioning. Instead of directly passing the X/Y into the OAM struct, first check to see if it is "off screen" If so, don't display (copy) it.

yep, that?s a good idea.
so i did now following thing:

Code:

typedef struct{
int x;
int y;
}station;
station rs;

rs.x=400;
rs.y=96;

void erscheine(void){
if ((rs.x<scrollx)&&(rs.y<scrolly)){
PA_CreateSprite(0, 2,(void*)station01_Sprite, OBJ_SIZE_64X64,1, 1, rs.x-16, rs.y-16);
}
}

If I?m arriving the point of creating the sprite, it will be created, but the function wants to create it now in each frame, so i get an error.
_________________
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Hoere nie auf anzufangen

yep, that is a good idea.
so i did now following thing:

Code:

typedef struct{
int x;
int y;
}station;
station rs;

rs.x=400;
rs.y=96;

void erscheine(void){
if ((rs.x<scrollx)&&(rs.y<scrolly)){
PA_CreateSprite(0, 2,(void*)station01_Sprite, OBJ_SIZE_64X64,1, 1, rs.x-16, rs.y-16);
}
}

If I am arriving the point of creating the sprite, it will be created, but the function wants to create it now in each frame, so i get an error.
_________________
Fange nie an aufzuhoeren
Hoere nie auf anzufangen

Hey friends.
After moving into a new house i find time again for continuing what i begun.
The problems with my limits are away.

Now my ship is flying through the orbit. When it is close to a space-station i want an "options" window to appear. in this option window i wanna have the possibility to create or buy a new station. But after hours of thinking i don?t come to an end with how to do this in C.
I would be thankfull of any idea.

Here?s my code till now:

Code:

// Includes
#include <PA9.h>
#include "gfx/all_gfx.c"
#include "gfx/all_gfx.h"

int main(int argc, char ** argv)
{
PA_Init();
PA_InitVBL();
PA_EasyBgLoad(0, 1, aa);
PA_InitText(1,0);
PA_LoadSpritePal(0, 0, (void*)vaisseau_Pal);
PA_LoadSpritePal(0, 1, (void*)station01_Pal);
PA_CreateSprite(0, 0,(void*)vaisseau_Sprite, OBJ_SIZE_32X32,1, 0, 128-16, 96-16); // Das SChiff auf Mitte des unteren Screens setzen

PA_SetSpriteRotEnable(0,0,0);
u16 angle = 0;
int x = (128) << 8;
int y = (96) << 8;
int sx;
int sy;

typedef struct{
int x;
int xmax;
int schalter;
}pflanze;

pflanze buche;

buche.xmax=1000;
buche.schalter=0;

int scrollx = 0;
int scrolly = 0;

//Raumstation:
/////////////////////////////////////////////////
typedef struct{
int x;
int y;
int flag;
int entfx;
int entfy;
}station;
station rs;
//station fremd[10];//0-9
rs.x=200;
rs.y=96;
rs.flag=0;
rs.entfx;
rs.entfy;
void station01test(void){
rs.entfx=(sx>>8)-(rs.x);//Entfernung zwischen Station und Raumschiff messen
   if (rs.entfx<0){rs.entfx=-rs.entfx;}//Betrag, falls Entfernung negativ!
rs.entfy=(sy>>8)-(rs.y);
   if (rs.entfy<0){rs.entfy=-rs.entfy;}

if (rs.flag==0){
   PA_CreateSprite(0, 2,(void*)station01_Sprite, OBJ_SIZE_64X64,1, 1, rs.x-16, rs.y-16);
   rs.flag=1;
}

if ((rs.entfx>100)&&rs.flag==1){
   PA_DeleteSprite (0, 2);
   rs.flag=0;
}

if ((rs.entfy>100)&&rs.flag==1){
   PA_DeleteSprite (0, 2);
   rs.flag=0;
}

if ((rs.entfx<30)&&(rs.entfy<30)){
   PA_OutputText(1,0,2,"'START' zum Landen-");
}
if ((rs.entfx>30)||(rs.entfy>30)){
   PA_OutputText(1,0,2," ");
}

}

//Einfacher test:
/////////////////////////////////////////////////
void wachse(void){
if (buche.schalter==1)
   if(buche.x<buche.xmax)
   buche.x++;
   if(buche.x==buche.xmax)
   buche.x=buche.xmax;

}

//STATUSBILDSCHIRM
//////////////////////////////////////////////////////////////////
void statusscreen(void){

   //Ausgabe von Informationen auf oberen Screen:
   ////////////////////////////////////////////////////////////////////////////////

   PA_OutputText(1,0,12,"Map-x: %02d", scrollx>>8);
   PA_OutputText(1,0,13,"Map-y: %02d", scrolly>>8);
   PA_OutputText(1,0,14,"-------------------");
   PA_OutputText(1,0,15,"Schiff-x: %02d", sx>>8);
   PA_OutputText(1,0,16,"Schiff-y: %02d", sy>>8);
   PA_OutputText(1,0,17,"-------------------");
   PA_OutputText(1,0,18,"x von Station entfernt: %02d", rs.entfx);
   PA_OutputText(1,0,19,"y von Station entfernt: %02d", rs.entfy);
   PA_OutputText(1,0,20,"Winkel des Schiffes: %02d", angle);

}

//MAIN:
////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
while (1)
{
   //Test-Buche: z?hlt von 0 bis 1000, wenn "A" gedr?ckt wird
   if (Pad.Newpress.A) buche.schalter=1;
   wachse();
   PA_OutputText(1,0,0,"%02d", buche.x);


   //Winkelberechnung-Flugschiff:
   ///////////////////////////////////////////////////////////////////////////////
   angle = PA_GetAngle(x>>8, y>>8, Stylus.X, Stylus.Y); //
   PA_SetRotsetNoZoom(0, 0, angle); // ?nderung des Schiffswinkels          //
   //Flugschiff-Koordinaten AUSSERHALB DER ENGINE:
   sx=(scrollx+x);
   sy=(scrolly+y);

   //Hintergrund-Scrolling:
   //////////////////////////////////////////////////////////////////////////////
   if(Pad.Held.B){                                              //
      scrollx += PA_Cos(angle);                                  //
      scrolly += PA_Sin(angle);
   };
   //Map-Grenzen:                                              //
   if((scrollx>>8)>(2560-255)){
      scrollx=590080;
   };
   if((scrollx>>8)<0){
      scrollx=0;
   };
   if((-scrolly>>8)>(1600-191)){
      scrolly=-360704;
   };
   if((-scrolly>>8)<0){
      scrolly=0;
   };
   //Set-Map:
   PA_LargeScrollXY(0, 1, scrollx>>8, -scrolly>>8);

   statusscreen();

   PA_SetSpriteXY(0, 0, (x>>8)-16, (y>>8)-16);
   PA_SetSpriteXY(0, 2, ((rs.x-16)+(-scrollx>>8))-16, ((rs.y-16)+(scrolly>>8))-16);
   station01test();
   PA_WaitForVBL();
}

return 0;

}

_________________
Fange nie an aufzuhoeren
Hoere nie auf anzufangen

Hey friends.
After moving into a new house i find time again for continuing what i begun.
The problems with my limits are away.

Now my ship is flying through the orbit. When it is close to a space-station i want an "options" window to appear. in this option window i wanna have the possibility to create or buy a new station. But after hours of thinking i don?t come to an end with how to do this in C.
I would be thankfull of any idea.

Here?s my code till now:

Code:

#include <PA9.h>
#include "gfx/all_gfx.c"
#include "gfx/all_gfx.h"

int main(int argc, char ** argv)
{
PA_Init();
PA_InitVBL();
PA_EasyBgLoad(0, 1, aa);
PA_InitText(1,0);
PA_LoadSpritePal(0, 0, (void*)vaisseau_Pal);
PA_LoadSpritePal(0, 1, (void*)station01_Pal);
PA_CreateSprite(0, 0,(void*)vaisseau_Sprite, OBJ_SIZE_32X32,1, 0, 128-16, 96-16); // Das SChiff auf Mitte des unteren Screens setzen

PA_SetSpriteRotEnable(0,0,0);
u16 angle = 0;
int x = (128) << 8;
int y = (96) << 8;
int sx;
int sy;

typedef struct{
int x;
int xmax;
int schalter;
}pflanze;

pflanze buche;

buche.xmax=1000;
buche.schalter=0;

int scrollx = 0;
int scrolly = 0;

//Raumstation:
/////////////////////////////////////////////////
typedef struct{
int x;
int y;
int flag;
int entfx;
int entfy;
}station;
station rs;
//station fremd[10];//0-9
rs.x=200;
rs.y=96;
rs.flag=0;
rs.entfx;
rs.entfy;
void station01test(void){
rs.entfx=(sx>>8)-(rs.x);//Entfernung zwischen Station und Raumschiff messen
   if (rs.entfx<0){rs.entfx=-rs.entfx;}//Betrag, falls Entfernung negativ!
rs.entfy=(sy>>8)-(rs.y);
   if (rs.entfy<0){rs.entfy=-rs.entfy;}

if (rs.flag==0){
   PA_CreateSprite(0, 2,(void*)station01_Sprite, OBJ_SIZE_64X64,1, 1, rs.x-16, rs.y-16);
   rs.flag=1;
}

if ((rs.entfx>100)&&rs.flag==1){
   PA_DeleteSprite (0, 2);
   rs.flag=0;
}

if ((rs.entfy>100)&&rs.flag==1){
   PA_DeleteSprite (0, 2);
   rs.flag=0;
}

if ((rs.entfx<30)&&(rs.entfy<30)){
   PA_OutputText(1,0,2,"'START' zum Landen-");
}
if ((rs.entfx>30)||(rs.entfy>30)){
   PA_OutputText(1,0,2," ");
}

}

//Einfacher test:
/////////////////////////////////////////////////
void wachse(void){
if (buche.schalter==1)
   if(buche.x<buche.xmax)
   buche.x++;
   if(buche.x==buche.xmax)
   buche.x=buche.xmax;

}

//STATUSBILDSCHIRM
//////////////////////////////////////////////////////////////////
void statusscreen(void){

   //Ausgabe von Informationen auf oberen Screen:
   ////////////////////////////////////////////////////////////////////////////////

   PA_OutputText(1,0,12,"Map-x: %02d", scrollx>>8);
   PA_OutputText(1,0,13,"Map-y: %02d", scrolly>>8);
   PA_OutputText(1,0,14,"-------------------");
   PA_OutputText(1,0,15,"Schiff-x: %02d", sx>>8);
   PA_OutputText(1,0,16,"Schiff-y: %02d", sy>>8);
   PA_OutputText(1,0,17,"-------------------");
   PA_OutputText(1,0,18,"x von Station entfernt: %02d", rs.entfx);
   PA_OutputText(1,0,19,"y von Station entfernt: %02d", rs.entfy);
   PA_OutputText(1,0,20,"Winkel des Schiffes: %02d", angle);

}

//MAIN:
////////////////////////////////////////////////////////////////////////////////
///////////////////////////////////////////////////////////////////////////////
while (1)
{
   //Test-Buche: z?hlt von 0 bis 1000, wenn "A" gedr?ckt wird
   if (Pad.Newpress.A) buche.schalter=1;
   wachse();
   PA_OutputText(1,0,0,"%02d", buche.x);


   //Winkelberechnung-Flugschiff:
   ///////////////////////////////////////////////////////////////////////////////
   angle = PA_GetAngle(x>>8, y>>8, Stylus.X, Stylus.Y); //
   PA_SetRotsetNoZoom(0, 0, angle); // ?nderung des Schiffswinkels          //
   //Flugschiff-Koordinaten AUSSERHALB DER ENGINE:
   sx=(scrollx+x);
   sy=(scrolly+y);

   //Hintergrund-Scrolling:
   //////////////////////////////////////////////////////////////////////////////
   if(Pad.Held.B){                                              //
      scrollx += PA_Cos(angle);                                  //
      scrolly += PA_Sin(angle);
   };
   //Map-Grenzen:                                              //
   if((scrollx>>8)>(2560-255)){
      scrollx=590080;
   };
   if((scrollx>>8)<0){
      scrollx=0;
   };
   if((-scrolly>>8)>(1600-191)){
      scrolly=-360704;
   };
   if((-scrolly>>8)<0){
      scrolly=0;
   };
   //Set-Map:
   PA_LargeScrollXY(0, 1, scrollx>>8, -scrolly>>8);

   statusscreen();

   PA_SetSpriteXY(0, 0, (x>>8)-16, (y>>8)-16);
   PA_SetSpriteXY(0, 2, ((rs.x-16)+(-scrollx>>8))-16, ((rs.y-16)+(scrolly>>8))-16);
   station01test();
   PA_WaitForVBL();
}

return 0;

}

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gbadev.org forum archive

DS development > x/y - limits

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