The NSMB Hacking Domain » Sprite Collision

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ray

Posted on 10-02-11, 08:37 pm

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ID: 4705
+0

Roy Koopa

Karma: 4036
Posts: 743/2722
Since: 06-26-11

Yeah, like the titels says, I want to know, how I can create Sprite Collision. I tried now many things and also USED GOOGLE, but couldnt find anything. Only something about OBJSHAPE_TALL/WIDE -> Dont understand. I spent now 3 hours for trying

So how can I create collision?
Hope for help

_________________________

See a lots of creative DS Hacking here
If you want to support me, you might check out my Patreon Page : )

Freeze	Posted on 10-03-11, 08:25 am Hi. Link ID: 4713 +0
Karma: 3782 Posts: 469/2112 Since: 06-28-11	I am not good in C, but I probably know the algorithm. You write the coordinates of the different sprites into variables. Everytime the sprites are moving, you overwrite the old coordinates in the variables with the newer ones. And everytime the sprites are moving, you also compare the values inside the variables. If the values in the two variables are the same, do the image of the collision.

ray	Posted on 10-03-11, 08:28 am Hi. Link ID: 4714 +0
Roy Koopa Karma: 4036 Posts: 746/2722 Since: 06-26-11	Yeah, I know how to make collision, because I already created a Jump'n run in Pascal, but I dont know how to get the Top/Left from sprites in C++ for DS And I tried with the coordinates, but then, I can only stand on ONE Pixel xD _________________________ See a lots of creative DS Hacking here If you want to support me, you might check out my Patreon Page : )

Nadia	Posted on 10-03-11, 01:16 pm Hi. Link ID: 4716 +0
Axew Karma: 673 Posts: 61/583 Since: 07-02-11	Check if it's in the range of the sprite's position AND the sprite's position plus its width.

ray	Posted on 10-03-11, 01:28 pm Hi. Link ID: 4717 +0
Roy Koopa Karma: 4036 Posts: 747/2722 Since: 06-26-11	Thats the problem. I dont know how to check th width In Pascal its sooo easy ("ImageName".Width) But how does it work in DS Dev? _________________________ See a lots of creative DS Hacking here If you want to support me, you might check out my Patreon Page : )

Dirbaio	Posted on 10-03-11, 02:48 pm Hi. Link ID: 4718 +0
Super Mario ( ͡° ͜ʖ ͡°) Karma: 10202 Posts: 944/4459 Since: 06-08-11	Hmm those sprites are 16x16, so the width and height is 16. Easy.

ray

Posted on 10-03-11, 02:57 pm (rev. 1)

Link
ID: 4719
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Roy Koopa

Karma: 4036
Posts: 748/2722
Since: 06-26-11

Uhm... yes... But that doesnt help...
Here's what I've written yesterday:

I know thats fail, but I dont know another way

_________________________

See a lots of creative DS Hacking here
If you want to support me, you might check out my Patreon Page : )

Dirbaio	Posted on 10-03-11, 02:59 pm (rev. 1) Hi. Link ID: 4720 +0
Super Mario ( ͡° ͜ʖ ͡°) Karma: 10202 Posts: 945/4459 Since: 06-08-11	You could do if(PlX >= Spr1X && PlX <= Spr1X+16) if(PlY >= Spr1Y && PlY <= Spr1Y+16) falling = false;

ray	Posted on 10-03-11, 03:19 pm Hi. Link ID: 4721 +0
Roy Koopa Karma: 4036 Posts: 749/2722 Since: 06-26-11	I had to add "}/{" And then it worked a bit... I can now stand on Sprite2 not 1 And I'll stop falling if I'm on the X coordinates. Doesnt matter if in the air or on the block _________________________ See a lots of creative DS Hacking here If you want to support me, you might check out my Patreon Page : )

Dirbaio	Posted on 10-03-11, 03:22 pm Hi. Link ID: 4722 +0
Super Mario ( ͡° ͜ʖ ͡°) Karma: 10202 Posts: 946/4459 Since: 06-08-11	if(PlX >= Spr1X && PlX <= Spr1X+16) { if(PlY >= Spr1Y && PlY <= Spr1Y+16) { falling = false; } }

ray	Posted on 10-03-11, 04:09 pm Hi. Link ID: 4723 +0
Roy Koopa Karma: 4036 Posts: 750/2722 Since: 06-26-11	Yeah, thats what I added ... <_< _________________________ See a lots of creative DS Hacking here If you want to support me, you might check out my Patreon Page : )

Dirbaio	Posted on 10-03-11, 04:10 pm Hi. Link ID: 4724 +0
Super Mario ( ͡° ͜ʖ ͡°) Karma: 10202 Posts: 947/4459 Since: 06-08-11	Then you're doing something else wrong....

ray

Posted on 10-03-11, 04:13 pm

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ID: 4725
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Roy Koopa

Karma: 4036
Posts: 751/2722
Since: 06-26-11

Does the source help?

#include <nds.h>

#include "TitleBottom.h"
#include "TitleTop.h"
#include "Block1.h"
#include "Block2.h"
#include "Block3.h"
#include "PlayerR.h"
#include "PlayerL.h"

int count;
int e = 0;
int Spr1X,Spr2X,Spr1Y,Spr2Y,Spr3X,Spr3Y,PlX,PlY;
int FallSpeed = 0;
bool falling = false;

void timer()
{
	    scanKeys();
		int held = keysHeld();
 
		if( held & KEY_LEFT)
		PlX = PlX -1;
 
		if( held & KEY_RIGHT)
		PlX = PlX +1;
		
		int i;
		
		if( held & KEY_UP)
		{
		  for (i = 0; i < 16; i++)
		  {
		   PlY = PlY -1;
		  }
		}
		
		if (PlY == 256)
		{
		PlY = 0;
		}
			
        if(PlX >= Spr1X && PlX <= Spr1X+16)
         {
           if(PlY >= Spr1Y && PlY <= Spr1Y+16)
            {
             falling = false;
            }
         }
		else
		{
		  falling = true;
		  PlY = PlY +FallSpeed;
		  if (FallSpeed == 10)
		  {
		  
		  }
		  else
		  {
		    FallSpeed = FallSpeed +1;
		  }
		}
		
}


int main(void)
{

   	vramSetBankA(VRAM_A_MAIN_BG_0x06000000);

        int bg = bgInit(3, BgType_Bmp8, BgSize_B8_256x256, 0,0);

        dmaCopy(TitleTopBitmap, bgGetGfxPtr(bg), 256*256);
        dmaCopy(TitleTopPal, BG_PALETTE, 256*2);
  
  
    videoSetModeSub(MODE_5_2D);
   	vramSetBankC(VRAM_C_SUB_BG_0x06200000);

        int bg3 = bgInitSub(3, BgType_Bmp8, BgSize_B8_256x256, 0,0);

        dmaCopy(TitleBottomBitmap, bgGetGfxPtr(bg3), 256*256);
        dmaCopy(TitleBottomPal, BG_PALETTE_SUB, 256*2);


  videoSetMode(MODE_5_2D);
  vramSetBankF(VRAM_F_MAIN_SPRITE);
  oamInit(&oamMain,SpriteMapping_1D_32,true);
  vramSetBankF(VRAM_F_LCD);
  
  int i;
  
  for (i=0;i<Block1PalLen;i++)
  VRAM_F_EXT_SPR_PALETTE[0][i] = Block1Pal[i];
  for (i=0;i<=Block2PalLen;i++)
  VRAM_F_EXT_SPR_PALETTE[1][i] = Block2Pal[i];
  for (i=0;i<=Block3PalLen;i++)
  VRAM_F_EXT_SPR_PALETTE[2][i] = Block3Pal[i];
  for (i=0;i<=PlayerRPalLen;i++)
  VRAM_F_EXT_SPR_PALETTE[3][i] = PlayerRPal[i];
  for (i=0;i<=PlayerRPalLen;i++)
  VRAM_F_EXT_SPR_PALETTE[4][i] = PlayerLPal[i];
	
  vramSetBankF(VRAM_F_SPRITE_EXT_PALETTE);
  
  u16* Block1 = oamAllocateGfx(&oamMain, SpriteSize_16x16, SpriteColorFormat_256Color);
  u16* Block2 = oamAllocateGfx(&oamMain, SpriteSize_16x16, SpriteColorFormat_256Color);
  u16* Block3 = oamAllocateGfx(&oamMain, SpriteSize_16x16, SpriteColorFormat_256Color);
  u16* PlayerR = oamAllocateGfx(&oamMain, SpriteSize_32x64, SpriteColorFormat_256Color);
  u16* PlayerL = oamAllocateGfx(&oamMain, SpriteSize_32x64, SpriteColorFormat_256Color);
  
  dmaCopy(Block1Tiles, Block1, Block1TilesLen);
  dmaCopy(Block2Tiles, Block2, Block2TilesLen);
  dmaCopy(Block3Tiles, Block3, Block3TilesLen);
  dmaCopy(PlayerRTiles, PlayerR, PlayerRTilesLen);
  dmaCopy(PlayerLTiles, PlayerL, PlayerLTilesLen);
  
  Spr1X = 32;
  Spr1Y = 128;
  Spr2X = 48;
  Spr2Y = 128;
  Spr3X = 64;
  Spr3Y = 128;
  PlX = 32;
  PlY = 64;
  
  timerStart(0, ClockDivider_256, TIMER_FREQ(490), timer);
  
  lcdMainOnBottom();
  
  while(1)
  {
    oamSet(&oamMain,
	        0, //SpriteNumber (0-127)
			Spr1X, Spr1Y, //Sprite X and Y variables)
			0, //Priority (0 render last)
			0, //Palete number if Multiple Paletes
			SpriteSize_16x16,
			SpriteColorFormat_256Color,
			Block1, //Pointer to the graphic
			-1, //Sprite rotation data
			false, //double the size when rotating?
			false, //hide the sprite?
			false, false, //vflip?, hflip?
			false //apply mosaic?
			);
	oamSet(&oamMain,
	        1,
			Spr2X, Spr2Y,
			0,
			1,
			SpriteSize_16x16,
			SpriteColorFormat_256Color,
			Block2,
			-1,
			false,
			false,
			false, false,
			false
			);
	oamSet(&oamMain,
	        2,
			Spr3X, Spr3Y,
			0,
			2,
			SpriteSize_16x16,
			SpriteColorFormat_256Color,
			Block3,
			-1,
			false,
			false,
			false, false,
			false
			);
	oamSet(&oamMain,
	        3,
			PlX, PlY,
			0,
			3,
			SpriteSize_32x64,
			SpriteColorFormat_256Color,
			PlayerR,
			-1,
			false,
			false,
			false, false,
			false
			);
			
			
	swiWaitForVBlank();
	oamUpdate(&oamMain);
   }
}

_________________________

See a lots of creative DS Hacking here
If you want to support me, you might check out my Patreon Page : )

coolas1

Posted on 10-05-11, 02:47 am (rev. 1)

Link
ID: 4745
+0

Porcupo
Did you win the game?

Karma: 226
Posts: 118/322
Since: 06-28-11

Well I'll upload a sprite colision file to the svn.

Here you are:

int spritecol(int fx,int fy,int sx,int sy,int fSizex,int fSizey,int sSizex,int sSizey){
	if ((fx + fSizex > sx )&& (fx < sx+sSizex) && (sy + sSizey > fy) && (sy < fy+fSizey)) 
		return 1;
	else 
		return 0;
	return 0;
}

For example to test whether sprite1 at a x of 1 and a y of 1 with a width of 16x16 colides with sprite2 at 5x and 8y which also has a width of 16x16:

if (spritecol(1,1,5,8,16,16,16,16)
falling=false;
else
falling=true;

I'm now uploading the function to svn...

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