//Copy Sprites to Shadow
void copyShadow()
{
int i;
for(i=0; i<NUMSPRITES; i++)
{
shadowOAM[i].attr0 = sprites[i].row | ATTR0_8BPP | sprites[i].shape;
shadowOAM[i].attr1 = sprites[i].col | sprites[i].size;
shadowOAM[i].attr2 = sprites[i].start | ATTR2_PALETTE_BANK(0);
}
}
//Sets Up Sprites
void initializeSprites()
{
int i;
// Load sprite palette
for(i=0; i<256; i++)
{
SPRITEPAL[i] = spritePalette[i];
}
// Load sprite images
for(i=0; i<64/2; i++)
{
CHARBLOCKBASE[4].tileimg[i] = spriteTiles[i];
}
for(i=0; i<NUMSPRITES; i++)
{
shadowOAM[i].attr0 = sprites[i].row | ATTR0_8BPP | sprites[i].shape;
shadowOAM[i].attr1 = sprites[i].col | sprites[i].size;
shadowOAM[i].attr2 = sprites[i].start | ATTR2_PALETTE_BANK(0);
}
//Hide Sprites
for(i=1; i<128; i++)
{
shadowOAM[i].attr0 = ATTR0_HIDE;
}
waitForVblank();
for(i=0; i<128; i++)
{
SPRITEMEM[i] = shadowOAM[i];
}
}
int main(void)
{
//Initializing Program variables
int i;
int visible = 1;
int press = 1;
int oldSprite = 0;
int currentSprite = 0;
ObjAttr shadowOAM[128];
REG_DISPCTL = MODE0 | BG0_ENABLE | OBJ_ENABLE;
// Load background palette
for(i=0; i<256; i++)
{
PALETTE[i] = backgroundPal[i];
}
// Load background tile images
for(i=0; i<backgroundTilesLen/2; i++)
{
CHARBLOCKBASE[0].tileimg[i] = backgroundTiles[i];
}
//Make Map
for(i=0; i<1024; i++)
{
SCREENBLOCKBASE[28].tilemap[i] = 1;
}
REG_BG0CNT = SBB(28) | CBB(0) | COLOR256 | BG_SIZE0;
//Define Sprites
Sprite sprites[NUMSPRITES] = {{16,16,SPRITEOFFSET16(0,0),ATTR0_SQUARE,ATTR1_SIZE32,32,32,1,1},
{0,0,SPRITEOFFSET16(0,8),ATTR0_SQUARE,ATTR1_SIZE32,32,32,1,1},
{0,0,SPRITEOFFSET16(0,16),ATTR0_SQUARE,ATTR1_SIZE32,32,32,1,1},
{5,100,SPRITEOFFSET16(0,24),ATTR0_SQUARE,ATTR1_SIZE32,32,32,1,1},
{0,0,SPRITEOFFSET16(4,0),ATTR0_SQUARE,ATTR1_SIZE32,32,32,1,1},
{0,0,SPRITEOFFSET16(4,8),ATTR0_SQUARE,ATTR1_SIZE32,32,32,1,1},
{0,0,SPRITEOFFSET16(4,16),ATTR0_SQUARE,ATTR1_SIZE32,32,32,1,1},
{0,0,SPRITEOFFSET16(4,16),ATTR0_SQUARE,ATTR1_SIZE32,32,32,1,1}};
// Load sprite palette
for(i=0; i<256; i++)
{
SPRITEPAL[i] = spritePalette[i];
}
// Load sprite images
for(i=0; i<8192/2; i++)
{
CHARBLOCKBASE[4].tileimg[i] = spriteTiles[i];
}
// Set attributes for all active sprites
for(i=0; i<NUMSPRITES; i++)
{
shadowOAM[i].attr0 = sprites[i].row | ATTR0_8BPP | sprites[i].shape;
shadowOAM[i].attr1 = sprites[i].col | sprites[i].size;
shadowOAM[i].attr2 = sprites[i].start | ATTR2_PALETTE_BANK(0);
}
//Hide Sprites
for(i=0; i<128; i++)
{
shadowOAM[i].attr0 = ATTR0_HIDE;
}
waitForVblank();
//Move Sprites to Mem
for(i=0; i<128; i++)
{
SPRITEMEM[i] = shadowOAM[i];
}
while(FOREVER)
{
//Check for Movement and change direction
if(KEY_DOWN_NOW(BUTTON_UP))
{
shadowOAM[currentSprite].attr0 = ATTR0_HIDE;
sprites[currentSprite].row -= sprites[currentSprite].rdel;
oldSprite = currentSprite;
currentSprite = 2;
sprites[currentSprite].col = sprites[oldSprite].col;
sprites[currentSprite].row = sprites[oldSprite].row;
}
if(KEY_DOWN_NOW(BUTTON_DOWN))
{
shadowOAM[currentSprite].attr0 = ATTR0_HIDE;
sprites[currentSprite].row += sprites[currentSprite].rdel;
oldSprite = currentSprite;
currentSprite = 0;
sprites[currentSprite].col = sprites[oldSprite].col;
sprites[currentSprite].row = sprites[oldSprite].row;
}
if(KEY_DOWN_NOW(BUTTON_LEFT))
{
shadowOAM[currentSprite].attr0 = ATTR0_HIDE;
sprites[currentSprite].col -= sprites[currentSprite].cdel;
oldSprite = currentSprite;
currentSprite = 6;
sprites[currentSprite].col = sprites[oldSprite].col;
sprites[currentSprite].row = sprites[oldSprite].row;
}
if(KEY_DOWN_NOW(BUTTON_RIGHT))
{
shadowOAM[currentSprite].attr0 = ATTR0_HIDE;
sprites[currentSprite].col += sprites[currentSprite].cdel;
oldSprite = currentSprite;
currentSprite = 5;
sprites[currentSprite].col = sprites[oldSprite].col;
sprites[currentSprite].row = sprites[oldSprite].row;
}
//Check for second sprites visibility
if(KEY_DOWN_NOW(BUTTON_START) && press)
{
if(visible)
visible = 0;
else
visible = 1;
waitForVblank();
press = 0;
}
if(!KEY_DOWN_NOW(BUTTON_START))
{
press = 1;
}
//Collision Detection
if(sprites[currentSprite].row < HEIGHTMIN)
{
sprites[currentSprite].row = HEIGHTMIN;
}
if(sprites[currentSprite].col < WIDTHMIN)
{
sprites[currentSprite].col = WIDTHMIN;
}
if(sprites[currentSprite].row + sprites[currentSprite].height > HEIGHTMAX)
{
sprites[currentSprite].row = HEIGHTMAX - sprites[currentSprite].height;
}
if(sprites[currentSprite].col + sprites[currentSprite].width > WIDTHMAX)
{
sprites[currentSprite].col = WIDTHMAX - sprites[currentSprite].width;
}
//Move Sprites to Memory
shadowOAM[currentSprite].attr0 = sprites[currentSprite].row | ATTR0_8BPP | sprites[currentSprite].shape;
shadowOAM[currentSprite].attr1 = (MASK&sprites[currentSprite].col) | sprites[currentSprite].size;
shadowOAM[currentSprite].attr2 = sprites[currentSprite].start | ATTR2_PALETTE_BANK(0);
if(visible)
{
shadowOAM[3].attr0 = sprites[3].row | ATTR0_8BPP | sprites[3].shape;
shadowOAM[3].attr1 = (MASK&sprites[3].col) | sprites[3].size;
shadowOAM[3].attr2 = sprites[3].start | ATTR2_PALETTE_BANK(0);
}
else
{
shadowOAM[3].attr0 = ATTR0_HIDE;
}
waitForVblank();
for(i=0; i<NUMSPRITES; i++)
{
SPRITEMEM[i] = shadowOAM[i];
}
}
return 0;
}
//=====================Main
int main(void) {
//Set Video Control
REG_DISPCNT = BG2_ENABLE | BG1_ENABLE | BG0_ENABLE | MODE_0 | OBJ_ENABLE;
//tells the Background 0 control register
//where the screen map is, the tiles, the color, and size0=256x256
//background 1 is the collision map
REG_BG0CNT= CBB(0) | SBB(8) | COLOR16 | BG_SIZE0;
REG_BG1CNT= CBB(2) | SBB(10) | COLOR16 | BG_SIZE2;
REG_BG2CNT= CBB(3) | SBB(12) | COLOR16 | BG_SIZE2;
//sets the BG's vertical and horz offsets to 0
REG_BG0HOFS=0;
REG_BG0VOFS=20;
REG_BG1HOFS=0;
REG_BG1VOFS=0;
REG_BG2HOFS=0;
REG_BG2VOFS=0;
int i;
int speed=3;
int hoff=0;
int voff=0;
//loads the picture pallet
//This is the same for all backgrounds
for(i=0;i<background0PalLen/2;i++)
PALETTE_MEM[i]=background0Pal[i];
//===========================================Sprites
ObjAttr shadowOAM[128];
//defining sprites with room for more
Sprite spriteArray[NUMSPRITES]={
{WALKINGROW, 16, SPRITEOFFSET16(0,0), ATTR0_TALL, ATTR1_SIZE64, 32, 64, TRUE}
}
typedef struct {
int printRow;
int printCol;
int arrayLocation;
int shape;
int size;
int height;
int width;
int active;
} Sprite;
//Loads sprite tiles
for(i=0; i<characterSpritesTilesLen/2; i++)
charbase[4].tileimg[i] = characterSpritesTiles[i];
//set attributes of the sprite in the duplicate mem
for(i=0; i<NUMSPRITES; i++)
{
shadowOAM[i].attr0 = spriteArray[i].row | ATTR0_4BPP | spriteArray[i].shape;
shadowOAM[i].attr1 = spriteArray[i].col | spriteArray[i].size;
shadowOAM[i].attr2 = spriteArray[i].start | ATTR2_PALETTE_BANK(0);
}
//hides all sprites except for main guy
for(i=0; i<128; i++)
{
if(!spriteArray[i].active)
shadowOAM[i].attr0 = ATTR0_HIDE;
}
waitForVblank();
// Copy shadow into real
for(i=0; i<128; i++)
{
SPRITEMEM[i] = shadowOAM[i];
}
while(1) {
//LOADS BACKGROUND 0
//loads all the tiles and collision map
for(i=0;i<background0TilesLen/2;i++)
charbase[3].tileimg[i]=background0Tiles[i];
//loads the map
for(i=0;i<background0MapLen/2;i++)
screenbase[12].tilemap[i]=background0Map[i];
//LOADS BACKGROUND 1
//loads all the tiles and collision map
for(i=0;i<background1TilesLen/2;i++)
charbase[2].tileimg[i]=background1Tiles[i];
//loads the map
for(i=0;i<background1MapLen/2;i++)
screenbase[10].tilemap[i]=background1Map[i];
//LOADS BACKGROUND 2
//loads all the tiles and collision map
for(i=0;i<background2TilesLen/2;i++)
charbase[0].tileimg[i]=background2Tiles[i];
//loads the map
for(i=0;i<background2MapLen/2;i++)
screenbase[8].tilemap[i]=background2Map[i];
// these keys move the background around the screen
if(KEY_DOWN_NOW(BUTTON_RIGHT))hoff+=speed;
if(KEY_DOWN_NOW(BUTTON_LEFT))hoff-=speed;
if(KEY_DOWN_NOW(BUTTON_UP))voff-=speed;
if(KEY_DOWN_NOW(BUTTON_DOWN))voff+=speed;
REG_BG0HOFS=hoff;
//REG_BG0VOFS=voff;
REG_BG1HOFS=hoff/20;
//REG_BG1VOFS=voff/20;
waitForVBlank();
}
return 0;
}
