int main() {
//enable vram and map it to the right places
vramSetMainBanks( VRAM_A_MAIN_SPRITE, //A and B maped consecutivly as sprite memory
VRAM_B_MAIN_SPRITE, //this gives us 256KB which is the max
VRAM_C_MAIN_BG_0x06000000, //map C to background memory
VRAM_D_LCD //not using D
);
//set the video mode
videoSetMode( MODE_0_2D |
DISPLAY_SPR_ACTIVE | //turn on sprites
DISPLAY_BG0_ACTIVE | //turn on background 0
DISPLAY_SPR_1D | //this is used when in tile mode
DISPLAY_SPR_1D_BMP //and this in bitmap mode
);
consoleInit(0, 0,BgType_Text4bpp, BgSize_T_256x256, 31,0, true, true);
//turn off the sprites
initSprites();
// direct bitmap sprite
// print at using ansi escape sequence \x1b[line;columnH
iprintf("\x1b[1;1HDirect Bitmap:");
sprites[0].attribute[0] = ATTR0_BMP | ATTR0_ROTSCALE_DOUBLE | 10;
sprites[0].attribute[1] = ATTR1_SIZE_32 | 20;
sprites[0].attribute[2] = ATTR2_ALPHA(1)| 0;
// red 32*32 square for 1d bitmap mode
for(int i=0;i<32*32;i++)
SPRITE_GFX[i]=RGB15(31,0,0)|(1<<15); //dont forget alpha bit
// 256 color sprite
// print at using ansi escape sequence \x1b[line;columnH
iprintf("\x1b[9;1H256 color:");
sprites[1].attribute[0] = ATTR0_COLOR_256 | ATTR0_ROTSCALE_DOUBLE | 75;
sprites[1].attribute[1] = ATTR1_SIZE_32 | 20; // size 64x64, x 10
sprites[1].attribute[2] = 64;
// Blue for 256 color sprite
SPRITE_PALETTE[1]=RGB15(0,0,31);
// blue 64*64 square for 256 color mode (must write two pixles at time)
for(int i=0;i<32*16;i++)
SPRITE_GFX[i+64*16]=(1<<8)|1;
// 16 color sprite
// print at using ansi escape sequence \x1b[line;columnH
iprintf("\x1b[16;1H16 color:");
sprites[2].attribute[0] = ATTR0_COLOR_16 | ATTR0_ROTSCALE_DOUBLE | 135;
sprites[2].attribute[1] = ATTR1_SIZE_32 | 20;
sprites[2].attribute[2] = ATTR2_PALETTE(1) | 96;
//yellow for 16 color sprite (it is using palette 1 so colors 16-31)
SPRITE_PALETTE[17]=RGB15(31,31,0);
// yellow 32*32 square for 16 color mode (must write 4 pixels at a time)
for(int i=0;i<32*8;i++)
SPRITE_GFX[i+96*16]=(1<<12)|(1<<8)|(1<<4)|1;
int angle=0;
//we tied all our sprites to the same rotation attributes (0)
spriteRotations[0].hdx=256;
spriteRotations[0].hdy=0;
spriteRotations[0].vdx=0;
spriteRotations[0].vdy=256;
while(1)
{
angle+=64;
spriteRotations[0].hdx = cosLerp(angle) >> 4;
spriteRotations[0].hdy = sinLerp(angle) >> 4;
spriteRotations[0].vdx = -spriteRotations[0].hdy;
spriteRotations[0].vdy = spriteRotations[0].hdx;
swiWaitForVBlank();
u32 display_temp = 0;
scanKeys();
if(keysDown()&KEY_A) {
screenshotbmp("shot.bmp");
display_temp=REG_DISPCNT;
REG_DISPCNT=MODE_FB1;
}
if(keysUp()&KEY_A) {
videoSetMode( MODE_0_2D |
DISPLAY_SPR_ACTIVE | //turn on sprites
DISPLAY_BG0_ACTIVE | //turn on background 0
DISPLAY_SPR_1D | //this is used when in tile mode
DISPLAY_SPR_1D_BMP | //and this in bitmap mode
DCAP_OFFSET(1));
}
updateOAM();
}
}
int main()
{
irqInit();
SetMode((LCDC_BITS)(MODE_1 | BG0_ON | BG2_ON | OBJ_ENABLE));
irqSet(IRQ_VBLANK, vblank);
irqEnable(IRQ_VBLANK);
float xpos = 0;
float ypos = 0;
float xdir = 0;
float ydir = 0;
int dir = 0;
BG_COLORS[0] = RGB5(31, 0, 31);
CpuFastSet(tileset_img, OBJ_BASE_ADR, COPY32 | (256 * 16) / 4);
CpuFastSet(tileset_pal, OBJ_COLORS, COPY32 | (256 / 4));
CpuFastSet(tileset_img, PATRAM4(0, 0), COPY32 | (256 * 16) / 4);
CpuFastSet(tileset_pal, BG_COLORS, COPY32 | (256 / 4));
// mock up a map
/* ((vu16*)MAP_BASE_ADR(MAP_BASE_BLOCK))[0] = 0;
((vu16*)MAP_BASE_ADR(MAP_BASE_BLOCK))[1] = 1;
((vu16*)MAP_BASE_ADR(MAP_BASE_BLOCK))[32] = 32;
((vu16*)MAP_BASE_ADR(MAP_BASE_BLOCK))[33] = 33;
((vu16*)MAP_BASE_ADR(MAP_BASE_BLOCK))[64] = 64;
((vu16*)MAP_BASE_ADR(MAP_BASE_BLOCK))[65] = 65; */
for (int y = 0; y < 32; ++y)
{
for (int x = 0; x < 32; ++x)
{
((vu16*)MAP_BASE_ADR(MAP_BASE_BLOCK + 1))[x + y * 32] = 5;
}
}
for (int x = 0; x < 32; ++x) ((vu8*)MAP_BASE_ADR(MAP_BASE_BLOCK + 1))[x] = 16;
for (int x = 0; x < 32; ++x) ((vu8*)MAP_BASE_ADR(MAP_BASE_BLOCK + 1))[31 * 32 + x] = 16;
for (int y = 0; y < 32; ++y) ((vu8*)MAP_BASE_ADR(MAP_BASE_BLOCK + 1))[y * 32] = 16;
for (int y = 0; y < 32; ++y) ((vu8*)MAP_BASE_ADR(MAP_BASE_BLOCK + 1))[y * 32 + 31] = 16;
BGCTRL[0] = SCREEN_BASE(MAP_BASE_BLOCK + 0) | CHAR_BASE(0) | BG_SIZE_0 | BG_16_COLOR | BG_PRIORITY(1); // | CHAR_PALETTE(1);
BGCTRL[2] = SCREEN_BASE(MAP_BASE_BLOCK + 1) | CHAR_BASE(0) | BG_SIZE_1 | BG_16_COLOR | BG_PRIORITY(0); // | CHAR_PALETTE(1);
float rot = 0.0f;
float last_rot = rot;
float bg_scroll = 0;
int frame = 0;
while (1)
{
int sprite_frame = (int(floor(bg_scroll)) >> 3) & 1;
if (fabs(xdir) < 1e-1) sprite_frame = 0;
// if (ypos > 0) sprite_frame = 2;
int tile_start = sprite_frame * 2;
int pal = 0;
for (int i = 0; i < 128; ++i)
{
sprites[i].attr0 = ATTR0_DISABLED;
}
int sprite = 0;
// sprites[sprite].attr0 = OBJ_Y(int(ypos) + 80 - 8) | ATTR0_COLOR_16 | ATTR0_WIDE;
// sprites[sprite].attr1 = OBJ_X(int(xpos) + 120) | OBJ_SIZE(Sprite_16x8) | (dir ? ATTR1_FLIP_X : 0);
sprites[sprite].attr0 = OBJ_Y(int(0) + 80 - 16) | ATTR0_COLOR_16 | ATTR0_WIDE;
sprites[sprite].attr1 = OBJ_X(int(0) + 120 - 8) | OBJ_SIZE(Sprite_16x8) | (dir ? ATTR1_FLIP_X : 0);
sprites[sprite].attr2 = OBJ_CHAR(tile_start) | ATTR2_PALETTE(pal); // | OBJ_TRANSLUCENT;
sprite++;
// sprites[sprite].attr0 = OBJ_Y(int(ypos) + 80) | ATTR0_COLOR_16 | ATTR0_SQUARE;
// sprites[sprite].attr1 = OBJ_X(int(xpos) + 120) | OBJ_SIZE(Sprite_16x16) | (dir ? ATTR1_FLIP_X : 0);
sprites[sprite].attr0 = OBJ_Y(int(0) + 80 - 8) | ATTR0_COLOR_16 | ATTR0_SQUARE;
sprites[sprite].attr1 = OBJ_X(int(0) + 120 - 8) | OBJ_SIZE(Sprite_16x16) | (dir ? ATTR1_FLIP_X : 0);
sprites[sprite].attr2 = OBJ_CHAR(tile_start + 32) | ATTR2_PALETTE(pal); // | OBJ_TRANSLUCENT;
sprite++;
float st = sin(last_rot);
float ct = cos(last_rot);
last_rot = last_rot + (rot - last_rot) * 0.1;
int pa = int(0x100 * ct);
int pb =-int(0x100 * st);
int pc = int(0x100 * st);
int pd = int(0x100 * ct);
// don't setup any hw-regs until vblank
VBlankIntrWait();
// setup bg0 scroll
REG_BG0HOFS = int(bg_scroll) & 0xFFFF;
// setup bg2 transform
REG_BG2PA = pa;
REG_BG2PB = pb;
REG_BG2PC = pc;
REG_BG2PD = pd;
REG_BG2X = (int(xpos) << 8) - (pa * 120 + pb * 80);
REG_BG2Y = (int(ypos) << 8) - (pc * 120 + pd * 80);
++frame;
CpuSet(sprites, OAM, (128 * sizeof(OAM[0])) / 2);
scanKeys();
u32 held = keysHeld();
u32 down = keysDown();
u32 up = keysUp();
float upx = sin(rot);
float upy = -cos(rot);
float leftx = upy;
float lefty = -upx;
if (KEY_UP & down) { xdir = upx * 5; ydir = upy * 5; }
if (KEY_L & down) { rot += M_PI / 2; }
if (KEY_R & down) { rot -= M_PI / 2; }
/* if (KEY_L & up) { rot += M_PI / 4; }
if (KEY_R & up) { rot -= M_PI / 4; } */
// external forces
#if 0
xdir *= 0.95; // friction
ydir *= 0.95; // friction
#else
float a = leftx * xdir + lefty * ydir; // dot(dir, left)
float b = upx * xdir + upy * ydir; // dot(dir, up)
float new_xdir = upx * b + 0.85 * leftx * a;
float new_ydir = upy * b + 0.85 * lefty * a;
xdir = new_xdir;
ydir = new_ydir;
#endif
if (fabs(xdir) < 1e-1) xdir = 0;
if (fabs(ydir) < 1e-1) ydir = 0;
if (KEY_RIGHT & held) { xdir -= leftx * 0.5f; ydir -= lefty * 0.5f; dir = 0; }
if (KEY_LEFT & held) { xdir += leftx * 0.5f; ydir += lefty * 0.5f; dir = 1; }
xdir -= upx * 0.25; // gravity
ydir -= upy * 0.25; // gravity
float last_xpos = xpos;
float last_ypos = ypos;
// apply forces
xpos += xdir;
ypos += ydir;
// resolve constraints
if (xpos < 0) xpos = 0;
if (xpos > 255) xpos = 255;
if (ypos < 0) ypos = 0;
if (ypos > 255) ypos = 255;
float delta_xpos = last_xpos - xpos;
float delta_ypos = last_ypos - ypos;
bg_scroll += (delta_xpos * leftx + delta_ypos * lefty) * 0.5f;
}
return 0;
}
