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program gxsprites;
{$J+}
{$macro on}
{$mode objfpc}
uses
cmem, ctypes, gccore;
{$include inc/textures.tpl.inc}
{$link build/textures.tpl.o}
const
ballsprites = 0;
const
DEFAULT_FIFO_SIZE = (256 * 1024);
const
RAND_MAX = 2147483647;
var
frameBuffer: array [0..1] of pcuint32 = (nil, nil);
rmode: PGXRModeObj = nil;
const
NUM_SPRITES = 1024;
//simple sprite struct
type
TSprite = record
x, y: cint; // screen co-ordinates
dx, dy: cint; // velocity
image: cint;
end;
var
sprites: array [0..NUM_SPRITES - 1] of TSprite;
texObj: GXTexObj;
fb: cuint32; // initial framebuffer index
first_frame: cuint32;
yscale: f32;
xfbHeight: cuint32;
perspective: Mtx44;
GXmodelView2D: Mtx;
gp_fifo: pointer = nil;
background: GXColor = (r: 0; g: 0; b: 0; a: $ff; );
i: cint;
spriteTPL: TPLFile;
texCoords: array[0..31] of f32 = (
0.0, 0.0, 0.5, 0.0, 0.5, 0.5, 0.0, 0.5,
0.5, 0.0, 1.0, 0.0, 1.0, 0.5, 0.5, 0.5,
0.0, 0.5, 0.5, 0.5, 0.5, 1.0, 0.0, 1.0,
0.5, 0.5, 1.0, 0.5, 1.0, 1.0, 0.5, 1.0);
procedure drawSpriteTex(x, y, Width, Height, image: cint);
var
texIndex: cint;
begin
texIndex := image * 8;
GX_Begin(GX_QUADS, GX_VTXFMT0, 4); // Draw A Quad
GX_Position2f32(x, y); // Top Left
GX_TexCoord2f32(texCoords[texIndex], texCoords[texIndex + 1]);
texIndex := texIndex + 2;
GX_Position2f32(x + Width - 1, y); // Top Right
GX_TexCoord2f32(texCoords[texIndex], texCoords[texIndex + 1]);
texIndex := texIndex + 2;
GX_Position2f32(x + Width - 1, y + Height - 1); // Bottom Right
GX_TexCoord2f32(texCoords[texIndex], texCoords[texIndex + 1]);
texIndex := texIndex + 2;
GX_Position2f32(x, y + Height - 1); // Bottom Left
GX_TexCoord2f32(texCoords[texIndex], texCoords[texIndex + 1]);
GX_End(); // Done Drawing The Quad
end;
begin
VIDEO_Init();
rmode := VIDEO_GetPreferredMode(nil);
fb := 0;
first_frame := 1;
// allocate 2 framebuffers for double buffering
frameBuffer[0] := (SYS_AllocateFramebuffer(rmode));
frameBuffer[1] := (SYS_AllocateFramebuffer(rmode));
VIDEO_Configure(rmode);
VIDEO_SetNextFramebuffer(frameBuffer[fb]);
VIDEO_SetBlack(False);
VIDEO_Flush();
VIDEO_WaitVSync();
if (rmode^.viTVMode and VI_NON_INTERLACE) <> 0 then
VIDEO_WaitVSync();
// setup the fifo and then init the flipper
gp_fifo := memalign(32, DEFAULT_FIFO_SIZE);
memset(gp_fifo, 0, DEFAULT_FIFO_SIZE);
fb := fb xor 1;
GX_Init(gp_fifo, DEFAULT_FIFO_SIZE);
// clears the bg to color and clears the z buffer
GX_SetCopyClear(background, $00ffffff);
// other gx setup
GX_SetViewport(0, 0, rmode^.fbWidth, rmode^.efbHeight, 0, 1);
yscale := GX_GetYScaleFactor(rmode^.efbHeight, rmode^.xfbHeight);
xfbHeight := GX_SetDispCopyYScale(yscale);
GX_SetScissor(0, 0, rmode^.fbWidth, rmode^.efbHeight);
GX_SetDispCopySrc(0, 0, rmode^.fbWidth, rmode^.efbHeight);
GX_SetDispCopyDst(rmode^.fbWidth, xfbHeight);
GX_SetCopyFilter(rmode^.aa, rmode^.sample_pattern, GX_TRUE, rmode^.vfilter);
if rmode^.viHeight = 2 * rmode^.xfbHeight then
GX_SetFieldMode(rmode^.field_rendering, GX_ENABLE)
else
GX_SetFieldMode(rmode^.field_rendering, GX_DISABLE);
if (rmode^.aa) <> 0 then
GX_SetPixelFmt(GX_PF_RGB565_Z16, GX_ZC_LINEAR)
else
GX_SetPixelFmt(GX_PF_RGB8_Z24, GX_ZC_LINEAR);
GX_SetCullMode(GX_CULL_NONE);
GX_CopyDisp(frameBuffer[fb], GX_TRUE);
GX_SetDispCopyGamma(GX_GM_1_0);
// setup the vertex descriptor
// tells the flipper to expect direct data
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_POS, GX_POS_XY, GX_F32, 0);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_TEX0, GX_TEX_ST, GX_F32, 0);
GX_SetNumChans(1);
GX_SetNumTexGens(1);
GX_SetTevOp(GX_TEVSTAGE0, GX_REPLACE);
GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLOR0A0);
GX_SetTexCoordGen(GX_TEXCOORD0, GX_TG_MTX2x4, GX_TG_TEX0, GX_IDENTITY);
GX_InvalidateTexAll();
TPL_OpenTPLFromMemory(@spriteTPL, @textures_tpl, textures_tpl_size);
TPL_GetTexture(@spriteTPL, ballsprites, @texObj);
GX_LoadTexObj(@texObj, GX_TEXMAP0);
guOrtho(perspective, 0, 479, 0, 639, 0, 300);
GX_LoadProjectionMtx(perspective, GX_ORTHOGRAPHIC);
WPAD_Init();
randomize();
for i := 0 to NUM_SPRITES - 1 do
begin
//random place and speed
sprites[i].x := random(640 - 32 + 1) shl 8;
sprites[i].y := random(480 - 32 + 1) shl 8;
sprites[i].dx := random($FF + 1) + $100;
sprites[i].dy := random($FF + 1) + $100;
sprites[i].image := random(4);
if random(2) <> 0 then
sprites[i].dx := -sprites[i].dx;
if random(2) <> 0 then
sprites[i].dy := -sprites[i].dy;
end;
while True do
begin
WPAD_ScanPads();
if (WPAD_ButtonsDown(0) and WPAD_BUTTON_HOME) <> 0 then
exit;
GX_SetViewport(0, 0, rmode^.fbWidth, rmode^.efbHeight, 0, 1);
GX_InvVtxCache();
GX_InvalidateTexAll();
GX_ClearVtxDesc();
GX_SetVtxDesc(GX_VA_POS, GX_DIRECT);
GX_SetVtxDesc(GX_VA_TEX0, GX_DIRECT);
guMtxIdentity(GXmodelView2D);
guMtxTransApply(GXmodelView2D, GXmodelView2D, 0.0, 0.0, -5.0);
GX_LoadPosMtxImm(GXmodelView2D, GX_PNMTX0);
for i := 0 to NUM_SPRITES - 1 do
begin
sprites[i].x := sprites[i].x + sprites[i].dx;
sprites[i].y := sprites[i].y + sprites[i].dy;
//check for collision with the screen boundaries
if (sprites[i].x < (1 shl 8)) or (sprites[i].x > ((640 - 32) shl 8)) then
sprites[i].dx := -sprites[i].dx;
if (sprites[i].y < (1 shl 8)) or (sprites[i].y > ((480 - 32) shl 8)) then
sprites[i].dy := -sprites[i].dy;
drawSpriteTex(sprites[i].x shr 8, sprites[i].y shr 8, 32, 32, sprites[i].image);
end;
GX_DrawDone();
GX_SetZMode(GX_TRUE, GX_LEQUAL, GX_TRUE);
GX_SetBlendMode(GX_BM_BLEND, GX_BL_SRCALPHA, GX_BL_INVSRCALPHA, GX_LO_CLEAR);
GX_SetAlphaUpdate(GX_TRUE);
GX_SetColorUpdate(GX_TRUE);
GX_CopyDisp(frameBuffer[fb], GX_TRUE);
VIDEO_SetNextFramebuffer(frameBuffer[fb]);
if (first_frame) <> 0 then
begin
VIDEO_SetBlack(False);
first_frame := 0;
end;
VIDEO_Flush();
VIDEO_WaitVSync();
fb := fb xor 1; // flip framebuffer
end;
end.
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