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program triangle;
{$J+}
{$macro on}
{$mode objfpc}
{$inline on}
uses
cmem, ctypes, gctypes, gccore;
var
framebuffer: pcuint32;
screenMode: PGXRModeObj = nil;
readyForCopy: cuint8;
const
FIFO_SIZE = (256*1024);
var
vertices: array[0..2, 0..2] of cint16 =((0, 15, 0),(-15, -15, 0),(15, -15, 0));
colors: array[0..2, 0..3] of cuint8 = ((255, 0, 0, 255),(0, 255, 0, 255),(0, 0, 255, 255));
procedure update_screen(viewMatrix: Mtx);
var
modelView: Mtx;
begin
guMtxIdentity(modelView);
guMtxTransApply(modelView, modelView, 0.0, 0.0, -50.0);
guMtxConcat(viewMatrix,modelView,modelView);
GX_LoadPosMtxImm(modelView, GX_PNMTX0);
GX_Begin(GX_TRIANGLES, GX_VTXFMT0, 3);
GX_Position1x8(0);
GX_Color1x8(0);
GX_Position1x8(1);
GX_Color1x8(1);
GX_Position1x8(2);
GX_Color1x8(2);
GX_End();
GX_DrawDone();
readyForCopy := GX_TRUE;
VIDEO_WaitVSync();
end;
procedure copy_buffers(count: cuint32); cdecl;
begin
if (readyForCopy = GX_TRUE) then
begin
GX_SetZMode(GX_TRUE, GX_LEQUAL, GX_TRUE);
GX_SetColorUpdate(GX_TRUE);
GX_CopyDisp(frameBuffer,GX_TRUE);
GX_Flush();
readyForCopy := GX_FALSE;
end;
end;
var
view: Mtx;
projection: Mtx44;
backgroundColor: GXColor = (r:0; g:0; b:0; a:255;);
fifoBuffer: pcuint32 = nil;
camera, up, look: guVector;
begin
VIDEO_Init();
WPAD_Init();
screenMode := VIDEO_GetPreferredMode(nil);
frameBuffer := MEM_K0_TO_K1(integer(SYS_AllocateFramebuffer(screenMode)));
VIDEO_Configure(screenMode);
VIDEO_SetNextFramebuffer(frameBuffer);
VIDEO_SetPostRetraceCallback(@copy_buffers);
VIDEO_SetBlack(FALSE);
VIDEO_Flush();
fifoBuffer := MEM_K0_TO_K1(integer(memalign(32,FIFO_SIZE)));
memset(fifoBuffer, 0, FIFO_SIZE);
GX_Init(fifoBuffer, FIFO_SIZE);
GX_SetCopyClear(backgroundColor, $00ffffff);
GX_SetViewport(0,0,screenMode^.fbWidth,screenMode^.efbHeight,0,1);
GX_SetDispCopyYScale(f32(screenMode^.xfbHeight) / f32(screenMode^.efbHeight));
GX_SetScissor(0,0,screenMode^.fbWidth,screenMode^.efbHeight);
GX_SetDispCopySrc(0,0,screenMode^.fbWidth,screenMode^.efbHeight);
GX_SetDispCopyDst(screenMode^.fbWidth,screenMode^.xfbHeight);
GX_SetCopyFilter(screenMode^.aa, screenMode^.sample_pattern,
GX_TRUE, screenMode^.vfilter);
if screenMode^.viHeight = 2*screenMode^.xfbHeight then
GX_SetFieldMode(screenMode^.field_rendering,GX_ENABLE)
else
GX_SetFieldMode(screenMode^.field_rendering,GX_DISABLE);
GX_SetCullMode(GX_CULL_NONE);
GX_CopyDisp(frameBuffer,GX_TRUE);
GX_SetDispCopyGamma(GX_GM_1_0);
camera.x := 0.0;
camera.y := 0.0;
camera.z := 0.0;
up.x := 0.0;
up.y := 1.0;
up.z := 0.0;
look.x := 0.0;
look.y := 0.0;
look.z := -1.0;
guPerspective(projection, 60, 1.33, 10.0, 300.0);
GX_LoadProjectionMtx(projection, GX_PERSPECTIVE);
GX_ClearVtxDesc();
GX_SetVtxDesc(GX_VA_POS, GX_INDEX8);
GX_SetVtxDesc(GX_VA_CLR0, GX_INDEX8);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_POS, GX_POS_XYZ, GX_S16, 0);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_CLR0, GX_CLR_RGBA, GX_RGBA8, 0);
GX_SetArray(GX_VA_POS, @vertices, 3*sizeof(cint16));
GX_SetArray(GX_VA_CLR0, @colors, 4*sizeof(cuint8));
GX_SetNumChans(1);
GX_SetNumTexGens(0);
GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORDNULL, GX_TEXMAP_NULL, GX_COLOR0A0);
GX_SetTevOp(GX_TEVSTAGE0, GX_PASSCLR);
while true do
begin
guLookAt(view, @camera, @up, @look);
GX_SetViewport(0,0,screenMode^.fbWidth,screenMode^.efbHeight,0,1);
GX_InvVtxCache();
GX_InvalidateTexAll();
update_screen(view);
WPAD_ScanPads();
if (WPAD_ButtonsDown(0) and WPAD_BUTTON_HOME) <> 0 then
exit;
end;
end.
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