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program lesson9;
{$J+}
{$macro on}
{$mode objfpc}
uses
cmem, ctypes, gctypes, gccore;
{$include inc/startex.tpl.inc}
{$link build/startex.tpl.o}
const startex = 0;
const
DEFAULT_FIFO_SIZE = (256 * 1024);
NUM_STARS = 50;
type
tagtexdef = record
pal_data: pointer;
tex_data: pointer;
sz_x: cuint32;
sz_y: cuint32;
fmt: cuint32;
min_lod: cuint32;
max_lod: cuint32;
min: cuint32;
mag: cuint32;
wrap_s: cuint32;
wrap_t: cuint32;
nextdef: pointer;
end;
texdef = tagtexdef;
ptexdef = ^texdef;
TStar = record
r,g,b: cuint8;
dist: f32;
ang: f32;
end;
var
stars: array [0..NUM_STARS-1] of TStar;
frameBuffer: array [0..1] of pcuint32 = (nil, nil);
rmode: PGXRModeObj = nil;
yscale: f32 = 0.0;
spin: f32 = 0.0;
xfbHeight, i: cuint32;
fb: cuint32 = 0;
first_frame: cuint32 = 1;
zoom: f32 = -15.0;
texture: GXTexObj;
view: Mtx; // view and perspective matrices
model, modelview: Mtx;
perspective: Mtx44;
gpfifo: pointer = nil;
background: GXColor = (r:0; g:0; b:0; a:$ff;);
cam: guVector = (x:0.0; y:0.0; z:0.0;);
up: guVector = (x:0.0; y:1.0; z:0.0;);
look: guVector = (x:0.0; y:0.0; z:-1.0;);
starAxis1: guVector = (x:0; y:1; z:0;);
starAxis2: guVector = (x:0; y:0; z:1;);
starTPL: TPLFile;
w, h: f32;
mry, mrz: Mtx;
begin
VIDEO_Init();
WPAD_Init();
rmode := VIDEO_GetPreferredMode(nil);
// allocate 2 framebuffers for double buffering
frameBuffer[0] := SYS_AllocateFramebuffer(rmode);
frameBuffer[1] := SYS_AllocateFramebuffer(rmode);
// configure video
VIDEO_Configure(rmode);
VIDEO_SetNextFramebuffer(frameBuffer[fb]);
VIDEO_Flush();
VIDEO_WaitVSync();
if (rmode^.viTVMode and VI_NON_INTERLACE) <> 0 then VIDEO_WaitVSync();
// allocate the fifo buffer
gpfifo := memalign(32,DEFAULT_FIFO_SIZE);
memset(gpfifo,0,DEFAULT_FIFO_SIZE);
fb := fb xor 1;
// init the flipper
GX_Init(gpfifo,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 attribute table
// describes the data
// args: vat location 0-7, type of data, data format, size, scale
// so for ex. in the first call we are sending position data with
// 3 values X,Y,Z of size F32. scale sets the number of fractional
// bits for non float data.
GX_ClearVtxDesc();
GX_SetVtxDesc(GX_VA_POS, GX_DIRECT);
GX_SetVtxDesc(GX_VA_CLR0, GX_DIRECT);
GX_SetVtxDesc(GX_VA_TEX0, GX_DIRECT);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_POS, GX_POS_XYZ, GX_F32, 0);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_TEX0, GX_TEX_ST, GX_F32, 0);
GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_CLR0, GX_CLR_RGBA, GX_RGB8, 0);
// set number of rasterized color channels
GX_SetNumChans(1);
//set number of textures to generate
GX_SetNumTexGens(1);
// setup texture coordinate generation
// args: texcoord slot 0-7, matrix type, source to generate texture coordinates from, matrix to use
GX_SetTexCoordGen(GX_TEXCOORD0, GX_TG_MTX2x4, GX_TG_TEX0, GX_IDENTITY);
GX_InvVtxCache();
GX_InvalidateTexAll();
TPL_OpenTPLFromMemory(@starTPL, @startex_tpl[0],startex_tpl_size);
TPL_GetTexture(@starTPL,startex,@texture);
// setup our camera at the origin
// looking down the -z axis with y up
guLookAt(view, @cam, @up, @look);
// setup our projection matrix
// this creates a perspective matrix with a view angle of 90,
// and aspect ratio based on the display resolution
w := rmode^.viWidth;
h := rmode^.viHeight;
guPerspective(perspective, 45, f32(w/h), 0.1, 300.0);
GX_LoadProjectionMtx(perspective, GX_PERSPECTIVE);
randomize();
for i:=0 to NUM_STARS - 1 do
begin
stars[i].ang := 0.0;
stars[i].dist := f32(i)/f32(NUM_STARS);
stars[i].r := random(256); // Give star[loop] A Random Red Intensity
stars[i].g := random(256); // Give star[loop] A Random Green Intensity
stars[i].b := random(256); // Give star[loop] A Random Blue Intensity
end;
while true do
begin
WPAD_ScanPads();
if (WPAD_ButtonsDown(0) and WPAD_BUTTON_HOME) <> 0 then exit;
GX_SetTevOp(GX_TEVSTAGE0,GX_MODULATE);
GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLOR0A0);
GX_LoadTexObj(@texture, GX_TEXMAP0);
for i:=0 to NUM_STARS - 1 do
begin
guMtxIdentity(model);
guMtxRotAxisDeg(mry, @starAxis1, stars[i].ang);
guMtxRotAxisDeg(mrz, @starAxis2, spin);
guMtxConcat(mry,mrz,model);
guMtxTransApply(model, model, stars[i].dist,0.0,zoom);
guMtxConcat(view,model,modelview);
GX_LoadPosMtxImm(modelview, GX_PNMTX0);
GX_Begin(GX_QUADS, GX_VTXFMT0, 4); // Draw a quad
GX_Position3f32(-1.0, -1.0, 0.0); // Top Left of the quad (top)
GX_Color3u8(stars[i].r,stars[i].g,stars[i].b); // Set The Color To Green
GX_TexCoord2f32(0.0,0.0);
GX_Position3f32(1.0, -1.0, 0.0); // Top Right of the quad (top)
GX_Color3u8(stars[i].r,stars[i].g,stars[i].b); // Set The Color To Green
GX_TexCoord2f32(1.0,0.0);
GX_Position3f32(1.0, 1.0, 0.0); // Bottom Right of the quad (top)
GX_Color3u8(stars[i].r,stars[i].g,stars[i].b); // Set The Color To Green
GX_TexCoord2f32(1.0,1.0);
GX_Position3f32(-1.0, 1.0, 0.0); // Bottom Left of the quad (top)
GX_Color3u8(stars[i].r,stars[i].g,stars[i].b); // Set The Color To Green
GX_TexCoord2f32(0.0,1.0);
GX_End(); // Done Drawing The Quad
spin := spin + 0.01;
stars[i].ang := stars[i].ang + f32(i)/f32(NUM_STARS);
stars[i].dist := stars[i].dist - 0.01;
if (stars[i].dist < 0.0) then // Is The Star In The Middle Yet
begin
stars[i].dist := stars[i].dist + 5.0; // Move The Star 5 Units From The Center
stars[i].r := random(256); // Give It A New Red Value
stars[i].g := random(256); // Give It A New Green Value
stars[i].b := random(256); // Give It A New Blue Value
end;
end;
GX_SetZMode(GX_TRUE, GX_LEQUAL, GX_TRUE);
GX_SetBlendMode(GX_BM_BLEND, GX_BL_SRCALPHA, GX_BL_ONE, GX_LO_SET);
GX_SetColorUpdate(GX_TRUE);
GX_SetAlphaUpdate(GX_TRUE);
GX_CopyDisp(frameBuffer[fb],GX_TRUE);
GX_DrawDone();
VIDEO_SetNextFramebuffer(frameBuffer[fb]);
if (first_frame) <> 0 then
begin
first_frame := 0;
VIDEO_SetBlack(FALSE);
end;
VIDEO_Flush();
VIDEO_WaitVSync();
fb := fb xor 1;
end;
end.
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