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https://gitlab.com/freepascal.org/fpc/source.git
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247 lines
6.9 KiB
ObjectPascal
247 lines
6.9 KiB
ObjectPascal
program lesson9;
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{$J+}
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{$macro on}
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{$mode objfpc}
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uses
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cmem, ctypes, gctypes, gccore;
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{$include inc/startex.tpl.inc}
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{$link build/startex.tpl.o}
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const startex = 0;
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const
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DEFAULT_FIFO_SIZE = (256 * 1024);
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NUM_STARS = 50;
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type
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tagtexdef = record
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pal_data: pointer;
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tex_data: pointer;
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sz_x: cuint32;
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sz_y: cuint32;
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fmt: cuint32;
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min_lod: cuint32;
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max_lod: cuint32;
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min: cuint32;
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mag: cuint32;
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wrap_s: cuint32;
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wrap_t: cuint32;
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nextdef: pointer;
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end;
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texdef = tagtexdef;
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ptexdef = ^texdef;
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TStar = record
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r,g,b: cuint8;
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dist: f32;
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ang: f32;
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end;
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var
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stars: array [0..NUM_STARS-1] of TStar;
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frameBuffer: array [0..1] of pcuint32 = (nil, nil);
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rmode: PGXRModeObj = nil;
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yscale: f32 = 0.0;
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spin: f32 = 0.0;
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xfbHeight, i: cuint32;
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fb: cuint32 = 0;
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first_frame: cuint32 = 1;
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zoom: f32 = -15.0;
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texture: GXTexObj;
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view: Mtx; // view and perspective matrices
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model, modelview: Mtx;
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perspective: Mtx44;
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gpfifo: pointer = nil;
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background: GXColor = (r:0; g:0; b:0; a:$ff;);
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cam: guVector = (x:0.0; y:0.0; z:0.0;);
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up: guVector = (x:0.0; y:1.0; z:0.0;);
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look: guVector = (x:0.0; y:0.0; z:-1.0;);
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starAxis1: guVector = (x:0; y:1; z:0;);
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starAxis2: guVector = (x:0; y:0; z:1;);
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starTPL: TPLFile;
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w, h: f32;
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mry, mrz: Mtx;
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begin
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VIDEO_Init();
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WPAD_Init();
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rmode := VIDEO_GetPreferredMode(nil);
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// allocate 2 framebuffers for double buffering
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frameBuffer[0] := SYS_AllocateFramebuffer(rmode);
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frameBuffer[1] := SYS_AllocateFramebuffer(rmode);
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// configure video
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VIDEO_Configure(rmode);
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VIDEO_SetNextFramebuffer(frameBuffer[fb]);
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VIDEO_Flush();
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VIDEO_WaitVSync();
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if (rmode^.viTVMode and VI_NON_INTERLACE) <> 0 then VIDEO_WaitVSync();
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// allocate the fifo buffer
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gpfifo := memalign(32,DEFAULT_FIFO_SIZE);
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memset(gpfifo,0,DEFAULT_FIFO_SIZE);
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fb := fb xor 1;
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// init the flipper
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GX_Init(gpfifo,DEFAULT_FIFO_SIZE);
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// clears the bg to color and clears the z buffer
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GX_SetCopyClear(background, $00ffffff);
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// other gx setup
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GX_SetViewport(0,0,rmode^.fbWidth,rmode^.efbHeight,0,1);
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yscale := GX_GetYScaleFactor(rmode^.efbHeight,rmode^.xfbHeight);
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xfbHeight := GX_SetDispCopyYScale(yscale);
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GX_SetScissor(0,0,rmode^.fbWidth,rmode^.efbHeight);
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GX_SetDispCopySrc(0,0,rmode^.fbWidth,rmode^.efbHeight);
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GX_SetDispCopyDst(rmode^.fbWidth,xfbHeight);
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GX_SetCopyFilter(rmode^.aa,rmode^.sample_pattern,GX_TRUE,rmode^.vfilter);
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if rmode^.viHeight = 2 * rmode^.xfbHeight then
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GX_SetFieldMode(rmode^.field_rendering, GX_ENABLE)
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else
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GX_SetFieldMode(rmode^.field_rendering, GX_DISABLE);
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if (rmode^.aa) <> 0 then
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GX_SetPixelFmt(GX_PF_RGB565_Z16, GX_ZC_LINEAR)
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else
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GX_SetPixelFmt(GX_PF_RGB8_Z24, GX_ZC_LINEAR);
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GX_SetCullMode(GX_CULL_NONE);
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GX_CopyDisp(frameBuffer[fb],GX_TRUE);
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GX_SetDispCopyGamma(GX_GM_1_0);
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// setup the vertex attribute table
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// describes the data
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// args: vat location 0-7, type of data, data format, size, scale
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// so for ex. in the first call we are sending position data with
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// 3 values X,Y,Z of size F32. scale sets the number of fractional
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// bits for non float data.
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GX_ClearVtxDesc();
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GX_SetVtxDesc(GX_VA_POS, GX_DIRECT);
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GX_SetVtxDesc(GX_VA_CLR0, GX_DIRECT);
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GX_SetVtxDesc(GX_VA_TEX0, GX_DIRECT);
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GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_POS, GX_POS_XYZ, GX_F32, 0);
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GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_TEX0, GX_TEX_ST, GX_F32, 0);
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GX_SetVtxAttrFmt(GX_VTXFMT0, GX_VA_CLR0, GX_CLR_RGBA, GX_RGB8, 0);
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// set number of rasterized color channels
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GX_SetNumChans(1);
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//set number of textures to generate
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GX_SetNumTexGens(1);
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// setup texture coordinate generation
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// args: texcoord slot 0-7, matrix type, source to generate texture coordinates from, matrix to use
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GX_SetTexCoordGen(GX_TEXCOORD0, GX_TG_MTX2x4, GX_TG_TEX0, GX_IDENTITY);
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GX_InvVtxCache();
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GX_InvalidateTexAll();
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TPL_OpenTPLFromMemory(@starTPL, @startex_tpl[0],startex_tpl_size);
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TPL_GetTexture(@starTPL,startex,@texture);
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// setup our camera at the origin
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// looking down the -z axis with y up
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guLookAt(view, @cam, @up, @look);
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// setup our projection matrix
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// this creates a perspective matrix with a view angle of 90,
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// and aspect ratio based on the display resolution
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w := rmode^.viWidth;
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h := rmode^.viHeight;
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guPerspective(perspective, 45, f32(w/h), 0.1, 300.0);
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GX_LoadProjectionMtx(perspective, GX_PERSPECTIVE);
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randomize();
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for i:=0 to NUM_STARS - 1 do
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begin
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stars[i].ang := 0.0;
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stars[i].dist := f32(i)/f32(NUM_STARS);
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stars[i].r := random(256); // Give star[loop] A Random Red Intensity
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stars[i].g := random(256); // Give star[loop] A Random Green Intensity
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stars[i].b := random(256); // Give star[loop] A Random Blue Intensity
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end;
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while true do
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begin
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WPAD_ScanPads();
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if (WPAD_ButtonsDown(0) and WPAD_BUTTON_HOME) <> 0 then exit;
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GX_SetTevOp(GX_TEVSTAGE0,GX_MODULATE);
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GX_SetTevOrder(GX_TEVSTAGE0, GX_TEXCOORD0, GX_TEXMAP0, GX_COLOR0A0);
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GX_LoadTexObj(@texture, GX_TEXMAP0);
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for i:=0 to NUM_STARS - 1 do
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begin
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guMtxIdentity(model);
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guMtxRotAxisDeg(mry, @starAxis1, stars[i].ang);
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guMtxRotAxisDeg(mrz, @starAxis2, spin);
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guMtxConcat(mry,mrz,model);
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guMtxTransApply(model, model, stars[i].dist,0.0,zoom);
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guMtxConcat(view,model,modelview);
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GX_LoadPosMtxImm(modelview, GX_PNMTX0);
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GX_Begin(GX_QUADS, GX_VTXFMT0, 4); // Draw a quad
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GX_Position3f32(-1.0, -1.0, 0.0); // Top Left of the quad (top)
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GX_Color3u8(stars[i].r,stars[i].g,stars[i].b); // Set The Color To Green
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GX_TexCoord2f32(0.0,0.0);
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GX_Position3f32(1.0, -1.0, 0.0); // Top Right of the quad (top)
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GX_Color3u8(stars[i].r,stars[i].g,stars[i].b); // Set The Color To Green
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GX_TexCoord2f32(1.0,0.0);
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GX_Position3f32(1.0, 1.0, 0.0); // Bottom Right of the quad (top)
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GX_Color3u8(stars[i].r,stars[i].g,stars[i].b); // Set The Color To Green
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GX_TexCoord2f32(1.0,1.0);
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GX_Position3f32(-1.0, 1.0, 0.0); // Bottom Left of the quad (top)
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GX_Color3u8(stars[i].r,stars[i].g,stars[i].b); // Set The Color To Green
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GX_TexCoord2f32(0.0,1.0);
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GX_End(); // Done Drawing The Quad
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spin := spin + 0.01;
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stars[i].ang := stars[i].ang + f32(i)/f32(NUM_STARS);
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stars[i].dist := stars[i].dist - 0.01;
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if (stars[i].dist < 0.0) then // Is The Star In The Middle Yet
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begin
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stars[i].dist := stars[i].dist + 5.0; // Move The Star 5 Units From The Center
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stars[i].r := random(256); // Give It A New Red Value
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stars[i].g := random(256); // Give It A New Green Value
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stars[i].b := random(256); // Give It A New Blue Value
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end;
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end;
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GX_SetZMode(GX_TRUE, GX_LEQUAL, GX_TRUE);
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GX_SetBlendMode(GX_BM_BLEND, GX_BL_SRCALPHA, GX_BL_ONE, GX_LO_SET);
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GX_SetColorUpdate(GX_TRUE);
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GX_SetAlphaUpdate(GX_TRUE);
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GX_CopyDisp(frameBuffer[fb],GX_TRUE);
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GX_DrawDone();
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VIDEO_SetNextFramebuffer(frameBuffer[fb]);
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if (first_frame) <> 0 then
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begin
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first_frame := 0;
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VIDEO_SetBlack(FALSE);
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end;
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VIDEO_Flush();
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VIDEO_WaitVSync();
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fb := fb xor 1;
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end;
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end.
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