added simple demoreel and ps2 skeleton coded by claude fable 5

tools/demoreel/proctex.cpp

@@ -0,0 +1,137 @@
+#include <math.h>
+
+#include "demoreel.h"
+
+// Procedural textures so the demos need no asset files at all.
+
+using namespace rw;
+
+static Texture*
+imageToTexture(Image *img)
+{
+	Raster *ras = Raster::createFromImage(img);
+	img->destroy();
+	if(ras == nil)
+		return nil;
+	Texture *tex = Texture::create(ras);
+	tex->setFilter(Texture::LINEAR);
+	tex->setAddressU(Texture::WRAP);
+	tex->setAddressV(Texture::WRAP);
+	return tex;
+}
+
+// soft radial blob for additive particles
+Texture*
+MakeGlowTexture(void)
+{
+	const int SZ = 64;
+	Image *img = Image::create(SZ, SZ, 32);
+	img->allocate();
+
+	int x, y;
+	for(y = 0; y < SZ; y++){
+		uint8 *line = img->pixels + y*img->stride;
+		for(x = 0; x < SZ; x++){
+			float dx = (x + 0.5f - SZ/2) / (SZ/2);
+			float dy = (y + 0.5f - SZ/2) / (SZ/2);
+			float r = sqrtf(dx*dx + dy*dy);
+			float v = 1.0f - r;
+			if(v < 0.0f) v = 0.0f;
+			v = v*v*(3.0f - 2.0f*v);	// smoothstep
+			v = v*v;			// sharpen the core
+			uint8 c = (uint8)(v*255.0f);
+			line[x*4+0] = c;
+			line[x*4+1] = c;
+			line[x*4+2] = c;
+			line[x*4+3] = c;
+		}
+	}
+	return imageToTexture(img);
+}
+
+// glowing neon grid on dark ground
+Texture*
+MakeGridTexture(void)
+{
+	const int SZ = 128;
+	const int CELL = 32;
+	Image *img = Image::create(SZ, SZ, 32);
+	img->allocate();
+
+	int x, y;
+	for(y = 0; y < SZ; y++){
+		uint8 *line = img->pixels + y*img->stride;
+		for(x = 0; x < SZ; x++){
+			int mx = x % CELL; if(mx > CELL/2) mx = CELL-mx;
+			int my = y % CELL; if(my > CELL/2) my = CELL-my;
+			int d = mx < my ? mx : my;
+			float v = 1.0f - d/6.0f;
+			if(v < 0.0f) v = 0.0f;
+			v = v*v;
+			// dark blue ground, cyan-white lines
+			float r = 0.02f + v*0.75f;
+			float g = 0.03f + v*0.95f;
+			float b = 0.10f + v*0.90f;
+			line[x*4+0] = (uint8)(r*255.0f);
+			line[x*4+1] = (uint8)(g*255.0f);
+			line[x*4+2] = (uint8)(b*255.0f);
+			line[x*4+3] = 255;
+		}
+	}
+	return imageToTexture(img);
+}
+
+// fake sky-ground gradient with highlight streaks, for env mapping
+Texture*
+MakeEnvTexture(void)
+{
+	const int SZ = 128;
+	Image *img = Image::create(SZ, SZ, 32);
+	img->allocate();
+
+	int x, y;
+	for(y = 0; y < SZ; y++){
+		uint8 *line = img->pixels + y*img->stride;
+		float fy = (float)y/SZ;
+		for(x = 0; x < SZ; x++){
+			float fx = (float)x/SZ;
+			float r, g, b;
+			if(fy < 0.5f){
+				// sky: bright at horizon
+				float t = fy*2.0f;
+				r = 0.05f + t*0.55f;
+				g = 0.15f + t*0.65f;
+				b = 0.35f + t*0.65f;
+			}else{
+				// ground: dark, fading down
+				float t = (fy-0.5f)*2.0f;
+				r = 0.45f - t*0.40f;
+				g = 0.35f - t*0.32f;
+				b = 0.30f - t*0.28f;
+			}
+			// horizon band
+			float h = fabsf(fy - 0.5f);
+			float band = 1.0f - h*8.0f;
+			if(band > 0.0f){
+				band = band*band;
+				r += band*0.5f;
+				g += band*0.5f;
+				b += band*0.4f;
+			}
+			// vertical highlight streaks in the sky
+			float streak = sinf(fx*3.14159f*6.0f);
+			streak = streak*streak*streak*streak;
+			if(fy < 0.5f)
+				r += streak*0.15f, g += streak*0.15f, b += streak*0.1f;
+
+			if(r > 1.0f) r = 1.0f;
+			if(g > 1.0f) g = 1.0f;
+			if(b > 1.0f) b = 1.0f;
+			line[x*4+0] = (uint8)(r*255.0f);
+			line[x*4+1] = (uint8)(g*255.0f);
+			line[x*4+2] = (uint8)(b*255.0f);
+			line[x*4+3] = 255;
+		}
+	}
+	return imageToTexture(img);
+}