- Restruct folder tree

src/Gem/examples/10.glsl/game.frag

@@ -0,0 +1,30 @@
+// Cyrille Henry 2007
+
+uniform sampler2D texture;
+
+const float dx = 1./500.; // change to gemwin dim
+
+void main (void)
+{	
+    vec2 tmp = (gl_TextureMatrix[0] * gl_TexCoord[0]).st;
+
+	float x = tmp.s;
+	float y = tmp.t;
+	
+	vec4 c;
+	c  = texture2D(texture, vec2(x-dx, y-dx));
+	c += texture2D(texture, vec2(x, y-dx));
+	c += texture2D(texture, vec2(x+dx, y-dx));
+	c += texture2D(texture, vec2(x-dx, y));
+	c += texture2D(texture, vec2(x+dx, y));
+	c += texture2D(texture, vec2(x-dx, y+dx));
+	c += texture2D(texture, vec2(x, y+dx));
+	c += texture2D(texture, vec2(x+dx, y+dx));
+
+	vec4 c1 = texture2D(texture, vec2(x, y));
+
+	c.rgb = vec3(step(2.5-c1.r,c.r)*step(c.r,3.5));
+	c.a = 1.;
+
+	gl_FragColor = c;
+}