port from perforce

hgplus/ShaderMinifier/tests/real/extatique/graindo12.fs

@@ -0,0 +1,110 @@
+uniform float time;
+uniform float param1;
+
+
+uniform sampler1D distRamp;
+uniform vec3 matColor;
+uniform vec3 ambientColor;
+
+
+
+float gausa( float a )
+{ 
+	return texture1D(distRamp, abs(a) * 0.125 ).r; /*    pow(0.5f, abs(a)); */
+}
+
+float gausb( float a )
+{ 
+	return pow(0.5, abs(a));
+}
+
+mat3 rotationMatrix( float a , float b , float c )
+{
+	float xvs = sin(a);
+	float yvs = sin(b);
+	float zvs = sin(c);
+	
+	float xvc = cos(a);
+	float yvc = cos(b);
+	float zvc = cos(c);
+	
+	float Ox1 = yvc * zvc;
+	float Ox2 = xvc * yvs * zvc + xvs * zvs;
+	float Ox3 = xvc * zvs - xvs * yvs * zvc;
+	
+	float Oy1 = xvc * zvc + xvs * yvs * zvs;
+	float Oy2 = xvs * zvc - xvc * yvs * zvs;
+	float Oy3 = -yvc * zvs;
+	
+	float Oz1 = xvc * yvc;
+	float Oz2 = -xvs * yvc;
+	float Oz3 = -yvs;
+	
+	return mat3( Ox1 , Ox3 , Ox2 ,
+	          Oy3 , Oy1 , Oy2 ,
+	          Oz3 , Oz2 , Oz1 );
+}
+
+
+
+
+
+vec3 objet(vec3 c , vec3 v , float t )
+{
+	vec3 vt = vec3(8.0,2.0,2.0);
+	
+	float ti = cos(t * 3.0);
+	float to = cos(t * 0.2) * 0.02 + 0.5; 
+	
+	vec3 co = vec3(0.0);
+	
+	
+	mat3 disto = rotationMatrix( v.z , v.x , -v.y );
+	
+	vec3 vi = v * disto;
+	float lvi = length(vi);
+	
+	float gg = gausa((lvi - 12.0 * to))
+	         * gausa((8.485 - 12.0 * to))
+	         * gausa((lvi - 8.485));
+	
+	vec3 col = c * vec3(1.0 - gg);
+	
+	vt.x = vi.x + 3.0;
+	
+	
+	float size = param1;
+	float gg2 = gausa(size * (lvi - 6.0 * to))	
+	          * gausa(size * (lvi - length(vt)));
+	
+	vec3 material = matColor;
+	
+	return mix(col, material , gg2 * param1);
+}
+
+void  main(void)
+{
+	float t = time;
+	
+	vec2 xy = gl_TexCoord[0].xy;
+	
+	
+	vec3 coll = vec3(0.0);
+	
+	const int iter = 3;
+	
+	mat3 rotation = rotationMatrix( t, t, -t);
+	
+	vec3 d = rotation * vec3(xy, float(iter));
+	vec3 a = rotation * vec3(xy * vec2(2.0), -float(iter));
+	
+	
+	for (int z = 0; z <= iter; ++z)
+	{
+		float fr = float(z) / float(iter);
+		vec3 posi = mix(d, a, fr); 
+		coll = objet(coll, posi, t);	
+	
+	}
+	gl_FragColor = vec4 (coll, 1.0);
+}