particles are sorted via heap sort

particle.frag

@@ -8,14 +8,16 @@ layout (location=0) out vec4 FragColor;
 layout (location=1) out vec4 BrightColor;
 
 uniform sampler2D tex;
-uniform vec4 color[507];
+uniform float lifePercentage[500];
+uniform vec4 startColor,endColor;
+//uniform vec4 color[500];
 
 void main(){
 	float alpha=texture(tex,texCoords).r;
-	vec4 c=color[id];
-	c=vec4(c.x,c.y,c.z,c.w*alpha);
+	vec4 c=startColor+(endColor-startColor)*lifePercentage[id];
+	c=vec4(c.x,c.y,c.z,alpha);
 	float brightness = dot(c.rgb, vec3(0.2126, 0.7152, 0.0722));
 	if(brightness>1)
 		BrightColor=vec4(c.rgb,1);
-	FragColor=vec4(c.x,c.y,c.z,c.w*alpha);
+	FragColor=c;
 }