#ifdef UNIFORM_ID uniform uint id; #else flat in vec4 id; #endif out vec4 fragColor; void main() { #ifdef UNIFORM_ID fragColor = vec4( ((id ) & 0xFFu) * (1.0f / 255.0f), ((id >> 8u) & 0xFFu) * (1.0f / 255.0f), ((id >> 16u) & 0xFFu) * (1.0f / 255.0f), ((id >> 24u) ) * (1.0f / 255.0f)); #else fragColor = id; #endif }