#version 330 core

layout(triangles) in;
layout(triangle_strip, max_vertices = 18) out;

uniform mat4 view[6];
uniform mat4 proj;

// debug parameter
flat out int fcolor_idx;

void main(void){
    for (int layerId = 0; layerId < 6; ++layerId){
        for (int i = 0; i < gl_in.length(); ++i){
            gl_Layer = layerId;
            fcolor_idx = layerId;
            gl_Position = proj * view[layerId] * gl_in[i].gl_Position;
            EmitVertex();
        }
        EndPrimitive();
    }
}