#version 330 core
layout (triangles) in;
layout (triangle_strip, max_vertices=18) out;

uniform mat4 u_shadowMatrices[6];

out vec4 v_fragmentPosition;

void main() {

    for(int face = 0; face < 6; face++) {

        gl_Layer = face;
        for(int i = 0; i < 3; i++) {

            v_fragmentPosition = gl_in[i].gl_Position;
            gl_Position = u_shadowMatrices[face] * v_fragmentPosition;
            EmitVertex();

        }

        EndPrimitive();

    }
}