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

layout(binding = 8) uniform UBO
{
    mat4 viewMatrices[6];
} ubo;

in VS_OUT {
    vec2 uv;
    vec3 fragpos;
} vs_in[];

out VS_OUT {
    vec2 uv;
    vec3 fragpos;
} vs_out;

void main()
{
    for (int face = 0; face < 6; ++face) {
        gl_Layer = face;
        for (int i = 0; i < 3; ++i) {
            vs_out.uv = vs_in[i].uv;
            vs_out.fragpos = vs_in[i].fragpos;

            gl_Position = ubo.viewMatrices[face] * gl_in[i].gl_Position;

            EmitVertex();
        }
        EndPrimitive();
    }
}