#version 450

layout(triangles, invocations = 6) in;
layout(triangle_strip, max_vertices = 3) out;

struct ShadowMapSet
{
    uint entity_id;
    uint cascade_count;
    uint shadow_texture_id;   
    uint frame_buffer_id;
    float near_plane[8];
    float far_plane[8];
    mat4 light_space_proj[6];
    mat4 light_space_view[6];
};
   
//Push constants updated for each light
layout(binding = 0) uniform shadow_per_frame
{
	vec3 camera_pos;
	uint shadow_idxs;
};

layout(std430, binding = 5) readonly buffer ShadowMapSets
{
	ShadowMapSet shadows[10];
};

void main()
{          
	for (int i = 0; i < 3; ++i)
	{
		gl_Position = shadows[shadow_idxs].light_space_proj[gl_InvocationID] * 
						  shadows[shadow_idxs].light_space_view[gl_InvocationID] * 
						  gl_in[i].gl_Position;
		gl_Layer = gl_InvocationID;
		EmitVertex();
	}
	EndPrimitive();
}