#version 430

struct Light
{
	vec3 ambient;
};

#define MAX_LIGHTS 16
layout(location = 4) uniform Light lights[MAX_LIGHTS];
layout(location = 20) uniform uint num_lights;

out vec4 frag_color;
void main()
{
	vec3 accum = vec3(0.0);
	for (uint i = 0; i < MAX_LIGHTS && i < num_lights; ++i) {
		accum = accum + lights[i].ambient;
	}
	frag_color = vec4(accum, 1.0);
}