struct BaseLight
{
	vec3 color;
	float intensity;
};

struct Attenuation{
	float constant;
	float linear;
	float exponent;
};

struct PointLight{
	BaseLight base;
	Attenuation atten;
	vec3 pos;
	float range;
};

struct SpotLight{
	PointLight point;
	vec3 direction;
	float cutoff;
};


vec4 calcSpotLight(SpotLight spotLight, vec3 normal){
	vec3 lightDirection = normalize(worldPos0 - spotLight.point.pos);
	float spotFactor = dot(lightDirection, spotLight.direction);

	vec4 color = vec4(0,0,0,0);

	if (spotFactor > spotLight.cutoff){
		color = calcPointLight(spotLight.point, normal) *
				(1.0 - ((1.0 - spotFactor)/(1.0 - spotLight.cutoff)));
	}

	return color;

}