nuclear@1: #include "light.h"
nuclear@1: 
nuclear@1: Light::Light()
nuclear@1: {
nuclear@12: 	type = NODE_LIGHT;
nuclear@17: 	intens = 1.0;
nuclear@1: 	color.x = color.y = color.z = 1.0;
nuclear@1: 	atten.x = 1.0;
nuclear@1: 	atten.y = 0.0;
nuclear@1: 	atten.z = 0.0;
nuclear@1: }
nuclear@1: 
nuclear@17: void Light::set_intensity(float val)
nuclear@17: {
nuclear@17: 	intens = val;
nuclear@17: }
nuclear@17: 
nuclear@17: float Light::get_intensity() const
nuclear@17: {
nuclear@17: 	return intens;
nuclear@17: }
nuclear@17: 
nuclear@1: void Light::set_color(const Vector3 &color)
nuclear@1: {
nuclear@1: 	this->color = color;
nuclear@1: }
nuclear@1: 
nuclear@1: const Vector3 &Light::get_color() const
nuclear@1: {
nuclear@1: 	return color;
nuclear@1: }
nuclear@1: 
nuclear@17: Vector3 Light::get_color(const Vector3 &pt) const
nuclear@17: {
nuclear@17: 	float d = (get_position() - pt).length();
nuclear@17: 	return color * calc_attenuation(d) * intens;
nuclear@17: }
nuclear@1: 
nuclear@1: void Light::set_attenuation(const Vector3 &atten)
nuclear@1: {
nuclear@1: 	this->atten = atten;
nuclear@1: }
nuclear@1: 
nuclear@1: const Vector3 &Light::get_attenuation() const
nuclear@1: {
nuclear@1: 	return atten;
nuclear@1: }
nuclear@12: 
nuclear@17: float Light::calc_attenuation(float d) const
nuclear@17: {
nuclear@17: 	float denom = atten.x + atten.y * d + atten.z * d * d;
nuclear@17: 	float at = denom == 0.0 ? 1.0 : 1.0 / denom;
nuclear@17: 	return at > 1.0 ? 1.0 : at;
nuclear@17: }
nuclear@17: 
nuclear@18: void Light::draw(bool emph) const
nuclear@12: {
nuclear@12: }
nuclear@12: 
nuclear@17: bool Light::intersect(const Ray &ray, RayHit *hit) const
nuclear@12: {
nuclear@17: 	return false;	// TODO
nuclear@12: }