anki-3d-engine/src/Scene/Light.h

/*
LIGHTING MODEL

Final intensity:                If = Ia + Id + Is
Ambient intensity:              Ia = Al * Am
Ambient intensity of light:     Al
Ambient intensity of material:  Am
Defuse intensity:               Id = Dl * Dm * LambertTerm
Defuse intensity of light:      Dl
Defuse intensity of material:   Dm
LambertTerm:                    max(Normal dot Light, 0.0)
Specular intensity:             Is = Sm x Sl x pow(max(R dot E, 0.0), f)
Specular intensity of light:    Sl
Specular intensity of material: Sm
*/

#ifndef _LIGHT_H_
#define _LIGHT_H_

#include "Common.h"
#include "Texture.h"
#include "SceneNode.h"
#include "Camera.h"

class LightProps;


/// Light scene node (Abstract)
class Light: public SceneNode
{
	public:
		enum Type { LT_POINT, LT_SPOT };

		Type type;
		LightProps* lightProps; ///< Later we will add a controller
	
		Light(Type type_): SceneNode(NT_LIGHT), type(type_) {}
		//void init(const char*);
		void deinit();
		void render();
};


/// PointLight scene node
class PointLight: public Light
{
	public:
		float radius;

		PointLight(): Light(LT_POINT) {}
		void init(const char*);
};


/// SpotLight scene node
class SpotLight: public Light
{
	public:
		Camera camera;
		bool castsShadow;

		SpotLight(): Light(LT_SPOT), castsShadow(false) { addChild(&camera); }
		float getDistance() const { return camera.getZFar(); }
		void setDistance(float d) { camera.setZFar(d); }
		void init(const char*);
};


#endif