Lighting.h

#ifndef _LIGHTING_H_
#define _LIGHTING_H_

#include "GLInclude.h"
//Frankie Z
class Light{
    public:
        //glm::vec3 lambertianShading(glm::vec3 kd, glm::vec3 id, Object o);
        //Light() {}
        //global ambient light
        //Light(const glm::vec4&ia): i_a(ia) {}//only requires one intensity

        //directional
        //Light(const glm::vec3& d, const glm::vec4& ia, const glm::vec4& id, 
        //      const glm::vec4& is): direction(d), i_a(ia), i_d(id), i_s(is) {}//linear attenuation always have value of 1
        
        //point light
        Light(const glm::vec3& p, const glm::vec4& ia, const glm::vec4& id, const glm::vec4& is, const glm::vec3& attenconst): point(p), i_a(ia), i_d(id), i_s(is), LAC(attenconst) {}//angluar attenuation always has value of 1


        //spotlight
        //Light(const glm::vec3& p, const glm::vec3& d, const float t, const glm::vec4& ia, const glm::vec4& id, const glm::vec4& is, const glm::vec3& attenconst, const float a): point(p), direction(d), theta(t), i_a(ia), i_d(id), i_s(is), LAC(attenconst), attenuation(a) {} // a is angular attenuation constant

        const glm::vec3& getPoint()const{
            return point;
        }    
        const glm::vec4& getIa()const{
            return i_a;
        }
        const glm::vec4& getId()const{
            return i_d;
        }
         const glm::vec4& getIs()const {
            return i_s;
        }  
        const glm::vec3& getLAC()const{
            return LAC;
        }  


    private:
        glm::vec3 point;
        //light intensities for Ambient diffuse & specuar components
        glm::vec3 direction;
        float theta;//cut off angle
        glm::vec3 LAC;//linearattenuation constants
        float attenuation;
        glm::vec4 i_a;
        glm::vec4 i_d;
        glm::vec4 i_s;

        //glm::vec3 lambertianShading(glm::vec3 kd, glm::vec3 id, Object o);
        //glm::vec3 calculateDirection(const glm::vec3& p, const glm::vec3& x);
        //glm::vec3 lambertianShading(Ray x, Plane o);
        //glm::vec3 blinPhongShading(Ray x, Plane o, Material m, Camera c);
};

#endif