Shader.h

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// as seen in CG Tutorial (http://cg.tuwien.ac.at/courses/CG23/videos/2015/CG_Tut_2_part4%20-%20WLAN.m4v)

#pragma once

#include <string>
#include "glew.h"
#include "glfw3.h"
#include "../Scene/PointLight.h"
#include <vector>
#include <memory>

class Shader
{
public:
    Shader(const std::string& vertexShader, const std::string& fragmentShader);
    Shader(const std::string& vertexShader, const std::string& geometryShader, const std::string& fragmentShader);
    ~Shader();

    void useShader() const;
    
    virtual void setLighting(std::vector<std::shared_ptr<PointLight>> *allLights);
    
    void setCutawayDimension(glm::vec2 dim);

    virtual void bindTexture(int unit);

    GLuint programHandle;

private:
    void loadShader(const std::string& shader, GLenum shaderType, GLuint& handle);
    void link();
    void linkWithGeometryShader();

    GLuint vertexHandle;
    GLuint fragmentHandle;
    GLuint geometryHandle;
};