Shader.hpp

#ifndef SHADER_H
#define SHADER_H

#include <glad/glad.h>
#include <glm/glm.hpp>
#include <string>
#include <fstream>
#include <sstream>
#include <iostream>

class Shader
{
public:
    // the program ID
    unsigned int ID;

    // constructor reads and builds the shader
    Shader(const char* vertexPath, const char* fragmentPath);
    // use/activate the shader
    void use();
    void Delete();
    // utility uniform functions
    void setBool(const std::string& name, bool value) const;
    void setInt(const std::string& name, int value) const;
    void setFloat(const std::string& name, float value) const;

    void setVec2(const std::string& name, glm::vec2& value) const;
    void setVec2(const std::string& name, float x, float y) const;
    void setVec3(const std::string& name, const glm::vec3& value) const;
    void setVec3(const std::string& name, float x, float y, float z) const;
    void setVec4(const std::string& name, const glm::vec4& value) const;
    void setVec4(const std::string& name, float x, float y, float z, float w) const;
    void setMat2(const std::string& name, const glm::mat2& mat) const;
    void setMat3(const std::string& name, const glm::mat3& mat) const;
    void setMat4(const std::string& name, const glm::mat4& mat) const;


private:
    // utility function for checking shader compilation/linking errors.
    // ------------------------------------------------------------------------
    void checkCompileErrors(unsigned int shader, std::string type)
    {
        int success;
        char infoLog[1024];
        if (type != "PROGRAM")
        {
            glGetShaderiv(shader, GL_COMPILE_STATUS, &success);
            if (!success)
            {
                glGetShaderInfoLog(shader, 1024, NULL, infoLog);
                std::cout << "ERROR::SHADER_COMPILATION_ERROR of type: " << type << "\n" << infoLog << "\n -- --------------------------------------------------- -- " << std::endl;
            }
        }
        else
        {
            glGetProgramiv(shader, GL_LINK_STATUS, &success);
            if (!success)
            {
                glGetProgramInfoLog(shader, 1024, NULL, infoLog);
                std::cout << "ERROR::PROGRAM_LINKING_ERROR of type: " << type << "\n" << infoLog << "\n -- --------------------------------------------------- -- " << std::endl;
            }
        }
    }
};

#endif