Shader.h

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//#ifndef SHADER_H
//#define SHADER_H
 
#include <QtOpenGL>
 
class Shader : protected QOpenGLFunctions {
private:
public:
    Shader() {
        initializeOpenGLFunctions();
 
        lineShader.create();
        lineShader.addShaderFromSourceFile(QOpenGLShader::Vertex, "../assets/shaders/vertex.vert");
        lineShader.addShaderFromSourceFile(QOpenGLShader::Fragment, "../assets/shaders/fragment_line.frag");
        glBindAttribLocation(lineShader.programId(), 0, "aPos");
        glBindAttribLocation(lineShader.programId(), 1, "aColor");
 
        normalShader.create();
        normalShader.addShaderFromSourceFile(QOpenGLShader::Vertex, "../assets/shaders/vertex.vert");
        normalShader.addShaderFromSourceFile(QOpenGLShader::Fragment, "../assets/shaders/fragment.frag");
        glBindAttribLocation(normalShader.programId(), 0, "aPos");
        glBindAttribLocation(normalShader.programId(), 1, "aColor");
        
        bezierShader.create();
        bezierShader.addShaderFromSourceFile(QOpenGLShader::Vertex, "../assets/shaders/vertex.vert");
        bezierShader.addShaderFromSourceFile(QOpenGLShader::TessellationControl, "../assets/shaders/tcs.txt");
        bezierShader.addShaderFromSourceFile(QOpenGLShader::TessellationEvaluation, "../assets/shaders/tes.txt");
        bezierShader.addShaderFromSourceFile(QOpenGLShader::Fragment, "../assets/shaders/fragment.frag");
        bezierShader.setPatchVertexCount(4);
        glBindAttribLocation(bezierShader.programId(), 0, "aPos");
        glBindAttribLocation(bezierShader.programId(), 1, "aColor");
    };
    
    ~Shader() {
        lineShader.removeAllShaders();
        lineShader.release();
        normalShader.removeAllShaders();
        normalShader.release();
        bezierShader.removeAllShaders();
        bezierShader.release();
    };
 
    QOpenGLShaderProgram normalShader;
    QOpenGLShaderProgram lineShader;
    QOpenGLShaderProgram bezierShader;
};