Canvas.h

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#ifndef CANVAS_H
#define CANVAS_H

#include <iostream>
#include <vector>
#include <stdio.h>
#include <math.h>

#include <QOpenGLWidget>
#include <QOpenGLFunctions_3_1>
#include <QtOpenGL>
#include <QOpenGLFunctions>
#include <QOpenGLBuffer>
#include <QOpenGLShaderProgram>
#include <QMatrix4x4>


#include "Params.h"
#include "Molecule.h"
#include "Camera.h"
#include "Direction.h"

class Canvas: public QOpenGLWidget, protected QOpenGLFunctions
{
    Q_OBJECT
public:

    Canvas(QWidget *parent = 0);
    ~Canvas();

    virtual void initializeGL();

    virtual void resizeGL(int width, int height);
    virtual void paintGL();

    void loadModel();

    void drawScene();

    void drawEdges();

    void drawHalos();

    void calculateAmbientOcclusionMap();

    void drawPostProcess();

    virtual void mouseMoveEvent(QMouseEvent * event);

    virtual void mousePressEvent(QMouseEvent * event);

    virtual void mouseReleaseEvent(QMouseEvent * event);

    virtual void wheelEvent(QWheelEvent * event);

protected:

private:   

    QOpenGLShaderProgram mainShader;

    QOpenGLFramebufferObject* sceneFBO;

    GLuint sceneDepthTexture;

    QOpenGLShaderProgram haloShader;

    QOpenGLFramebufferObject* haloFBO;

    QOpenGLShaderProgram edgeShader;

    QOpenGLFramebufferObject* edgeFBO;

    QOpenGLShaderProgram shadowMapShader;

    QOpenGLShaderProgram occlusionMapShader;

    QOpenGLFramebufferObject* occlusionMapFBO;

    GLuint shadowMapTexture;

    QOpenGLShaderProgram postprocessShader;


    QOpenGLBuffer quadVertexBuffer;

    QOpenGLBuffer quadUVBuffer;

    QOpenGLVertexArrayObject postProcessVAO;

    void initializeShaders();

    void initializeQuad();

    void initializeFrameBufferObjects();

    void destroyFrameBufferObjects();

    Molecule* molecule;

    Camera* camera;

    QPoint lastPos;

    bool mouseRightDown;
};

#endif // CANVAS_H