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  #pragma once
  
  #include "geometryengine.h"
  #include "GrCamera.h"
  #include <model.h>
  
  #include <QOpenGLWidget>
  #include <QOpenGLFunctions>
  #include <QOpenGLShaderProgram>
  #include <QOpenGLBuffer>
  #include <QOpenGLTexture>
  
  #include <QMatrix4x4>
  #include <QQuaternion>
  #include <QVector2D>
  #include <QBasicTimer>
  
  
  QT_FORWARD_DECLARE_CLASS(Car)
  QT_FORWARD_DECLARE_CLASS(Floor)
  
  
  class
  RoomWidget
      : public QOpenGLWidget
      , protected QOpenGLFunctions
  {
      Q_OBJECT
  
  public:
      explicit RoomWidget(QWidget *parent = nullptr);
      ~RoomWidget() override;
  
  public:
      CGrCamera camera;
      Car*      pCar;
      Floor*    pFloor;
  
  protected:
      void initializeGL() override;
      void resizeGL(int w, int h) override;
      void paintGL() override;
      void mousePressEvent(QMouseEvent *event) override;
      void mouseReleaseEvent(QMouseEvent *event) override;
      void mouseMoveEvent(QMouseEvent *event) override;
      void wheelEvent(QWheelEvent* event) override;
  
      QSize minimumSizeHint() const override;
      QSize sizeHint() const override;
  
      void initShaders();
      void initTextures();
  
  private:
      GeometryEngine*      geometries;
  
      GLuint               roomTexture;
  
      QOpenGLShaderProgram roomProgram;
  
      QMatrix4x4           projectionMatrix;
      QMatrix4x4           orthoMatrix;
      QMatrix4x4           viewMatrix;
      QMatrix4x4           modelMatrix;
  
      qreal                aspect;
      const qreal          zNear;
      const qreal          zFar;
  };
  