#pragma once

#include "geometryengine.h"

#include <QOpenGLWidget>
#include <QOpenGLFunctions>
#include <QMatrix4x4>
#include <QQuaternion>
#include <QVector2D>
#include <QBasicTimer>
#include <QOpenGLShaderProgram>
#include <QOpenGLTexture>

class GeometryEngine;

class OglViewerWidget : public QOpenGLWidget, protected QOpenGLFunctions
{
	Q_OBJECT

public:
	explicit OglViewerWidget(QWidget *parent = 0);
	~OglViewerWidget();

protected:
	void mousePressEvent(QMouseEvent *e) Q_DECL_OVERRIDE;
	void mouseReleaseEvent(QMouseEvent *e) Q_DECL_OVERRIDE;
	void timerEvent(QTimerEvent *e) Q_DECL_OVERRIDE;

	void initializeGL() Q_DECL_OVERRIDE;
	void resizeGL(int w, int h) Q_DECL_OVERRIDE;
	void paintGL() Q_DECL_OVERRIDE;

	void initShaders();
	void initTextures();

private:
	QBasicTimer timer;
	QOpenGLShaderProgram program;
	GeometryEngine *geometries;

	QOpenGLTexture *texture;

	QMatrix4x4 projection;

	QVector2D mousePressPosition;
	QVector3D rotationAxis;
	qreal angularSpeed;
	QQuaternion rotation;
};