sourcescene.h

/****************************************************************************
 * Copyright (c) 2014, Joel Kivelä, Erkki Koskenkorva, Oskari Leppäaho,
 * Mika Lehtinen and Petri Partanen.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of the copyright holders nor the names of its
 *       contributors may be used to endorse or promote products derived from
 *       this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
****************************************************************************/
#ifndef SOURCESCENE_H
#define SOURCESCENE_H

#include <QGLWidget>
#include <QGLFunctions>
#include <QMatrix4x4>
#include <QQuaternion>
#include <QVector2D>
#include <QBasicTimer>
#include <QGLShaderProgram>

#include "common.h"
#include "gridengine.h"
#include "videoengine.h"
#include "calibrationpoints.h"
#include "cavapa/cavapa.h"

namespace cavapa_gui {

class GridEngine;

class SourceScene : public QGLWidget, protected QOpenGLFunctions
{
    Q_OBJECT

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

    float getCameraXRot() { return xRotEuler; }

    float getCameraYRot() { return yRotEuler; }

    float getCameraZRot(){ return zRotEuler; }

    float getCameraHeight(){ return cameraPos.y(); }

    float getCameraFov(){ return fov; }    

    QVector3D getCameraLookDirection();

    QVector3D getCameraPosition();

    cavapa::camera getCameraSettings();

    void setCameraSettings(cavapa::camera settings);

    CalibrationPoints getCalibrationPoints() { return calibrationPoints; }

    void addCalibrationlPoint(QPointF point)
    {
        calibrationPoints.push_back(point);
    }

    void setAddCalibrationPointsEnabled(bool enabled)
    {
        this->isAddCalibrationPointsEnabled = enabled;
    }

    void updateImage(const cv::Mat& image);

public slots:


    void setCameraXRot(float value);


    void setCameraYRot(float value);


    void setCameraZRot(float value);

    void setCameraHeight(float value);

    void setCameraFov(float value);

    void setDrawGridEnabled(bool enabled) { isDrawGridEnabled = enabled; }

    void setDrawCalibrationPointsEnabled(bool enabled) {
        isDrawCalibrationPointsEnabled = enabled;
    }


protected:   

    void mouseReleaseEvent(QMouseEvent *e);

    void mousePressEvent(QMouseEvent *e);

    void timerEvent(QTimerEvent *e);

    void initializeGL();

    void resizeGL(int w, int h);

    void drawBackgroundImage();

    void drawGrid();

    void drawCalibrationPoints(QPainter &painter);

    void paintGL();

    void initShaders();

    //void initTextures();

    inline void setGlViewport();

    void calculateViewPort();

    inline QPointF getRelativeVideoPosition(QPoint widgetPoint);

private slots:

    void handleContextMenuAction(QAction* action);

private:
    QImage background;
    cv::Mat background_mat;

    QBasicTimer timer;              // A timer for updating the scene
    QGLShaderProgram program;
    QGLShaderProgram gridProgram;
    GridEngine geometries;
    VideoEngine videoengine;

    QMatrix4x4 gridProjection;
    QMatrix4x4 videoSurfaceProjection;

    QPoint newCalibrationPointLocation;

    qreal fov;

    QQuaternion cameraYRotation;
    QQuaternion cameraXRotation;
    QQuaternion cameraZRotation;
    QVector3D cameraPos;

    float xRotEuler = 0;
    float yRotEuler = 0;
    float zRotEuler = 0;

    qreal aspect, zNear, zFar;

    bool isDrawGridEnabled = false;
    bool isDrawCalibrationPointsEnabled = false;

    float videoW;
    float videoH;
    int drawAreaX;
    int drawAreaY;

    QRect viewPort;
    CalibrationPoints calibrationPoints;

    QAction* actionAddCalibrationPoint;
    QAction* actionRemoveSelectedCalibrationPoint;
    QAction* actionClearCalibartionPoints;

    bool isAddCalibrationPointsEnabled = false;
};

}

#endif // SOURCESCENE_H