GOpenGLFrame.h

/***************************************************************************
 *   Copyright (C) 2004 - 2006 by Raphael Langerhorst                      *
 *   raphael-langerhorst@gmx.at                                            *
 *                                                                         *
 *   Permission is hereby granted, free of charge, to any person obtaining *
 *   a copy of this software and associated documentation files (the       *
 *   "Software"), to deal in the Software without restriction, including   *
 *   without limitation the rights to use, copy, modify, merge, publish,   *
 *   distribute, sublicense, and/or sell copies of the Software, and to    *
 *   permit persons to whom the Software is furnished to do so, subject to *
 *   the following conditions:                                             *
 *                                                                         *
 *   The above copyright notice and this permission notice shall be        *
 *   included in all copies or substantial portions of the Software.       *
 *                                                                         *
 *   THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       *
 *   EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    *
 *   MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*
 *   IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR     *
 *   OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, *
 *   ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR *
 *   OTHER DEALINGS IN THE SOFTWARE.                                       *
 ***************************************************************************/


#ifndef OPENGLFRAMEH
#define OPENGLFRAMEH

//GCE includes
namespace X3DTK
{
  class SimpleX3DGLScene;
}

//G includes
#include <GForm.h>
#include <GVector3.h>
#include <GElementID.h>
#include <GElement.h>


//Qt includes
#include <qgl.h>
#include <QMutex>
#include <QMap>
#include <QThread>
#include <QList>
#include <QTimer>

namespace GWE
{
  class GInformationInterface;
}


//this belongs to the client engine
namespace GCE
{

class GScene;


class GViewProperties
{
  public:
  
    GViewProperties()
    : ViewPosition(0,0,-1),
      ViewTarget(0,0,0),
      ViewUp(0,1,0),
      fov(90),
      NearClippingPlane(0.01),
      FarClippingPlane(10),
      width(768),
      height(1024),
      CameraElement(0)
    {
    }
  
    GCS::GVector3 ViewPosition;
    GCS::GVector3 ViewTarget;
    GCS::GVector3 ViewUp;
    double fov;
    double NearClippingPlane;
    double FarClippingPlane;
    
    int width, height;
    
    GCS::GElementID CameraElement;
    
    void update()
    {
      glViewport(0,0,width,height);
      glMatrixMode(GL_PROJECTION);
      glLoadIdentity();
      gluPerspective(fov,(double)width/(double)height,NearClippingPlane,FarClippingPlane);
      glMatrixMode(GL_MODELVIEW);
      glLoadIdentity();
    }
};

class GOpenGLFrame : public QGLWidget, public QMutex
{
  Q_OBJECT
  private:
    
    const GWE::GInformationInterface* WorldData;
    
    GScene* Scene;
    
    GCS::GElementID CameraParent;
    
    QList<double> RenderingPeriods;
    
    double FramesPerSecond;
    
    double TimeSinceFpsUpdate;
    
    QTime FpsTimer;
    
  protected:
  
//     void renderElement(const GCS::GElement* element);
    
  protected:
    
//     void transform(const GCS::GForm* form) const;
    
//     void render(const GCS::GForm* form, float* RGBA);
  
    QTimer RedrawTimer;
  
    bool StopRendering;
  
    int RedrawSleepTime_ms;
  
  public:
    
    GViewProperties ViewProperties;

    GOpenGLFrame(const GWE::GInformationInterface* WorldData, GScene* scene, QWidget* parent = 0);

    ~GOpenGLFrame();
    
    GScene* getScene();
    
  public slots:
    
    virtual void startRendering(int sleep_ms_between_updates_min = 20);
    
    virtual void setTimeBetweenRendering(int milliseconds);
    
    virtual void stopRendering();
    
    virtual void initializeGL();
    
    virtual void resizeGL(int w, int h);
    
    virtual void paintGL();
    
  signals:
    
    void beforeRendering();
    
    void afterRendering();

};

}

#endif

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