source: GTP/trunk/Lib/Vis/Preprocessing/src/QtGlRenderer.h @ 1743

#ifndef __QTGLRENDERER_H
#define __QTGLRENDERER_H

#include <QtOpenGL>
#include <QWaitCondition>

//#include <QGLPixelBuffer>

#include "Vector3.h"
#include "Containers.h"
#include "Halton.h"
#include "Renderer.h"
#include "GlRenderer.h"
#include "Beam.h"
#include "QtPreprocessorThread.h"
class QWidget;
//class QtPreprocessorThread;

namespace GtpVisibilityPreprocessor {

class SceneGraph;
class ViewCellsManager;
class Mesh;
class MeshInstance;
class Intersectable;
class Material;
class Beam;
class KdTree;
class GlRendererBuffer;
class BeamSampleStatistics;
class OcclusionQuery;
class TransformedMeshInstance;


struct VssRayContainer;
struct PvsRenderStatistics; 
struct RenderCostSample;


class QtGlRendererBuffer : public QObject, public QGLPixelBuffer, public GlRendererBuffer
{
        Q_OBJECT
public:
        QtGlRendererBuffer(const int w,
                const int h,
                SceneGraph *sceneGraph,
                ViewCellsManager *viewcells,
                KdTree *tree);

        ~QtGlRendererBuffer();

        /** Evaluates render cost of a point sample.
        @param sample the render cost sample to be evaluated
        @param useOcclusionQueries if occlusion queries should be used or item buffer
        @param threshold number of pixels / samples from where an object is considered visible.
        */
        void EvalRenderCostSample(RenderCostSample &sample,
                const bool useOcclusionQueries,
                const int threshold);

        /** Evaluates render cost of a number of point samples. The point samples
        are distributed uniformly over the defined view space.

        @param numSamples the number of point samples taken
        @param samples stores the taken point samples in a container
        @param useOcclusionQueries if occlusion queries should be used or item buffer
        @param threshold number of pixels / samples from where an object is considered visible.
        */
        void SampleRenderCost(const int numSamples, 
                vector<RenderCostSample> &samples,
                const bool useOcclusionQueries,
                const int threshold = 0);


  void
  EvalPvsStat();

  void
  ClearErrorBuffer();
  

  virtual int GetWidth() const { return width(); }
  virtual int GetHeight() const { return height(); }


 
  void SampleBeamContributions(
                                                           Intersectable *sourceObject,
                                                           Beam &beam,
                                                           const int samples,
                                                           BeamSampleStatistics &stat
                                                           );

  void
  SampleViewpointContributions(
                                                           Intersectable *sourceObject,
                                                           const Vector3 viewPoint,
                                                           Beam &beam,
                                                           const int desiredSamples,
                                                           BeamSampleStatistics &stat
                                                           );

  void InitGL();

  /** Computes rays from information gained with hw sampling-
  */
  void ComputeRays(Intersectable *sourceObj, VssRayContainer &rays);

  int ComputePvs() const;

  float
  GetPixelError(int &pvsSize);

  int ComputePvs(ObjectContainer &objects, ObjectContainer &pvs) const;
     
   
private:
        
        void SetupProjectionForViewPoint(const Vector3 &viewPoint, 
                                                                         const Beam &beam, 
                                                                         Intersectable *sourceObject);


public:
  signals:
        void UpdatePvsErrorItem(int i, GlRendererBuffer::PvsErrorEntry &);
};


class QtRendererControlWidget : public QWidget
{
  Q_OBJECT
public:

  QListWidget *mPvsErrorWidget;

  QtRendererControlWidget(QWidget * parent = 0, Qt::WFlags f = 0);

  public slots:

  void FocusNextPvsErrorFrame();
  void UpdatePvsErrorItem(int i,
                                                  GlRendererBuffer::PvsErrorEntry &);

  signals:

  void ComputeVisibility();
  void StopComputation();
  void UpdateAllPvs();
  void SetViewCellGranularity(int);
  void SetTransferFunction(int);
  void SetSceneCut(int);
  void SetTopDistance(int);
  void SetVisibilityFilterSize(int);
  void SetSpatialFilterSize(int);

  void SetShowRays(bool);
  void SetRenderFilter(bool);
  void SetRenderVisibilityEstimates(bool);
  void SetUseFilter(bool);
  void SetUseSpatialFilter(bool);
  void SetRenderErrors(bool);
  void SetRenderBoxes(bool);
  void SetShowViewCells(bool);
  void SetShowRenderCost(bool);
  void SetShowPvsSizes(bool);
  void SetTopView(bool);
  void SetCutViewCells(bool);
  void SetCutScene(bool);

};


struct PvsCache {
  PvsCache():mViewCell(NULL) {}
  Reset() { mViewCell = NULL; mPvs.Clear(); }
  ViewCell *mViewCell;
  ObjectPvs mPvs;
};

class QtGlRendererWidget : public QGLWidget, public GlRendererWidget
{
  Q_OBJECT
public:

  // point of the last mouse click used for movement in the scene
  Vector3 mousePoint;

  bool mTopView;
  bool mRenderViewCells;
  bool mCutViewCells;
  bool mCutScene;
  bool mRenderErrors;
  bool mRenderFilter;
  bool mRenderVisibilityEstimates;
  bool mUseFilter;
  bool mUseSpatialFilter;
  bool mShowRenderCost;
  bool mShowRays;

  bool mShowPvsSizes;
  float mSpatialFilterSize;
  
  Plane3 mSceneCutPlane;
  float mTopDistance;

  // some statistics
  int mPvsSize;
  float mRenderError;
  float mTransferFunction;

  float mManipulatorLastQuat[4];
  float mManipulatorScale;
  PvsCache mPvsCache;
  
  QtRendererControlWidget *mControlWidget;

  QtPreprocessorThread *mPreprocessorThread;
  
  QtGlRendererWidget(SceneGraph *sceneGraph,
                                         ViewCellsManager *viewcells,
                                         KdTree *tree,
                                         QWidget * parent = 0, const QGLWidget * shareWidget = 0, Qt::WFlags f = 0
                                         );
  
  QtGlRendererWidget() {};

  void SetThread(QtPreprocessorThread *t) {
        mPreprocessorThread = t;
  }
  void
  RenderRenderCost();

  virtual void SetupCamera();
  // setup a transformation for manipulator
  void
  SetupManipulator();

  void initializeGL() {
        InitGL();
  }
  void resizeGL(int w, int h);
  void paintGL();
  void timerEvent(QTimerEvent *) {
          update();
  }

  void mousePressEvent(QMouseEvent *);
  void mouseReleaseEvent(QMouseEvent *);
  void mouseMoveEvent(QMouseEvent *);

  void keyPressEvent ( QKeyEvent * e ) ;

  void
  RenderPvs();

  float
  RenderErrors();
  void
  RenderInfo();

  virtual int GetWidth() const { return width(); }
  virtual int GetHeight() const { return height(); }

  // virtual void
  //  SetupProjection(const int w, const int h, const float angle = 70.0f);

  virtual void
  SetupCameraProjection(const int w, const int h, const float angle = 70.0f);

  virtual void
  SetupManipulatorProjection(const int w, const int h, const float angle = 70.0f);

  void
  RenderViewCells();


  virtual void Show() {
        show();
  }

 public slots:

 void UpdateAllPvs();
  void ComputeVisibility();
  void StopComputation();

 void SetRenderErrors(bool b) {
   mRenderErrors = b;
   updateGL();
 }

  void SetRenderBoxes(bool b) {
        mRenderBoxes = b;
        updateGL();
  }

 void SetRenderFilter(bool b) {
   mRenderFilter = b;
   updateGL();
 }

  void SetRenderVisibilityEstimates(bool b) {
        mRenderVisibilityEstimates = b;
   updateGL();
 }

  void SetUseFilter(bool b) {
   mUseFilter = b;
   mPvsCache.Reset();
   updateGL();
 }

  void SetUseSpatialFilter(bool b) {
        mUseSpatialFilter = b;
        mPvsCache.Reset();
        updateGL();
  }

  
  void
  SetViewCellGranularity(int number);

  void
  SetTransferFunction(int number) {
        mTransferFunction = number/1000.0f;
        updateGL();
  }

  void
  SetVisibilityFilterSize(int number);

  void
  SetSpatialFilterSize(int number);
  
  void
  SetSceneCut(int cut);
  
  void
  SetTopDistance(int dist);
  
  void SetShowViewCells(bool b) {
        mRenderViewCells = b;
        updateGL();
  }

  void SetShowRays(bool b) {
        mShowRays = b;
        updateGL();
  }

  void SetShowRenderCost(bool b) {
        mShowRenderCost = b;
        updateGL();
  }

  void SetShowPvsSizes(bool b) {
        mShowPvsSizes = b;
        updateGL();
  }

  void SetTopView(bool b) {
        mTopView = b;
        updateGL();
  }

  void SetCutViewCells(bool b) {
        mCutViewCells = b;
        updateGL();
  }
  void SetCutScene(bool b) {
        mCutScene = b;
        updateGL();
  }


};


class QtGlDebuggerWidget : public QGLWidget
{
        Q_OBJECT
public:
    QtGlDebuggerWidget(QtGlRendererBuffer *buf, QWidget *parent = NULL);
    ~QtGlDebuggerWidget();
    void initializeGL();
    void resizeGL(int w, int h);
    void paintGL();
    void timerEvent(QTimerEvent *) { update(); }
    void mousePressEvent(QMouseEvent *) { killTimer(timerId); }
    void mouseReleaseEvent(QMouseEvent *) { timerId = startTimer(20); }

    void initCommon();
    void initPbuffer();

  
         QtGlRendererBuffer *mRenderBuffer;

         Beam mBeam;
         int mSamples;
         Intersectable *mSourceObject;

private:
    GLuint dynamicTexture;
    int timerId;
};

extern QtGlDebuggerWidget *debuggerWidget;

};

#endif