G4FukuiRendererViewer.cc

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// $Id$
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// 
// Satoshi TANAKA, Fri Jun 28 12:09:11 JST 1996
// FukuiRenderer view - opens window, hard copy, etc.


//=================//
#ifdef G4VIS_BUILD_DAWN_DRIVER
//=================//

#define __G_ANSI_C__
#define G4FukuiRenderer_STRUCTURE_PRIORITY  1.

// #define DEBUG_FR_VIEW

#include "G4ios.hh"
#include <stdio.h>
#include <string.h>
#include <assert.h>

#include "G4VisManager.hh"
#include "G4Scene.hh"
#include "G4Vector3D.hh"
#include "G4VisExtent.hh"
#include "G4LogicalVolume.hh"
#include "G4VSolid.hh"
#include "G4PhysicalConstants.hh"

#include "G4FRConst.hh"
#include "G4FukuiRenderer.hh"
#include "G4FukuiRendererSceneHandler.hh"
#include "G4FukuiRendererViewer.hh"


//----- Constructor
G4FukuiRendererViewer::G4FukuiRendererViewer (G4FukuiRendererSceneHandler& sceneHandler,
                                          const G4String& name): 
  G4VViewer (sceneHandler,
             sceneHandler.IncrementViewCount (),
             name),
  fSceneHandler (sceneHandler)
{}

//----- Destructor
G4FukuiRendererViewer::~G4FukuiRendererViewer () 
{}

//----- 
void G4FukuiRendererViewer::SetView () 
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
    G4cout << "***** G4FukuiRendererViewer::SetView(): No effects" << G4endl;
#endif 
// Do nothing, since DAWN is running as a different process.
// SendViewParameters () will do this job instead.
}

//----- 
void
G4FukuiRendererViewer::ClearView( void )
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
    G4cout << "***** G4FukuiRendererViewer::ClearView (): No effects " << G4endl;
#endif

}


//----- 
void G4FukuiRendererViewer::DrawView () 
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
        G4cout << "***** G4FukuiRendererViewer::DrawView () " << G4endl;
#endif

        //----- Begin modeling 3D 
        fSceneHandler.FRBeginModeling();        

        //----- Always visit G4 kernel 
        NeedKernelVisit ();
                                   
        //----- Draw
        ProcessView () ;

} 


//----- 
void G4FukuiRendererViewer::ShowView( void )
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
        G4cout << "***** G4FukuiRendererViewer::ShowView () " << G4endl;
#endif

        if( fSceneHandler.FRIsInModeling() ) 
        {
                        //----- End of modeling
                        // !EndModeling, !DrawAll, !CloseDevice,
                        // close g4.prim
                fSceneHandler.FREndModeling();

                        //----- Wait user clicks drawing Area
                this->Wait();
        }

} 


//----- 
void  G4FukuiRendererViewer::Wait()
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
        G4cout << "***** G4FukuiRendererViewer::Wait () : Begin" << G4endl;
#endif
  fSceneHandler.SendStr    ( FR_WAIT );
  fSceneHandler.GetPrimDest().WaitSendBack( FR_WAIT );
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
        G4cout << "***** G4FukuiRendererViewer::Wait () : end" << G4endl;
#endif

}


//----- 
void
G4FukuiRendererViewer::SendDevice( FRDEV dev )
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
        G4cout << "***** G4FukuiRendererViewer::SendDevice() " << G4endl;
#endif

  //    enum {PS=1, XWIN=2, PS2=3, XWIN2=4, OPEN_GL=5, DEVICE_END=6};
  
        if( dev >= FRDEV_PS || dev < FRDEV_DEVICE_END ) {
                fSceneHandler.SendStrInt ( FR_DEVICE, dev );
        }
}


//----- 
void  G4FukuiRendererViewer::SendDrawingStyle() 
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
        G4cout << "***** G4FukuiRendererViewer::SendDrawingStyle() " << G4endl;
#endif

        G4int  style = fVP.GetDrawingStyle();

        switch( style )
        {
          case G4ViewParameters::wireframe: 
                fSceneHandler.SendStr( FR_WIREFRAME );
                break;
          case G4ViewParameters::hlr:
                fSceneHandler.SendStr( FR_LINES     );
                break;
          case G4ViewParameters::hsr:
          case G4ViewParameters::hlhsr:
                fSceneHandler.SendStr( FR_SURFACE   );
                break;
          default:
                fSceneHandler.SendStr( FR_WIREFRAME );
                break;
        }

} 


//----- 
void G4FukuiRendererViewer::SendViewParameters () 
{
  // Calculates view representation based on extent of object being
  // viewed and (initial) direction of camera.  (Note: it can change
  // later due to user interaction via visualization system's GUI.)

#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
    G4cout << "***** G4FukuiRendererViewer::SendViewParameters()" << G4endl;
#endif 

                //----- Magic number to decide camera distance automatically
        const    G4double        HOW_FAR            = 1000.0       ; // to define "infinity"
        const    G4double        MIN_HALF_ANGLE     = 0.01         ;
        const    G4double        MAX_HALF_ANGLE     = 0.499 * pi ;

                //----- (2A) CALC camera distance
                //..... Note: Camera cannot enter inside object
        G4double  camera_distance ;
        G4double  radius = fSceneHandler.GetScene()->GetExtent().GetExtentRadius();

        G4double half_view_angle  = std::fabs ( fVP.GetFieldHalfAngle () ) ;
        if( half_view_angle > MAX_HALF_ANGLE ) { 
          half_view_angle = MAX_HALF_ANGLE ; 
        } 

        if( half_view_angle < MIN_HALF_ANGLE ) {
                        //----- infinity (or ortho projection)
                camera_distance = radius * HOW_FAR ;  
        } else {
                        //----- Calc camera distance from half view angle
                camera_distance = radius / std::sin ( half_view_angle );
                camera_distance -= fVP.GetDolly();
        }

        if ( camera_distance < radius ) { 
          if (G4VisManager::GetVerbosity() >= G4VisManager::errors) {
                G4cout << "WARNING from FukuiRenderer (DAWN) driver:" << G4endl;
                G4cout << "  Camera cannot enter inside objects"      << G4endl;
          }
                camera_distance = radius ; 
        }

                //----- (3A) CALC camera direction
        const G4Vector3D& camera_direction \
          = fVP.GetViewpointDirection().unit();
        const G4double v_angle =  (180.0 / pi) * camera_direction.theta() ;
        const G4double h_angle =  (180.0 / pi) * camera_direction.phi  () ;

                //----- (2B), (3B) SEND camera position
        fSceneHandler.SendStrDouble3( FR_CAMERA_POSITION, 
                               camera_distance, 
                               v_angle, 
                               h_angle ); 

                //----- (4A) CALC target point
        const G4Point3D&  target_point
          = fSceneHandler.GetScene()->GetStandardTargetPoint()
          + fVP.GetCurrentTargetPoint();

                //----- (4B) SEND target point
        fSceneHandler.SendStrDouble3( FR_TARGET_POINT, 
                               target_point.x(), 
                               target_point.y(), 
                               target_point.z() );

                //----- (5A) CALC zoom factor
        const G4double   zoom_factor  = fVP.GetZoomFactor();

                //----- (5B) SEND zoom factor or focal length
        if( half_view_angle < MIN_HALF_ANGLE ) {

                const G4Point3D&  std_target_point \
                        = fSceneHandler.GetScene()->GetStandardTargetPoint();

                fSceneHandler.SendStrDouble4( FR_ZOOM_FACTOR, 
                                       zoom_factor ,
                                       std_target_point.x(), 
                                       std_target_point.y(), 
                                       std_target_point.z());
                        // Note that target point, camera position, 
                        // and bounding box have already been sent above.
                        // The std_target_point is necessary to
                        // Calc focal distance from the zoom factor.
        } else {
                const G4double FR_HALF_SCREEN_SIZE = 0.5 ;
                G4double  focal_distance \
                  = FR_HALF_SCREEN_SIZE / std::tan( half_view_angle ); 
                focal_distance *= zoom_factor ;
                fSceneHandler.SendStrDouble ( FR_FOCAL_DISTANCE, focal_distance );
        }

                //----- INVOKE GUI: not executed in the default setting
        if( fSceneHandler.GetSystem().IsGUIMode() ) {
                        //----- send GUI command
                fSceneHandler.SendStr( FR_GUI );

                        //----- wait the same command is sent back:
                        //..... This avoids to send many data before
                        //..... GUI session is over.
                fSceneHandler.GetPrimDest().WaitSendBack( FR_GUI );
        }

} 

#endif // G4VIS_BUILD_DAWN_DRIVER

---