G4FukuiRendererViewer.cc

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// $Id: G4FukuiRendererViewer.cc 66870 2013-01-14 23:38:59Z adotti $
//
// 
// 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