G4DAWNFILEViewer.cc

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// $Id: G4DAWNFILEViewer.cc 66870 2013-01-14 23:38:59Z adotti $
//
// Satoshi TANAKA
// DAWNFILE view - opens window, hard copy, etc.


#define __G_ANSI_C__
#define G4DAWNFILE_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 "G4DAWNFILE.hh"
#include "G4DAWNFILESceneHandler.hh"
#include "G4DAWNFILEViewer.hh"



    //----- constants
const char  FR_ENV_MULTI_WINDOW [] = "G4DAWN_MULTI_WINDOW" ;
const char  FR_ENV_MULTI_WINDOW2[] = "G4DAWNFILE_MULTI_WINDOW" ;

    //----- G4DAWNFILEViewer, constructor
G4DAWNFILEViewer::G4DAWNFILEViewer (G4DAWNFILESceneHandler& sceneHandler,
                const G4String& name): 
  G4VViewer (sceneHandler,
         sceneHandler.IncrementViewCount (),
         name),
  fSceneHandler (sceneHandler)
{
    // Set a g4.prim-file viewer 
    strcpy( fG4PrimViewer, "dawn" ); 
    if( getenv( "G4DAWNFILE_VIEWER" ) != NULL ) {
        strcpy( fG4PrimViewer, getenv( "G4DAWNFILE_VIEWER" ) ) ;            
    } 

    // string for viewer invocation
    if ( !strcmp( fG4PrimViewer, "NONE" ) ) {
        
        strcpy( fG4PrimViewerInvocation, "" );
    } else {

        strcpy( fG4PrimViewerInvocation, fG4PrimViewer );
        strcat( fG4PrimViewerInvocation, " ");
        strcat( fG4PrimViewerInvocation, fSceneHandler.GetG4PrimFileName() );
    }

    // Set a PostScript Viewer
//  strcpy( fPSViewer, "ghostview" ); 
    strcpy( fPSViewer, "gv" ); 
    if( getenv( "G4DAWNFILE_PS_VIEWER" ) != NULL ) {
        strcpy( fPSViewer, getenv( "G4DAWNFILE_PS_VIEWER" ) ) ;         
    } 

}

    //----- G4DAWNFILEViewer, destructor
G4DAWNFILEViewer::~G4DAWNFILEViewer () 
{}

    //----- G4DAWNFILEViewer::SetView () 
void G4DAWNFILEViewer::SetView () 
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
    G4cout << "***** G4DAWNFILEViewer::SetView(): No effects" << G4endl;
#endif 
// Do nothing, since DAWN is running as a different process.
// SendViewParameters () will do this job instead.
}


    //----- G4DAWNFILEViewer::ClearView()
void
G4DAWNFILEViewer::ClearView( void )
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
    G4cout << "***** G4DAWNFILEViewer::ClearView (): No effects " << G4endl;
#endif
    if (fSceneHandler.fPrimDest.IsOpen()) {
      fSceneHandler.fPrimDest.Close();
      // Re-open with same filename...
      fSceneHandler.fPrimDest.Open(fSceneHandler.fG4PrimFileName);
      fSceneHandler.SendStr( FR_G4_PRIM_HEADER );
      fSceneHandler.FRflag_in_modeling = false;
      fSceneHandler.FRBeginModeling();
    }
}


    //----- G4DAWNFILEViewer::DrawView () 
void G4DAWNFILEViewer::DrawView () 
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
    G4cout << "***** G4DAWNFILEViewer::DrawView () " << G4endl;
#endif
        //----- 
    fSceneHandler.FRBeginModeling() ;

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

} // G4DAWNFILEViewer::DrawView () 



    //----- G4DAWNFILEViewer::ShowView()
void G4DAWNFILEViewer::ShowView( void )
{
#if defined DEBUG_FR_VIEW
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
    G4cout << "***** G4DAWNFILEViewer::ShowView () " << G4endl;
#endif

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

            //----- Output DAWN GUI file 
        SendViewParameters(); 

            //----- string for viewer invocation
        if ( !strcmp( fG4PrimViewer, "NONE" ) ) {
        
            strcpy( fG4PrimViewerInvocation, "" );
        } else {

            strcpy( fG4PrimViewerInvocation, fG4PrimViewer );
            strcat( fG4PrimViewerInvocation, " ");
            strcat( fG4PrimViewerInvocation, fSceneHandler.GetG4PrimFileName() );
        }


        //----- Invoke DAWN
        G4cout << G4endl ;
        if( false == G4FRofstream::DoesFileExist( fSceneHandler.GetG4PrimFileName() ) )   
        {
            G4cout << "ERROR: Failed to generate file  ";
            G4cout << fSceneHandler.GetG4PrimFileName() << G4endl;

        } else  if( strcmp( GetG4PrimViewerInvocation(), "" ) )  
        {
            G4cout << "File  " << fSceneHandler.GetG4PrimFileName() ;
            G4cout << "  is generated." << G4endl;
            G4cout << GetG4PrimViewerInvocation() << G4endl;
            (void) system( GetG4PrimViewerInvocation() );

        } else { // no view, i.e., only file generation
            G4cout << "File  " << fSceneHandler.GetG4PrimFileName() ; 
            G4cout << "  is generated." << G4endl;
            G4cout << "No viewer is invoked." << G4endl;
        }

    }

} // G4DAWNFILEViewer::ShowView()


    //----- G4DAWNFILEViewer::SendDrawingStyleToDAWNGUI( std::ostream& out ) 
void  G4DAWNFILEViewer::SendDrawingStyleToDAWNGUI( std::ostream& out ) 
{
///////////////////////
//#if defined DEBUG_FR_VIEW
//  G4cout << "***** G4DAWNFILEViewer::SendDrawingStyleToDAWNGUI()" << G4endl;
//#endif
//////////////////////

    G4int  style = fVP.GetDrawingStyle();

    enum {  FR_WIREFRAME_STYLE = 1, FR_WF_STORED_STYLE = 2,
        FR_HID_STYLE       = 3, FR_HID2_STYLE      = 4,
        FR_HID3_STYLE      = 5, FR_DRAWING_MODE_END_STYLE = 6 };

    switch( style )
    {
      case G4ViewParameters::wireframe: 
        out <<  FR_WIREFRAME_STYLE << G4endl;
        break;
      case G4ViewParameters::hlr:
        out <<  FR_HID2_STYLE      << G4endl; // LINE
        break;
      case G4ViewParameters::hsr:
      case G4ViewParameters::hlhsr:
        out <<  FR_HID_STYLE       << G4endl; // SURFACE
        break;
      default:
        out <<  FR_WIREFRAME_STYLE << G4endl;
        break;
    }

} // G4DAWNFILEViewer::SendDrawingStyle()  



//----- 
void G4DAWNFILEViewer::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 << "***** G4DAWNFILEViewer::SendViewParameters()  "; 
    G4cout << "(GUI parameters)" << 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 ;

        //----- 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 DAWNFILE driver:" << G4endl;
        G4cout << "  Camera cannot enter inside objects"      << G4endl;
      }
        camera_distance = radius ; 
    }

        //----- 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  () ;


    //########### Generation of the file .DAWN.history for DAWN GUI
        //-----
    std::ofstream gui_out (".DAWN_1.history") ; 

    // ######### P1 

        //----- camera position
    gui_out << camera_distance << G4endl;
    gui_out << v_angle  << G4endl ;
        gui_out << h_angle  << G4endl ;
        gui_out << "0"  << G4endl     ; // auto target

        //----- target point 
    const G4Point3D&  target_point
      = fSceneHandler.GetScene()->GetStandardTargetPoint()
      + fVP.GetCurrentTargetPoint();
    gui_out << target_point.x()          << G4endl ;
    gui_out << target_point.y()          << G4endl ;
    gui_out << target_point.z()          << G4endl ;

        //----- Magnification
    const G4double   zoom_factor  = fVP.GetZoomFactor();
    if( half_view_angle < MIN_HALF_ANGLE ) {

        gui_out << zoom_factor << G4endl;

    } 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 ;

        gui_out << "fd" << focal_distance << G4endl;

    }
    SendDrawingStyleToDAWNGUI( gui_out ) ; // gui_out, viewing mode
    gui_out << "0.001" << G4endl           ; // 3D Tolerance 
    gui_out << "0"     << G4endl           ; // not display parameters


    // ######### P2
    gui_out << 1 << G4endl;   // Source light 
    gui_out << 1 << G4endl;   
    gui_out << 1 << G4endl;   
    gui_out << 0.5 << G4endl; // Ambient light
    gui_out << 0.5 << G4endl;
    gui_out << 0.5 << G4endl;
    gui_out << 19.0 << G4endl; // Light direction (Polar)
    gui_out << 71.0 << G4endl; // Light direction (Azimuthal)

    // ######### P3
    gui_out << 0.1 << G4endl;    // Real edge width
    gui_out << 0.1 << G4endl;    // outline   width
    gui_out << 0.1 << G4endl;    // aux edge  width
    gui_out << 3   << G4endl;      // aux edge  style
    gui_out << 70.0<< G4endl;   // aux-edge threshold angle
    gui_out << 0.1 << G4endl;       // line width
    gui_out << 0   << G4endl;        // haloing
    gui_out << 1   << G4endl;        // Dashed edged for back faces

    //######### P4
               //----- drawing device
  //    enum {PS=1, XWIN=2, PS2=3, XWIN2=4, OPEN_GL=5, DEVICE_END=6};
        if( ( ( getenv( FR_ENV_MULTI_WINDOW ) != NULL        ) && \
              ( strcmp( getenv( FR_ENV_MULTI_WINDOW ),"0"  ) )       ) || \
            ( ( getenv( FR_ENV_MULTI_WINDOW2 ) != NULL        ) && \
              ( strcmp( getenv( FR_ENV_MULTI_WINDOW2 ),"0"  ) )      )     )
        {
                gui_out << 2 << G4endl; // OpenWindow
        } else {
                gui_out << 1 << G4endl; // Invoke PS viewer
        }

    gui_out << GetPSViewer() << G4endl; // PS viewer
    gui_out << 1 << G4endl            ; // Do not add showpage 
    gui_out << 0 << G4endl            ; // Non-append mode

    gui_out.close();
    //########### end of generating file .DAWN.history 


}