G4VRML2FileSceneHandler.cc

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// G4VRML2FileSceneHandler.cc
// Satoshi Tanaka & Yasuhide Sawada


//#define DEBUG_FR_SCENE

#include <fstream>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <cmath>
#include <sstream>
#include <iomanip>

#include "globals.hh"
#include "G4VPhysicalVolume.hh"
#include "G4LogicalVolume.hh"
#include "G4VisManager.hh"
#include "G4Point3D.hh"
#include "G4VisAttributes.hh"
#include "G4VModel.hh"
#include "G4Scene.hh"
#include "G4Polyhedron.hh"
#include "G4Box.hh"
#include "G4Cons.hh"
#include "G4Polyline.hh"
#include "G4Trd.hh"
#include "G4Tubs.hh"
#include "G4Text.hh"
#include "G4Circle.hh"
#include "G4Square.hh"

#include "G4VRML2FileSceneHandler.hh"
#include "G4VRML2FileViewer.hh"
#include "G4VRML2File.hh"

// CONST

const char  WRL_FILE_HEADER      [] = "g4_";
const char  DEFAULT_WRL_FILE_NAME[] = "g4.wrl";
const char  ENV_VRML_VIEWER      [] = "G4VRMLFILE_VIEWER";
const char  NO_VRML_VIEWER       [] = "NONE";
const char  VRMLFILE_DEST_DIR    [] = "G4VRMLFILE_DEST_DIR";
const int   DEFAULT_MAX_WRL_FILE_NUM = 100 ;


G4VRML2FileSceneHandler::G4VRML2FileSceneHandler(G4VRML2File& system, const G4String& name) :
  G4VSceneHandler(system, fSceneIdCount++, name),
  fSystem(system),
  fFlagDestOpen( false ),
  fPVPickable  ( false ),
        fDest()
{
  // output file name
  strcpy(fVRMLFileName, "");

  // destination directory
  if ( std::getenv( VRMLFILE_DEST_DIR ) == NULL ) {
    strcpy( fVRMLFileDestDir, "" );
  } else {
    strcpy( fVRMLFileDestDir, std::getenv( VRMLFILE_DEST_DIR ) );
  }


  // maximum number of g4.prim files in the dest directory
  fMaxFileNum = DEFAULT_MAX_WRL_FILE_NUM ; // initialization
  if ( std::getenv( "G4VRMLFILE_MAX_FILE_NUM" ) != NULL ) { 
    
    sscanf( std::getenv("G4VRMLFILE_MAX_FILE_NUM"), "%d", &fMaxFileNum ) ;

  } else {
    fMaxFileNum = DEFAULT_MAX_WRL_FILE_NUM ;
  }
  if( fMaxFileNum < 1 ) { fMaxFileNum = 1; }


  // PV name pickability  
  if( std::getenv( "G4VRML_PV_PICKABLE" ) != NULL ) {

    int is_pickable ;
    sscanf( std::getenv("G4VRML_PV_PICKABLE"), "%d", &is_pickable ) ;

    if ( is_pickable ) { SetPVPickability ( true ) ; }
  } 

  // PV Transparency
  SetPVTransparency ();

}


G4VRML2FileSceneHandler::~G4VRML2FileSceneHandler()
{
#if defined DEBUG_FR_SCENE
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
  G4cout << "***** ~G4VRML2FileSceneHandler" << G4endl;
#endif 
  VRMLEndModeling();
}


#define  G4VRML2SCENEHANDLER   G4VRML2FileSceneHandler
#define  IS_CONNECTED   this->isConnected() 
#include "G4VRML2SceneHandlerFunc.icc"
#undef   IS_CONNECTED
#undef   G4VRML2SCENEHANDLER


void G4VRML2FileSceneHandler::connectPort()
{
  // g4_00.wrl, g4_01.wrl, ..., g4_MAX_FILE_INDEX.wrl
  const int MAX_FILE_INDEX = fMaxFileNum - 1 ;

  // dest directory (null if no environmental variables is set)
  strcpy ( fVRMLFileName, fVRMLFileDestDir) ; 

  // create full path name (default)
  strcat ( fVRMLFileName, DEFAULT_WRL_FILE_NAME );

  // Determine VRML file name
  for( int i = 0 ; i < fMaxFileNum ; i++) { 

    // Message in the final execution
    if( i == MAX_FILE_INDEX ) 
    {
      if (G4VisManager::GetVerbosity() >= G4VisManager::errors) {
        G4cout << "==========================================="   << G4endl; 
        G4cout << "WARNING MESSAGE from VRML2FILE driver:     "   << G4endl;
        G4cout << "  This file name is the final one in the   "   << G4endl;
        G4cout << "  automatic updation of the output file name." << G4endl; 
        G4cout << "  You may overwrite existing files, i.e.   "   << G4endl; 
        G4cout << "  g4_XX.wrl.                               "   << G4endl;
        G4cout << "==========================================="   << G4endl; 
      }
    }

    // re-determine file name as G4VRMLFILE_DEST_DIR/g4_XX.wrl 
    std::ostringstream filename;
    filename
    << fVRMLFileDestDir << WRL_FILE_HEADER
    << std::setw(2) << std::setfill('0') << i << ".wrl";
    strncpy(fVRMLFileName,filename.str().c_str(),sizeof(fVRMLFileName)-1);
                fVRMLFileName[sizeof(fVRMLFileName)-1] = '\0';

    // check validity of the file name
    std::ifstream  fin ; 
    fin.open(fVRMLFileName) ;
    if(!fin) { 
      // new file 
      fin.close();  
      break; 
    } else { 
      // already exists (try next) 
      fin.close(); 
    } 

  } // for 

  // open a VRML 2.0 file with determined file name
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors) {
    G4cout << "==========================================="  << G4endl; 
    G4cout << "Output VRML 2.0 file: " <<    fVRMLFileName << G4endl; 
    G4cout << "Maximum number of files in the destination directory: " << fMaxFileNum << G4endl; 
    G4cout << "  (Customizable with the environment variable: G4VRMLFILE_MAX_FILE_NUM) " << G4endl;
    G4cout << "===========================================" << G4endl; 
  }
  fDest.open(fVRMLFileName) ;  fFlagDestOpen =  true ;
}


void G4VRML2FileSceneHandler::closePort()
{
  char command[256] ;
  char viewer [256] ; 
  strcpy( viewer, NO_VRML_VIEWER ); // initialization
  if( std::getenv( ENV_VRML_VIEWER ) ) {
    strcpy( viewer, std::getenv( ENV_VRML_VIEWER ) ) ;
  }

  // close VRML file  
  fDest.close();  fFlagDestOpen = false ;
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
        G4cout << "*** VRML 2.0 File  " << fVRMLFileName << "  is generated." << G4endl;

  
  // Invoke viewer 

  if ( !strcmp(viewer, NO_VRML_VIEWER )) {
    if (G4VisManager::GetVerbosity() >= G4VisManager::errors) {
    G4cout << "MESSAGE from VRML2FILE driver:"     << G4endl;
    G4cout << "    Set an environmental variable  " ;
    G4cout <<      ENV_VRML_VIEWER << G4endl;
    G4cout << "    if you want to visualize the generated VRML file" << G4endl; 
    G4cout << "    automatically.  For example, " << G4endl;
    G4cout << "    setenv  " << ENV_VRML_VIEWER << "  vrwave " << G4endl;
    }
  } else {
    std::ostringstream ossCommand;
    ossCommand << viewer << ' ' << fVRMLFileName;
    strncpy(command,ossCommand.str().c_str(),sizeof(command)-1);
                command[sizeof(command)-1] = '\0';
    (void) system( command );
  }
}

G4int G4VRML2FileSceneHandler::fSceneIdCount = 0;