G4VRML1FileSceneHandler.cc

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// $Id: G4VRML1FileSceneHandler.cc 105186 2017-07-14 12:02:06Z gcosmo $
//
// G4VRML1FileSceneHandler.cc
// Satoshi Tanaka & Yasuhide Sawada


//#define DEBUG_FR_SCENE

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

#include "globals.hh"
#include "G4VisManager.hh"
#include "G4Scene.hh"
#include "G4VPhysicalVolume.hh"
#include "G4LogicalVolume.hh"
#include "G4Point3D.hh"
#include "G4VisAttributes.hh"
#include "G4Polyhedron.hh"
#include "G4Box.hh"
#include "G4Cons.hh"
#include "G4Polyline.hh"
#include "G4Trd.hh"
#include "G4Tubs.hh"
#include "G4Trap.hh"
#include "G4Para.hh"
#include "G4Torus.hh"
#include "G4Sphere.hh"
#include "G4Text.hh"
#include "G4Circle.hh"
#include "G4Square.hh"

#include "G4VRML1FileSceneHandler.hh"
#include "G4VRML1FileViewer.hh"
#include "G4VRML1File.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 ;

G4VRML1FileSceneHandler::G4VRML1FileSceneHandler(G4VRML1File& system, const G4String& name) :
    G4VSceneHandler(system, fSceneIdCount++, name),
    fSystem(system),
    fDest()   ,
    fFlagDestOpen( false ) 
{
    fCurrentDEF = "";
    strcpy(fVRMLFileName, "");

    if ( getenv( VRMLFILE_DEST_DIR ) == NULL ) {
        strcpy( fVRMLFileDestDir, "" );
    } else {
        strcpy( fVRMLFileDestDir, getenv( VRMLFILE_DEST_DIR ) );
    }

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

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

}


G4VRML1FileSceneHandler::~G4VRML1FileSceneHandler()
{
#if defined DEBUG_FR_SCENE
  if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
    G4cout << "***** ~G4VRML1FileSceneHandler" << G4endl;
#endif 
    VRMLEndModeling();
}


#define  G4VRML1SCENEHANDLER   G4VRML1FileSceneHandler
#define  IS_CONNECTED   this->isConnected() 
#include "G4VRML1SceneHandlerFunc.icc"
#undef   IS_CONNECTED
#undef   G4VRML1SCENEHANDLER


void G4VRML1FileSceneHandler::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 VRML1FILE 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));

        // 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 1.0 file with determined file name
    if (G4VisManager::GetVerbosity() >= G4VisManager::errors) {
      G4cout << "==========================================="  << G4endl; 
      G4cout << "Output VRML 1.0 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 G4VRML1FileSceneHandler::closePort()
{
    char command[256] ;
    char viewer [256] ; 
    strcpy( viewer, NO_VRML_VIEWER ); // initialization
    if( getenv( ENV_VRML_VIEWER ) ) {
        strcpy( viewer, getenv( ENV_VRML_VIEWER ) ) ;
    }

    // close VRML file  
    fDest.close();  fFlagDestOpen = false ;
    if (G4VisManager::GetVerbosity() >= G4VisManager::errors)
      G4cout << "*** VRML 1.0 File  " << fVRMLFileName << "  is generated." << G4endl;

    
    // Invoke viewer 

    if ( !strcmp(viewer, NO_VRML_VIEWER )) {
      if (G4VisManager::GetVerbosity() >= G4VisManager::errors) {
        G4cout << "MESSAGE from VRML1FILE 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 << "  vrweb " << G4endl;
      }
    } else {
        std::ostringstream ossCommand;
        ossCommand << viewer << ' ' << fVRMLFileName;
        strncpy(command,ossCommand.str().c_str(),sizeof(command));
        (void) system( command );
    }
}

G4int G4VRML1FileSceneHandler::fSceneIdCount = 0;