ViewGeometry.cc

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#include <iostream>
#include <cmath>
 
#include "GeometrySimple.hh"
#include "Solid.hh"
#include "Plotting.hh"
#include "FundamentalConstants.hh"
#include "GarfieldConstants.hh"
#include "ViewGeometry.hh"
 
namespace Garfield {
 
ViewGeometry::ViewGeometry()
    : m_className("ViewGeometry"),
      m_debug(false),
      m_canvas(NULL),
      m_hasExternalCanvas(false),
      m_geometry(NULL),
      m_geoManager(NULL) {
 
  plottingEngine.SetDefaultStyle();
}
 
ViewGeometry::~ViewGeometry() {
 
  if (!m_hasExternalCanvas && m_canvas) delete m_canvas;
  Reset();
}
 
void ViewGeometry::SetGeometry(GeometrySimple* geo) {
 
  if (!geo) {
    std::cerr << m_className << "::SetGeometry: Null pointer.\n";
    return;
  }
 
  m_geometry = geo;
}
 
void ViewGeometry::SetCanvas(TCanvas* c) {
 
  if (!c) return;
  if (!m_hasExternalCanvas && m_canvas) {
    delete m_canvas;
    m_canvas = NULL;
  }
  m_canvas = c;
  m_hasExternalCanvas = true;
}
 
void ViewGeometry::Plot() {
 
  if (!m_geometry) {
    std::cerr << m_className << "::Plot: Geometry is not defined.\n";
    return;
  }
 
  if (!m_canvas) {
    m_canvas = new TCanvas();
    if (m_hasExternalCanvas) m_hasExternalCanvas = false;
  }
  m_canvas->cd();
 
  const unsigned int nSolids = m_geometry->GetNumberOfSolids();
  if (nSolids == 0) {
    std::cerr << m_className << "::Plot: Geometry is empty.\n";
    return;
  }
 
  // Get the bounding box.
  double xMin = 0., yMin = 0., zMin = 0.;
  double xMax = 0., yMax = 0., zMax = 0.; 
  if (!m_geometry->GetBoundingBox(xMin, yMin, zMin, xMax, yMax, zMax)) {
    std::cerr << m_className << "::Plot: Cannot retrieve bounding box.\n";
    return;
  }
  m_geoManager = new TGeoManager("ViewGeometryGeoManager", "");
  TGeoMaterial* matVacuum = new TGeoMaterial("Vacuum", 0., 0., 0.);
  TGeoMedium* medVacuum = new TGeoMedium("Vacuum", 1, matVacuum);
  m_media.push_back(medVacuum);
  // Use silicon as "default" material.
  TGeoMaterial* matDefault = new TGeoMaterial("Default", 28.085, 14., 2.329);
  TGeoMedium* medDefault = new TGeoMedium("Default", 1, matDefault); 
  TGeoVolume* world = m_geoManager->MakeBox("World", medVacuum,
                                            std::max(fabs(xMin), fabs(xMax)),
                                            std::max(fabs(yMin), fabs(yMax)),
                                            std::max(fabs(zMin), fabs(zMax)));
  m_geoManager->SetTopVolume(world);
  m_volumes.push_back(world);
 
  for (unsigned int i = 0; i < nSolids; ++i) {
    Solid* solid = m_geometry->GetSolid(i);
    if (!solid) {
      std::cerr << m_className << "::Plot:\n"
                << "    Could not get solid " << i << " from geometry.\n";
      continue;
    }
    // Get the center coordinates.
    double x0 = 0., y0 = 0., z0 = 0.;
    if (!solid->GetCenter(x0, y0, z0)) {
      std::cerr << m_className << "::Plot:\n"
                << "    Could not determine solid center.\n";
      continue;
    }
    // Get the rotation.
    double ctheta = 1., stheta = 0.;
    double cphi = 1., sphi = 0.;
    if (!solid->GetOrientation(ctheta, stheta, cphi, sphi)) {
      std::cerr << m_className << "::Plot:\n"
                << "    Could not determine solid orientation.\n";
      continue;
    }
    double matrix[9] = {cphi * ctheta, -sphi, cphi * stheta,
                        sphi * ctheta,  cphi, sphi * stheta,
                              -stheta,     0,        ctheta};
    TGeoVolume* volume = NULL;
    if (solid->IsTube()) {
      double rmin = 0., rmax = 0., lz = 0.;
      if (!solid->GetDimensions(rmin, rmax, lz)) {
        std::cerr << m_className << "::Plot:\n"
                  << "    Could not determine tube dimensions.\n";
        continue;
      }
      volume = m_geoManager->MakeTube("Tube", medDefault, rmin, rmax, lz);
    } else if (solid->IsBox()) {
      double dx = 0., dy = 0., dz = 0.;
      if (!solid->GetDimensions(dx, dy, dz)) {
        std::cerr << m_className << "::Plot:\n"
                  << "    Could not determine box dimensions.\n";
        continue;
      }
      volume = m_geoManager->MakeBox("Box", medDefault, dx, dy, dz);
    } else if (solid->IsSphere()) {
      double rmin = 0., rmax = 0., dummy = 0.;
      if (!solid->GetDimensions(rmin, rmax, dummy)) {
        std::cerr << m_className << "::Plot:\n"
                  << "    Could not determine sphere dimensions.\n";
        continue;
      }
      volume = m_geoManager->MakeSphere("Sphere", medDefault, rmin, rmax); 
    } else {
      std::cerr << m_className << "::Plot: Unknown type of solid.\n";
      continue;
    }
    Medium* medium = m_geometry->GetMedium(x0, y0, z0);
    if (!medium) {
      volume->SetLineColor(kGreen + 2);
      volume->SetTransparency(50);
    } else if (medium->IsGas()) {
      volume->SetLineColor(kBlue + medium->GetId());
      volume->SetTransparency(50);
    } else if (medium->IsSemiconductor()) {
      volume->SetLineColor(kRed + medium->GetId());
      volume->SetTransparency(50);
    } else {
      volume->SetLineColor(kViolet + medium->GetId());
      volume->SetTransparency(0);
    } 
    TGeoRotation r;
    r.SetMatrix(matrix);
    TGeoTranslation t(x0, y0, z0);
    TGeoCombiTrans* transform = new TGeoCombiTrans(t, r);
    m_volumes.push_back(volume);
    m_geoManager->GetTopVolume()->AddNode(volume, 1, transform);
  }
  m_geoManager->CloseGeometry();
  m_geoManager->GetTopNode()->Draw("ogl");
 
}
 
void ViewGeometry::Reset() {
 
 for (std::vector<TGeoVolume*>::iterator it = m_volumes.begin();
      it != m_volumes.end(); ++it) {
    if (*it) {
      TGeoShape* shape = (*it)->GetShape();
      if (shape) delete shape;
      delete *it;
    }
  }
  m_volumes.clear();
  for (std::vector<TGeoMedium*>::iterator it = m_media.begin();
       it != m_media.end(); ++it) {
    if (*it) {
      TGeoMaterial* material = (*it)->GetMaterial();
      if (material) delete material;
      delete *it;
    }
  }
  m_media.clear();
 
  if (m_geoManager) {
    delete m_geoManager;
    m_geoManager = NULL;
  }
 
}
 
}