Gabriele Cosmo
255 lines
8.1 KiB
C++
255 lines
8.1 KiB
C++
//
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// ********************************************************************
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// * License and Disclaimer *
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// * *
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// * The Geant4 software is copyright of the Copyright Holders of *
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// * the Geant4 Collaboration. It is provided under the terms and *
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// * conditions of the Geant4 Software License, included in the file *
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// * LICENSE and available at http://cern.ch/geant4/license . These *
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// * include a list of copyright holders. *
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// * *
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// * Neither the authors of this software system, nor their employing *
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// * institutes,nor the agencies providing financial support for this *
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// * work make any representation or warranty, express or implied, *
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// * regarding this software system or assume any liability for its *
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// * use. Please see the license in the file LICENSE and URL above *
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// * for the full disclaimer and the limitation of liability. *
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// * *
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// * This code implementation is the result of the scientific and *
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// * technical work of the GEANT4 collaboration. *
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// * By using, copying, modifying or distributing the software (or *
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// * any work based on the software) you agree to acknowledge its *
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// * use in resulting scientific publications, and indicate your *
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// * acceptance of all terms of the Geant4 Software license. *
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// ********************************************************************
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//
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//
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//
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// Implementation for G4UTet wrapper class
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// --------------------------------------------------------------------
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#include "G4Tet.hh"
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#include "G4UTet.hh"
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#if ( defined(G4GEOM_USE_USOLIDS) || defined(G4GEOM_USE_PARTIAL_USOLIDS) )
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#include "G4AffineTransform.hh"
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#include "G4VPVParameterisation.hh"
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#include "G4BoundingEnvelope.hh"
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using namespace CLHEP;
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////////////////////////////////////////////////////////////////////////
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//
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// Constructor - create a tetrahedron
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// This class is implemented separately from general polyhedra,
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// because the simplex geometry can be computed very quickly,
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// which may become important in situations imported from mesh generators,
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// in which a very large number of G4Tets are created.
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// A Tet has all of its geometrical information precomputed
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//
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G4UTet::G4UTet(const G4String& pName,
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G4ThreeVector anchor,
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G4ThreeVector p2,
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G4ThreeVector p3,
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G4ThreeVector p4, G4bool* degeneracyFlag)
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: Base_t(pName, U3Vector(anchor.x(),anchor.y(),anchor.z()),
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U3Vector(p2.x(), p2.y(), p2.z()),
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U3Vector(p3.x(), p3.y(), p3.z()),
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U3Vector(p4.x(), p4.y(), p4.z()))
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{
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G4double fXMin=std::min(std::min(std::min(anchor.x(), p2.x()),p3.x()),p4.x());
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G4double fXMax=std::max(std::max(std::max(anchor.x(), p2.x()),p3.x()),p4.x());
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G4double fYMin=std::min(std::min(std::min(anchor.y(), p2.y()),p3.y()),p4.y());
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G4double fYMax=std::max(std::max(std::max(anchor.y(), p2.y()),p3.y()),p4.y());
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G4double fZMin=std::min(std::min(std::min(anchor.z(), p2.z()),p3.z()),p4.z());
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G4double fZMax=std::max(std::max(std::max(anchor.z(), p2.z()),p3.z()),p4.z());
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G4ThreeVector fMiddle=G4ThreeVector(fXMax+fXMin,fYMax+fYMin,fZMax+fZMin)*0.5;
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G4double fMaxSize=std::max(std::max(std::max((anchor-fMiddle).mag(),
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(p2-fMiddle).mag()),
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(p3-fMiddle).mag()),
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(p4-fMiddle).mag());
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// fV<x><y> is vector from vertex <y> to vertex <x>
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//
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G4ThreeVector fV21=p2-anchor;
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G4ThreeVector fV31=p3-anchor;
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G4ThreeVector fV41=p4-anchor;
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// make sure this is a correctly oriented set of points for the tetrahedron
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//
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G4double signed_vol=fV21.cross(fV31).dot(fV41);
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G4bool degenerate=std::fabs(signed_vol) < 1e-9*fMaxSize*fMaxSize*fMaxSize;
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if(degeneracyFlag) *degeneracyFlag=degenerate;
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else if (degenerate)
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{
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G4Exception("G4UTet::G4UTet()", "GeomSolids0002", FatalException,
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"Degenerate tetrahedron not allowed.");
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}
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// Fake default constructor - sets only member data and allocates memory
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// for usage restricted to object persistency.
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//
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G4UTet::G4UTet( __void__& a )
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: Base_t(a)
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{
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// Destructor
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//
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G4UTet::~G4UTet()
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{
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// Copy constructor
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//
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G4UTet::G4UTet(const G4UTet& rhs)
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: Base_t(rhs)
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{
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// Assignment operator
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//
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G4UTet& G4UTet::operator = (const G4UTet& rhs)
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{
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// Check assignment to self
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//
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if (this == &rhs) { return *this; }
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// Copy base class data
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//
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Base_t::operator=(rhs);
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return *this;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// Accessors
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//
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std::vector<G4ThreeVector> G4UTet::GetVertices() const
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{
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std::vector<U3Vector> vec(4);
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Base_t::GetVertices(vec[0], vec[1], vec[2], vec[3]);
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std::vector<G4ThreeVector> vertices;
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for (unsigned int i=0; i<4; ++i)
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{
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G4ThreeVector v(vec[i].x(), vec[i].y(), vec[i].z());
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vertices.push_back(v);
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}
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return vertices;
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// Get bounding box
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void G4UTet::BoundingLimits(G4ThreeVector& pMin, G4ThreeVector& pMax) const
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{
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U3Vector vmin, vmax;
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Base_t::Extent(vmin,vmax);
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pMin.set(vmin.x(),vmin.y(),vmin.z());
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pMax.set(vmax.x(),vmax.y(),vmax.z());
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// Check correctness of the bounding box
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//
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if (pMin.x() >= pMax.x() || pMin.y() >= pMax.y() || pMin.z() >= pMax.z())
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{
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std::ostringstream message;
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message << "Bad bounding box (min >= max) for solid: "
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<< GetName() << " !"
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<< "\npMin = " << pMin
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<< "\npMax = " << pMax;
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G4Exception("G4UTet::BoundingLimits()", "GeomMgt0001",
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JustWarning, message);
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StreamInfo(G4cout);
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}
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}
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//////////////////////////////////////////////////////////////////////////
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//
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// Calculate extent under transform and specified limit
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G4bool
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G4UTet::CalculateExtent(const EAxis pAxis,
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const G4VoxelLimits& pVoxelLimit,
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const G4AffineTransform& pTransform,
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G4double& pMin, G4double& pMax) const
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{
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G4ThreeVector bmin, bmax;
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// Check bounding box (bbox)
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//
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BoundingLimits(bmin,bmax);
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G4BoundingEnvelope bbox(bmin,bmax);
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// Use simple bounding-box to help in the case of complex 3D meshes
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//
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return bbox.CalculateExtent(pAxis,pVoxelLimit,pTransform,pMin,pMax);
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#if 0
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// Precise extent computation (disabled by default for this shape)
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//
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G4bool exist;
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if (bbox.BoundingBoxVsVoxelLimits(pAxis,pVoxelLimit,pTransform,pMin,pMax))
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{
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return exist = (pMin < pMax) ? true : false;
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}
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// Set bounding envelope (benv) and calculate extent
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//
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std::vector<G4ThreeVector> vec = GetVertices();
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G4ThreeVectorList anchor(1);
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anchor[0] = vec[0];
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G4ThreeVectorList base(3);
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base[0] = vec[1];
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base[1] = vec[2];
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base[2] = vec[3];
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std::vector<const G4ThreeVectorList *> polygons(2);
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polygons[0] = &anchor;
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polygons[1] = &base;
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G4BoundingEnvelope benv(bmin,bmax,polygons);
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return exists = benv.CalculateExtent(pAxis,pVoxelLimit,pTransform,pMin,pMax);
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#endif
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}
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////////////////////////////////////////////////////////////////////////
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//
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// CreatePolyhedron
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//
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G4Polyhedron* G4UTet::CreatePolyhedron() const
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{
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std::vector<U3Vector> vec(4);
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Base_t::GetVertices(vec[0], vec[1], vec[2], vec[3]);
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G4double xyz[4][3];
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const G4int faces[4][4] = {{1,3,2,0},{1,4,3,0},{1,2,4,0},{2,3,4,0}};
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for (unsigned int i=0; i<4; ++i)
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{
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xyz[i][0] = vec[i].x();
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xyz[i][1] = vec[i].y();
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xyz[i][2] = vec[i].z();
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}
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G4Polyhedron *ph = new G4Polyhedron;
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ph->createPolyhedron(4,4,xyz,faces);
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return ph;
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}
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#endif // G4GEOM_USE_USOLIDS
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