Gabriele Cosmo
285 lines
9.2 KiB
C++
285 lines
9.2 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 and of QinetiQ Ltd, *
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// * subject to DEFCON 705 IPR conditions. *
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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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// $Id$
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//
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// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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//
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// CHANGE HISTORY
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// --------------
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//
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// 31 October 2004, P R Truscott, QinetiQ Ltd, UK - Created.
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// 12 October 2012, M Gayer, CERN
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// New implementation reducing memory requirements by 50%,
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// and considerable CPU speedup together with the new
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// implementation of G4TessellatedSolid.
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//
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// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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#include "G4QuadrangularFacet.hh"
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#include "geomdefs.hh"
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#include "Randomize.hh"
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using namespace std;
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///////////////////////////////////////////////////////////////////////////////
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//
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// !!!THIS IS A FUDGE!!! IT'S TWO ADJACENT G4TRIANGULARFACETS
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// --- NOT EFFICIENT BUT PRACTICAL.
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//
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G4QuadrangularFacet::G4QuadrangularFacet (const G4ThreeVector &vt0,
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const G4ThreeVector &vt1,
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const G4ThreeVector &vt2,
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const G4ThreeVector &vt3,
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G4FacetVertexType vertexType)
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{
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G4ThreeVector e1, e2, e3;
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SetVertex(0, vt0);
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if (vertexType == ABSOLUTE)
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{
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SetVertex(1, vt1);
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SetVertex(2, vt2);
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SetVertex(3, vt3);
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e1 = vt1 - vt0;
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e2 = vt2 - vt0;
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e3 = vt3 - vt0;
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}
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else
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{
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SetVertex(1, vt0 + vt1);
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SetVertex(2, vt0 + vt2);
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SetVertex(3, vt0 + vt3);
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e1 = vt1;
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e2 = vt2;
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e3 = vt3;
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}
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G4double length1 = e1.mag();
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G4double length2 = (GetVertex(2)-GetVertex(1)).mag();
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G4double length3 = (GetVertex(3)-GetVertex(2)).mag();
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G4double length4 = e3.mag();
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G4ThreeVector normal1 = e1.cross(e2).unit();
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G4ThreeVector normal2 = e2.cross(e3).unit();
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bool isDefined = (length1 > kCarTolerance && length2 > kCarTolerance &&
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length3 > kCarTolerance && length4 > kCarTolerance &&
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normal1.dot(normal2) >= 0.9999999999);
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if (isDefined)
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{
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fFacet1 = G4TriangularFacet (GetVertex(0),GetVertex(1),
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GetVertex(2),ABSOLUTE);
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fFacet2 = G4TriangularFacet (GetVertex(0),GetVertex(2),
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GetVertex(3),ABSOLUTE);
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G4TriangularFacet facet3 (GetVertex(0),GetVertex(1),GetVertex(3),ABSOLUTE);
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G4TriangularFacet facet4 (GetVertex(1),GetVertex(2),GetVertex(3),ABSOLUTE);
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G4ThreeVector normal12 = fFacet1.GetSurfaceNormal()
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+ fFacet2.GetSurfaceNormal();
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G4ThreeVector normal34 = facet3.GetSurfaceNormal()
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+ facet4.GetSurfaceNormal();
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G4ThreeVector normal = 0.25 * (normal12 + normal34);
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fFacet1.SetSurfaceNormal (normal);
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fFacet2.SetSurfaceNormal (normal);
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G4ThreeVector vtmp = 0.5 * (e1 + e2);
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fCircumcentre = GetVertex(0) + vtmp;
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G4double radiusSqr = vtmp.mag2();
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fRadius = std::sqrt(radiusSqr);
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}
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else
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{
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G4Exception("G4QuadrangularFacet::G4QuadrangularFacet()",
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"GeomSolids0002", JustWarning,
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"Length of sides of facet are too small or sides not planar.");
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G4cerr << endl;
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G4cerr << "P0 = " << GetVertex(0) << endl;
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G4cerr << "P1 = " << GetVertex(1) << endl;
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G4cerr << "P2 = " << GetVertex(2) << endl;
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G4cerr << "P3 = " << GetVertex(3) << endl;
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G4cerr << "Side lengths = P0->P1" << length1 << endl;
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G4cerr << "Side lengths = P1->P2" << length2 << endl;
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G4cerr << "Side lengths = P2->P3" << length3 << endl;
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G4cerr << "Side lengths = P3->P0" << length4 << endl;
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G4cerr << endl;
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fRadius = 0.0;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4QuadrangularFacet::~G4QuadrangularFacet ()
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{
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4QuadrangularFacet::G4QuadrangularFacet (const G4QuadrangularFacet &rhs)
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: G4VFacet(rhs)
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{
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fFacet1 = rhs.fFacet1;
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fFacet2 = rhs.fFacet2;
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fRadius = 0.0;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4QuadrangularFacet &
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G4QuadrangularFacet::operator=(const G4QuadrangularFacet &rhs)
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{
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if (this == &rhs)
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return *this;
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fFacet1 = rhs.fFacet1;
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fFacet2 = rhs.fFacet2;
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fRadius = 0.0;
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return *this;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4VFacet *G4QuadrangularFacet::GetClone ()
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{
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G4QuadrangularFacet *c = new G4QuadrangularFacet (GetVertex(0), GetVertex(1),
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GetVertex(2), GetVertex(3),
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ABSOLUTE);
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return c;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4ThreeVector G4QuadrangularFacet::Distance (const G4ThreeVector &p)
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{
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G4ThreeVector v1 = fFacet1.Distance(p);
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G4ThreeVector v2 = fFacet2.Distance(p);
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if (v1.mag2() < v2.mag2()) return v1;
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else return v2;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4double G4QuadrangularFacet::Distance (const G4ThreeVector &p,
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G4double)
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{
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G4double dist = Distance(p).mag();
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return dist;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4double G4QuadrangularFacet::Distance (const G4ThreeVector &p, G4double,
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const G4bool outgoing)
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{
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G4double dist;
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G4ThreeVector v = Distance(p);
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G4double dir = v.dot(GetSurfaceNormal());
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if ( ((dir > dirTolerance) && (!outgoing))
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|| ((dir < -dirTolerance) && outgoing))
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dist = kInfinity;
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else
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dist = v.mag();
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return dist;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4double G4QuadrangularFacet::Extent (const G4ThreeVector axis)
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{
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G4double ss = 0;
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for (G4int i = 0; i <= 3; ++i)
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{
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G4double sp = GetVertex(i).dot(axis);
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if (sp > ss) ss = sp;
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}
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return ss;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4bool G4QuadrangularFacet::Intersect (const G4ThreeVector &p,
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const G4ThreeVector &v,
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G4bool outgoing,
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G4double &distance,
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G4double &distFromSurface,
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G4ThreeVector &normal)
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{
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G4bool intersect =
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fFacet1.Intersect(p,v,outgoing,distance,distFromSurface,normal);
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if (!intersect) intersect =
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fFacet2.Intersect(p,v,outgoing,distance,distFromSurface,normal);
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if (!intersect)
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{
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distance = distFromSurface = kInfinity;
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normal.set(0,0,0);
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}
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return intersect;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// Auxiliary method to get a random point on surface
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//
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G4ThreeVector G4QuadrangularFacet::GetPointOnFace() const
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{
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G4ThreeVector pr = (G4RandFlat::shoot(0.,1.) < 0.5)
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? fFacet1.GetPointOnFace() : fFacet2.GetPointOnFace();
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return pr;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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// Auxiliary method for returning the surface area
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//
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G4double G4QuadrangularFacet::GetArea()
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{
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G4double area = fFacet1.GetArea() + fFacet2.GetArea();
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return area;
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4String G4QuadrangularFacet::GetEntityType () const
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{
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return "G4QuadrangularFacet";
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}
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///////////////////////////////////////////////////////////////////////////////
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//
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G4ThreeVector G4QuadrangularFacet::GetSurfaceNormal () const
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{
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return fFacet1.GetSurfaceNormal();
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}
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