Gabriele Cosmo
120 lines
4.8 KiB
C++
120 lines
4.8 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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// $Id:
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// GEANT4 tag $Name: geant4-09-02 $
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//
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// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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//
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// MODULE: G4TessellatedGeometryAlgorithms.hh
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//
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// Date: 07/08/2005
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// Author: Rickard Holmberg & Pete Truscott
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// Organisation: QinetiQ Ltd, UK (PT)
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// Customer: ESA-ESTEC / TEC-EES
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// Contract:
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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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// 07 August 2007, P R Truscott, QinetiQ Ltd, UK - Created, with member
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// functions based on the work of Rickard Holmberg.
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//
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// %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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//
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// Class description:
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//
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// The G4TessellatedGeometryAlgorithms class is used to contain standard
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// routines to determine whether (and if so where) simple geometric shapes
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// intersect.
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//
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// The constructor doesn't need to do anything, and neither does the
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// destructor.
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//
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// IntersectLineAndTriangle2D
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// Determines whether there is an intersection between a line defined
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// by r = p + s.v and a triangle defined by verticies P0, P0+E0 and P0+E1.
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// Here:
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// p = 2D vector
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// s = scaler on [0,infinity)
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// v = 2D vector
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// P0, E0 and E1 are 2D vectors
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// Information about where the intersection occurs is returned in the
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// variable location.
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//
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// IntersectLineAndLineSegment2D
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// Determines whether there is an intersection between a line defined
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// by r = P0 + s.D0 and a line-segment with endpoints P1 and P1+D1.
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// Here:
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// P0 = 2D vector
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// s = scaler on [0,infinity)
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// D0 = 2D vector
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// P1 and D1 are 2D vectors
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// Information about where the intersection occurs is returned in the
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// variable location.
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///////////////////////////////////////////////////////////////////////////////
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#ifndef G4TessellatedGeometryAlgorithms_hh
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#define G4TessellatedGeometryAlgorithms_hh 1
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#include "globals.hh"
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#include "G4TwoVector.hh"
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class G4TessellatedGeometryAlgorithms
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{
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public: // with description
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static G4TessellatedGeometryAlgorithms* GetInstance();
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G4bool IntersectLineAndTriangle2D (const G4TwoVector p,
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const G4TwoVector v,
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const G4TwoVector P0,
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const G4TwoVector E0,
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const G4TwoVector E1,
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G4TwoVector location[2]);
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G4int IntersectLineAndLineSegment2D (const G4TwoVector P0,
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const G4TwoVector D0,
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const G4TwoVector P1,
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const G4TwoVector D1,
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G4TwoVector location[2]);
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inline G4double cross(const G4TwoVector v1, const G4TwoVector v2) const;
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protected:
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G4TessellatedGeometryAlgorithms();
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private:
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static G4TessellatedGeometryAlgorithms *fInstance;
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};
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#include "G4TessellatedGeometryAlgorithms.icc"
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#endif
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