Gabriele Cosmo
130 lines
4.8 KiB
C++
130 lines
4.8 KiB
C++
//
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// ********************************************************************
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// * DISCLAIMER *
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// * *
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// * The following disclaimer summarizes all the specific disclaimers *
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// * of contributors to this software. The specific disclaimers,which *
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// * govern, are listed with their locations in: *
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// * http://cern.ch/geant4/license *
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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. *
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// * *
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// * This code implementation is the intellectual property of the *
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// * GEANT4 collaboration. *
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// * By copying, distributing or modifying the Program (or any work *
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// * based on the Program) you indicate your acceptance of this *
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// * statement, and all its terms. *
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// ********************************************************************
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//
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//
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// $Id: G4ClippablePolygon.hh,v 1.7 2002/10/28 11:47:49 gcosmo Exp $
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// GEANT4 tag $Name: geant4-05-00 $
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//
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//
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// --------------------------------------------------------------------
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// GEANT 4 class header file
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//
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// G4ClippablePolygon
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//
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// Class description:
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//
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// Declaration of a utility class of a polygon that can be
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// clipped by a voxel.
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// Author:
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// David C. Williams (davidw@scipp.ucsc.edu)
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// --------------------------------------------------------------------
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#ifndef G4ClippablePolygon_hh
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#define G4ClippablePolygon_hh
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#include "g4std/vector"
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#include "globals.hh"
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#include "geomdefs.hh"
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#include "G4ThreeVector.hh"
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class G4VoxelLimits;
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class G4AffineTransform;
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class G4AffineTransform;
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class G4VoxelLimits;
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class G4ClippablePolygon
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{
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typedef G4std::vector<G4ThreeVector> G4ThreeVectorList;
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public: // with description
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G4ClippablePolygon();
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virtual ~G4ClippablePolygon();
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// Constructor & virtual destructor.
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virtual void AddVertexInOrder( const G4ThreeVector vertex );
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virtual void ClearAllVertices();
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inline void SetNormal( const G4ThreeVector &newNormal );
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inline const G4ThreeVector GetNormal() const;
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virtual G4bool Clip( const G4VoxelLimits &voxelLimit );
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virtual G4bool PartialClip( const G4VoxelLimits &voxelLimit,
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const EAxis IgnoreMe );
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// Clip, while ignoring the indicated axis.
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virtual void ClipAlongOneAxis( const G4VoxelLimits &voxelLimit,
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const EAxis axis );
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// Clip along just one axis, as specified in voxelLimit.
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virtual G4bool GetExtent( const EAxis axis,
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G4double &min, G4double &max ) const;
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virtual const G4ThreeVector *GetMinPoint( const EAxis axis ) const;
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// Returns pointer to minimum point along the specified axis.
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// Take care! Do not use pointer after destroying parent polygon.
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virtual const G4ThreeVector *GetMaxPoint( const EAxis axis ) const;
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// Returns pointer to maximum point along the specified axis.
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// Take care! Do not use pointer after destroying parent polygon.
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inline G4int GetNumVertices() const;
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inline G4bool Empty() const;
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virtual G4bool InFrontOf( const G4ClippablePolygon &other, EAxis axis ) const;
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// Decide if the polygon is in "front" of another when
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// viewed along the specified axis. For our purposes here,
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// it is sufficient to use the minimum extent of the
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// polygon along the axis to determine this.
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virtual G4bool BehindOf( const G4ClippablePolygon &other, EAxis axis ) const;
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// Decide if this polygon is behind another.
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// Remarks in method "InFrontOf" are valid here too.
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virtual G4bool GetPlanerExtent( const G4ThreeVector &pointOnPlane,
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const G4ThreeVector &planeNormal,
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G4double &min, G4double &max ) const;
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// Get min/max distance in or out of a plane.
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protected: // with description
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void ClipToSimpleLimits( G4ThreeVectorList& pPolygon,
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G4ThreeVectorList& outputPolygon,
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const G4VoxelLimits& pVoxelLimit );
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// pVoxelLimits must be only limited along one axis, and either
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// the maximum along the axis must be +kInfinity, or the minimum
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// -kInfinity
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protected:
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G4ThreeVectorList vertices;
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G4ThreeVector normal;
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};
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#include "G4ClippablePolygon.icc"
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#endif
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