Gabriele Cosmo
128 lines
4.8 KiB
C++
128 lines
4.8 KiB
C++
//
|
|
// ********************************************************************
|
|
// * License and Disclaimer *
|
|
// * *
|
|
// * The Geant4 software is copyright of the Copyright Holders of *
|
|
// * the Geant4 Collaboration. It is provided under the terms and *
|
|
// * conditions of the Geant4 Software License, included in the file *
|
|
// * LICENSE and available at http://cern.ch/geant4/license . These *
|
|
// * include a list of copyright holders. *
|
|
// * *
|
|
// * Neither the authors of this software system, nor their employing *
|
|
// * institutes,nor the agencies providing financial support for this *
|
|
// * work make any representation or warranty, express or implied, *
|
|
// * regarding this software system or assume any liability for its *
|
|
// * use. Please see the license in the file LICENSE and URL above *
|
|
// * for the full disclaimer and the limitation of liability. *
|
|
// * *
|
|
// * This code implementation is the result of the scientific and *
|
|
// * technical work of the GEANT4 collaboration. *
|
|
// * By using, copying, modifying or distributing the software (or *
|
|
// * any work based on the software) you agree to acknowledge its *
|
|
// * use in resulting scientific publications, and indicate your *
|
|
// * acceptance of all terms of the Geant4 Software license. *
|
|
// ********************************************************************
|
|
//
|
|
//
|
|
//
|
|
//
|
|
// --------------------------------------------------------------------
|
|
// GEANT 4 class header file
|
|
//
|
|
// G4ClippablePolygon
|
|
//
|
|
// Class description:
|
|
//
|
|
// Declaration of a utility class of a polygon that can be
|
|
// clipped by a voxel.
|
|
|
|
// Author:
|
|
// David C. Williams (davidw@scipp.ucsc.edu)
|
|
// --------------------------------------------------------------------
|
|
#ifndef G4ClippablePolygon_hh
|
|
#define G4ClippablePolygon_hh
|
|
|
|
#include <vector>
|
|
|
|
#include "G4Types.hh"
|
|
#include "geomdefs.hh"
|
|
#include "G4ThreeVector.hh"
|
|
|
|
class G4AffineTransform;
|
|
class G4VoxelLimits;
|
|
|
|
class G4ClippablePolygon
|
|
{
|
|
typedef std::vector<G4ThreeVector> G4ThreeVectorList;
|
|
|
|
public: // with description
|
|
|
|
G4ClippablePolygon();
|
|
virtual ~G4ClippablePolygon();
|
|
// Constructor & virtual destructor.
|
|
|
|
virtual void AddVertexInOrder( const G4ThreeVector vertex );
|
|
virtual void ClearAllVertices();
|
|
|
|
inline void SetNormal( const G4ThreeVector &newNormal );
|
|
inline const G4ThreeVector GetNormal() const;
|
|
|
|
virtual G4bool Clip( const G4VoxelLimits &voxelLimit );
|
|
|
|
virtual G4bool PartialClip( const G4VoxelLimits &voxelLimit,
|
|
const EAxis IgnoreMe );
|
|
// Clip, while ignoring the indicated axis.
|
|
|
|
virtual void ClipAlongOneAxis( const G4VoxelLimits &voxelLimit,
|
|
const EAxis axis );
|
|
// Clip along just one axis, as specified in voxelLimit.
|
|
|
|
virtual G4bool GetExtent( const EAxis axis,
|
|
G4double &min, G4double &max ) const;
|
|
|
|
virtual const G4ThreeVector *GetMinPoint( const EAxis axis ) const;
|
|
// Returns pointer to minimum point along the specified axis.
|
|
// Take care! Do not use pointer after destroying parent polygon.
|
|
|
|
virtual const G4ThreeVector *GetMaxPoint( const EAxis axis ) const;
|
|
// Returns pointer to maximum point along the specified axis.
|
|
// Take care! Do not use pointer after destroying parent polygon.
|
|
|
|
inline G4int GetNumVertices() const;
|
|
inline G4bool Empty() const;
|
|
|
|
virtual G4bool InFrontOf( const G4ClippablePolygon &other, EAxis axis ) const;
|
|
// Decide if the polygon is in "front" of another when
|
|
// viewed along the specified axis. For our purposes here,
|
|
// it is sufficient to use the minimum extent of the
|
|
// polygon along the axis to determine this.
|
|
|
|
virtual G4bool BehindOf( const G4ClippablePolygon &other, EAxis axis ) const;
|
|
// Decide if this polygon is behind another.
|
|
// Remarks in method "InFrontOf" are valid here too.
|
|
|
|
virtual G4bool GetPlanerExtent( const G4ThreeVector &pointOnPlane,
|
|
const G4ThreeVector &planeNormal,
|
|
G4double &min, G4double &max ) const;
|
|
// Get min/max distance in or out of a plane.
|
|
|
|
protected: // with description
|
|
|
|
void ClipToSimpleLimits( G4ThreeVectorList& pPolygon,
|
|
G4ThreeVectorList& outputPolygon,
|
|
const G4VoxelLimits& pVoxelLimit );
|
|
// pVoxelLimits must be only limited along one axis, and either
|
|
// the maximum along the axis must be +kInfinity, or the minimum
|
|
// -kInfinity
|
|
|
|
protected:
|
|
|
|
G4ThreeVectorList vertices;
|
|
G4ThreeVector normal;
|
|
G4double kCarTolerance;
|
|
};
|
|
|
|
#include "G4ClippablePolygon.icc"
|
|
|
|
#endif
|