Gabriele Cosmo
552 lines
18 KiB
C++
552 lines
18 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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//
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// class G4UAdapter
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//
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// Class description:
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//
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// Utility class for adapting VecGeom solids API to Geant4 solids.
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// NOTE: Using protected inheritance since the Adapter is supposed to
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// be a G4VSolid "implemented-in-terms-of" the VecGeom UnplacedVolume_t.
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// The choice of protected vs private is due to the fact that we want
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// to propagate functions further down in the inheritance hierarchy.
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// Author:
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// 17.05.17 G.Cosmo: Adapted for G4VSolid from original G4USolids bridge
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// class and the USolidsAdapter class in VecGeom.
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// ------------------------------------------------------------------------
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#ifndef G4UADAPTER_HH
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#define G4UADAPTER_HH
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#include "G4ThreeVector.hh"
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#include "G4VSolid.hh"
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// Required for inline visualization adapter functions
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//
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#include "G4AffineTransform.hh"
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#include "G4VoxelLimits.hh"
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#include "G4VGraphicsScene.hh"
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#include "G4Polyhedron.hh"
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#include "G4VisExtent.hh"
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#include "G4BoundingEnvelope.hh"
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#include "G4AutoLock.hh"
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#if ( defined(G4GEOM_USE_USOLIDS) || defined(G4GEOM_USE_PARTIAL_USOLIDS) )
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#include <base/Global.h>
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#include <base/Vector3D.h>
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class G4VPVParameterisation;
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template <class UnplacedVolume_t>
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class G4UAdapter : public G4VSolid, protected UnplacedVolume_t
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{
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public:
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typedef vecgeom::Vector3D<G4double> U3Vector;
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using UnplacedVolume_t::operator delete;
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using UnplacedVolume_t::operator new;
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// VecGeom volumes have special delete/new ("AlignedBase")
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// and we need to make these functions public again
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G4UAdapter(const G4String& name)
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: G4VSolid(name), fRebuildPolyhedron(false), fPolyhedron(0)
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{ kHalfTolerance = 0.5*kCarTolerance; }
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template <typename... T>
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G4UAdapter(const G4String& name, const T &... params)
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: G4VSolid(name), UnplacedVolume_t(params...),
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fRebuildPolyhedron(false), fPolyhedron(0)
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{ kHalfTolerance = 0.5*kCarTolerance; }
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virtual ~G4UAdapter();
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G4bool operator==(const G4UAdapter& s) const;
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// Return true only if addresses are the same.
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virtual G4bool 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 override;
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// Calculate the minimum and maximum extent of the solid, when under the
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// specified transform, and within the specified limits. If the solid
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// is not intersected by the region, return false, else return true.
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virtual EInside Inside(const G4ThreeVector& p) const override;
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// Returns kOutside if the point at offset p is outside the shapes
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// boundaries plus Tolerance/2, kSurface if the point is <= Tolerance/2
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// from a surface, otherwise kInside.
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virtual G4ThreeVector SurfaceNormal(const G4ThreeVector& p) const override;
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// Returns the outwards pointing unit normal of the shape for the
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// surface closest to the point at offset p.
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virtual G4double DistanceToIn(const G4ThreeVector& p,
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const G4ThreeVector& v) const override;
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// Return the distance along the normalised vector v to the shape,
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// from the point at offset p. If there is no intersection, return
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// kInfinity. The first intersection resulting from `leaving' a
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// surface/volume is discarded. Hence, it is tolerant of points on
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// the surface of the shape.
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virtual G4double DistanceToIn(const G4ThreeVector& p) const override;
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// Calculate the distance to the nearest surface of a shape from an
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// outside point. The distance can be an underestimate.
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virtual G4double DistanceToOut(const G4ThreeVector& p,
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const G4ThreeVector& v,
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const G4bool calcNorm = false,
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G4bool* validNorm = 0,
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G4ThreeVector* n = 0) const override;
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// Return the distance along the normalised vector v to the shape,
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// from a point at an offset p inside or on the surface of the shape.
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// Intersections with surfaces, when the point is < Tolerance/2 from a
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// surface must be ignored.
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// If calcNorm==true:
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// validNorm set true if the solid lies entirely behind or on the
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// exiting surface.
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// n set to exiting outwards normal vector (undefined Magnitude).
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// validNorm set to false if the solid does not lie entirely behind
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// or on the exiting surface
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// If calcNorm==false:
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// validNorm and n are unused.
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//
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// Must be called as solid.DistanceToOut(p,v) or by specifying all
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// the parameters.
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virtual G4double DistanceToOut(const G4ThreeVector& p) const override;
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// Calculate the distance to the nearest surface of a shape from an
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// inside point. The distance can be an underestimate.
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virtual void ComputeDimensions(G4VPVParameterisation* p,
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const G4int n,
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const G4VPhysicalVolume* pRep) override;
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// Throw exception if ComputeDimensions called from an illegal
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// derived class.
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virtual G4double GetCubicVolume() override;
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// Returns an estimation of the solid volume in internal units.
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// This method may be overloaded by derived classes to compute the
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// exact geometrical quantity for solids where this is possible,
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// or anyway to cache the computed value.
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// Note: the computed value is NOT cached.
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virtual G4double GetSurfaceArea() override;
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// Return an estimation of the solid surface area in internal units.
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// This method may be overloaded by derived classes to compute the
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// exact geometrical quantity for solids where this is possible,
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// or anyway to cache the computed value.
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// Note: the computed value is NOT cached.
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virtual G4ThreeVector GetPointOnSurface() const override;
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// Returns a random point located on the surface of the solid.
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virtual G4GeometryType GetEntityType() const override;
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// Provide identification of the class of an object.
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// (required for persistency)
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virtual G4VSolid* Clone() const override;
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// Returns a pointer of a dynamically allocated copy of the solid.
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// Returns NULL pointer with warning in case the concrete solid does not
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// implement this method. The caller has responsibility for ownership.
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virtual std::ostream& StreamInfo(std::ostream& os) const override;
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// Dumps contents of the solid to a stream.
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virtual void DescribeYourselfTo(G4VGraphicsScene& scene) const override;
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// A "double dispatch" function which identifies the solid
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// to the graphics scene for visualization.
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virtual G4VisExtent GetExtent() const override;
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// Provide extent (bounding box) as possible hint to the graphics view.
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virtual G4Polyhedron* CreatePolyhedron() const override;
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// Create Polyhedron used for Visualisation
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virtual G4Polyhedron* GetPolyhedron() const override;
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// Smart access function - creates on request and stores for future
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// access. A null pointer means "not available".
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public: // without description
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G4UAdapter(__void__&);
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// Fake default constructor for usage restricted to direct object
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// persistency for clients requiring preallocation of memory for
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// persistifiable objects.
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G4UAdapter(const G4UAdapter& rhs);
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G4UAdapter& operator=(const G4UAdapter& rhs);
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// Copy constructor and assignment operator.
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public: // VecGeom overridden methods
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vecgeom::Precision
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DistanceToOut(U3Vector const &position, U3Vector const &direction,
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vecgeom::Precision stepMax = kInfinity) const override
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{
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return UnplacedVolume_t::DistanceToOut(position, direction, stepMax);
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}
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vecgeom::EnumInside
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Inside(U3Vector const &aPoint) const override
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{
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return UnplacedVolume_t::Inside(aPoint);
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}
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vecgeom::Precision
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DistanceToIn(U3Vector const &position, U3Vector const &direction,
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const vecgeom::Precision step_max = kInfinity) const override
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{
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return UnplacedVolume_t::DistanceToIn(position, direction, step_max);
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}
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G4bool Normal(U3Vector const &aPoint, U3Vector &aNormal) const override
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{
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return UnplacedVolume_t::Normal(aPoint, aNormal);
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}
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void Extent(U3Vector &aMin, U3Vector &aMax) const override
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{
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return UnplacedVolume_t::Extent(aMin, aMax);
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}
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U3Vector SamplePointOnSurface() const override
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{
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return UnplacedVolume_t::SamplePointOnSurface();
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}
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protected: // data
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mutable G4bool fRebuildPolyhedron;
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mutable G4Polyhedron* fPolyhedron;
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G4double kHalfTolerance; // Cached geometrical tolerance
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using UnplacedVolume_t::DistanceToOut;
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using UnplacedVolume_t::DistanceToIn;
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};
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// Inline implementations
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template <class UnplacedVolume_t>
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G4UAdapter<UnplacedVolume_t>::G4UAdapter(__void__& a)
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: G4VSolid(a), UnplacedVolume_t(*this),
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fRebuildPolyhedron(false), fPolyhedron(0),
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kHalfTolerance(0.5*kCarTolerance)
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{
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}
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template <class UnplacedVolume_t>
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G4UAdapter<UnplacedVolume_t>::~G4UAdapter()
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{
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delete fPolyhedron; fPolyhedron = 0;
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}
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template <class UnplacedVolume_t>
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G4bool G4UAdapter<UnplacedVolume_t>::
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operator==(const G4UAdapter& rhs) const
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{
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return (this == &rhs) ? true : false;
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}
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template <class UnplacedVolume_t>
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G4UAdapter<UnplacedVolume_t>::
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G4UAdapter(const G4UAdapter& rhs)
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: G4VSolid(rhs), UnplacedVolume_t(rhs),
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fRebuildPolyhedron(false), fPolyhedron(0)
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{
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kHalfTolerance = 0.5*kCarTolerance;
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}
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template <class UnplacedVolume_t>
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G4UAdapter<UnplacedVolume_t>& G4UAdapter<UnplacedVolume_t>::
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operator=(const G4UAdapter& rhs)
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{
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// Check assignment to self
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//
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if (this == &rhs)
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{
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return *this;
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}
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// Copy base class data
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//
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G4VSolid::operator=(rhs);
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UnplacedVolume_t::operator=(rhs);
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// Copy data
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//
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fRebuildPolyhedron = false;
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delete fPolyhedron; fPolyhedron = 0;
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kHalfTolerance = 0.5*kCarTolerance;
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return *this;
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}
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template <class UnplacedVolume_t>
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EInside G4UAdapter<UnplacedVolume_t>::
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Inside(const G4ThreeVector& p) const
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{
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U3Vector pt(p.x(), p.y(), p.z());
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vecgeom::EnumInside in_temp;
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EInside in = kOutside;
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in_temp = UnplacedVolume_t::Inside(pt);
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if (in_temp == vecgeom::EnumInside::eInside) in = kInside;
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else if (in_temp == vecgeom::EnumInside::eSurface) in = kSurface;
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return in;
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}
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template <class UnplacedVolume_t>
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G4ThreeVector G4UAdapter<UnplacedVolume_t>::
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SurfaceNormal(const G4ThreeVector& pt) const
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{
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U3Vector p(pt.x(), pt.y(), pt.z());
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U3Vector n;
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UnplacedVolume_t::Normal(p, n);
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return G4ThreeVector(n.x(), n.y(), n.z());
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}
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template <class UnplacedVolume_t>
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G4double G4UAdapter<UnplacedVolume_t>::
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DistanceToIn(const G4ThreeVector& pt, const G4ThreeVector& d) const
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{
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U3Vector p(pt.x(), pt.y(), pt.z());
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U3Vector v(d.x(), d.y(), d.z());
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G4double dist = UnplacedVolume_t::DistanceToIn(p, v, kInfinity);
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// apply Geant4 distance conventions
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//
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if (dist < kHalfTolerance) return 0.0;
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return (dist > kInfinity) ? kInfinity : dist;
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}
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template <class UnplacedVolume_t>
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G4double G4UAdapter<UnplacedVolume_t>::
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DistanceToIn(const G4ThreeVector& pt) const
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{
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U3Vector p(pt.x(), pt.y(), pt.z());
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G4double dist = UnplacedVolume_t::SafetyToIn(p);
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// Apply Geant4 convention: convert negative values to zero
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//
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if (dist < kHalfTolerance) return 0.0;
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return (dist > kInfinity) ? kInfinity : dist;
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}
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template <class UnplacedVolume_t>
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G4double G4UAdapter<UnplacedVolume_t>::
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DistanceToOut(const G4ThreeVector& pt, const G4ThreeVector& d,
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const G4bool calcNorm, G4bool* validNorm,
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G4ThreeVector* norm) const
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{
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U3Vector p(pt.x(), pt.y(), pt.z());
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U3Vector v(d.x(), d.y(), d.z());
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G4double dist = UnplacedVolume_t::DistanceToOut(p, v, kInfinity);
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if(calcNorm) // *norm=n, but only after calcNorm check and if convex volume
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{
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if (UnplacedVolume_t::IsConvex())
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{
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U3Vector n, hitpoint = p + dist * v;
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UnplacedVolume_t::Normal(hitpoint, n);
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*validNorm = true;
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norm->set(n.x(), n.y(), n.z());
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}
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else
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{
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*validNorm = false;
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}
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}
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// Apply Geant4 distance conventions
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//
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if (dist < kHalfTolerance) return 0.0;
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return (dist > kInfinity) ? kInfinity : dist;
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}
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template <class UnplacedVolume_t>
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G4double G4UAdapter<UnplacedVolume_t>::
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DistanceToOut(const G4ThreeVector& pt) const
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{
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U3Vector p(pt.x(), pt.y(), pt.z());
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G4double dist = UnplacedVolume_t::SafetyToOut(p);
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// Apply Geant4 convention: convert negative values to zero
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//
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if (dist < kHalfTolerance) return 0.0;
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return (dist > kInfinity) ? kInfinity : dist;
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}
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template <class UnplacedVolume_t>
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G4double G4UAdapter<UnplacedVolume_t>::GetCubicVolume()
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{
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return UnplacedVolume_t::Capacity();
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}
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template <class UnplacedVolume_t>
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G4double G4UAdapter<UnplacedVolume_t>::GetSurfaceArea()
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{
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return UnplacedVolume_t::SurfaceArea();
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}
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template <class UnplacedVolume_t>
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G4ThreeVector G4UAdapter<UnplacedVolume_t>::GetPointOnSurface() const
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{
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U3Vector p = UnplacedVolume_t::SamplePointOnSurface();;
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return G4ThreeVector(p.x(), p.y(), p.z());
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}
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// Inline visualization adapters
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namespace
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{
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G4Mutex pMutex = G4MUTEX_INITIALIZER;
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}
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template <class UnplacedVolume_t>
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void G4UAdapter<UnplacedVolume_t>::
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ComputeDimensions(G4VPVParameterisation*, const G4int,
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const G4VPhysicalVolume*)
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{
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std::ostringstream message;
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message << "Illegal call to G4UAdapter::ComputeDimensions()" << G4endl
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<< "Method not overloaded by derived class !";
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G4Exception("G4UAdapter::ComputeDimensions()", "GeomSolids0003",
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FatalException, message);
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}
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template <class UnplacedVolume_t>
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void G4UAdapter<UnplacedVolume_t>::
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DescribeYourselfTo(G4VGraphicsScene& scene) const
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{
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scene.AddSolid(*this);
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}
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template <class UnplacedVolume_t>
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G4GeometryType G4UAdapter<UnplacedVolume_t>::
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GetEntityType() const
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{
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G4String string = "VSolid"; // UnplacedVolume_t::GetEntityType();
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return "G4" + string;
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}
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template <class UnplacedVolume_t>
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std::ostream& G4UAdapter<UnplacedVolume_t>::
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StreamInfo(std::ostream& os) const
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{
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UnplacedVolume_t::Print(os);
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return os;
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}
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template <class UnplacedVolume_t>
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G4VSolid* G4UAdapter<UnplacedVolume_t>::Clone() const
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{
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std::ostringstream message;
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message << "Clone() method not implemented for type: "
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<< GetEntityType() << "!" << G4endl
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<< "Returning NULL pointer!";
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G4Exception("G4UAdapter::Clone()", "GeomSolids1001", JustWarning, message);
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return 0;
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}
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template <class UnplacedVolume_t>
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G4bool G4UAdapter<UnplacedVolume_t>::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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U3Vector vmin, vmax;
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UnplacedVolume_t::Extent(vmin,vmax);
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G4ThreeVector bmin(vmin.x(),vmin.y(),vmin.z());
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G4ThreeVector bmax(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 (bmin.x() >= bmax.x() || bmin.y() >= bmax.y() || bmin.z() >= bmax.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() << " - " << GetEntityType() << " !"
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<< "\nmin = " << bmin
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<< "\nmax = " << bmax;
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G4Exception("G4UAdapter::CalculateExtent()", "GeomMgt0001",
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JustWarning, message);
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StreamInfo(G4cout);
|
|
}
|
|
|
|
G4BoundingEnvelope bbox(bmin,bmax);
|
|
return bbox.CalculateExtent(pAxis,pVoxelLimit,pTransform,pMin,pMax);
|
|
}
|
|
|
|
template <class UnplacedVolume_t>
|
|
G4Polyhedron* G4UAdapter<UnplacedVolume_t>::CreatePolyhedron() const
|
|
{
|
|
// Must be implemented in concrete wrappers...
|
|
|
|
std::ostringstream message;
|
|
message << "Visualization not supported for USolid shape "
|
|
<< GetEntityType() << "... Sorry!" << G4endl;
|
|
G4Exception("G4UAdapter::CreatePolyhedron()", "GeomSolids0003",
|
|
FatalException, message);
|
|
return 0;
|
|
}
|
|
|
|
template <class UnplacedVolume_t>
|
|
G4Polyhedron* G4UAdapter<UnplacedVolume_t>::GetPolyhedron() const
|
|
{
|
|
if (!fPolyhedron ||
|
|
fRebuildPolyhedron ||
|
|
fPolyhedron->GetNumberOfRotationStepsAtTimeOfCreation() !=
|
|
fPolyhedron->GetNumberOfRotationSteps())
|
|
{
|
|
G4AutoLock l(&pMutex);
|
|
delete fPolyhedron;
|
|
fPolyhedron = CreatePolyhedron();
|
|
fRebuildPolyhedron = false;
|
|
l.unlock();
|
|
}
|
|
return fPolyhedron;
|
|
}
|
|
|
|
template <class UnplacedVolume_t>
|
|
G4VisExtent G4UAdapter<UnplacedVolume_t>::GetExtent() const
|
|
{
|
|
U3Vector vmin, vmax;
|
|
UnplacedVolume_t::Extent(vmin,vmax);
|
|
return G4VisExtent(vmin.x(),vmax.x(),
|
|
vmin.y(),vmax.y(),
|
|
vmin.z(),vmax.z());
|
|
}
|
|
|
|
#endif // G4GEOM_USE_USOLIDS
|
|
|
|
#endif // G4UADAPTER_HH
|