[831] | 1 | // |
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| 2 | // ******************************************************************** |
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| 3 | // * License and Disclaimer * |
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| 4 | // * * |
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| 5 | // * The Geant4 software is copyright of the Copyright Holders of * |
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| 6 | // * the Geant4 Collaboration. It is provided under the terms and * |
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| 7 | // * conditions of the Geant4 Software License, included in the file * |
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| 8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
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| 9 | // * include a list of copyright holders. * |
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| 10 | // * * |
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| 11 | // * Neither the authors of this software system, nor their employing * |
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| 12 | // * institutes,nor the agencies providing financial support for this * |
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| 13 | // * work make any representation or warranty, express or implied, * |
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| 14 | // * regarding this software system or assume any liability for its * |
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| 15 | // * use. Please see the license in the file LICENSE and URL above * |
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| 16 | // * for the full disclaimer and the limitation of liability. * |
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| 17 | // * * |
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| 18 | // * This code implementation is the result of the scientific and * |
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| 19 | // * technical work of the GEANT4 collaboration. * |
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| 20 | // * By using, copying, modifying or distributing the software (or * |
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| 21 | // * any work based on the software) you agree to acknowledge its * |
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| 22 | // * use in resulting scientific publications, and indicate your * |
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| 23 | // * acceptance of all terms of the Geant4 Software license. * |
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| 24 | // ******************************************************************** |
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| 25 | // |
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| 26 | // |
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| 27 | // $Id: G4ErrorCylSurfaceTarget.cc,v 1.4 2007/06/20 12:50:48 arce Exp $ |
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[1058] | 28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
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[831] | 29 | // |
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| 30 | // |
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| 31 | // -------------------------------------------------------------------- |
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| 32 | // GEANT 4 class implementation file |
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| 33 | // -------------------------------------------------------------------- |
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| 34 | |
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| 35 | #include "G4ErrorCylSurfaceTarget.hh" |
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| 36 | #include "G4GeometryTolerance.hh" |
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| 37 | |
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| 38 | #ifdef G4VERBOSE |
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| 39 | #include "G4ErrorPropagatorData.hh" //for verbosity checking |
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| 40 | #endif |
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| 41 | |
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| 42 | #include "geomdefs.hh" |
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| 43 | #include "G4Plane3D.hh" |
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| 44 | |
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| 45 | //--------------------------------------------------------------------- |
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| 46 | |
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| 47 | G4ErrorCylSurfaceTarget:: |
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| 48 | G4ErrorCylSurfaceTarget( const G4double& radius, |
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| 49 | const G4ThreeVector& trans, |
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| 50 | const G4RotationMatrix& rotm ) |
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| 51 | : fradius(radius) |
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| 52 | { |
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| 53 | theType = G4ErrorTarget_CylindricalSurface; |
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| 54 | |
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| 55 | ftransform = G4AffineTransform( rotm.inverse(), -trans ); |
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| 56 | #ifdef G4VERBOSE |
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| 57 | if(G4ErrorPropagatorData::verbose() >= 2 ) { |
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| 58 | Dump( " $$$ creating G4ErrorCylSurfaceTarget "); |
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| 59 | } |
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| 60 | #endif |
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| 61 | } |
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| 62 | |
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| 63 | //--------------------------------------------------------------------- |
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| 64 | |
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| 65 | G4ErrorCylSurfaceTarget:: |
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| 66 | G4ErrorCylSurfaceTarget( const G4double& radius, |
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| 67 | const G4AffineTransform& trans ) |
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| 68 | : fradius(radius), ftransform(trans.Inverse()) |
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| 69 | { |
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| 70 | theType = G4ErrorTarget_CylindricalSurface; |
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| 71 | |
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| 72 | #ifdef G4VERBOSE |
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| 73 | if(G4ErrorPropagatorData::verbose() >= 2 ) |
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| 74 | { |
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| 75 | Dump( " $$$ creating G4ErrorCylSurfaceTarget "); |
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| 76 | } |
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| 77 | #endif |
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| 78 | } |
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| 79 | |
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| 80 | //--------------------------------------------------------------------- |
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| 81 | |
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| 82 | G4ErrorCylSurfaceTarget::~G4ErrorCylSurfaceTarget() |
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| 83 | { |
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| 84 | } |
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| 85 | |
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| 86 | //--------------------------------------------------------------------- |
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| 87 | |
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| 88 | G4double G4ErrorCylSurfaceTarget:: |
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| 89 | GetDistanceFromPoint( const G4ThreeVector& point, |
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| 90 | const G4ThreeVector& dir ) const |
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| 91 | { |
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| 92 | if( dir.mag() == 0. ) |
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| 93 | { |
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| 94 | G4Exception("G4ErrorCylSurfaceTarget::GetDistanceFromPoint()", |
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| 95 | "InvalidSetup", FatalException, "Direction is zero !"); |
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| 96 | } |
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| 97 | |
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| 98 | //----- Get intersection point |
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| 99 | G4ThreeVector localPoint = ftransform.TransformPoint( point ); |
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| 100 | G4ThreeVector localDir = ftransform.TransformAxis( dir ); |
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| 101 | G4ThreeVector inters = IntersectLocal(localPoint, localDir); |
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| 102 | |
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| 103 | G4double dist = (localPoint-inters).mag(); |
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| 104 | |
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| 105 | #ifdef G4VERBOSE |
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| 106 | if(G4ErrorPropagatorData::verbose() >= 3 ) |
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| 107 | { |
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| 108 | G4cout << " G4ErrorCylSurfaceTarget::GetDistanceFromPoint():" << G4endl |
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| 109 | << " Global point " << point << " dir " << dir << G4endl |
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| 110 | << " Intersection " << inters << G4endl |
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| 111 | << " Distance " << dist << G4endl; |
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| 112 | Dump( " CylSurface: " ); |
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| 113 | } |
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| 114 | #endif |
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| 115 | |
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| 116 | return dist; |
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| 117 | } |
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| 118 | |
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| 119 | |
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| 120 | //--------------------------------------------------------------------- |
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| 121 | |
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| 122 | G4double G4ErrorCylSurfaceTarget:: |
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| 123 | GetDistanceFromPoint( const G4ThreeVector& point ) const |
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| 124 | { |
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| 125 | G4ThreeVector localPoint = ftransform.TransformPoint( point ); |
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| 126 | |
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| 127 | #ifdef G4VERBOSE |
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| 128 | if(G4ErrorPropagatorData::verbose() >= 3 ) |
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| 129 | { |
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| 130 | G4cout << " G4ErrorCylSurfaceTarget::GetDistanceFromPoint:" << G4endl |
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| 131 | << " Global point " << point << G4endl |
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| 132 | << " Distance " << fradius - localPoint.perp() << G4endl; |
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| 133 | Dump( " CylSurface: " ); |
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| 134 | } |
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| 135 | #endif |
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| 136 | |
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| 137 | return fradius - localPoint.perp(); |
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| 138 | } |
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| 139 | |
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| 140 | //--------------------------------------------------------------------- |
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| 141 | |
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| 142 | G4ThreeVector G4ErrorCylSurfaceTarget:: |
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| 143 | IntersectLocal( const G4ThreeVector& localPoint, |
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| 144 | const G4ThreeVector& localDir ) const |
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| 145 | { |
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| 146 | G4double eqa = localDir.x()*localDir.x()+localDir.y()*localDir.y(); |
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| 147 | G4double eqb = 2*(localPoint.x()*localDir.x()+localPoint.y()*localDir.y()); |
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| 148 | G4double eqc = -fradius*fradius+localPoint.x()*localPoint.x() |
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| 149 | +localPoint.y()*localPoint.y(); |
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| 150 | G4int inside = (localPoint.perp() > fradius) ? -1 : 1; |
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| 151 | G4double lambda; |
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| 152 | |
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| 153 | if( eqa*inside > 0. ) |
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| 154 | { |
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| 155 | lambda = (-eqb + std::sqrt(eqb*eqb-4*eqa*eqc) ) / (2.*eqa); |
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| 156 | } |
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| 157 | else if( eqa*inside < 0. ) |
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| 158 | { |
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| 159 | lambda = (-eqb - std::sqrt(eqb*eqb-4*eqa*eqc) ) / (2.*eqa); |
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| 160 | } |
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| 161 | else |
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| 162 | { |
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| 163 | if( eqb != 0. ) |
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| 164 | { |
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| 165 | lambda = -eqc/eqb; |
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| 166 | } |
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| 167 | else |
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| 168 | { |
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| 169 | G4cerr << "WARNING - G4ErrorCylSurfaceTarget::IntersectLocal()" << G4endl |
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| 170 | << " Point: " << localPoint << ", direction: " |
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| 171 | << localDir << G4endl; |
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| 172 | Dump( " CylSurface: " ); |
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| 173 | G4Exception("G4ErrorCylSurfaceTarget::IntersectLocal()", |
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| 174 | "IllegalCondition", |
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| 175 | JustWarning, "Intersection not possible !"); |
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| 176 | lambda = kInfinity; |
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| 177 | } |
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| 178 | } |
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| 179 | |
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| 180 | G4ThreeVector inters = localPoint + lambda*localDir/localDir.mag(); |
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| 181 | |
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| 182 | #ifdef G4VERBOSE |
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| 183 | if(G4ErrorPropagatorData::verbose() >= 4 ) { |
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| 184 | G4cout << " G4ErrorCylSurfaceTarget::IntersectLocal " << inters << " " << inters.perp() << " localPoint " << localPoint << " localDir " << localDir << G4endl; |
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| 185 | } |
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| 186 | #endif |
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| 187 | |
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| 188 | return inters; |
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| 189 | } |
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| 190 | |
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| 191 | //--------------------------------------------------------------------- |
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| 192 | |
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| 193 | G4Plane3D G4ErrorCylSurfaceTarget:: |
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| 194 | GetTangentPlane( const G4ThreeVector& point ) const |
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| 195 | { |
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| 196 | G4ThreeVector localPoint = ftransform.TransformPoint( point ); |
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| 197 | |
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| 198 | // check that point is at cylinder surface |
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| 199 | // |
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| 200 | if( std::fabs( localPoint.perp() - fradius ) |
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| 201 | > 1000.*G4GeometryTolerance::GetInstance()->GetSurfaceTolerance() ) |
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| 202 | { |
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| 203 | G4cerr << "WARNING - G4ErrorCylSurfaceTarget::GetTangentPlane()" << G4endl |
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| 204 | << " Point: " << point << ", local: " << localPoint |
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| 205 | << G4endl |
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| 206 | << " is not at surface, but far away by: " |
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| 207 | << localPoint.perp() - fradius << " !" << G4endl; |
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| 208 | G4Exception("G4ErrorCylSurfaceTarget::GetTangentPlane()", |
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| 209 | "IllegalCondition", JustWarning, |
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| 210 | "Local point not at surface !"); |
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| 211 | } |
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| 212 | |
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| 213 | G4Normal3D normal = localPoint - ftransform.NetTranslation(); |
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| 214 | |
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| 215 | return G4Plane3D( normal, point ); |
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| 216 | } |
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| 217 | |
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| 218 | |
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| 219 | //--------------------------------------------------------------------- |
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| 220 | |
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| 221 | void G4ErrorCylSurfaceTarget::Dump( const G4String& msg ) const |
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| 222 | { |
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| 223 | G4cout << msg << " radius " << fradius |
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| 224 | << " centre " << ftransform.NetTranslation() |
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| 225 | << " rotation " << ftransform.NetRotation() << G4endl; |
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| 226 | } |
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