1 | // |
---|
2 | // ******************************************************************** |
---|
3 | // * License and Disclaimer * |
---|
4 | // * * |
---|
5 | // * The Geant4 software is copyright of the Copyright Holders of * |
---|
6 | // * the Geant4 Collaboration. It is provided under the terms and * |
---|
7 | // * conditions of the Geant4 Software License, included in the file * |
---|
8 | // * LICENSE and available at http://cern.ch/geant4/license . These * |
---|
9 | // * include a list of copyright holders. * |
---|
10 | // * * |
---|
11 | // * Neither the authors of this software system, nor their employing * |
---|
12 | // * institutes,nor the agencies providing financial support for this * |
---|
13 | // * work make any representation or warranty, express or implied, * |
---|
14 | // * regarding this software system or assume any liability for its * |
---|
15 | // * use. Please see the license in the file LICENSE and URL above * |
---|
16 | // * for the full disclaimer and the limitation of liability. * |
---|
17 | // * * |
---|
18 | // * This code implementation is the result of the scientific and * |
---|
19 | // * technical work of the GEANT4 collaboration. * |
---|
20 | // * By using, copying, modifying or distributing the software (or * |
---|
21 | // * any work based on the software) you agree to acknowledge its * |
---|
22 | // * use in resulting scientific publications, and indicate your * |
---|
23 | // * acceptance of all terms of the Geant4 Software license. * |
---|
24 | // ******************************************************************** |
---|
25 | // |
---|
26 | // |
---|
27 | // $Id: G4Trap.hh,v 1.17 2006/10/19 15:33:37 gcosmo Exp $ |
---|
28 | // GEANT4 tag $Name: geant4-09-02-ref-02 $ |
---|
29 | // |
---|
30 | // |
---|
31 | // -------------------------------------------------------------------- |
---|
32 | // GEANT 4 class header file |
---|
33 | // |
---|
34 | // G4Trap |
---|
35 | // |
---|
36 | // Class description: |
---|
37 | // |
---|
38 | // A G4Trap is a general trapezoid: The faces perpendicular to the |
---|
39 | // z planes are trapezia, and their centres are not necessarily on |
---|
40 | // a line parallel to the z axis. |
---|
41 | // |
---|
42 | // Note that of the 11 parameters described below, only 9 are really |
---|
43 | // independent - a check for planarity is made in the calculation of the |
---|
44 | // equation for each plane. If the planes are not parallel, a call to |
---|
45 | // G4Exception is made. |
---|
46 | // |
---|
47 | // pDz Half-length along the z-axis |
---|
48 | // pTheta Polar angle of the line joining the centres of the faces |
---|
49 | // at -/+pDz |
---|
50 | // pPhi Azimuthal angle of the line joing the centre of the face at |
---|
51 | // -pDz to the centre of the face at +pDz |
---|
52 | // pDy1 Half-length along y of the face at -pDz |
---|
53 | // pDx1 Half-length along x of the side at y=-pDy1 of the face at -pDz |
---|
54 | // pDx2 Half-length along x of the side at y=+pDy1 of the face at -pDz |
---|
55 | // pAlp1 Angle with respect to the y axis from the centre of the side |
---|
56 | // at y=-pDy1 to the centre at y=+pDy1 of the face at -pDz |
---|
57 | // |
---|
58 | // pDy2 Half-length along y of the face at +pDz |
---|
59 | // pDx3 Half-length along x of the side at y=-pDy2 of the face at +pDz |
---|
60 | // pDx4 Half-length along x of the side at y=+pDy2 of the face at +pDz |
---|
61 | // pAlp2 Angle with respect to the y axis from the centre of the side |
---|
62 | // at y=-pDy2 to the centre at y=+pDy2 of the face at +pDz |
---|
63 | // |
---|
64 | // |
---|
65 | // Member Data: |
---|
66 | // |
---|
67 | // fDz Half-length along the z axis |
---|
68 | // fTthetaCphi = std::tan(pTheta)*std::cos(pPhi) |
---|
69 | // fTthetaSphi = std::tan(pTheta)*std::sin(pPhi) |
---|
70 | // These combinations are suitable for creation of the trapezoid corners |
---|
71 | // |
---|
72 | // fDy1 Half-length along y of the face at -fDz |
---|
73 | // fDx1 Half-length along x of the side at y=-fDy1 of the face at -fDz |
---|
74 | // fDx2 Half-length along x of the side at y=+fDy1 of the face at -fDz |
---|
75 | // fTalpha1 Tan of Angle with respect to the y axis from the centre of |
---|
76 | // the side at y=-fDy1 to the centre at y=+fDy1 of the face |
---|
77 | // at -fDz |
---|
78 | // |
---|
79 | // fDy2 Half-length along y of the face at +fDz |
---|
80 | // fDx3 Half-length along x of the side at y=-fDy2 of the face at +fDz |
---|
81 | // fDx4 Half-length along x of the side at y=+fDy2 of the face at +fDz |
---|
82 | // fTalpha2 Tan of Angle with respect to the y axis from the centre of |
---|
83 | // the side at y=-fDy2 to the centre at y=+fDy2 of the face |
---|
84 | // at +fDz |
---|
85 | // |
---|
86 | // TrapSidePlane fPlanes[4] Plane equations of the faces not at +/-fDz |
---|
87 | // NOTE: order is important !!! |
---|
88 | |
---|
89 | // History: |
---|
90 | // |
---|
91 | // 23.3.94 P.Kent: Old C++ code converted to tolerant geometry |
---|
92 | // 9.9.96 V.Grichine: Final modifications before to commit |
---|
93 | // 1.11.96 V.Grichine: Costructors for Right Angular Wedge from STEP, G4Trd/Para |
---|
94 | // 8.12.97 J.Allison: Added "nominal" contructor and method SetAllParameters. |
---|
95 | // -------------------------------------------------------------------- |
---|
96 | |
---|
97 | #ifndef G4Trap_HH |
---|
98 | #define G4Trap_HH |
---|
99 | |
---|
100 | #include "G4CSGSolid.hh" |
---|
101 | |
---|
102 | struct TrapSidePlane |
---|
103 | { |
---|
104 | G4double a,b,c,d; // Normal unit vector (a,b,c) and offset (d) |
---|
105 | // => Ax+By+Cz+D=0 |
---|
106 | }; |
---|
107 | |
---|
108 | class G4Trap : public G4CSGSolid |
---|
109 | { |
---|
110 | |
---|
111 | public: // with description |
---|
112 | |
---|
113 | G4Trap( const G4String& pName, |
---|
114 | G4double pDz, |
---|
115 | G4double pTheta, G4double pPhi, |
---|
116 | G4double pDy1, G4double pDx1, G4double pDx2, |
---|
117 | G4double pAlp1, |
---|
118 | G4double pDy2, G4double pDx3, G4double pDx4, |
---|
119 | G4double pAlp2 ); |
---|
120 | // |
---|
121 | // The most general constructor for G4Trap which prepares plane |
---|
122 | // equations and corner coordinates from parameters |
---|
123 | |
---|
124 | G4Trap( const G4String& pName, |
---|
125 | const G4ThreeVector pt[8] ) ; |
---|
126 | // |
---|
127 | // Prepares plane equations and parameters from corner coordinates |
---|
128 | |
---|
129 | G4Trap( const G4String& pName, |
---|
130 | G4double pZ, |
---|
131 | G4double pY, |
---|
132 | G4double pX, G4double pLTX ); |
---|
133 | // |
---|
134 | // Constructor for Right Angular Wedge from STEP (assumes pLTX<=pX) |
---|
135 | |
---|
136 | G4Trap( const G4String& pName, |
---|
137 | G4double pDx1, G4double pDx2, |
---|
138 | G4double pDy1, G4double pDy2, |
---|
139 | G4double pDz ); |
---|
140 | // |
---|
141 | // Constructor for G4Trd |
---|
142 | |
---|
143 | G4Trap(const G4String& pName, |
---|
144 | G4double pDx, G4double pDy, G4double pDz, |
---|
145 | G4double pAlpha, G4double pTheta, G4double pPhi ); |
---|
146 | // |
---|
147 | // Constructor for G4Para |
---|
148 | |
---|
149 | G4Trap( const G4String& pName ); |
---|
150 | // |
---|
151 | // Constructor for "nominal" G4Trap whose parameters are to be set |
---|
152 | // by a G4VPVParamaterisation later |
---|
153 | |
---|
154 | virtual ~G4Trap() ; |
---|
155 | // |
---|
156 | // Destructor |
---|
157 | |
---|
158 | // Accessors |
---|
159 | |
---|
160 | inline G4double GetZHalfLength() const; |
---|
161 | inline G4double GetYHalfLength1() const; |
---|
162 | inline G4double GetXHalfLength1() const; |
---|
163 | inline G4double GetXHalfLength2() const; |
---|
164 | inline G4double GetTanAlpha1() const; |
---|
165 | inline G4double GetYHalfLength2() const; |
---|
166 | inline G4double GetXHalfLength3() const; |
---|
167 | inline G4double GetXHalfLength4() const; |
---|
168 | inline G4double GetTanAlpha2() const; |
---|
169 | // |
---|
170 | // Returns coordinates of unit vector along straight |
---|
171 | // line joining centers of -/+fDz planes |
---|
172 | |
---|
173 | inline TrapSidePlane GetSidePlane( G4int n ) const; |
---|
174 | inline G4ThreeVector GetSymAxis() const; |
---|
175 | |
---|
176 | // Modifiers |
---|
177 | |
---|
178 | void SetAllParameters ( G4double pDz, |
---|
179 | G4double pTheta, |
---|
180 | G4double pPhi, |
---|
181 | G4double pDy1, |
---|
182 | G4double pDx1, |
---|
183 | G4double pDx2, |
---|
184 | G4double pAlp1, |
---|
185 | G4double pDy2, |
---|
186 | G4double pDx3, |
---|
187 | G4double pDx4, |
---|
188 | G4double pAlp2 ); |
---|
189 | |
---|
190 | // Methods for solid |
---|
191 | |
---|
192 | inline G4double GetCubicVolume(); |
---|
193 | inline G4double GetSurfaceArea(); |
---|
194 | |
---|
195 | void ComputeDimensions( G4VPVParameterisation* p, |
---|
196 | const G4int n, |
---|
197 | const G4VPhysicalVolume* pRep ); |
---|
198 | |
---|
199 | G4bool CalculateExtent( const EAxis pAxis, |
---|
200 | const G4VoxelLimits& pVoxelLimit, |
---|
201 | const G4AffineTransform& pTransform, |
---|
202 | G4double& pMin, G4double& pMax ) const; |
---|
203 | |
---|
204 | EInside Inside( const G4ThreeVector& p ) const; |
---|
205 | |
---|
206 | G4ThreeVector SurfaceNormal( const G4ThreeVector& p ) const; |
---|
207 | |
---|
208 | G4double DistanceToIn(const G4ThreeVector& p, const G4ThreeVector& v) const; |
---|
209 | |
---|
210 | G4double DistanceToIn( const G4ThreeVector& p ) const; |
---|
211 | |
---|
212 | G4double DistanceToOut(const G4ThreeVector& p, const G4ThreeVector& v, |
---|
213 | const G4bool calcNorm=false, |
---|
214 | G4bool *validNorm=0, G4ThreeVector *n=0) const; |
---|
215 | |
---|
216 | G4double DistanceToOut( const G4ThreeVector& p ) const; |
---|
217 | |
---|
218 | G4GeometryType GetEntityType() const; |
---|
219 | |
---|
220 | G4ThreeVector GetPointOnSurface() const; |
---|
221 | |
---|
222 | std::ostream& StreamInfo( std::ostream& os ) const; |
---|
223 | |
---|
224 | // Visualisation functions |
---|
225 | |
---|
226 | void DescribeYourselfTo ( G4VGraphicsScene& scene ) const; |
---|
227 | G4Polyhedron* CreatePolyhedron () const; |
---|
228 | G4NURBS* CreateNURBS () const; |
---|
229 | |
---|
230 | public: // without description |
---|
231 | |
---|
232 | G4Trap(__void__&); |
---|
233 | // Fake default constructor for usage restricted to direct object |
---|
234 | // persistency for clients requiring preallocation of memory for |
---|
235 | // persistifiable objects. |
---|
236 | |
---|
237 | protected: // with description |
---|
238 | |
---|
239 | G4bool MakePlanes(); |
---|
240 | G4bool MakePlane( const G4ThreeVector& p1, |
---|
241 | const G4ThreeVector& p2, |
---|
242 | const G4ThreeVector& p3, |
---|
243 | const G4ThreeVector& p4, |
---|
244 | TrapSidePlane& plane ) ; |
---|
245 | |
---|
246 | G4ThreeVectorList* |
---|
247 | CreateRotatedVertices( const G4AffineTransform& pTransform ) const; |
---|
248 | // |
---|
249 | // Creates the List of transformed vertices in the format required |
---|
250 | // for G4CSGSolid:: ClipCrossSection and ClipBetweenSections |
---|
251 | |
---|
252 | private: |
---|
253 | |
---|
254 | G4ThreeVector ApproxSurfaceNormal( const G4ThreeVector& p ) const; |
---|
255 | // Algorithm for SurfaceNormal() following the original |
---|
256 | // specification for points not on the surface |
---|
257 | |
---|
258 | inline G4double GetFaceArea(const G4ThreeVector& p1, |
---|
259 | const G4ThreeVector& p2, |
---|
260 | const G4ThreeVector& p3, |
---|
261 | const G4ThreeVector& p4); |
---|
262 | // |
---|
263 | // Provided four corners of plane in clockwise fashion, |
---|
264 | // it returns the area of finite face |
---|
265 | |
---|
266 | G4ThreeVector GetPointOnPlane(G4ThreeVector p0, G4ThreeVector p1, |
---|
267 | G4ThreeVector p2, G4ThreeVector p3, |
---|
268 | G4double& area) const; |
---|
269 | // |
---|
270 | // Returns a random point on the surface of one of the faces |
---|
271 | |
---|
272 | private: |
---|
273 | |
---|
274 | G4double fDz,fTthetaCphi,fTthetaSphi; |
---|
275 | G4double fDy1,fDx1,fDx2,fTalpha1; |
---|
276 | G4double fDy2,fDx3,fDx4,fTalpha2; |
---|
277 | TrapSidePlane fPlanes[4]; |
---|
278 | |
---|
279 | }; |
---|
280 | |
---|
281 | #include "G4Trap.icc" |
---|
282 | |
---|
283 | #endif |
---|