source: trunk/source/geometry/solids/specific/include/G4VTwistSurface.icc@ 1036

Last change on this file since 1036 was 850, checked in by garnier, 17 years ago

geant4.8.2 beta
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[831]1//
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26//
27// $Id: G4VTwistSurface.icc,v 1.3 2006/06/29 18:48:20 gunter Exp $
[850]28// GEANT4 tag $Name: HEAD $
[831]29//
30//
31// --------------------------------------------------------------------
32// G4VTwistSurface class inline methods
33//
34// Author:
35// 01-Aug-2002 - Kotoyo Hoshina (hoshina@hepburn.s.chiba-u.ac.jp)
36//
37// History:
38// 13-Nov-2003 - O.Link (Oliver.Link@cern.ch), Integration in Geant4
39// from original version in Jupiter-2.5.02 application.
40// --------------------------------------------------------------------
41
42//=====================================================================
43//* DistanceToPlaneWithV ----------------------------------------------
44
45inline
46G4double G4VTwistSurface::DistanceToPlaneWithV(const G4ThreeVector &p,
47 const G4ThreeVector &v,
48 const G4ThreeVector &x0,
49 const G4ThreeVector &n0,
50 G4ThreeVector &xx)
51{
52 G4double t = (n0 * (x0 - p)) / (n0 * v);
53 xx = p + t * v;
54 return t;
55}
56
57//=====================================================================
58//* DistanceToPlane ---------------------------------------------------
59
60inline
61G4double G4VTwistSurface::DistanceToPlane(const G4ThreeVector &p,
62 const G4ThreeVector &x0,
63 const G4ThreeVector &n0,
64 G4ThreeVector &xx)
65{
66 // DistanceToPlane :
67 // Calculate distance to plane in local coordinate,
68 // then return distance and global intersection points.
69 //
70 // p - location of flying particle
71 // x0 - reference point of surface
72 // xx - a foot of perpendicular line from p to the plane
73 // t - distance from xx to p
74 // n - a unit normal of this plane from plane to p.
75 //
76 // equation of plane:
77 // n*(x - x0) = 0;
78 //
79 // vector to xx:
80 // xx = p - t*n
81 //
82 // where
83 // t = n * (p - x0) / std::abs(n)
84 //
85 G4double t;
86 G4ThreeVector n = n0.unit();
87 t = n * (p - x0);
88 xx = p - t * n;
89 return t;
90}
91
92//=====================================================================
93//* DistanceToPlane ---------------------------------------------------
94
95inline
96G4double G4VTwistSurface::DistanceToPlane(const G4ThreeVector &p,
97 const G4ThreeVector &x0,
98 const G4ThreeVector &t1,
99 const G4ThreeVector &t2,
100 G4ThreeVector &xx,
101 G4ThreeVector &n)
102{
103 // DistanceToPlane :
104 // Calculate distance to plane in local coordinate,
105 // then return distance and global intersection points.
106 // t1 - 1st. vector lying on the plane
107 // t2 - 2nd. vector lying on the plane
108
109 n = (t1.cross(t2)).unit();
110 return DistanceToPlane(p, x0, n, xx);
111}
112
113//=====================================================================
114//* DistanceToLine ----------------------------------------------------
115
116inline
117G4double G4VTwistSurface::DistanceToLine(const G4ThreeVector &p,
118 const G4ThreeVector &x0,
119 const G4ThreeVector &d,
120 G4ThreeVector &xx)
121{
122 // DistanceToLine :
123 // Calculate distance to line,
124 // then return distance and global intersection points.
125 //
126 // p - location of flying particle
127 // x0 - reference point of line
128 // d - direction vector of line
129 // xx - a foot of perpendicular line from p to the plane
130 // t - distance from xx to p
131 //
132 // Equation
133 //
134 // distance^2 = |(xx - p)|^2
135 // with
136 // xx = x0 + t*d
137 //
138 // (d/dt)distance^2 = (d/dt)|((x0 + t*d) - p)|^2
139 // = 2*t*|d|^2 + 2*d*(x0 - p)
140 // = 0 // smallest distance
141 // then
142 // t = - d*(x0 - p) / |d|^2
143 //
144
145 G4double t;
146 G4ThreeVector dir = d.unit();
147 t = - dir * (x0 - p); // |dir|^2 = 1.
148 xx = x0 + t * dir;
149
150 G4ThreeVector dist = xx - p;
151 return dist.mag();
152}
153
154//=====================================================================
155//* IsAxis0 -----------------------------------------------------------
156
157inline
158G4bool G4VTwistSurface::IsAxis0(G4int areacode) const
159{
160 if (areacode & sAxis0) return true;
161 return false;
162}
163
164//=====================================================================
165//* IsAxis1 -----------------------------------------------------------
166
167inline
168G4bool G4VTwistSurface::IsAxis1(G4int areacode) const
169{
170 if (areacode & sAxis1) return true;
171 return false;
172}
173
174//=====================================================================
175//* IsOutside ---------------------------------------------------------
176
177inline
178G4bool G4VTwistSurface::IsOutside(G4int areacode) const
179{
180 if (areacode & sInside) return false;
181 return true;
182}
183
184//=====================================================================
185//* IsInside ----------------------------------------------------------
186
187inline
188G4bool G4VTwistSurface::IsInside(G4int areacode, G4bool testbitmode) const
189{
190 if (areacode & sInside) {
191 if (testbitmode) {
192 return true;
193 } else {
194 if (!((areacode & sBoundary) || (areacode & sCorner))) return true;
195 }
196 }
197 return false;
198}
199
200//=====================================================================
201//* IsBoundary --------------------------------------------------------
202
203inline
204G4bool G4VTwistSurface::IsBoundary(G4int areacode, G4bool testbitmode) const
205{
206 if ((areacode & sBoundary) == sBoundary) {
207 if (testbitmode) {
208 return true;
209 } else {
210 if ((areacode & sInside) == sInside) return true;
211 }
212 }
213 return false;
214}
215
216//=====================================================================
217//* IsCorner ----------------------------------------------------------
218
219inline
220G4bool G4VTwistSurface::IsCorner(G4int areacode, G4bool testbitmode) const
221{
222 if ((areacode & sCorner) == sCorner) {
223 if (testbitmode) {
224 return true;
225 } else {
226 if ((areacode & sInside) == sInside) return true;
227 }
228 }
229 return false;
230}
231
232//=====================================================================
233//* GetAxisType -------------------------------------------------------
234
235inline
236G4int G4VTwistSurface::GetAxisType(G4int areacode, G4int whichaxis) const
237{
238 G4int axiscode = areacode & sAxisMask & whichaxis;
239
240 if (axiscode == (sAxisX & sAxis0) ||
241 axiscode == (sAxisX & sAxis1)) {
242 return sAxisX;
243 } else if (axiscode == (sAxisY & sAxis0) ||
244 axiscode == (sAxisY & sAxis1)) {
245 return sAxisY;
246 } else if (axiscode == (sAxisZ & sAxis0) ||
247 axiscode == (sAxisZ & sAxis1)) {
248 return sAxisZ;
249 } else if (axiscode == (sAxisRho & sAxis0) ||
250 axiscode == (sAxisRho & sAxis1)) {
251 return sAxisRho;
252 } else if (axiscode == (sAxisPhi & sAxis0) ||
253 axiscode == (sAxisPhi & sAxis1)) {
254 return sAxisPhi;
255 } else {
256 G4cerr << "ERROR - G4VTwistSurface::GetAxisType()" << G4endl
257 << " areacode = " << areacode << G4endl;
258 G4Exception("G4VTwistSurface::GetAxisType()","NotSupported",
259 FatalException, "Configuration not supported.");
260 }
261 return 1;
262}
263
264//=====================================================================
265//* ComputeGlobalPoint ------------------------------------------------
266
267inline
268G4ThreeVector G4VTwistSurface::ComputeGlobalPoint(const G4ThreeVector &lp) const
269{
270 return fRot * G4ThreeVector(lp) + fTrans;
271}
272
273//=====================================================================
274//* ComputeGlobalPoint ------------------------------------------------
275
276inline
277G4ThreeVector G4VTwistSurface::ComputeLocalPoint(const G4ThreeVector &gp) const
278{
279 return fRot.inverse() * ( G4ThreeVector(gp) - fTrans ) ;
280}
281
282//=====================================================================
283//* ComputeGlobalDirection --------------------------------------------
284
285inline
286G4ThreeVector G4VTwistSurface::ComputeGlobalDirection(const G4ThreeVector &lp) const
287{
288 return fRot * G4ThreeVector(lp);
289}
290
291//=====================================================================
292//* ComputeLocalDirection ---------------------------------------------
293
294inline
295G4ThreeVector G4VTwistSurface::ComputeLocalDirection(const G4ThreeVector &gp) const
296{
297 return fRot.inverse() * G4ThreeVector(gp);
298}
299
300//=====================================================================
301//* SetNeighbours -----------------------------------------------------
302
303inline
304void G4VTwistSurface::SetNeighbours(G4VTwistSurface* axis0min, G4VTwistSurface* axis1min,
305 G4VTwistSurface* axis0max, G4VTwistSurface* axis1max)
306{
307 fNeighbours[0] = axis0min;
308 fNeighbours[1] = axis1min;
309 fNeighbours[2] = axis0max;
310 fNeighbours[3] = axis1max;
311}
312
313//=====================================================================
314//* GetNeighbours -----------------------------------------------------
315
316inline
317G4int G4VTwistSurface::GetNeighbours(G4int areacode, G4VTwistSurface** surfaces)
318{
319
320 int sAxis0Min = sAxis0 & sAxisMin ;
321 int sAxis1Min = sAxis1 & sAxisMin ;
322 int sAxis0Max = sAxis0 & sAxisMax ;
323 int sAxis1Max = sAxis1 & sAxisMax ;
324
325 G4int i = 0;
326
327 if ( (areacode & sAxis0Min ) == sAxis0Min ) {
328 surfaces[i] = fNeighbours[0] ;
329 i++ ;
330 }
331
332 if ( ( areacode & sAxis1Min ) == sAxis1Min ) {
333 surfaces[i] = fNeighbours[1] ;
334 i++ ;
335 if ( i == 2 ) return i ;
336 }
337
338 if ( ( areacode & sAxis0Max ) == sAxis0Max ) {
339 surfaces[i] = fNeighbours[2] ;
340 i++ ;
341 if ( i == 2 ) return i ;
342 }
343
344 if ( ( areacode & sAxis1Max ) == sAxis1Max ) {
345 surfaces[i] = fNeighbours[3] ;
346 i++ ;
347 if ( i == 2 ) return i ;
348 }
349
350 return i ;
351}
352
353//=====================================================================
354//* GetCorner ---------------------------------------------------------
355
356inline
357G4ThreeVector G4VTwistSurface::GetCorner(G4int areacode) const
358{
359 if (!(areacode & sCorner)){
360 G4cerr << "ERROR - G4VTwistSurface::GetCorner()" << G4endl
361 << " areacode = " << areacode << G4endl;
362 G4Exception("G4VTwistSurface::GetCorner()","InvalidSetup",
363 FatalException, "Area code must represent corner.");
364 }
365
366 if ((areacode & sC0Min1Min) == sC0Min1Min) {
367 return fCorners[0];
368 } else if ((areacode & sC0Max1Min) == sC0Max1Min) {
369 return fCorners[1];
370 } else if ((areacode & sC0Max1Max) == sC0Max1Max) {
371 return fCorners[2];
372 } else if ((areacode & sC0Min1Max) == sC0Min1Max) {
373 return fCorners[3];
374 } else {
375 G4cerr << "ERROR - G4VTwistSurface::GetCorner()" << G4endl
376 << " areacode = " << areacode << G4endl;
377 G4Exception("G4VTwistSurface::GetCorner()", "NotSupported",
378 FatalException, "Configuration not supported.");
379 }
380 return fCorners[0];
381}
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