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25 //
26 // class G4PartialPhantomParameterisation implementation
27 //
28 // May 2007 Pedro Arce (CIEMAT), first version
29 // --------------------------------------------------------------------
30
31 #include "G4PartialPhantomParameterisation.hh"
32
33 #include "globals.hh"
34 #include "G4Material.hh"
35 #include "G4VSolid.hh"
36 #include "G4VPhysicalVolume.hh"
37 #include "G4LogicalVolume.hh"
38 #include "G4VVolumeMaterialScanner.hh"
39 #include "G4GeometryTolerance.hh"
40
41 #include <list>
42
43 //------------------------------------------------------------------
44 void G4PartialPhantomParameterisation::
45 ComputeTransformation( const G4int copyNo, G4VPhysicalVolume *physVol ) const
46 {
47 // Voxels cannot be rotated, return translation
48 //
49 G4ThreeVector trans = GetTranslation( copyNo );
50 physVol->SetTranslation( trans );
51 }
52
53
54 //------------------------------------------------------------------
55 G4ThreeVector G4PartialPhantomParameterisation::
56 GetTranslation(const G4int copyNo ) const
57 {
58 CheckCopyNo( copyNo );
59
60 std::size_t nx, ny, nz;
61 ComputeVoxelIndices( copyNo, nx, ny, nz );
62
63 G4ThreeVector trans( (2*nx+1)*fVoxelHalfX - fContainerWallX,
64 (2*ny+1)*fVoxelHalfY - fContainerWallY,
65 (2*nz+1)*fVoxelHalfZ - fContainerWallZ);
66 return trans;
67 }
68
69
70 //------------------------------------------------------------------
71 G4Material* G4PartialPhantomParameterisation::
72 ComputeMaterial( const G4int copyNo, G4VPhysicalVolume*, const G4VTouchable* )
73 {
74 CheckCopyNo( copyNo );
75 auto matIndex = GetMaterialIndex(copyNo);
76
77 return fMaterials[ matIndex ];
78 }
79
80
81 //------------------------------------------------------------------
82 size_t G4PartialPhantomParameterisation::
83 GetMaterialIndex( std::size_t copyNo ) const
84 {
85 CheckCopyNo( copyNo );
86
87 if( fMaterialIndices == nullptr ) { return 0; }
88
89 return *(fMaterialIndices+copyNo);
90 }
91
92
93 //------------------------------------------------------------------
94 size_t G4PartialPhantomParameterisation::
95 GetMaterialIndex( std::size_t nx, std::size_t ny, std::size_t nz ) const
96 {
97 std::size_t copyNo = nx + fNoVoxelsX*ny + fNoVoxelsXY*nz;
98 return GetMaterialIndex( copyNo );
99 }
100
101
102 //------------------------------------------------------------------
103 G4Material* G4PartialPhantomParameterisation::
104 GetMaterial( std::size_t nx, std::size_t ny, std::size_t nz) const
105 {
106 return fMaterials[GetMaterialIndex(nx,ny,nz)];
107 }
108
109
110 //------------------------------------------------------------------
111 G4Material* G4PartialPhantomParameterisation::
112 GetMaterial( std::size_t copyNo ) const
113 {
114 return fMaterials[GetMaterialIndex(copyNo)];
115 }
116
117
118 //------------------------------------------------------------------
119 void G4PartialPhantomParameterisation::
120 ComputeVoxelIndices(const G4int copyNo, std::size_t& nx,
121 std::size_t& ny, std::size_t& nz ) const
122 {
123 CheckCopyNo( copyNo );
124
125 auto ite = fFilledIDs.lower_bound(copyNo);
126 G4long dist = std::distance( fFilledIDs.cbegin(), ite );
127 nz = std::size_t( dist/fNoVoxelsY );
128 ny = std::size_t( dist%fNoVoxelsY );
129
130 G4int ifmin = (*ite).second;
131 G4int nvoxXprev;
132 if( dist != 0 )
133 {
134 ite--;
135 nvoxXprev = (*ite).first;
136 }
137 else
138 {
139 nvoxXprev = -1;
140 }
141
142 nx = ifmin+copyNo-nvoxXprev-1;
143 }
144
145
146 //------------------------------------------------------------------
147 G4int G4PartialPhantomParameterisation::
148 GetReplicaNo( const G4ThreeVector& localPoint, const G4ThreeVector& localDir )
149 {
150 // Check the voxel numbers corresponding to localPoint
151 // When a particle is on a surface, it may be between -kCarTolerance and
152 // +kCartolerance. By a simple distance as:
153 // G4int nx = G4int( (localPoint.x()+)/fVoxelHalfX/2.);
154 // those between -kCartolerance and 0 will be placed on voxel N-1 and those
155 // between 0 and kCarTolerance on voxel N.
156 // To avoid precision problems place the tracks that are on the surface on
157 // voxel N-1 if they have negative direction and on voxel N if they have
158 // positive direction.
159 // Add +kCarTolerance so that they are first placed on voxel N, and then
160 // if the direction is negative substract 1
161
162 G4double fx = (localPoint.x()+fContainerWallX+kCarTolerance)/(fVoxelHalfX*2.);
163 auto nx = G4int(fx);
164
165 G4double fy = (localPoint.y()+fContainerWallY+kCarTolerance)/(fVoxelHalfY*2.);
166 auto ny = G4int(fy);
167
168 G4double fz = (localPoint.z()+fContainerWallZ+kCarTolerance)/(fVoxelHalfZ*2.);
169 auto nz = G4int(fz);
170
171 // If it is on the surface side, check the direction: if direction is
172 // negative place it on the previous voxel (if direction is positive it is
173 // already in the next voxel...).
174 // Correct also cases where n = -1 or n = fNoVoxels. It is always traced to be
175 // due to multiple scattering: track is entering a voxel but multiple
176 // scattering changes the angle towards outside
177 //
178 if( fx - nx < kCarTolerance/fVoxelHalfX )
179 {
180 if( localDir.x() < 0 )
181 {
182 if( nx != 0 )
183 {
184 nx -= 1;
185 }
186 }
187 else
188 {
189 if( nx == G4int(fNoVoxelsX) )
190 {
191 nx -= 1;
192 }
193 }
194 }
195 if( fy - ny < kCarTolerance/fVoxelHalfY )
196 {
197 if( localDir.y() < 0 )
198 {
199 if( ny != 0 )
200 {
201 ny -= 1;
202 }
203 }
204 else
205 {
206 if( ny == G4int(fNoVoxelsY) )
207 {
208 ny -= 1;
209 }
210 }
211 }
212 if( fz - nz < kCarTolerance/fVoxelHalfZ )
213 {
214 if( localDir.z() < 0 )
215 {
216 if( nz != 0 )
217 {
218 nz -= 1;
219 }
220 }
221 else
222 {
223 if( nz == G4int(fNoVoxelsZ) )
224 {
225 nz -= 1;
226 }
227 }
228 }
229
230 // Check if there are still errors
231 //
232 G4bool isOK = true;
233 if( nx < 0 )
234 {
235 nx = 0;
236 isOK = false;
237 }
238 else if( nx >= G4int(fNoVoxelsX) )
239 {
240 nx = G4int(fNoVoxelsX)-1;
241 isOK = false;
242 }
243 if( ny < 0 )
244 {
245 ny = 0;
246 isOK = false;
247 }
248 else if( ny >= G4int(fNoVoxelsY) )
249 {
250 ny = G4int(fNoVoxelsY)-1;
251 isOK = false;
252 }
253 if( nz < 0 )
254 {
255 nz = 0;
256 isOK = false;
257 }
258 else if( nz >= G4int(fNoVoxelsZ) )
259 {
260 nz = G4int(fNoVoxelsZ)-1;
261 isOK = false;
262 }
263 if( !isOK )
264 {
265 std::ostringstream message;
266 message << "Corrected the copy number! It was negative or too big."
267 << G4endl
268 << " LocalPoint: " << localPoint << G4endl
269 << " LocalDir: " << localDir << G4endl
270 << " Voxel container size: " << fContainerWallX
271 << " " << fContainerWallY << " " << fContainerWallZ << G4endl
272 << " LocalPoint - wall: "
273 << localPoint.x()-fContainerWallX << " "
274 << localPoint.y()-fContainerWallY << " "
275 << localPoint.z()-fContainerWallZ;
276 G4Exception("G4PartialPhantomParameterisation::GetReplicaNo()",
277 "GeomNav1002", JustWarning, message);
278 }
279
280 auto nyz = G4int(nz*fNoVoxelsY+ny);
281 auto ite = fFilledIDs.cbegin();
282 /*
283 for( ite = fFilledIDs.cbegin(); ite != fFilledIDs.cend(); ++ite )
284 {
285 G4cout << " G4PartialPhantomParameterisation::GetReplicaNo filled "
286 << (*ite).first << " , " << (*ite).second << std::endl;
287 }
288 */
289
290 advance(ite,nyz);
291 auto iteant = ite; iteant--;
292 G4int copyNo = (*iteant).first + 1 + ( nx - (*ite).second );
293 /*
294 G4cout << " G4PartialPhantomParameterisation::GetReplicaNo getting copyNo "
295 << copyNo << " nyz " << nyz << " (*iteant).first "
296 << (*iteant).first << " (*ite).second " << (*ite).second << G4endl;
297
298 G4cout << " G4PartialPhantomParameterisation::GetReplicaNo " << copyNo
299 << " nx " << nx << " ny " << ny << " nz " << nz
300 << " localPoint " << localPoint << " localDir " << localDir << G4endl;
301 */
302 return copyNo;
303 }
304
305
306 //------------------------------------------------------------------
307 void G4PartialPhantomParameterisation::CheckCopyNo( const G4long copyNo ) const
308 {
309 if( copyNo < 0 || copyNo >= G4int(fNoVoxels) )
310 {
311 std::ostringstream message;
312 message << "Copy number is negative or too big!" << G4endl
313 << " Copy number: " << copyNo << G4endl
314 << " Total number of voxels: " << fNoVoxels;
315 G4Exception("G4PartialPhantomParameterisation::CheckCopyNo()",
316 "GeomNav0002", FatalErrorInArgument, message);
317 }
318 }
319
320
321 //------------------------------------------------------------------
322 void G4PartialPhantomParameterisation::BuildContainerWalls()
323 {
324 fContainerWallX = fNoVoxelsX * fVoxelHalfX;
325 fContainerWallY = fNoVoxelsY * fVoxelHalfY;
326 fContainerWallZ = fNoVoxelsZ * fVoxelHalfZ;
327 }
328