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25 // 25 //
26 // Class G4VoxelLimits implementation <<
27 // 26 //
28 // 13.07.95, P.Kent - Initial version << 27 //
>> 28 // class G4VoxelLimits
>> 29 //
>> 30 // Implementation
>> 31 //
>> 32 // History:
>> 33 //
>> 34 // 14.03.02 V. Grichine, cosmetics
>> 35 // 13.07.95 P.Kent Initial version
29 // ------------------------------------------- 36 // --------------------------------------------------------------------
30 37
31 #include "G4VoxelLimits.hh" 38 #include "G4VoxelLimits.hh"
32 39
33 #include "G4ios.hh" 40 #include "G4ios.hh"
34 41
35 ////////////////////////////////////////////// 42 ///////////////////////////////////////////////////////////////////////////
36 // 43 //
>> 44 // Empty constructor and destructor
>> 45 //
>> 46
>> 47 G4VoxelLimits::G4VoxelLimits()
>> 48 : fxAxisMin(-kInfinity),fxAxisMax(kInfinity),
>> 49 fyAxisMin(-kInfinity),fyAxisMax(kInfinity),
>> 50 fzAxisMin(-kInfinity),fzAxisMax(kInfinity)
>> 51 {
>> 52 }
>> 53
>> 54 G4VoxelLimits::~G4VoxelLimits()
>> 55 {
>> 56 }
>> 57
>> 58 ///////////////////////////////////////////////////////////////////////////
>> 59 //
37 // Further restrict limits 60 // Further restrict limits
38 // No checks for illegal restrictions 61 // No checks for illegal restrictions
39 // 62 //
>> 63
40 void G4VoxelLimits::AddLimit( const EAxis pAxi 64 void G4VoxelLimits::AddLimit( const EAxis pAxis,
41 const G4double p 65 const G4double pMin,
42 const G4double p 66 const G4double pMax )
43 { 67 {
44 if ( pAxis == kXAxis ) 68 if ( pAxis == kXAxis )
45 { 69 {
46 if ( pMin > fxAxisMin ) fxAxisMin = pMin ; 70 if ( pMin > fxAxisMin ) fxAxisMin = pMin ;
47 if ( pMax < fxAxisMax ) fxAxisMax = pMax ; 71 if ( pMax < fxAxisMax ) fxAxisMax = pMax ;
48 } 72 }
49 else if ( pAxis == kYAxis ) 73 else if ( pAxis == kYAxis )
50 { 74 {
51 if ( pMin > fyAxisMin ) fyAxisMin = pMin ; 75 if ( pMin > fyAxisMin ) fyAxisMin = pMin ;
52 if ( pMax < fyAxisMax ) fyAxisMax = pMax ; 76 if ( pMax < fyAxisMax ) fyAxisMax = pMax ;
53 } 77 }
54 else 78 else
55 { 79 {
56 assert( pAxis == kZAxis ) ; 80 assert( pAxis == kZAxis ) ;
57 81
58 if ( pMin > fzAxisMin ) fzAxisMin = pMin ; 82 if ( pMin > fzAxisMin ) fzAxisMin = pMin ;
59 if ( pMax < fzAxisMax ) fzAxisMax = pMax ; 83 if ( pMax < fzAxisMax ) fzAxisMax = pMax ;
60 } 84 }
61 } 85 }
62 86
63 ////////////////////////////////////////////// 87 ///////////////////////////////////////////////////////////////////////////
64 // 88 //
65 // ClipToLimits 89 // ClipToLimits
66 // 90 //
67 // Clip the line segment pStart->pEnd to the v 91 // Clip the line segment pStart->pEnd to the volume described by the
68 // current limits. Return true if the line rem 92 // current limits. Return true if the line remains after clipping,
69 // else false, and leave the vectors in an und 93 // else false, and leave the vectors in an undefined state.
70 // 94 //
71 // Process: 95 // Process:
72 // 96 //
73 // Use Cohen-Sutherland clipping in 3D 97 // Use Cohen-Sutherland clipping in 3D
74 // [Fundamentals of Interactive Computer Graph 98 // [Fundamentals of Interactive Computer Graphics,Foley & Van Dam]
75 // 99 //
>> 100
76 G4bool G4VoxelLimits::ClipToLimits( G4ThreeVec 101 G4bool G4VoxelLimits::ClipToLimits( G4ThreeVector& pStart,
77 G4ThreeVec 102 G4ThreeVector& pEnd ) const
78 { 103 {
79 G4int sCode, eCode ; 104 G4int sCode, eCode ;
80 G4bool remainsAfterClip ; 105 G4bool remainsAfterClip ;
81 106
82 // Determine if line is trivially inside (bo 107 // Determine if line is trivially inside (both outcodes==0) or outside
83 // (logical AND of outcodes !=0) 108 // (logical AND of outcodes !=0)
84 109
85 sCode = OutCode(pStart) ; 110 sCode = OutCode(pStart) ;
86 eCode = OutCode(pEnd) ; 111 eCode = OutCode(pEnd) ;
87 112
88 if ( (sCode & eCode) != 0 ) << 113 if ( sCode & eCode )
89 { 114 {
90 // Trivially outside, no intersection with 115 // Trivially outside, no intersection with region
91 116
92 remainsAfterClip = false; 117 remainsAfterClip = false;
93 } 118 }
94 else if ( sCode == 0 && eCode == 0 ) 119 else if ( sCode == 0 && eCode == 0 )
95 { 120 {
96 // Trivially inside, no intersections 121 // Trivially inside, no intersections
97 122
98 remainsAfterClip = true ; 123 remainsAfterClip = true ;
99 } 124 }
100 else 125 else
101 { 126 {
102 // Line segment *may* cut volume boundarie 127 // Line segment *may* cut volume boundaries
103 // At most, one end point is inside 128 // At most, one end point is inside
104 129
105 G4double x1, y1, z1, x2, y2, z2 ; 130 G4double x1, y1, z1, x2, y2, z2 ;
106 131
107 x1 = pStart.x() ; 132 x1 = pStart.x() ;
108 y1 = pStart.y() ; 133 y1 = pStart.y() ;
109 z1 = pStart.z() ; 134 z1 = pStart.z() ;
110 135
111 x2 = pEnd.x() ; 136 x2 = pEnd.x() ;
112 y2 = pEnd.y() ; 137 y2 = pEnd.y() ;
113 z2 = pEnd.z() ; 138 z2 = pEnd.z() ;
114 << 139 /*
>> 140 if( std::abs(x1-x2) < kCarTolerance*kCarTolerance)
>> 141 {
>> 142 G4cout<<"x1 = "<<x1<<"\t"<<"x2 = "<<x2<<G4endl;
>> 143 }
>> 144 if( std::abs(y1-y2) < kCarTolerance*kCarTolerance)
>> 145 {
>> 146 G4cout<<"y1 = "<<y1<<"\t"<<"y2 = "<<y2<<G4endl;
>> 147 }
>> 148 if( std::abs(z1-z2) < kCarTolerance*kCarTolerance)
>> 149 {
>> 150 G4cout<<"z1 = "<<z1<<"\t"<<"z2 = "<<z2<<G4endl;
>> 151 }
>> 152 */
115 while ( sCode != eCode ) // Loop checking 153 while ( sCode != eCode ) // Loop checking, 06.08.2015, G.Cosmo
116 { 154 {
117 // Copy vectors to work variables x1-z1, 155 // Copy vectors to work variables x1-z1,x2-z2
118 // Ensure x1-z1 lies outside volume, swa 156 // Ensure x1-z1 lies outside volume, swapping vectors and outcodes
119 // if necessary 157 // if necessary
120 158
121 if ( sCode != 0 ) << 159 if ( sCode )
122 { 160 {
123 if ( (sCode & 0x01) != 0 ) // Clip ag << 161 if ( sCode & 0x01 ) // Clip against fxAxisMin
124 { 162 {
125 z1 += (fxAxisMin-x1)*(z2-z1)/(x2-x1) 163 z1 += (fxAxisMin-x1)*(z2-z1)/(x2-x1);
126 y1 += (fxAxisMin-x1)*(y2-y1)/(x2-x1) 164 y1 += (fxAxisMin-x1)*(y2-y1)/(x2-x1);
127 x1 = fxAxisMin; 165 x1 = fxAxisMin;
128 } 166 }
129 else if ( (sCode & 0x02) != 0 ) // Cli << 167 else if ( sCode & 0x02 ) // Clip against fxAxisMax
130 { 168 {
131 z1 += (fxAxisMax-x1)*(z2-z1)/(x2-x1) 169 z1 += (fxAxisMax-x1)*(z2-z1)/(x2-x1);
132 y1 += (fxAxisMax-x1)*(y2-y1)/(x2-x1) 170 y1 += (fxAxisMax-x1)*(y2-y1)/(x2-x1);
133 x1 = fxAxisMax ; 171 x1 = fxAxisMax ;
134 } 172 }
135 else if ( (sCode & 0x04) != 0 ) // Cl << 173 else if ( sCode & 0x04 ) // Clip against fyAxisMin
136 { 174 {
137 x1 += (fyAxisMin-y1)*(x2-x1)/(y2-y1) 175 x1 += (fyAxisMin-y1)*(x2-x1)/(y2-y1);
138 z1 += (fyAxisMin-y1)*(z2-z1)/(y2-y1) 176 z1 += (fyAxisMin-y1)*(z2-z1)/(y2-y1);
139 y1 = fyAxisMin; 177 y1 = fyAxisMin;
140 } 178 }
141 else if ( (sCode & 0x08) != 0 ) // Cl << 179 else if ( sCode & 0x08 ) // Clip against fyAxisMax
142 { 180 {
143 x1 += (fyAxisMax-y1)*(x2-x1)/(y2-y1) 181 x1 += (fyAxisMax-y1)*(x2-x1)/(y2-y1);
144 z1 += (fyAxisMax-y1)*(z2-z1)/(y2-y1) 182 z1 += (fyAxisMax-y1)*(z2-z1)/(y2-y1);
145 y1 = fyAxisMax; 183 y1 = fyAxisMax;
146 } 184 }
147 else if ( (sCode & 0x10) != 0 ) // Cl << 185 else if ( sCode & 0x10 ) // Clip against fzAxisMin
148 { 186 {
149 x1 += (fzAxisMin-z1)*(x2-x1)/(z2-z1) 187 x1 += (fzAxisMin-z1)*(x2-x1)/(z2-z1);
150 y1 += (fzAxisMin-z1)*(y2-y1)/(z2-z1) 188 y1 += (fzAxisMin-z1)*(y2-y1)/(z2-z1);
151 z1 = fzAxisMin; 189 z1 = fzAxisMin;
152 } 190 }
153 else if ( (sCode & 0x20) != 0 ) // Cl << 191 else if ( sCode & 0x20 ) // Clip against fzAxisMax
154 { 192 {
155 x1 += (fzAxisMax-z1)*(x2-x1)/(z2-z1) 193 x1 += (fzAxisMax-z1)*(x2-x1)/(z2-z1);
156 y1 += (fzAxisMax-z1)*(y2-y1)/(z2-z1) 194 y1 += (fzAxisMax-z1)*(y2-y1)/(z2-z1);
157 z1 = fzAxisMax; 195 z1 = fzAxisMax;
158 } 196 }
159 } 197 }
160 if ( eCode != 0 ) // Clip 2nd end: repe << 198 if ( eCode ) // Clip 2nd end: repeat of 1st, but 1<>2
161 { 199 {
162 if ( (eCode & 0x01) != 0 ) // Clip ag << 200 if ( eCode & 0x01 ) // Clip against fxAxisMin
163 { 201 {
164 z2 += (fxAxisMin-x2)*(z1-z2)/(x1-x2) 202 z2 += (fxAxisMin-x2)*(z1-z2)/(x1-x2);
165 y2 += (fxAxisMin-x2)*(y1-y2)/(x1-x2) 203 y2 += (fxAxisMin-x2)*(y1-y2)/(x1-x2);
166 x2 = fxAxisMin; 204 x2 = fxAxisMin;
167 } 205 }
168 else if ( (eCode & 0x02) != 0 ) // Cl << 206 else if ( eCode & 0x02 ) // Clip against fxAxisMax
169 { 207 {
170 z2 += (fxAxisMax-x2)*(z1-z2)/(x1-x2) 208 z2 += (fxAxisMax-x2)*(z1-z2)/(x1-x2);
171 y2 += (fxAxisMax-x2)*(y1-y2)/(x1-x2) 209 y2 += (fxAxisMax-x2)*(y1-y2)/(x1-x2);
172 x2 = fxAxisMax; 210 x2 = fxAxisMax;
173 } 211 }
174 else if ( (eCode & 0x04) != 0 ) // Cl << 212 else if ( eCode & 0x04 ) // Clip against fyAxisMin
175 { 213 {
176 x2 += (fyAxisMin-y2)*(x1-x2)/(y1-y2) 214 x2 += (fyAxisMin-y2)*(x1-x2)/(y1-y2);
177 z2 += (fyAxisMin-y2)*(z1-z2)/(y1-y2) 215 z2 += (fyAxisMin-y2)*(z1-z2)/(y1-y2);
178 y2 = fyAxisMin; 216 y2 = fyAxisMin;
179 } 217 }
180 else if ((eCode&0x08) != 0) // Clip a << 218 else if (eCode&0x08) // Clip against fyAxisMax
181 { 219 {
182 x2 += (fyAxisMax-y2)*(x1-x2)/(y1-y2) 220 x2 += (fyAxisMax-y2)*(x1-x2)/(y1-y2);
183 z2 += (fyAxisMax-y2)*(z1-z2)/(y1-y2) 221 z2 += (fyAxisMax-y2)*(z1-z2)/(y1-y2);
184 y2 = fyAxisMax; 222 y2 = fyAxisMax;
185 } 223 }
186 else if ( (eCode & 0x10) != 0 ) // Cl << 224 else if ( eCode & 0x10 ) // Clip against fzAxisMin
187 { 225 {
188 x2 += (fzAxisMin-z2)*(x1-x2)/(z1-z2) 226 x2 += (fzAxisMin-z2)*(x1-x2)/(z1-z2);
189 y2 += (fzAxisMin-z2)*(y1-y2)/(z1-z2) 227 y2 += (fzAxisMin-z2)*(y1-y2)/(z1-z2);
190 z2 = fzAxisMin; 228 z2 = fzAxisMin;
191 } 229 }
192 else if ( (eCode & 0x20) != 0 ) // Cl << 230 else if ( eCode & 0x20 ) // Clip against fzAxisMax
193 { 231 {
194 x2 += (fzAxisMax-z2)*(x1-x2)/(z1-z2) 232 x2 += (fzAxisMax-z2)*(x1-x2)/(z1-z2);
195 y2 += (fzAxisMax-z2)*(y1-y2)/(z1-z2) 233 y2 += (fzAxisMax-z2)*(y1-y2)/(z1-z2);
196 z2 = fzAxisMax; 234 z2 = fzAxisMax;
197 } 235 }
198 } 236 }
>> 237 // G4endl; G4cout<<"x1 = "<<x1<<"\t"<<"x2 = "<<x2<<G4endl<<G4endl;
199 pStart = G4ThreeVector(x1,y1,z1); 238 pStart = G4ThreeVector(x1,y1,z1);
200 pEnd = G4ThreeVector(x2,y2,z2); 239 pEnd = G4ThreeVector(x2,y2,z2);
201 sCode = OutCode(pStart); 240 sCode = OutCode(pStart);
202 eCode = OutCode(pEnd); 241 eCode = OutCode(pEnd);
203 } 242 }
204 remainsAfterClip = sCode == 0 && eCode == << 243 if ( sCode == 0 && eCode == 0 ) remainsAfterClip = true;
>> 244 else remainsAfterClip = false;
205 } 245 }
206 return remainsAfterClip; 246 return remainsAfterClip;
207 } 247 }
208 248
209 ////////////////////////////////////////////// 249 ////////////////////////////////////////////////////////////////////////////
210 // 250 //
211 // Calculate the `outcode' for the specified v 251 // Calculate the `outcode' for the specified vector:
212 // The following bits are set: 252 // The following bits are set:
213 // 0 pVec.x()<fxAxisMin && IsXLimited() 253 // 0 pVec.x()<fxAxisMin && IsXLimited()
214 // 1 pVec.x()>fxAxisMax && IsXLimited() 254 // 1 pVec.x()>fxAxisMax && IsXLimited()
215 // 2 pVec.y()<fyAxisMin && IsYLimited() 255 // 2 pVec.y()<fyAxisMin && IsYLimited()
216 // 3 pVec.y()>fyAxisMax && IsYLimited() 256 // 3 pVec.y()>fyAxisMax && IsYLimited()
217 // 4 pVec.z()<fzAxisMin && IsZLimited() 257 // 4 pVec.z()<fzAxisMin && IsZLimited()
218 // 5 pVec.z()>fzAxisMax && IsZLimited() 258 // 5 pVec.z()>fzAxisMax && IsZLimited()
219 // 259 //
>> 260
220 G4int G4VoxelLimits::OutCode( const G4ThreeVec 261 G4int G4VoxelLimits::OutCode( const G4ThreeVector& pVec ) const
221 { 262 {
222 G4int code = 0 ; // The outco 263 G4int code = 0 ; // The outcode
223 264
224 if ( IsXLimited() ) 265 if ( IsXLimited() )
225 { 266 {
226 if ( pVec.x() < fxAxisMin ) code |= 0x01 ; 267 if ( pVec.x() < fxAxisMin ) code |= 0x01 ;
227 if ( pVec.x() > fxAxisMax ) code |= 0x02 ; 268 if ( pVec.x() > fxAxisMax ) code |= 0x02 ;
228 } 269 }
229 if ( IsYLimited() ) 270 if ( IsYLimited() )
230 { 271 {
231 if ( pVec.y() < fyAxisMin ) code |= 0x04 ; 272 if ( pVec.y() < fyAxisMin ) code |= 0x04 ;
232 if ( pVec.y() > fyAxisMax ) code |= 0x08 ; 273 if ( pVec.y() > fyAxisMax ) code |= 0x08 ;
233 } 274 }
234 if (IsZLimited()) 275 if (IsZLimited())
235 { 276 {
236 if ( pVec.z() < fzAxisMin ) code |= 0x10 ; 277 if ( pVec.z() < fzAxisMin ) code |= 0x10 ;
237 if ( pVec.z() > fzAxisMax ) code |= 0x20 ; 278 if ( pVec.z() > fzAxisMax ) code |= 0x20 ;
238 } 279 }
239 return code; 280 return code;
240 } 281 }
241 282
242 ////////////////////////////////////////////// 283 ///////////////////////////////////////////////////////////////////////////////
243 284
244 std::ostream& operator << (std::ostream& os, c 285 std::ostream& operator << (std::ostream& os, const G4VoxelLimits& pLim)
245 { 286 {
246 os << "{"; 287 os << "{";
247 if (pLim.IsXLimited()) 288 if (pLim.IsXLimited())
248 { 289 {
249 os << "(" << pLim.GetMinXExtent() 290 os << "(" << pLim.GetMinXExtent()
250 << "," << pLim.GetMaxXExtent() 291 << "," << pLim.GetMaxXExtent() << ") ";
251 } 292 }
252 else 293 else
253 { 294 {
254 os << "(-,-) "; 295 os << "(-,-) ";
255 } 296 }
256 if (pLim.IsYLimited()) 297 if (pLim.IsYLimited())
257 { 298 {
258 os << "(" << pLim.GetMinYExtent() 299 os << "(" << pLim.GetMinYExtent()
259 << "," << pLim.GetMaxYExtent() 300 << "," << pLim.GetMaxYExtent() << ") ";
260 } 301 }
261 else 302 else
262 { 303 {
263 os << "(-,-) "; 304 os << "(-,-) ";
264 } 305 }
265 if (pLim.IsZLimited()) 306 if (pLim.IsZLimited())
266 { 307 {
267 os << "(" << pLim.GetMinZExtent() 308 os << "(" << pLim.GetMinZExtent()
268 << "," << pLim.GetMaxZExtent() 309 << "," << pLim.GetMaxZExtent() << ")";
269 } 310 }
270 else 311 else
271 { 312 {
272 os << "(-,-)"; 313 os << "(-,-)";
273 } 314 }
274 os << "}"; 315 os << "}";
275 return os; 316 return os;
276 } 317 }
277 318