Geant4 11.1.1
Toolkit for the simulation of the passage of particles through matter
Loading...
Searching...
No Matches
SoTubs.cc
Go to the documentation of this file.
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//
28//
29/*-----------------------------HEPVis---------------------------------------*/
30/* */
31/* Node: SoTubs */
32/* Description: Represents the G4Tubs Geant Geometry entity */
33/* Author: Joe Boudreau Nov 11 1996 */
34/* */
35/*--------------------------------------------------------------------------*/
36
37// this :
38#include "HEPVis/nodes/SoTubs.h"
39
40#include <assert.h>
41#include <cmath>
42
43#include <Inventor/SbBox.h>
44#include <Inventor/actions/SoGLRenderAction.h>
45#include <Inventor/fields/SoSFFloat.h>
46#include <Inventor/misc/SoChildList.h>
47#include <Inventor/nodes/SoSeparator.h>
48#include <Inventor/nodes/SoIndexedFaceSet.h>
49#include <Inventor/nodes/SoNormal.h>
50#include <Inventor/nodes/SoCoordinate3.h>
51#include <Inventor/nodes/SoNormalBinding.h>
52#include <Inventor/SoPrimitiveVertex.h>
53#include <Inventor/elements/SoTextureCoordinateElement.h>
54
55#include "HEPVis/SbMath.h"
56
57// This statement is required
58SO_NODE_SOURCE(SoTubs)
59
60// Constructor
61SoTubs::SoTubs() {
62
63
64 // This statement is required
65 SO_NODE_CONSTRUCTOR(SoTubs);
66
67 // Data fields are initialized like this:
68 SO_NODE_ADD_FIELD(pRMin, (0));
69 SO_NODE_ADD_FIELD(pRMax, (1));
70 SO_NODE_ADD_FIELD(pDz, (10));
71 SO_NODE_ADD_FIELD(pSPhi, (0));
72 SO_NODE_ADD_FIELD(pDPhi, ((float)(2*M_PI)));
73 SO_NODE_ADD_FIELD(alternateRep, (NULL));
74 children = new SoChildList(this);
75}
76
77// Destructor
78SoTubs::~SoTubs() {
79 delete children;
80}
81
82
83// initClass
84void SoTubs::initClass(){
85 // This statement is required.
86 static bool first = true;
87 if (first) {
88 first = false;
89 SO_NODE_INIT_CLASS(SoTubs,SoShape,"Shape");
90 }
91}
92
93// generatePrimitives
94void SoTubs::generatePrimitives(SoAction *action) {
95 // This variable is used to store each vertex
96 SoPrimitiveVertex pv;
97
98 // Access the stat from the action
99 SoState *state = action->getState();
100
101 // See if we have to use a texture coordinate function,
102 // rather than generating explicit texture coordinates.
103 SbBool useTexFunction=
104 (SoTextureCoordinateElement::getType(state) ==
105 SoTextureCoordinateElement::FUNCTION);
106
107 // If we need to generate texture coordinates with a function,
108 // we'll need an SoGLTextureCoordinateElement. Otherwise, we'll
109 // set up the coordinates directly.
110 const SoTextureCoordinateElement* tce = NULL;
111 SbVec4f texCoord;
112 if (useTexFunction) {
113 tce = SoTextureCoordinateElement::getInstance(state);
114 }
115 else {
116 texCoord[2] = 0.0;
117 texCoord[3] = 1.0;
118 }
119 SbVec3f point, normal;
120
121
122 ///////////////////////////////////////////////////////
123 //-----------------------------------------------------
124#define GEN_VERTEX(pv,x,y,z,s,t,nx,ny,nz) \
125 point.setValue((float)(x),(float)(y),(float)(z)); \
126 normal.setValue((float)(nx),(float)(ny),(float)(nz)); \
127 if (useTexFunction) { \
128 texCoord=tce->get(point,normal); \
129 } else { \
130 texCoord[0]=(float)(s); \
131 texCoord[1]=(float)(t); \
132 } \
133 pv.setPoint(point); \
134 pv.setNormal(normal); \
135 pv.setTextureCoords(texCoord); \
136 shapeVertex(&pv);
137 //-----------------------------------------------------
138 ///////////////////////////////////////////////////////
139
140 int NPHI = (int)(2+22*std::fabs(pDPhi.getValue()/(2.0*M_PI)));
141 double deltaPhi = pDPhi.getValue()/NPHI, phi0 = pSPhi.getValue(),phi1=phi0+pDPhi.getValue();
142 double rMax=pRMax.getValue(),rMin=pRMin.getValue();
143 double zMax=pDz.getValue(),zMin=-zMax;
144 double cosPhi0=std::cos(phi0), sinPhi0=std::sin(phi0);
145 double cosPhi1=std::cos(phi1), sinPhi1=std::sin(phi1);
146 double cosDeltaPhi=std::cos(deltaPhi),sinDeltaPhi=std::sin(deltaPhi);
147 //
148 // The outer surface!
149 //
150 int i;
151 double sinPhi,cosPhi;
152 beginShape(action,TRIANGLE_STRIP);
153 sinPhi=sinPhi0;
154 cosPhi=cosPhi0;
155 for (i = 0; i<=NPHI; i++) {
156 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMax,0.0,0.0,cosPhi,sinPhi,0);
157 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMin,1.0,1.0,cosPhi,sinPhi,0);
158 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
159 }
160 endShape();
161 //
162 // The inner surface!
163 //
164 if(rMin!=0.F) {
165 beginShape(action,TRIANGLE_STRIP);
166 sinPhi=sinPhi0;
167 cosPhi=cosPhi0;
168 for (i = 0; i<=NPHI; i++) {
169 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMax,0.0,0.0,-cosPhi,-sinPhi,0);
170 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMin,1.0,1.0,-cosPhi,-sinPhi,0);
171 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
172 }
173 endShape();
174 }
175 if (std::fabs(deltaPhi)<2.0*M_PI) {
176 //
177 // The end
178 //
179 beginShape(action,TRIANGLE_STRIP);
180 sinPhi=sinPhi0;
181 cosPhi=cosPhi0;
182 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMax,0.0,0.0,sinPhi,-cosPhi,0);
183 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMin,1.0,1.0,sinPhi,-cosPhi,0);
184 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMax,1.0,0.0,sinPhi,-cosPhi,0);
185 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMin,0.0,1.0,sinPhi,-cosPhi,0);
186 endShape();
187 //
188 // The other end
189 //
190 beginShape(action,TRIANGLE_STRIP);
191 sinPhi=sinPhi1;
192 cosPhi=cosPhi1;
193 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi, zMax,0.0,0.0,-sinPhi,+cosPhi,0);
194 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi, zMin,1.0,1.0,-sinPhi,+cosPhi,0);
195 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi, zMax,1.0,0.0,-sinPhi,+cosPhi,0);
196 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi, zMin,0.0,1.0,-sinPhi,+cosPhi,0);
197 endShape();
198 }
199 //
200 // The outer surface at z=+PDZ
201 //
202 if(rMin==0.F) {
203 beginShape(action,TRIANGLE_FAN);
204 sinPhi=sinPhi0;
205 cosPhi=cosPhi0;
206 GEN_VERTEX(pv,0,0,zMax,0.0,0.0,0,0,1);
207 for (i = 0; i<=NPHI; i++) {
208 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMax,1.0,1.0,0,0,1);
209 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
210 }
211 endShape();
212 //
213 // The outer surface at z=-PDZ
214 //
215 beginShape(action,TRIANGLE_FAN);
216 sinPhi=sinPhi0;
217 cosPhi=cosPhi0;
218 GEN_VERTEX(pv,0,0,zMin,0.0,0.0,0,0,-1);
219 for (i = 0; i<=NPHI; i++) {
220 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMin,1.0,1.0,0,0,-1);
221 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
222 }
223 endShape();
224 } else {
225 beginShape(action,TRIANGLE_STRIP);
226 sinPhi=sinPhi0;
227 cosPhi=cosPhi0;
228 for (i = 0; i<=NPHI; i++) {
229 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMax,0.0,0.0,0,0,1);
230 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMax,1.0,1.0,0,0,1);
231 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
232 }
233 endShape();
234 //
235 // The outer surface at z=-PDZ
236 //
237 beginShape(action,TRIANGLE_STRIP);
238 sinPhi=sinPhi0;
239 cosPhi=cosPhi0;
240 for (i = 0; i<=NPHI; i++) {
241 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMin,0.0,0.0,0,0,-1);
242 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMin,1.0,1.0,0,0,-1);
243 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
244 }
245 endShape();
246 }
247}
248
249// getChildren
250SoChildList *SoTubs::getChildren() const {
251 return children;
252}
253
254
255// computeBBox
256void SoTubs::computeBBox(SoAction *, SbBox3f &box, SbVec3f &center ){
257 SbVec3f vmin(-pRMax.getValue(),-pRMax.getValue(),-pDz.getValue()),
258 vmax( pRMax.getValue(), pRMax.getValue(), pDz.getValue());
259 center.setValue(0,0,0);
260 box.setBounds(vmin,vmax);
261}
262
263
264// updateChildren
265void SoTubs::updateChildren() {
266
267 // Redraw the G4Tubs....
268
269 assert(children->getLength()==1);
270 SoSeparator *sep = (SoSeparator *) ( *children)[0];
271 SoCoordinate3 *theCoordinates = (SoCoordinate3 *) ( sep->getChild(0));
272 SoNormal *theNormals = (SoNormal *) ( sep->getChild(1));
273 SoNormalBinding *theNormalBinding = (SoNormalBinding *) ( sep->getChild(2));
274 SoIndexedFaceSet *theFaceSet = (SoIndexedFaceSet *) ( sep->getChild(3));
275
276
277 const int NPHI=24, NPOINTS=2*(2*NPHI+2), NFACES=4*NPHI+2, NINDICES = NFACES*5;
278 float points[NPOINTS][3],normals[NFACES][3];
279#ifdef INVENTOR2_0
280 static long indices[NINDICES];
281#else
282 static int32_t indices[NINDICES];
283#endif
284
285 static int init=0;
286 double phi, pp, DeltaPhi;
287
288 // Indices need to be generated once! This is here to keep it close to the point
289 // generation, since otherwise it will be confusing.
290
291 int i;
292 if (!init) {
293 init = 1;
294 // Outer face
295 for (i = 0; i< NPHI; i++) {
296 // 0 1 3 2;
297 indices[5*i+0] = 2*i+0;
298 indices[5*i+1] = 2*i+1;
299 indices[5*i+2] = 2*i+3;
300 indices[5*i+3] = 2*i+2;
301 indices[5*i+4] = SO_END_FACE_INDEX;
302 }
303 // the inner face
304 for (i=0;i<NPHI;i++) {
305 indices[5*1*NPHI + 5*i+0] = 2*NPHI+2 + 2*i+0;
306 indices[5*1*NPHI + 5*i+1] = 2*NPHI+2 + 2*i+1;
307 indices[5*1*NPHI + 5*i+2] = 2*NPHI+2 + 2*i+3;
308 indices[5*1*NPHI + 5*i+3] = 2*NPHI+2 + 2*i+2;
309 indices[5*1*NPHI + 5*i+4] = SO_END_FACE_INDEX;
310 }
311 // the top side
312 for (i=0;i<NPHI;i++) {
313 indices[5*2*NPHI + 5*i+0] = 2*i+0;
314 indices[5*2*NPHI + 5*i+1] = 2*i+2;
315 indices[5*2*NPHI + 5*i+2] = NPOINTS - (2*i+4);
316 indices[5*2*NPHI + 5*i+3] = NPOINTS - (2*i+2);
317 indices[5*2*NPHI + 5*i+4] = SO_END_FACE_INDEX;
318 }
319 // the bottom side
320 for (i=0;i<NPHI;i++) {
321 indices[5*3*NPHI + 5*i+0] = 2*i+1;
322 indices[5*3*NPHI + 5*i+1] = NPOINTS - (2*i+1);
323 indices[5*3*NPHI + 5*i+2] = NPOINTS - (2*i+3);
324 indices[5*3*NPHI + 5*i+3] = 2*i+3;
325 indices[5*3*NPHI + 5*i+4] = SO_END_FACE_INDEX;
326 }
327 // the odd side
328 indices[5*4*NPHI +0] = 2*NPHI;
329 indices[5*4*NPHI +1] = 2*NPHI+1;
330 indices[5*4*NPHI +2] = 2*NPHI+3;
331 indices[5*4*NPHI +3] = 2*NPHI+2;
332 indices[5*4*NPHI +4] = SO_END_FACE_INDEX;
333 // aother odd side
334 indices[5*4*NPHI +5 +0] = 0;
335 indices[5*4*NPHI +5 +1] = NPOINTS-2;
336 indices[5*4*NPHI +5 +2] = NPOINTS-1;
337 indices[5*4*NPHI +5 +3] = 1;
338 indices[5*4*NPHI +5 +4] = SO_END_FACE_INDEX;
339 }
340 // Points need to be generated each time:
341 if (pDPhi.getValue()<2*M_PI) {
342 // the odd side
343 indices[5*4*NPHI +0] = 2*NPHI;
344 indices[5*4*NPHI +1] = 2*NPHI+1;
345 indices[5*4*NPHI +2] = 2*NPHI+3;
346 indices[5*4*NPHI +3] = 2*NPHI+2;
347 indices[5*4*NPHI +4] = SO_END_FACE_INDEX;
348 // aother odd side
349 indices[5*4*NPHI +5 +0] = 0;
350 indices[5*4*NPHI +5 +1] = NPOINTS-2;
351 indices[5*4*NPHI +5 +2] = NPOINTS-1;
352 indices[5*4*NPHI +5 +3] = 1;
353 indices[5*4*NPHI +5 +4] = SO_END_FACE_INDEX;
354 }
355 else {
356 // the odd side
357 indices[5*4*NPHI +0] = SO_END_FACE_INDEX;
358 indices[5*4*NPHI +1] = SO_END_FACE_INDEX;
359 indices[5*4*NPHI +2] = SO_END_FACE_INDEX;
360 indices[5*4*NPHI +3] = SO_END_FACE_INDEX;
361 indices[5*4*NPHI +4] = SO_END_FACE_INDEX;
362 // aother odd side
363 indices[5*4*NPHI +5 +0] = SO_END_FACE_INDEX;
364 indices[5*4*NPHI +5 +1] = SO_END_FACE_INDEX;
365 indices[5*4*NPHI +5 +2] = SO_END_FACE_INDEX;
366 indices[5*4*NPHI +5 +3] = SO_END_FACE_INDEX;
367 indices[5*4*NPHI +5 +4] = SO_END_FACE_INDEX;
368 }
369 // The outer surface
370 DeltaPhi = pDPhi.getValue()/NPHI, phi = pSPhi.getValue();
371 for (i = 0; i<=NPHI; i++) {
372 points[2*i+0][0] = pRMax.getValue()*FCOS(phi);
373 points[2*i+0][1]= pRMax.getValue()*FSIN(phi);
374 points[2*i+0][2] = +pDz.getValue();
375
376 points[2*i+1][0] = pRMax.getValue()*FCOS(phi);
377 points[2*i+1][1]= pRMax.getValue()*FSIN(phi);
378 points[2*i+1][2] = -pDz.getValue();
379
380 pp = phi+DeltaPhi/2.0;
381 if (i!=NPHI) {
382 normals[i][0] = FCOS(pp);
383 normals[i][1] = FSIN(pp);
384 normals[i][2] = 0;
385 }
386 phi+=DeltaPhi;
387 }
388 // The inner surface
389 phi = pSPhi.getValue() + pDPhi.getValue();
390 for (i = 0; i<=NPHI; i++) {
391 points[2*NPHI+2+2*i+0][0] = pRMin.getValue()*FCOS(phi);
392 points[2*NPHI+2+2*i+0][1] = pRMin.getValue()*FSIN(phi);
393 points[2*NPHI+2+2*i+0][2] = +pDz.getValue();
394 points[2*NPHI+2+2*i+1][0] = pRMin.getValue()*FCOS(phi);
395 points[2*NPHI+2+2*i+1][1] = pRMin.getValue()*FSIN(phi);
396 points[2*NPHI+2+2*i+1][2] = -pDz.getValue();
397 pp = phi-DeltaPhi/2.0;
398 if (i!=NPHI) {
399 normals[NPHI+i][0] = -FCOS(pp);
400 normals[NPHI+i][1] = -FSIN(pp);
401 normals[NPHI+i][2] = 0;
402 }
403 phi-=DeltaPhi;
404 }
405 // The top side
406 for (i=0;i<NPHI;i++) {
407 normals[2*NPHI+i][0]=normals[2*NPHI+i][1]=0;
408 normals[2*NPHI+i][2]= 1.0;
409 }
410 // The bottom side
411 for (i=0;i<NPHI;i++) {
412 normals[3*NPHI+i][0]=normals[3*NPHI+i][1]=0;
413 normals[3*NPHI+i][2]= -1.0;
414 }
415 // The odd side
416 phi = pSPhi.getValue();
417 normals[4*NPHI+0][0]= FSIN(phi);
418 normals[4*NPHI+0][1]= -FCOS(phi);
419 normals[4*NPHI+0][2]=0;
420
421 // Another odd side
422 phi = pSPhi.getValue()+pDPhi.getValue();
423 normals[4*NPHI+1][0]= -FSIN(phi);
424 normals[4*NPHI+1][1]= +FCOS(phi);
425 normals[4*NPHI+1][2]=0;
426
427 for (int np=0;np<NPOINTS; np++) theCoordinates->point.set1Value(np,points[np][0],points[np][1],points[np][2]);
428 for (int ni=0;ni<NINDICES;ni++) theFaceSet->coordIndex.set1Value(ni,indices[ni]);
429 for (int nf=0;nf<NFACES;nf++) theNormals->vector.set1Value(nf,normals[nf][0],normals[nf][1],normals[nf][2]);
430 theNormalBinding->value=SoNormalBinding::PER_FACE;
431}
432
433// generateChildren
434void SoTubs::generateChildren() {
435
436 // This routines creates one SoSeparator, one SoCoordinate3, and
437 // one SoLineSet, and puts it in the child list. This is done only
438 // once, whereas redrawing the position of the coordinates occurs each
439 // time an update is necessary, in the updateChildren routine.
440
441 assert(children->getLength() ==0);
442 SoSeparator *sep = new SoSeparator();
443 SoCoordinate3 *theCoordinates = new SoCoordinate3();
444 SoNormal *theNormals = new SoNormal();
445 SoNormalBinding *theNormalBinding = new SoNormalBinding();
446 SoIndexedFaceSet *theFaceSet = new SoIndexedFaceSet();
447 //
448 // This line costs some in render quality! but gives speed.
449 //
450 sep->addChild(theCoordinates);
451 sep->addChild(theNormals);
452 sep->addChild(theNormalBinding);
453 sep->addChild(theFaceSet);
454 children->append(sep);
455}
456
457// generateAlternateRep
458void SoTubs::generateAlternateRep() {
459
460 // This routine sets the alternate representation to the child
461 // list of this mode.
462
463 if (children->getLength() == 0) generateChildren();
464 updateChildren();
465 alternateRep.setValue((SoSeparator *) ( *children)[0]);
466}
467
468// clearAlternateRep
469void SoTubs::clearAlternateRep() {
470 alternateRep.setValue(NULL);
471}
FCOS
#define FCOS(x)
Definition: SbMath.h:40
FSIN
#define FSIN(x)
Definition: SbMath.h:41
M_PI
#define M_PI
Definition: SbMath.h:33
GEN_VERTEX
#define GEN_VERTEX(pv, x, y, z, s, t, nx, ny, nz)
SoTubs
Definition: SoTubs.h:71
SoTubs::getChildren
virtual SoChildList * getChildren() const
GetChildList, required whenever the class has hidden children.
Definition: SoTubs.cc:250
SoTubs::~SoTubs
virtual ~SoTubs()
Destructor, required.
Definition: SoTubs.cc:78
SoTubs::computeBBox
virtual void computeBBox(SoAction *action, SbBox3f &box, SbVec3f &center)
compute bounding Box, required
Definition: SoTubs.cc:256
SoTubs::pDz
SoSFFloat pDz
Half-length in Z.
Definition: SoTubs.h:89
SoTubs::clearAlternateRep
virtual void clearAlternateRep()
We better be able to clear it, too!
Definition: SoTubs.cc:469
SoTubs::alternateRep
SoSFNode alternateRep
Alternate rep - required.
Definition: SoTubs.h:101
SoTubs::generatePrimitives
virtual void generatePrimitives(SoAction *action)
Generate Primitives, required.
Definition: SoTubs.cc:94
SoTubs::pDPhi
SoSFFloat pDPhi
Delta-angle, in radians.
Definition: SoTubs.h:97
SoTubs::generateAlternateRep
virtual void generateAlternateRep()
Definition: SoTubs.cc:458
SoTubs::pSPhi
SoSFFloat pSPhi
Starting angle, in radians.
Definition: SoTubs.h:93
SoTubs::initClass
static void initClass()
Class Initializer, required.
Definition: SoTubs.cc:84
SoTubs::pRMin
SoSFFloat pRMin
Inside radius of the tube.
Definition: SoTubs.h:81
SoTubs::pRMax
SoSFFloat pRMax
Outside radius of the tube.
Definition: SoTubs.h:85