Geant4 9.6.0
Toolkit for the simulation of the passage of particles through matter
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SoTubs.cc
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28// $Id$
29//
30/*-----------------------------HEPVis---------------------------------------*/
31/* */
32/* Node: SoTubs */
33/* Description: Represents the G4Tubs Geant Geometry entity */
34/* Author: Joe Boudreau Nov 11 1996 */
35/* */
36/*--------------------------------------------------------------------------*/
37
38#ifdef G4VIS_BUILD_OI_DRIVER
39
40// this :
41#include "HEPVis/nodes/SoTubs.h"
42
43#include <assert.h>
44#include <cmath>
45
46#include <Inventor/SbBox.h>
47#include <Inventor/actions/SoGLRenderAction.h>
48#include <Inventor/fields/SoSFFloat.h>
49#include <Inventor/misc/SoChildList.h>
50#include <Inventor/nodes/SoSeparator.h>
51#include <Inventor/nodes/SoIndexedFaceSet.h>
52#include <Inventor/nodes/SoNormal.h>
53#include <Inventor/nodes/SoCoordinate3.h>
54#include <Inventor/nodes/SoNormalBinding.h>
55#include <Inventor/SoPrimitiveVertex.h>
56#include <Inventor/elements/SoTextureCoordinateElement.h>
57
58#include "HEPVis/SbMath.h"
59
60// This statement is required
61SO_NODE_SOURCE(SoTubs)
62
63// Constructor
64SoTubs::SoTubs() {
65
66
67 // This statement is required
68 SO_NODE_CONSTRUCTOR(SoTubs);
69
70 // Data fields are initialized like this:
71 SO_NODE_ADD_FIELD(pRMin, (0));
72 SO_NODE_ADD_FIELD(pRMax, (1));
73 SO_NODE_ADD_FIELD(pDz, (10));
74 SO_NODE_ADD_FIELD(pSPhi, (0));
75 SO_NODE_ADD_FIELD(pDPhi, ((float)(2*M_PI)));
76 SO_NODE_ADD_FIELD(alternateRep, (NULL));
77 children = new SoChildList(this);
78}
79
80// Destructor
81SoTubs::~SoTubs() {
82 delete children;
83}
84
85
86// initClass
87void SoTubs::initClass(){
88 // This statement is required.
89 SO_NODE_INIT_CLASS(SoTubs,SoShape,"Shape");
90}
91
92// generatePrimitives
93void SoTubs::generatePrimitives(SoAction *action) {
94 // This variable is used to store each vertex
95 SoPrimitiveVertex pv;
96
97 // Access the stat from the action
98 SoState *state = action->getState();
99
100 // See if we have to use a texture coordinate function,
101 // rather than generating explicit texture coordinates.
102 SbBool useTexFunction=
103 (SoTextureCoordinateElement::getType(state) ==
104 SoTextureCoordinateElement::FUNCTION);
105
106 // If we need to generate texture coordinates with a function,
107 // we'll need an SoGLTextureCoordinateElement. Otherwise, we'll
108 // set up the coordinates directly.
109 const SoTextureCoordinateElement* tce = NULL;
110 SbVec4f texCoord;
111 if (useTexFunction) {
112 tce = SoTextureCoordinateElement::getInstance(state);
113 }
114 else {
115 texCoord[2] = 0.0;
116 texCoord[3] = 1.0;
117 }
118 SbVec3f point, normal;
119
120
121 ///////////////////////////////////////////////////////
122 //-----------------------------------------------------
123#define GEN_VERTEX(pv,x,y,z,s,t,nx,ny,nz) \
124 point.setValue((float)(x),(float)(y),(float)(z)); \
125 normal.setValue((float)(nx),(float)(ny),(float)(nz)); \
126 if (useTexFunction) { \
127 texCoord=tce->get(point,normal); \
128 } else { \
129 texCoord[0]=(float)(s); \
130 texCoord[1]=(float)(t); \
131 } \
132 pv.setPoint(point); \
133 pv.setNormal(normal); \
134 pv.setTextureCoords(texCoord); \
135 shapeVertex(&pv);
136 //-----------------------------------------------------
137 ///////////////////////////////////////////////////////
138
139 int NPHI = (int)(2+22*std::fabs(pDPhi.getValue()/(2.0*M_PI)));
140 double deltaPhi = pDPhi.getValue()/NPHI, phi0 = pSPhi.getValue(),phi1=phi0+pDPhi.getValue();
141 double rMax=pRMax.getValue(),rMin=pRMin.getValue();
142 double zMax=pDz.getValue(),zMin=-zMax;
143 double cosPhi0=std::cos(phi0), sinPhi0=std::sin(phi0);
144 double cosPhi1=std::cos(phi1), sinPhi1=std::sin(phi1);
145 double cosDeltaPhi=std::cos(deltaPhi),sinDeltaPhi=std::sin(deltaPhi);
146 //
147 // The outer surface!
148 //
149 int i;
150 double sinPhi,cosPhi;
151 beginShape(action,TRIANGLE_STRIP);
152 sinPhi=sinPhi0;
153 cosPhi=cosPhi0;
154 for (i = 0; i<=NPHI; i++) {
155 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMax,0.0,0.0,cosPhi,sinPhi,0);
156 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMin,1.0,1.0,cosPhi,sinPhi,0);
157 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
158 }
159 endShape();
160 //
161 // The inner surface!
162 //
163 if(rMin!=0.F) {
164 beginShape(action,TRIANGLE_STRIP);
165 sinPhi=sinPhi0;
166 cosPhi=cosPhi0;
167 for (i = 0; i<=NPHI; i++) {
168 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMax,0.0,0.0,-cosPhi,-sinPhi,0);
169 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMin,1.0,1.0,-cosPhi,-sinPhi,0);
170 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
171 }
172 endShape();
173 }
174 if (std::fabs(deltaPhi)<2.0*M_PI) {
175 //
176 // The end
177 //
178 beginShape(action,TRIANGLE_STRIP);
179 sinPhi=sinPhi0;
180 cosPhi=cosPhi0;
181 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMax,0.0,0.0,sinPhi,-cosPhi,0);
182 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMin,1.0,1.0,sinPhi,-cosPhi,0);
183 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMax,1.0,0.0,sinPhi,-cosPhi,0);
184 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMin,0.0,1.0,sinPhi,-cosPhi,0);
185 endShape();
186 //
187 // The other end
188 //
189 beginShape(action,TRIANGLE_STRIP);
190 sinPhi=sinPhi1;
191 cosPhi=cosPhi1;
192 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi, zMax,0.0,0.0,-sinPhi,+cosPhi,0);
193 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi, zMin,1.0,1.0,-sinPhi,+cosPhi,0);
194 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi, zMax,1.0,0.0,-sinPhi,+cosPhi,0);
195 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi, zMin,0.0,1.0,-sinPhi,+cosPhi,0);
196 endShape();
197 }
198 //
199 // The outer surface at z=+PDZ
200 //
201 if(rMin==0.F) {
202 beginShape(action,TRIANGLE_FAN);
203 sinPhi=sinPhi0;
204 cosPhi=cosPhi0;
205 GEN_VERTEX(pv,0,0,zMax,0.0,0.0,0,0,1);
206 for (i = 0; i<=NPHI; i++) {
207 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMax,1.0,1.0,0,0,1);
208 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
209 }
210 endShape();
211 //
212 // The outer surface at z=-PDZ
213 //
214 beginShape(action,TRIANGLE_FAN);
215 sinPhi=sinPhi0;
216 cosPhi=cosPhi0;
217 GEN_VERTEX(pv,0,0,zMin,0.0,0.0,0,0,-1);
218 for (i = 0; i<=NPHI; i++) {
219 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMin,1.0,1.0,0,0,-1);
220 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
221 }
222 endShape();
223 } else {
224 beginShape(action,TRIANGLE_STRIP);
225 sinPhi=sinPhi0;
226 cosPhi=cosPhi0;
227 for (i = 0; i<=NPHI; i++) {
228 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMax,0.0,0.0,0,0,1);
229 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMax,1.0,1.0,0,0,1);
230 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
231 }
232 endShape();
233 //
234 // The outer surface at z=-PDZ
235 //
236 beginShape(action,TRIANGLE_STRIP);
237 sinPhi=sinPhi0;
238 cosPhi=cosPhi0;
239 for (i = 0; i<=NPHI; i++) {
240 GEN_VERTEX(pv,rMin*cosPhi,rMin*sinPhi,zMin,0.0,0.0,0,0,-1);
241 GEN_VERTEX(pv,rMax*cosPhi,rMax*sinPhi,zMin,1.0,1.0,0,0,-1);
242 inc(sinPhi, cosPhi, sinDeltaPhi, cosDeltaPhi);
243 }
244 endShape();
245 }
246}
247
248// getChildren
249SoChildList *SoTubs::getChildren() const {
250 return children;
251}
252
253
254// computeBBox
255void SoTubs::computeBBox(SoAction *, SbBox3f &box, SbVec3f &center ){
256 SbVec3f vmin(-pRMax.getValue(),-pRMax.getValue(),-pDz.getValue()),
257 vmax( pRMax.getValue(), pRMax.getValue(), pDz.getValue());
258 center.setValue(0,0,0);
259 box.setBounds(vmin,vmax);
260}
261
262
263// updateChildren
264void SoTubs::updateChildren() {
265
266 // Redraw the G4Tubs....
267
268 assert(children->getLength()==1);
269 SoSeparator *sep = (SoSeparator *) ( *children)[0];
270 SoCoordinate3 *theCoordinates = (SoCoordinate3 *) ( sep->getChild(0));
271 SoNormal *theNormals = (SoNormal *) ( sep->getChild(1));
272 SoNormalBinding *theNormalBinding = (SoNormalBinding *) ( sep->getChild(2));
273 SoIndexedFaceSet *theFaceSet = (SoIndexedFaceSet *) ( sep->getChild(3));
274
275
276 const int NPHI=24, NPOINTS=2*(2*NPHI+2), NFACES=4*NPHI+2, NINDICES = NFACES*5;
277 float points[NPOINTS][3],normals[NFACES][3];
278#ifdef INVENTOR2_0
279 static long indices[NINDICES];
280#else
281 static int32_t indices[NINDICES];
282#endif
283
284 static int init=0;
285 double phi, pp, DeltaPhi;
286
287 // Indices need to be generated once! This is here to keep it close to the point
288 // generation, since otherwise it will be confusing.
289
290 int i;
291 if (!init) {
292 init = 1;
293 // Outer face
294 for (i = 0; i< NPHI; i++) {
295 // 0 1 3 2;
296 indices[5*i+0] = 2*i+0;
297 indices[5*i+1] = 2*i+1;
298 indices[5*i+2] = 2*i+3;
299 indices[5*i+3] = 2*i+2;
300 indices[5*i+4] = SO_END_FACE_INDEX;
301 }
302 // the inner face
303 for (i=0;i<NPHI;i++) {
304 indices[5*1*NPHI + 5*i+0] = 2*NPHI+2 + 2*i+0;
305 indices[5*1*NPHI + 5*i+1] = 2*NPHI+2 + 2*i+1;
306 indices[5*1*NPHI + 5*i+2] = 2*NPHI+2 + 2*i+3;
307 indices[5*1*NPHI + 5*i+3] = 2*NPHI+2 + 2*i+2;
308 indices[5*1*NPHI + 5*i+4] = SO_END_FACE_INDEX;
309 }
310 // the top side
311 for (i=0;i<NPHI;i++) {
312 indices[5*2*NPHI + 5*i+0] = 2*i+0;
313 indices[5*2*NPHI + 5*i+1] = 2*i+2;
314 indices[5*2*NPHI + 5*i+2] = NPOINTS - (2*i+4);
315 indices[5*2*NPHI + 5*i+3] = NPOINTS - (2*i+2);
316 indices[5*2*NPHI + 5*i+4] = SO_END_FACE_INDEX;
317 }
318 // the bottom side
319 for (i=0;i<NPHI;i++) {
320 indices[5*3*NPHI + 5*i+0] = 2*i+1;
321 indices[5*3*NPHI + 5*i+1] = NPOINTS - (2*i+1);
322 indices[5*3*NPHI + 5*i+2] = NPOINTS - (2*i+3);
323 indices[5*3*NPHI + 5*i+3] = 2*i+3;
324 indices[5*3*NPHI + 5*i+4] = SO_END_FACE_INDEX;
325 }
326 // the odd side
327 indices[5*4*NPHI +0] = 2*NPHI;
328 indices[5*4*NPHI +1] = 2*NPHI+1;
329 indices[5*4*NPHI +2] = 2*NPHI+3;
330 indices[5*4*NPHI +3] = 2*NPHI+2;
331 indices[5*4*NPHI +4] = SO_END_FACE_INDEX;
332 // aother odd side
333 indices[5*4*NPHI +5 +0] = 0;
334 indices[5*4*NPHI +5 +1] = NPOINTS-2;
335 indices[5*4*NPHI +5 +2] = NPOINTS-1;
336 indices[5*4*NPHI +5 +3] = 1;
337 indices[5*4*NPHI +5 +4] = SO_END_FACE_INDEX;
338 }
339 // Points need to be generated each time:
340 if (pDPhi.getValue()<2*M_PI) {
341 // the odd side
342 indices[5*4*NPHI +0] = 2*NPHI;
343 indices[5*4*NPHI +1] = 2*NPHI+1;
344 indices[5*4*NPHI +2] = 2*NPHI+3;
345 indices[5*4*NPHI +3] = 2*NPHI+2;
346 indices[5*4*NPHI +4] = SO_END_FACE_INDEX;
347 // aother odd side
348 indices[5*4*NPHI +5 +0] = 0;
349 indices[5*4*NPHI +5 +1] = NPOINTS-2;
350 indices[5*4*NPHI +5 +2] = NPOINTS-1;
351 indices[5*4*NPHI +5 +3] = 1;
352 indices[5*4*NPHI +5 +4] = SO_END_FACE_INDEX;
353 }
354 else {
355 // the odd side
356 indices[5*4*NPHI +0] = SO_END_FACE_INDEX;
357 indices[5*4*NPHI +1] = SO_END_FACE_INDEX;
358 indices[5*4*NPHI +2] = SO_END_FACE_INDEX;
359 indices[5*4*NPHI +3] = SO_END_FACE_INDEX;
360 indices[5*4*NPHI +4] = SO_END_FACE_INDEX;
361 // aother odd side
362 indices[5*4*NPHI +5 +0] = SO_END_FACE_INDEX;
363 indices[5*4*NPHI +5 +1] = SO_END_FACE_INDEX;
364 indices[5*4*NPHI +5 +2] = SO_END_FACE_INDEX;
365 indices[5*4*NPHI +5 +3] = SO_END_FACE_INDEX;
366 indices[5*4*NPHI +5 +4] = SO_END_FACE_INDEX;
367 }
368 // The outer surface
369 DeltaPhi = pDPhi.getValue()/NPHI, phi = pSPhi.getValue();
370 for (i = 0; i<=NPHI; i++) {
371 points[2*i+0][0] = pRMax.getValue()*FCOS(phi);
372 points[2*i+0][1]= pRMax.getValue()*FSIN(phi);
373 points[2*i+0][2] = +pDz.getValue();
374
375 points[2*i+1][0] = pRMax.getValue()*FCOS(phi);
376 points[2*i+1][1]= pRMax.getValue()*FSIN(phi);
377 points[2*i+1][2] = -pDz.getValue();
378
379 pp = phi+DeltaPhi/2.0;
380 if (i!=NPHI) {
381 normals[i][0] = FCOS(pp);
382 normals[i][1] = FSIN(pp);
383 normals[i][2] = 0;
384 }
385 phi+=DeltaPhi;
386 }
387 // The inner surface
388 phi = pSPhi.getValue() + pDPhi.getValue();
389 for (i = 0; i<=NPHI; i++) {
390 points[2*NPHI+2+2*i+0][0] = pRMin.getValue()*FCOS(phi);
391 points[2*NPHI+2+2*i+0][1] = pRMin.getValue()*FSIN(phi);
392 points[2*NPHI+2+2*i+0][2] = +pDz.getValue();
393 points[2*NPHI+2+2*i+1][0] = pRMin.getValue()*FCOS(phi);
394 points[2*NPHI+2+2*i+1][1] = pRMin.getValue()*FSIN(phi);
395 points[2*NPHI+2+2*i+1][2] = -pDz.getValue();
396 pp = phi-DeltaPhi/2.0;
397 if (i!=NPHI) {
398 normals[NPHI+i][0] = -FCOS(pp);
399 normals[NPHI+i][1] = -FSIN(pp);
400 normals[NPHI+i][2] = 0;
401 }
402 phi-=DeltaPhi;
403 }
404 // The top side
405 for (i=0;i<NPHI;i++) {
406 normals[2*NPHI+i][0]=normals[2*NPHI+i][1]=0;
407 normals[2*NPHI+i][2]= 1.0;
408 }
409 // The bottom side
410 for (i=0;i<NPHI;i++) {
411 normals[3*NPHI+i][0]=normals[3*NPHI+i][1]=0;
412 normals[3*NPHI+i][2]= -1.0;
413 }
414 // The odd side
415 phi = pSPhi.getValue();
416 normals[4*NPHI+0][0]= FSIN(phi);
417 normals[4*NPHI+0][1]= -FCOS(phi);
418 normals[4*NPHI+0][2]=0;
419
420 // Another odd side
421 phi = pSPhi.getValue()+pDPhi.getValue();
422 normals[4*NPHI+1][0]= -FSIN(phi);
423 normals[4*NPHI+1][1]= +FCOS(phi);
424 normals[4*NPHI+1][2]=0;
425
426 for (int np=0;np<NPOINTS; np++) theCoordinates->point.set1Value(np,points[np][0],points[np][1],points[np][2]);
427 for (int ni=0;ni<NINDICES;ni++) theFaceSet->coordIndex.set1Value(ni,indices[ni]);
428 for (int nf=0;nf<NFACES;nf++) theNormals->vector.set1Value(nf,normals[nf][0],normals[nf][1],normals[nf][2]);
429 theNormalBinding->value=SoNormalBinding::PER_FACE;
430}
431
432// generateChildren
433void SoTubs::generateChildren() {
434
435 // This routines creates one SoSeparator, one SoCoordinate3, and
436 // one SoLineSet, and puts it in the child list. This is done only
437 // once, whereas redrawing the position of the coordinates occurs each
438 // time an update is necessary, in the updateChildren routine.
439
440 assert(children->getLength() ==0);
441 SoSeparator *sep = new SoSeparator();
442 SoCoordinate3 *theCoordinates = new SoCoordinate3();
443 SoNormal *theNormals = new SoNormal();
444 SoNormalBinding *theNormalBinding = new SoNormalBinding();
445 SoIndexedFaceSet *theFaceSet = new SoIndexedFaceSet();
446 //
447 // This line costs some in render quality! but gives speed.
448 //
449 sep->addChild(theCoordinates);
450 sep->addChild(theNormals);
451 sep->addChild(theNormalBinding);
452 sep->addChild(theFaceSet);
453 children->append(sep);
454}
455
456// generateAlternateRep
457void SoTubs::generateAlternateRep() {
458
459 // This routine sets the alternate representation to the child
460 // list of this mode.
461
462 if (children->getLength() == 0) generateChildren();
463 updateChildren();
464 alternateRep.setValue((SoSeparator *) ( *children)[0]);
465}
466
467// clearAlternateRep
468void SoTubs::clearAlternateRep() {
469 alternateRep.setValue(NULL);
470}
471
472#endif
FCOS
#define FCOS(x)
Definition: SbMath.h:41
FSIN
#define FSIN(x)
Definition: SbMath.h:42
M_PI
#define M_PI
Definition: SbMath.h:34
SoTubs
Definition: SoTubs.h:72
SoTubs::~SoTubs
virtual ~SoTubs()
Destructor, required.
SoTubs::getChildren
virtual SoChildList * getChildren() const
GetChildList, required whenever the class has hidden children.
SoTubs::computeBBox
virtual void computeBBox(SoAction *action, SbBox3f &box, SbVec3f &center)
compute bounding Box, required
SoTubs::generateAlternateRep
virtual void generateAlternateRep()
SoTubs::pDz
SoSFFloat pDz
Half-length in Z.
Definition: SoTubs.h:90
SoTubs::alternateRep
SoSFNode alternateRep
Alternate rep - required.
Definition: SoTubs.h:102
SoTubs::generatePrimitives
virtual void generatePrimitives(SoAction *action)
Generate Primitives, required.
SoTubs::initClass
static void initClass()
Class Initializer, required.
SoTubs::clearAlternateRep
virtual void clearAlternateRep()
We better be able to clear it, too!
SoTubs::pDPhi
SoSFFloat pDPhi
Delta-angle, in radians.
Definition: SoTubs.h:98
SoTubs::pSPhi
SoSFFloat pSPhi
Starting angle, in radians.
Definition: SoTubs.h:94
SoTubs::SoTubs
SoTubs()
Constructor, required.
SoTubs::pRMin
SoSFFloat pRMin
Inside radius of the tube.
Definition: SoTubs.h:82
SoTubs::pRMax
SoSFFloat pRMax
Outside radius of the tube.
Definition: SoTubs.h:86