Geant4 9.6.0
Toolkit for the simulation of the passage of particles through matter
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SoTrap.cc
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28// $Id$
29//
30/*-----------------------------HEPVis----------------------------------------*/
31/* */
32/* Node: SoTrap */
33/* Description: Represents the G4Trap Geant Geometry entity */
34/* Author: Joe Boudreau Nov 11 1996 */
35/* */
36/* */
37/*---------------------------------------------------------------------------*/
38
39#ifdef G4VIS_BUILD_OI_DRIVER
40
41// this :
42#include "HEPVis/nodes/SoTrap.h"
43
44#include <assert.h>
45#include <cmath>
46#include <Inventor/SbBox.h>
47#include <Inventor/actions/SoGLRenderAction.h>
48#include <Inventor/actions/SoAction.h>
49#include <Inventor/fields/SoSFFloat.h>
50#include <Inventor/misc/SoChildList.h>
51#include <Inventor/nodes/SoSeparator.h>
52#include <Inventor/nodes/SoIndexedFaceSet.h>
53#include <Inventor/nodes/SoNormal.h>
54#include <Inventor/nodes/SoCoordinate3.h>
55#include <Inventor/nodes/SoNormalBinding.h>
56#include <Inventor/SoPrimitiveVertex.h>
57#include <Inventor/elements/SoTextureCoordinateElement.h>
58
59#include "HEPVis/SbMath.h"
60
61// This statement is required
62SO_NODE_SOURCE(SoTrap)
63
64// Constructor
65SoTrap::SoTrap() {
66 // This statement is required
67 SO_NODE_CONSTRUCTOR(SoTrap);
68
69 // Data fields are initialized like this:
70 SO_NODE_ADD_FIELD(pDz, (1.0));
71 SO_NODE_ADD_FIELD(pTheta, (0.0));
72 SO_NODE_ADD_FIELD(pPhi, (0.0));
73 SO_NODE_ADD_FIELD(pDy1, (1.0));
74 SO_NODE_ADD_FIELD(pDx1, (1.0));
75 SO_NODE_ADD_FIELD(pDx2, (1.0));
76 SO_NODE_ADD_FIELD(pDy2, (1.0));
77 SO_NODE_ADD_FIELD(pDx3, (1.0));
78 SO_NODE_ADD_FIELD(pDx4, (1.0));
79 SO_NODE_ADD_FIELD(pAlp1, (0.0));
80 SO_NODE_ADD_FIELD(pAlp2, (0.0));
81 SO_NODE_ADD_FIELD(alternateRep, (NULL));
82 children = new SoChildList(this);
83}
84
85// Destructor
86SoTrap::~SoTrap() {
87 delete children;
88}
89
90
91// initClass
92void SoTrap::initClass(){
93 // This statement is required.
94 SO_NODE_INIT_CLASS(SoTrap,SoShape,"Shape");
95}
96
97
98// generatePrimitives
99void SoTrap::generatePrimitives(SoAction *action) {
100 // This variable is used to store each vertex
101 SoPrimitiveVertex pv;
102
103 // Access the stat from the action
104 SoState *state = action->getState();
105
106 // See if we have to use a texture coordinate function,
107 // rather than generating explicit texture coordinates.
108 SbBool useTexFunction=
109 (SoTextureCoordinateElement::getType(state) ==
110 SoTextureCoordinateElement::FUNCTION);
111
112 // If we need to generate texture coordinates with a function,
113 // we'll need an SoGLTextureCoordinateElement. Otherwise, we'll
114 // set up the coordinates directly.
115 const SoTextureCoordinateElement *tce = NULL;
116 SbVec4f texCoord;
117 if (useTexFunction) {
118 tce = SoTextureCoordinateElement::getInstance(state);
119 }
120 else {
121 texCoord[2] = 0.0;
122 texCoord[3] = 1.0;
123 }
124 SbVec3f point, normal;
125
126
127 //////////////////////////////////////////
128 //----------------------------------------
129#define GEN_VERTEX(pv,x,y,z,s,t,nx,ny,nz) \
130 point.setValue(x,y,z); \
131 normal.setValue(nx,ny,nz); \
132 if (useTexFunction) { \
133 texCoord=tce->get(point,normal); \
134 } \
135 else { \
136 texCoord[0]=s; \
137 texCoord[1]=t; \
138 } \
139 pv.setPoint(point); \
140 pv.setNormal(normal); \
141 pv.setTextureCoords(texCoord); \
142 shapeVertex(&pv);
143 //----------------------------------------
144 //////////////////////////////////////////
145
146 const int NPOINTS=8, NFACES=6, NINDICES = NFACES*5;
147 int indices[NINDICES] = {3,2,1,0, SO_END_FACE_INDEX, //z back.
148 4,5,6,7, SO_END_FACE_INDEX, //z front.
149 0,1,5,4, SO_END_FACE_INDEX, //y up.
150 1,2,6,5, SO_END_FACE_INDEX, //x left.
151 2,3,7,6, SO_END_FACE_INDEX, //y down.
152 3,0,4,7, SO_END_FACE_INDEX}; //x right.
153
154 // points for the eight vertices
155 float TthetaCphi = FTAN(pTheta.getValue())*FCOS(pPhi.getValue());
156 float TthetaSphi = FTAN(pTheta.getValue())*FSIN(pPhi.getValue());
157 float Talp1 = FTAN(pAlp1.getValue());
158 float Talp2 = FTAN(pAlp2.getValue());
159
160 float points[NPOINTS][3];
161 points[0][0] = pDx2.getValue()+pDy1.getValue()*Talp1;
162 points[0][1] = pDy1.getValue();
163 points[0][2] = -pDz.getValue();
164
165 points[1][0] = -pDx2.getValue()+pDy1.getValue()*Talp1;
166 points[1][1] = pDy1.getValue();
167 points[1][2] = -pDz.getValue();
168
169 points[2][0] = -pDx1.getValue()-pDy1.getValue()*Talp1;
170 points[2][1] = -pDy1.getValue();
171 points[2][2] = -pDz.getValue();
172
173 points[3][0] = pDx1.getValue()-pDy1.getValue()*Talp1;
174 points[3][1] = -pDy1.getValue();
175 points[3][2] = -pDz.getValue();
176
177 points[4][0] = pDx4.getValue()+pDy2.getValue()*Talp2;
178 points[4][1] = pDy2.getValue();
179 points[4][2] = pDz.getValue();
180
181 points[5][0] = -pDx4.getValue()+pDy2.getValue()*Talp2;
182 points[5][1] = pDy2.getValue();
183 points[5][2] = pDz.getValue();
184
185 points[6][0] = -pDx3.getValue()-pDy2.getValue()*Talp2;
186 points[6][1] = -pDy2.getValue();
187 points[6][2] = pDz.getValue();
188
189 points[7][0] = pDx3.getValue()-pDy2.getValue()*Talp2;
190 points[7][1] = -pDy2.getValue();
191 points[7][2] = pDz.getValue();
192
193 int i;
194 for (i=0;i<4;i++) {
195 points[i][0] -= pDz.getValue()*TthetaCphi;
196 points[i][1] -= pDz.getValue()*TthetaSphi;
197 }
198 for (i=4;i<8;i++) {
199 points[i][0] += pDz.getValue()*TthetaCphi;
200 points[i][1] += pDz.getValue()*TthetaSphi;
201 }
202
203 SbVec3f normals[NFACES];
204 int nf;
205 for (nf=0;nf<NFACES;nf++) {
206 int j0 = indices[5*nf + 0];
207 int j1 = indices[5*nf + 1];
208 int j2 = indices[5*nf + 2];
209 SbVec3f p0(points[j0][0],points[j0][1],points[j0][2]);
210 SbVec3f p1(points[j1][0],points[j1][1],points[j1][2]);
211 SbVec3f p2(points[j2][0],points[j2][1],points[j2][2]);
212 normals[nf] = (p1-p0).cross(p2-p0);
213 normals[nf].normalize();
214 }
215
216 float x,y,z;
217 int index;
218 for (nf=0;nf<NFACES;nf++) {
219 beginShape(action,TRIANGLE_FAN);
220 index = indices[nf * 5];
221 x = points[index][0];
222 y = points[index][1];
223 z = points[index][2];
224 GEN_VERTEX(pv,x,y,z,0.0,0.0,normals[nf][0],normals[nf][1],normals[nf][2]);
225 index = indices[nf * 5 + 1];
226 x = points[index][0];
227 y = points[index][1];
228 z = points[index][2];
229 GEN_VERTEX(pv,x,y,z,0.0,0.0,normals[nf][0],normals[nf][1],normals[nf][2]);
230 index = indices[nf * 5 + 2];
231 x = points[index][0];
232 y = points[index][1];
233 z = points[index][2];
234 GEN_VERTEX(pv,x,y,z,0.0,0.0,normals[nf][0],normals[nf][1],normals[nf][2]);
235 index = indices[nf * 5 + 3];
236 x = points[index][0];
237 y = points[index][1];
238 z = points[index][2];
239 GEN_VERTEX(pv,x,y,z,0.0,0.0,normals[nf][0],normals[nf][1],normals[nf][2]);
240 endShape();
241 }
242}
243
244// getChildren
245SoChildList *SoTrap::getChildren() const {
246 return children;
247}
248
249
250// computeBBox
251void SoTrap::computeBBox(SoAction *, SbBox3f &box, SbVec3f &center ){
252 float pDx= pDx1.getValue(),pDy=pDy1.getValue();
253
254 if (pDx2.getValue() > pDx) pDx = pDx2.getValue();
255 if (pDx3.getValue() > pDx) pDx = pDx3.getValue();
256 if (pDx4.getValue() > pDx) pDx = pDx4.getValue();
257 if (pDy2.getValue() > pDy) pDy = pDy2.getValue();
258 float TthetaCphi = FTAN(pTheta.getValue())*FCOS(pPhi.getValue());
259 float TthetaSphi = FTAN(pTheta.getValue())*FSIN(pPhi.getValue());
260 float Xalp = FFABS(std::tan(pAlp1.getValue())*pDy1.getValue());
261 float Xalp2 = FFABS(std::tan(pAlp2.getValue())*pDy2.getValue());
262 if (Xalp< Xalp2) Xalp=Xalp2;
263 pDx += FFABS(TthetaCphi*pDz.getValue());
264 pDx += Xalp;
265 pDy += FFABS(TthetaSphi*pDz.getValue());
266
267
268 center.setValue(0,0,0);
269 box.setBounds(SbVec3f(-pDx,-pDy,-pDz.getValue()),
270 SbVec3f( pDx, pDy, pDz.getValue()));
271}
272
273
274
275
276// updateChildren
277void SoTrap::updateChildren() {
278
279
280 // Redraw the G4Trap....
281
282 assert(children->getLength()==1);
283 SoSeparator *sep = (SoSeparator *) ( *children)[0];
284 SoCoordinate3 *theCoordinates = (SoCoordinate3 *) ( sep->getChild(0));
285 SoNormal *theNormals = (SoNormal *) ( sep->getChild(1));
286 SoNormalBinding *theNormalBinding = (SoNormalBinding *) ( sep->getChild(2));
287 SoIndexedFaceSet *theFaceSet = (SoIndexedFaceSet *) ( sep->getChild(3));
288
289 const int NPOINTS=8, NFACES=6, NINDICES = NFACES*5;
290 float points[NPOINTS][3];
291 // Indices for the eight faces
292#ifdef INVENTOR2_0
293 static long
294#else
295 static int32_t
296#endif
297 indices[NINDICES] = {3,2,1,0, SO_END_FACE_INDEX, // bottom
298 4,5,6,7, SO_END_FACE_INDEX, // top
299 0,1,5,4, SO_END_FACE_INDEX,
300 1,2,6,5, SO_END_FACE_INDEX,
301 2,3,7,6, SO_END_FACE_INDEX,
302 3,0,4,7, SO_END_FACE_INDEX};
303
304
305 // points for the eight vertices
306 float TthetaCphi = FTAN(pTheta.getValue())*FCOS(pPhi.getValue());
307 float TthetaSphi = FTAN(pTheta.getValue())*FSIN(pPhi.getValue());
308 float Talp1 = FTAN(pAlp1.getValue());
309 float Talp2 = FTAN(pAlp2.getValue());
310
311 points[0][0] = pDx2.getValue()+pDy1.getValue()*Talp1;
312 points[0][1] = pDy1.getValue();
313 points[0][2] = -pDz.getValue();
314
315 points[1][0] = -pDx2.getValue()+pDy1.getValue()*Talp1;
316 points[1][1] = pDy1.getValue();
317 points[1][2] = -pDz.getValue();
318
319 points[2][0] = -pDx1.getValue()-pDy1.getValue()*Talp1;
320 points[2][1] = -pDy1.getValue();
321 points[2][2] = -pDz.getValue();
322
323 points[3][0] = pDx1.getValue()-pDy1.getValue()*Talp1;
324 points[3][1] = -pDy1.getValue();
325 points[3][2] = -pDz.getValue();
326
327 points[4][0] = pDx4.getValue()+pDy2.getValue()*Talp2;
328 points[4][1] = pDy2.getValue();
329 points[4][2] = pDz.getValue();
330
331 points[5][0] = -pDx4.getValue()+pDy2.getValue()*Talp2;
332 points[5][1] = pDy2.getValue();
333 points[5][2] = pDz.getValue();
334
335 points[6][0] = -pDx3.getValue()-pDy2.getValue()*Talp2;
336 points[6][1] = -pDy2.getValue();
337 points[6][2] = pDz.getValue();
338
339 points[7][0] = pDx3.getValue()-pDy2.getValue()*Talp2;
340 points[7][1] = -pDy2.getValue();
341 points[7][2] = pDz.getValue();
342
343 int i;
344 for (i=0;i<4;i++) {
345 points[i][0] -= pDz.getValue()*TthetaCphi;
346 points[i][1] -= pDz.getValue()*TthetaSphi;
347 }
348 for (i=4;i<8;i++) {
349 points[i][0] += pDz.getValue()*TthetaCphi;
350 points[i][1] += pDz.getValue()*TthetaSphi;
351 }
352
353 for (int np=0;np<NPOINTS;np++) theCoordinates->point.set1Value(np,points[np][0],points[np][1],points[np][2]);
354 theFaceSet->coordIndex.setValues(0,NINDICES,indices);
355 theNormals->vector.deleteValues(0);
356 theNormals->vector.insertSpace(0,6);
357 for (int n=0;n<6;n++) {
358 int i0 = 5*n+0,i1=5*n+1,i2=5*n+2;
359 int j0 = theFaceSet->coordIndex[i0];
360 int j1 = theFaceSet->coordIndex[i1];
361 int j2 = theFaceSet->coordIndex[i2];
362 SbVec3f p0= theCoordinates->point[j0];
363 SbVec3f p1= theCoordinates->point[j1];
364 SbVec3f p2= theCoordinates->point[j2];
365 SbVec3f normal = (p1-p0).cross(p2-p0);
366 normal.normalize();
367 theNormals->vector.set1Value(n,normal);
368 }
369 theNormalBinding->value=SoNormalBinding::PER_FACE;
370}
371
372// generateChildren
373void SoTrap::generateChildren() {
374
375 // This routines creates one SoSeparator, one SoCoordinate3, and
376 // one SoLineSet, and puts it in the child list. This is done only
377 // once, whereas redrawing the position of the coordinates occurs each
378 // time an update is necessary, in the updateChildren routine.
379
380 assert(children->getLength() ==0);
381 SoSeparator *sep = new SoSeparator();
382 SoCoordinate3 *theCoordinates = new SoCoordinate3();
383 SoNormal *theNormals = new SoNormal();
384 SoNormalBinding *theNormalBinding = new SoNormalBinding();
385 SoIndexedFaceSet *theFaceSet = new SoIndexedFaceSet();
386 //
387 // This line costs some in render quality! but gives speed.
388 //
389 sep->addChild(theCoordinates);
390 sep->addChild(theNormals);
391 sep->addChild(theNormalBinding);
392 sep->addChild(theFaceSet);
393 children->append(sep);
394}
395
396// generateAlternateRep
397void SoTrap::generateAlternateRep() {
398
399 // This routine sets the alternate representation to the child
400 // list of this mode.
401
402 if (children->getLength() == 0) generateChildren();
403 updateChildren();
404 alternateRep.setValue((SoSeparator *) ( *children)[0]);
405}
406
407// clearAlternateRep
408void SoTrap::clearAlternateRep() {
409 alternateRep.setValue(NULL);
410}
411
412#endif
FFABS
#define FFABS(x)
Definition: SbMath.h:52
FCOS
#define FCOS(x)
Definition: SbMath.h:41
FSIN
#define FSIN(x)
Definition: SbMath.h:42
FTAN
#define FTAN(x)
Definition: SbMath.h:45
SoTrap
Definition: SoTrap.h:82
SoTrap::pDx2
SoSFFloat pDx2
Half-length along x of the side at y=+pDy1 of the face at -pDz.
Definition: SoTrap.h:119
SoTrap::pDz
SoSFFloat pDz
half-length along Z
Definition: SoTrap.h:98
SoTrap::pAlp2
SoSFFloat pAlp2
Definition: SoTrap.h:141
SoTrap::pDx4
SoSFFloat pDx4
Half-length along x of the side at y=+pDy2 of the face at +pDz.
Definition: SoTrap.h:131
SoTrap::pDy1
SoSFFloat pDy1
Half-length along y of the face at -pDz.
Definition: SoTrap.h:111
SoTrap::computeBBox
virtual void computeBBox(SoAction *action, SbBox3f &box, SbVec3f &center)
compute bounding Box, required
SoTrap::pAlp1
SoSFFloat pAlp1
Definition: SoTrap.h:136
SoTrap::initClass
static void initClass()
Class Initializer, required.
SoTrap::generatePrimitives
virtual void generatePrimitives(SoAction *action)
Generate Primitives, required.
SoTrap::SoTrap
SoTrap()
Constructor, required.
SoTrap::pTheta
SoSFFloat pTheta
Polar angle of the line joining the centres of the faces at -/+pDz.
Definition: SoTrap.h:102
SoTrap::pDx3
SoSFFloat pDx3
Half-length along x of the side at y=-pDy2 of the face at +pDz.
Definition: SoTrap.h:127
SoTrap::getChildren
virtual SoChildList * getChildren() const
GetChildList, required whenever the class has hidden children.
SoTrap::pDx1
SoSFFloat pDx1
Half-length along x of the side at y=-pDy1 of the face at -pDz.
Definition: SoTrap.h:115
SoTrap::~SoTrap
virtual ~SoTrap()
Destructor, required.
SoTrap::clearAlternateRep
virtual void clearAlternateRep()
We better be able to clear it, too!
SoTrap::pPhi
SoSFFloat pPhi
Definition: SoTrap.h:107
SoTrap::generateAlternateRep
virtual void generateAlternateRep()
SoTrap::pDy2
SoSFFloat pDy2
Half-length along y of the face at +pDz.
Definition: SoTrap.h:123
SoTrap::alternateRep
SoSFNode alternateRep
Alternate rep - required.
Definition: SoTrap.h:146