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source: trunk/source/visualization/OpenGL/src/G4OpenGLSceneHandler.cc @ 1036

Last change on this file since 1036 was 1036, checked in by garnier, 15 years ago
pas de modif, juste du test
Property svn:mime-type set to `text/cpp`
File size: 26.5 KB

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1	//
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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. *
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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 *
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25	//
26	//
27	// $Id: G4OpenGLSceneHandler.cc,v 1.55 2009/03/03 14:51:29 lgarnier Exp $
28	// GEANT4 tag $Name: $
29	//
30	//
31	// Andrew Walkden 27th March 1996
32	// OpenGL stored scene - creates OpenGL display lists.
33	// OpenGL immediate scene - draws immediately to buffer
34	// (saving space on server).
35
36	#ifdef G4VIS_BUILD_OPENGL_DRIVER
37
38	// Included here - problems with HP compiler if not before other includes?
39	#include "G4NURBS.hh"
40
41	// Here follows a special for Mesa, the OpenGL emulator. Does not affect
42	// other OpenGL's, as far as I'm aware. John Allison 18/9/96.
43	#define CENTERLINE_CLPP /* CenterLine C++ workaround: */
44	// Also seems to be required for HP's CC and AIX xlC, at least.
45
46	#include "G4OpenGLSceneHandler.hh"
47	#include "G4OpenGLViewer.hh"
48	#include "G4OpenGLFontBaseStore.hh"
49	#include "G4OpenGLTransform3D.hh"
50	#include "G4Point3D.hh"
51	#include "G4Normal3D.hh"
52	#include "G4Transform3D.hh"
53	#include "G4Polyline.hh"
54	#include "G4Polymarker.hh"
55	#include "G4Text.hh"
56	#include "G4Circle.hh"
57	#include "G4Square.hh"
58	#include "G4VMarker.hh"
59	#include "G4Polyhedron.hh"
60	#include "G4VisAttributes.hh"
61	#include "G4PhysicalVolumeModel.hh"
62	#include "G4VPhysicalVolume.hh"
63	#include "G4LogicalVolume.hh"
64	#include "G4VSolid.hh"
65	#include "G4Scene.hh"
66	#include "G4VisExtent.hh"
67	#include "G4AttHolder.hh"
68
69	G4OpenGLSceneHandler::G4OpenGLSceneHandler (G4VGraphicsSystem& system,
70	G4int id,
71	const G4String& name):
72	G4VSceneHandler (system, id, name),
73	fPickName(0),
74	fProcessing2D (false),
75	fProcessingPolymarker(false)
76	{}
77
78	G4OpenGLSceneHandler::~G4OpenGLSceneHandler ()
79	{
80	ClearStore ();
81	}
82
83	const GLubyte G4OpenGLSceneHandler::fStippleMaskHashed [128] = {
84	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
85	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
86	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
87	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
88	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
89	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
90	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
91	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
92	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
93	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
94	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
95	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
96	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
97	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
98	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55,
99	0x55,0x55,0x55,0x55,0x55,0x55,0x55,0x55
100	};
101
102	void G4OpenGLSceneHandler::ClearAndDestroyAtts()
103	{
104	std::map<GLuint, G4AttHolder*>::iterator i;
105	for (i = fPickMap.begin(); i != fPickMap.end(); ++i) delete i->second;
106	fPickMap.clear();
107	}
108
109	void G4OpenGLSceneHandler::PreAddSolid
110	(const G4Transform3D& objectTransformation,
111	const G4VisAttributes& visAttribs)
112	{
113	G4VSceneHandler::PreAddSolid (objectTransformation, visAttribs);
114	}
115
116	void G4OpenGLSceneHandler::BeginPrimitives
117	(const G4Transform3D& objectTransformation)
118	{
119	G4VSceneHandler::BeginPrimitives (objectTransformation);
120	}
121
122	void G4OpenGLSceneHandler::EndPrimitives ()
123	{
124	G4VSceneHandler::EndPrimitives ();
125	}
126
127	void G4OpenGLSceneHandler::BeginPrimitives2D
128	(const G4Transform3D& objectTransformation)
129	{
130	G4VSceneHandler::BeginPrimitives2D (objectTransformation);
131	fProcessing2D = true;
132	}
133
134	void G4OpenGLSceneHandler::EndPrimitives2D ()
135	{
136	fProcessing2D = false;
137	G4VSceneHandler::EndPrimitives2D ();
138	}
139
140	const G4Polyhedron* G4OpenGLSceneHandler::CreateSectionPolyhedron ()
141	{
142	// Clipping done in G4OpenGLViewer::SetView.
143	return 0;
144
145	// But...OpenGL no longer seems to reconstruct clipped edges, so,
146	// when the BooleanProcessor is up to it, abandon this and use
147	// generic clipping in G4VSceneHandler::CreateSectionPolyhedron...
148	// return G4VSceneHandler::CreateSectionPolyhedron();
149	}
150
151	const G4Polyhedron* G4OpenGLSceneHandler::CreateCutawayPolyhedron ()
152	{
153	// Cutaway done in G4OpenGLViewer::SetView.
154	return 0;
155
156	// But...if not, when the BooleanProcessor is up to it...
157	// return G4VSceneHandler::CreateCutawayPolyhedron();
158	}
159
160	void G4OpenGLSceneHandler::AddPrimitive (const G4Polyline& line)
161	{
162	G4int nPoints = line.size ();
163	if (nPoints <= 0) return;
164
165	// Loads G4Atts for picking...
166	if (fpViewer->GetViewParameters().IsPicking()) {
167	G4AttHolder* holder = new G4AttHolder;
168	LoadAtts(line, holder);
169	fPickMap[fPickName] = holder;
170	}
171
172	// Note: colour treated in sub-class.
173
174	if (fpViewer -> GetViewParameters ().IsMarkerNotHidden ())
175	glDisable (GL_DEPTH_TEST);
176	else {glEnable (GL_DEPTH_TEST); glDepthFunc (GL_LESS);}
177
178	glDisable (GL_LIGHTING);
179
180	// Get vis attributes - pick up defaults if none.
181	const G4VisAttributes* pVA =
182	fpViewer -> GetApplicableVisAttributes (line.GetVisAttributes ());
183
184	G4double lineWidth = GetLineWidth(pVA);
185	glLineWidth(lineWidth);
186
187	glBegin (GL_LINE_STRIP);
188	for (G4int iPoint = 0; iPoint < nPoints; iPoint++) {
189	G4double x, y, z;
190	x = line[iPoint].x();
191	y = line[iPoint].y();
192	z = line[iPoint].z();
193	glVertex3d (x, y, z);
194	}
195	glEnd ();
196	}
197
198	void G4OpenGLSceneHandler::AddPrimitive (const G4Polymarker& polymarker)
199	{
200	G4int nPoints = polymarker.size ();
201	if (nPoints <= 0) return;
202
203	fProcessingPolymarker = true;
204
205	// Loads G4Atts for picking...
206	if (fpViewer->GetViewParameters().IsPicking()) {
207	G4AttHolder* holder = new G4AttHolder;
208	LoadAtts(polymarker, holder);
209	fPickMap[fPickName] = holder;
210	}
211
212	switch (polymarker.GetMarkerType()) {
213	default:
214	case G4Polymarker::dots:
215	{
216	for (size_t iPoint = 0; iPoint < polymarker.size (); iPoint++) {
217	G4Circle dot (polymarker);
218	dot.SetPosition (polymarker[iPoint]);
219	dot.SetWorldSize (0.);
220	dot.SetScreenSize (0.1); // Very small circle.
221	G4OpenGLSceneHandler::AddPrimitive (dot);
222	}
223	}
224	break;
225	case G4Polymarker::circles:
226	{
227	for (size_t iPoint = 0; iPoint < polymarker.size (); iPoint++) {
228	G4Circle circle (polymarker);
229	circle.SetPosition (polymarker[iPoint]);
230	G4OpenGLSceneHandler::AddPrimitive (circle);
231	}
232	}
233	break;
234	case G4Polymarker::squares:
235	{
236	for (size_t iPoint = 0; iPoint < polymarker.size (); iPoint++) {
237	G4Square square (polymarker);
238	square.SetPosition (polymarker[iPoint]);
239	G4OpenGLSceneHandler::AddPrimitive (square);
240	}
241	}
242	break;
243	}
244
245	fProcessingPolymarker = false;
246	}
247
248	void G4OpenGLSceneHandler::AddPrimitive (const G4Text& text) {
249
250	// Loads G4Atts for picking...
251	if (fpViewer->GetViewParameters().IsPicking()) {
252	G4AttHolder* holder = new G4AttHolder;
253	LoadAtts(text, holder);
254	fPickMap[fPickName] = holder;
255	}
256
257	const G4Colour& c = GetTextColour (text); // Picks up default if none.
258	MarkerSizeType sizeType;
259	G4double size = GetMarkerSize (text, sizeType);
260	G4ThreeVector position (text.GetPosition ());
261	G4String textString = text.GetText();
262
263	G4int font_base = G4OpenGLFontBaseStore::GetFontBase(fpViewer,size);
264	if (font_base < 0) {
265	static G4int callCount = 0;
266	++callCount;
267	if (callCount <= 10 \|\| callCount%100 == 0) {
268	G4cout <<
269	"G4OpenGLSceneHandler::AddPrimitive (const G4Text&) call count "
270	<< callCount <<
271	"\n No fonts available."
272	"\n Called with text \""
273	<< text.GetText ()
274	<< "\"\n at " << position
275	<< ", size " << size
276	<< ", offsets " << text.GetXOffset () << ", " << text.GetYOffset ()
277	<< ", type " << G4int(sizeType)
278	<< ", colour " << c
279	<< G4endl;
280	}
281	return;
282	}
283	const char* textCString = textString.c_str();
284	glColor3d (c.GetRed (), c.GetGreen (), c.GetBlue ());
285	glDisable (GL_DEPTH_TEST);
286	glDisable (GL_LIGHTING);
287
288	glRasterPos3d(position.x(),position.y(),position.z());
289	// No action on offset or layout at present.
290	glPushAttrib(GL_LIST_BIT);
291	glListBase(font_base);
292	glCallLists(strlen(textCString), GL_UNSIGNED_BYTE, (GLubyte *)textCString);
293	glPopAttrib();
294	}
295
296	void G4OpenGLSceneHandler::AddPrimitive (const G4Circle& circle) {
297	glEnable (GL_POINT_SMOOTH);
298	AddCircleSquare (circle, G4OpenGLBitMapStore::circle);
299	}
300
301	void G4OpenGLSceneHandler::AddPrimitive (const G4Square& square) {
302	glDisable (GL_POINT_SMOOTH);
303	AddCircleSquare (square, G4OpenGLBitMapStore::square);
304	}
305
306	void G4OpenGLSceneHandler::AddCircleSquare
307	(const G4VMarker& marker,
308	G4OpenGLBitMapStore::Shape shape) {
309
310	if (!fProcessingPolymarker) { // Polymarker has already loaded atts.
311	// Loads G4Atts for picking...
312	if (fpViewer->GetViewParameters().IsPicking()) {
313	G4AttHolder* holder = new G4AttHolder;
314	LoadAtts(marker, holder);
315	fPickMap[fPickName] = holder;
316	}
317	}
318
319	// Note: colour treated in sub-class.
320
321	if (fpViewer -> GetViewParameters ().IsMarkerNotHidden ())
322	glDisable (GL_DEPTH_TEST);
323	else {glEnable (GL_DEPTH_TEST); glDepthFunc (GL_LESS);}
324
325	glDisable (GL_LIGHTING);
326
327	// Get vis attributes - pick up defaults if none.
328	const G4VisAttributes* pVA =
329	fpViewer -> GetApplicableVisAttributes (marker.GetVisAttributes ());
330
331	G4double lineWidth = GetLineWidth(pVA);
332	glLineWidth(lineWidth);
333
334	G4VMarker::FillStyle style = marker.GetFillStyle();
335
336	G4bool filled = false;
337	static G4bool hashedWarned = false;
338
339	switch (style) {
340	case G4VMarker::noFill:
341	glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
342	filled = false;
343	break;
344
345	case G4VMarker::hashed:
346	if (!hashedWarned) {
347	G4cout << "Hashed fill style in G4OpenGLSceneHandler."
348	<< "\n Not implemented. Using G4VMarker::filled."
349	<< G4endl;
350	hashedWarned = true;
351	}
352	// Maybe use
353	//glPolygonStipple (fStippleMaskHashed);
354	// Drop through to filled...
355
356	case G4VMarker::filled:
357	glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
358	filled = true;
359	break;
360
361	}
362
363	// A few useful quantities...
364	G4Point3D centre = marker.GetPosition();
365	MarkerSizeType sizeType;
366	G4double size = GetMarkerSize(marker, sizeType);
367
368	// Draw...
369	if (sizeType == world) { // Size specified in world coordinates.
370
371	DrawXYPolygon (shape, size, centre, pVA);
372
373	} else { // Size specified in screen (window) coordinates.
374	glPointSize (size);
375	glBegin (GL_POINTS);
376	glVertex3f(centre.x(),centre.y(),centre.z());
377	glEnd();
378	//Antialiasing
379	glEnable (GL_POINT_SMOOTH);
380	//Transparency
381	glEnable(GL_BLEND);
382	glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
383
384	// L. GARNIER 1 March 2009
385	// Old method, we draw a bitmap instead of a GL_POINT.
386	// I remove it because it cost in term of computing performances
387	// and gl2ps can't draw bitmaps
388
389	// glRasterPos3d(centre.x(),centre.y(),centre.z());
390	// const GLubyte* marker =
391	// G4OpenGLBitMapStore::GetBitMap(shape, size, filled);
392	// glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
393	// glBitmap(GLsizei(size), GLsizei(size), size/2., size/2., 0., 0., marker);
394	}
395	}
396
397	void G4OpenGLSceneHandler::DrawXYPolygon
398	(G4OpenGLBitMapStore::Shape shape,
399	G4double size,
400	const G4Point3D& centre,
401	const G4VisAttributes* pApplicableVisAtts)
402	{
403	G4int nSides;
404	G4double startPhi;
405	if (shape == G4OpenGLBitMapStore::circle) {
406	nSides = GetNoOfSides(pApplicableVisAtts);
407	startPhi = 0.;
408	} else {
409	nSides = 4;
410	startPhi = -pi / 4.;
411	}
412
413	const G4Vector3D& viewpointDirection =
414	fpViewer -> GetViewParameters().GetViewpointDirection();
415	const G4Vector3D& up = fpViewer->GetViewParameters().GetUpVector();
416	const G4double dPhi = twopi / nSides;
417	const G4double radius = size / 2.;
418	G4Vector3D start = radius * (up.cross(viewpointDirection)).unit();
419	G4double phi;
420	G4int i;
421
422	glBegin (GL_POLYGON);
423	for (i = 0, phi = startPhi; i < nSides; i++, phi += dPhi) {
424	G4Vector3D r = start; r.rotate(phi, viewpointDirection);
425	G4Vector3D p = centre + r;
426	glVertex3d (p.x(), p.y(), p.z());
427	}
428	glEnd ();
429	}
430
431	void G4OpenGLSceneHandler::AddPrimitive (const G4Scale& scale)
432	{
433	G4VSceneHandler::AddPrimitive(scale);
434	}
435
436	//Method for handling G4Polyhedron objects for drawing solids.
437	void G4OpenGLSceneHandler::AddPrimitive (const G4Polyhedron& polyhedron) {
438	// Assume all facets are planar convex quadrilaterals.
439	// Draw each facet individually
440
441	if (polyhedron.GetNoFacets() == 0) return;
442
443	// Loads G4Atts for picking...
444	if (fpViewer->GetViewParameters().IsPicking()) {
445	G4AttHolder* holder = new G4AttHolder;
446	const G4Visible vis;
447	printf ("G4OpenGLSceneHandler::AddPrimitives poly %d",&polyhedron);
448	LoadAtts(vis, holder);
449	// LoadAtts(polyhedron, holder);
450	fPickMap[fPickName] = holder;
451	}
452
453	// Get vis attributes - pick up defaults if none.
454	const G4VisAttributes* pVA =
455	fpViewer -> GetApplicableVisAttributes (polyhedron.GetVisAttributes ());
456
457	// Get view parameters that the user can force through the vis
458	// attributes, thereby over-riding the current view parameter.
459	G4ViewParameters::DrawingStyle drawing_style = GetDrawingStyle (pVA);
460
461	//Get colour, etc...
462	G4bool transparency_enabled = true;
463	G4OpenGLViewer* pViewer = dynamic_cast<G4OpenGLViewer*>(fpViewer);
464	if (pViewer) transparency_enabled = pViewer->transparency_enabled;
465	const G4Colour& c = pVA->GetColour();
466	GLfloat materialColour [4];
467	materialColour [0] = c.GetRed ();
468	materialColour [1] = c.GetGreen ();
469	materialColour [2] = c.GetBlue ();
470	if (transparency_enabled) {
471	materialColour [3] = c.GetAlpha ();
472	} else {
473	materialColour [3] = 1.;
474	}
475
476	G4double lineWidth = GetLineWidth(pVA);
477	glLineWidth(lineWidth);
478
479	GLfloat clear_colour[4];
480	glGetFloatv (GL_COLOR_CLEAR_VALUE, clear_colour);
481
482	G4bool isAuxEdgeVisible = GetAuxEdgeVisible (pVA);
483
484	G4bool clipping = pViewer->fVP.IsSection() \|\| pViewer->fVP.IsCutaway();
485
486	// Lighting disabled unless otherwise requested
487	glDisable (GL_LIGHTING);
488
489	switch (drawing_style) {
490	case (G4ViewParameters::hlhsr):
491	// Set up as for hidden line removal but paint polygon faces later...
492	case (G4ViewParameters::hlr):
493	glEnable (GL_STENCIL_TEST);
494	// The stencil buffer is cleared in G4OpenGLViewer::ClearView.
495	// The procedure below leaves it clear.
496	glStencilFunc (GL_ALWAYS, 0, 1);
497	glStencilOp (GL_INVERT, GL_INVERT, GL_INVERT);
498	glEnable (GL_DEPTH_TEST);
499	glDepthFunc (GL_LEQUAL);
500	if (materialColour[3] < 1.) {
501	// Transparent...
502	glDisable (GL_CULL_FACE);
503	glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
504	} else {
505	// Opaque...
506	if (clipping) {
507	glDisable (GL_CULL_FACE);
508	glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
509	} else {
510	glEnable (GL_CULL_FACE);
511	glCullFace (GL_BACK);
512	glPolygonMode (GL_FRONT, GL_LINE);
513	}
514	}
515	glColor3d (c.GetRed (), c.GetGreen (), c.GetBlue ());
516	break;
517	case (G4ViewParameters::hsr):
518	glEnable (GL_DEPTH_TEST);
519	glDepthFunc (GL_LEQUAL);
520	if (materialColour[3] < 1.) {
521	// Transparent...
522	glDepthMask (0); // Make depth buffer read-only.
523	glDisable (GL_CULL_FACE);
524	glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
525	glMaterialfv (GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, materialColour);
526	} else {
527	// Opaque...
528	glDepthMask (1); // Make depth buffer writable (default).
529	if (clipping) {
530	glDisable (GL_CULL_FACE);
531	glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
532	} else {
533	glEnable (GL_CULL_FACE);
534	glCullFace (GL_BACK);
535	glPolygonMode (GL_FRONT, GL_FILL);
536	}
537	glMaterialfv (GL_FRONT, GL_AMBIENT_AND_DIFFUSE, materialColour);
538	}
539	if (!fProcessing2D) glEnable (GL_LIGHTING);
540	break;
541	case (G4ViewParameters::wireframe):
542	default:
543	glEnable (GL_DEPTH_TEST);
544	glDepthFunc (GL_LEQUAL); //??? was GL_ALWAYS
545	glDisable (GL_CULL_FACE);
546	glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
547	glColor3d (c.GetRed (), c.GetGreen (), c.GetBlue ());
548	break;
549	}
550
551	//Loop through all the facets...
552	glBegin (GL_QUADS);
553	G4bool notLastFace;
554	do {
555
556	//First, find vertices, edgeflags and normals and note "not last facet"...
557	G4Point3D vertex[4];
558	G4int edgeFlag[4];
559	G4Normal3D normals[4];
560	G4int n;
561	notLastFace = polyhedron.GetNextFacet(n, vertex, edgeFlag, normals);
562
563	//Loop through the four edges of each G4Facet...
564	G4int edgeCount = 0;
565	for(edgeCount = 0; edgeCount < n; ++edgeCount) {
566	// Check to see if edge is visible or not...
567	if (isAuxEdgeVisible) {
568	edgeFlag[edgeCount] = 1;
569	}
570	if (edgeFlag[edgeCount] > 0) {
571	glEdgeFlag (GL_TRUE);
572	} else {
573	glEdgeFlag (GL_FALSE);
574	}
575	glNormal3d (normals[edgeCount].x(),
576	normals[edgeCount].y(),
577	normals[edgeCount].z());
578	glVertex3d (vertex[edgeCount].x(),
579	vertex[edgeCount].y(),
580	vertex[edgeCount].z());
581	}
582	// HepPolyhedron produces triangles too; in that case add an extra
583	// vertex identical to first...
584	if (n == 3) {
585	edgeCount = 3;
586	normals[edgeCount] = normals[0];
587	vertex[edgeCount] = vertex[0];
588	edgeFlag[edgeCount] = -1;
589	glEdgeFlag (GL_FALSE);
590	glNormal3d (normals[edgeCount].x(),
591	normals[edgeCount].y(),
592	normals[edgeCount].z());
593	glVertex3d (vertex[edgeCount].x(),
594	vertex[edgeCount].y(),
595	vertex[edgeCount].z());
596	}
597	// Trap situation where number of edges is > 4...
598	if (n > 4) {
599	G4cerr <<
600	"G4OpenGLSceneHandler::AddPrimitive(G4Polyhedron): WARNING";
601	G4PhysicalVolumeModel* pPVModel =
602	dynamic_cast<G4PhysicalVolumeModel*>(fpModel);
603	if (pPVModel) {
604	G4VPhysicalVolume* pCurrentPV = pPVModel->GetCurrentPV();
605	G4LogicalVolume* pCurrentLV = pPVModel->GetCurrentLV();
606	G4cerr <<
607	"\n Volume " << pCurrentPV->GetName() <<
608	", Solid " << pCurrentLV->GetSolid()->GetName() <<
609	" (" << pCurrentLV->GetSolid()->GetEntityType();
610	}
611	G4cerr<<
612	"\n G4Polyhedron facet with " << n << " edges" << G4endl;
613	}
614
615	// Do it all over again (twice) for hlr...
616	if (drawing_style == G4ViewParameters::hlr \|\|
617	drawing_style == G4ViewParameters::hlhsr) {
618
619	glEnd (); // Placed here to balance glBegin above, allowing GL
620	// state changes below, then glBegin again. Avoids
621	// having glBegin/End pairs inside loop in the more
622	// usual case of no hidden line removal.
623
624	// Lighting disabled unless otherwise requested
625	glDisable (GL_LIGHTING);
626
627	// Draw through stencil...
628	glStencilFunc (GL_EQUAL, 0, 1);
629	glStencilOp (GL_KEEP, GL_KEEP, GL_KEEP);
630	if (drawing_style == G4ViewParameters::hlhsr) {
631	if (!fProcessing2D) glEnable (GL_LIGHTING);
632	}
633	glEnable (GL_DEPTH_TEST);
634	glDepthFunc (GL_LEQUAL);
635	if (materialColour[3] < 1.) {
636	// Transparent...
637	glDepthMask (0); // Make depth buffer read-only.
638	glDisable (GL_CULL_FACE);
639	glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
640	} else {
641	// Opaque...
642	glDepthMask (1); // Make depth buffer writable (default).
643	if (clipping) {
644	glDisable (GL_CULL_FACE);
645	glPolygonMode (GL_FRONT_AND_BACK, GL_FILL);
646	} else {
647	glEnable (GL_CULL_FACE);
648	glCullFace (GL_BACK);
649	glPolygonMode (GL_FRONT, GL_FILL);
650	}
651	}
652	GLfloat* painting_colour;
653	if (drawing_style == G4ViewParameters::hlr) {
654	if (materialColour[3] < 1.) {
655	// Transparent - don't paint...
656	goto end_of_drawing_through_stencil;
657	}
658	painting_colour = clear_colour;
659	} else { // drawing_style == G4ViewParameters::hlhsr
660	painting_colour = materialColour;
661	}
662	if (materialColour[3] < 1.) {
663	// Transparent...
664	glMaterialfv (GL_FRONT_AND_BACK, GL_AMBIENT_AND_DIFFUSE, painting_colour);
665	} else {
666	// Opaque...
667	glMaterialfv (GL_FRONT, GL_AMBIENT_AND_DIFFUSE, painting_colour);
668	}
669	glColor4fv (painting_colour);
670	glBegin (GL_QUADS);
671	for (int edgeCount = 0; edgeCount < 4; ++edgeCount) {
672	if (edgeFlag[edgeCount] > 0) {
673	glEdgeFlag (GL_TRUE);
674	} else {
675	glEdgeFlag (GL_FALSE);
676	}
677	glNormal3d (normals[edgeCount].x(),
678	normals[edgeCount].y(),
679	normals[edgeCount].z());
680	glVertex3d (vertex[edgeCount].x(),
681	vertex[edgeCount].y(),
682	vertex[edgeCount].z());
683	}
684	glEnd ();
685	end_of_drawing_through_stencil:
686
687	// and once more to reset the stencil bits...
688	glStencilFunc (GL_ALWAYS, 0, 1);
689	glStencilOp (GL_INVERT, GL_INVERT, GL_INVERT);
690	glDepthFunc (GL_LEQUAL); // to make sure line gets drawn.
691	if (materialColour[3] < 1.) {
692	// Transparent...
693	glDisable (GL_CULL_FACE);
694	glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
695	} else {
696	// Opaque...
697	if (clipping) {
698	glDisable (GL_CULL_FACE);
699	glPolygonMode (GL_FRONT_AND_BACK, GL_LINE);
700	} else {
701	glEnable (GL_CULL_FACE);
702	glCullFace (GL_BACK);
703	glPolygonMode (GL_FRONT, GL_LINE);
704	}
705	}
706	glDisable (GL_LIGHTING);
707	glColor3d (c.GetRed (), c.GetGreen (), c.GetBlue ());
708	glBegin (GL_QUADS);
709	for (int edgeCount = 0; edgeCount < 4; ++edgeCount) {
710	if (edgeFlag[edgeCount] > 0) {
711	glEdgeFlag (GL_TRUE);
712	} else {
713	glEdgeFlag (GL_FALSE);
714	}
715	glNormal3d (normals[edgeCount].x(),
716	normals[edgeCount].y(),
717	normals[edgeCount].z());
718	glVertex3d (vertex[edgeCount].x(),
719	vertex[edgeCount].y(),
720	vertex[edgeCount].z());
721	}
722	glEnd ();
723	glDepthFunc (GL_LEQUAL); // Revert for next facet.
724	glBegin (GL_QUADS); // Ready for next facet. GL
725	// says it ignores incomplete
726	// quadrilaterals, so final empty
727	// glBegin/End sequence should be OK.
728	}
729	} while (notLastFace);
730
731	glEnd ();
732	glDisable (GL_STENCIL_TEST); // Revert to default for next primitive.
733	glDepthMask (1); // Revert to default for next primitive.
734	glDisable (GL_LIGHTING); // Revert to default for next primitive.
735	}
736
737	//Method for handling G4NURBS objects for drawing solids.
738	//Knots and Ctrl Pnts MUST be arrays of GLfloats.
739	void G4OpenGLSceneHandler::AddPrimitive (const G4NURBS& nurb) {
740
741	// Loads G4Atts for picking...
742	if (fpViewer->GetViewParameters().IsPicking()) {
743	G4AttHolder* holder = new G4AttHolder;
744	LoadAtts(nurb, holder);
745	fPickMap[fPickName] = holder;
746	}
747
748	GLUnurbsObj *gl_nurb;
749	gl_nurb = gluNewNurbsRenderer ();
750
751	GLfloat u_knot_array, u_knot_array_ptr;
752	u_knot_array = u_knot_array_ptr = new GLfloat [nurb.GetnbrKnots(G4NURBS::U)];
753	G4NURBS::KnotsIterator u_iterator (nurb, G4NURBS::U);
754	while (u_iterator.pick (u_knot_array_ptr++)){}
755
756	GLfloat v_knot_array, v_knot_array_ptr;
757	v_knot_array = v_knot_array_ptr = new GLfloat [nurb.GetnbrKnots(G4NURBS::V)];
758	G4NURBS::KnotsIterator v_iterator (nurb, G4NURBS::V);
759	while (v_iterator.pick (v_knot_array_ptr++)){}
760
761	GLfloat ctrl_pnt_array, ctrl_pnt_array_ptr;
762	ctrl_pnt_array = ctrl_pnt_array_ptr =
763	new GLfloat [nurb.GettotalnbrCtrlPts () * G4NURBS::NofC];
764	G4NURBS::CtrlPtsCoordsIterator c_p_iterator (nurb);
765	while (c_p_iterator.pick (ctrl_pnt_array_ptr++)){}
766
767	// Get vis attributes - pick up defaults if none.
768	const G4VisAttributes* pVA =
769	fpViewer -> GetApplicableVisAttributes (nurb.GetVisAttributes ());
770
771	// Get view parameters that the user can force through the vis
772	// attributes, thereby over-riding the current view parameter.
773	G4ViewParameters::DrawingStyle drawing_style = GetDrawingStyle (pVA);
774	//G4bool isAuxEdgeVisible = GetAuxEdgeVisible (pVA);
775
776	//Get colour, etc..
777	const G4Colour& c = pVA -> GetColour ();
778
779	switch (drawing_style) {
780
781	case (G4ViewParameters::hlhsr):
782	// G4cout << "Hidden line removal not implememented in G4OpenGL.\n"
783	// << "Using hidden surface removal." << G4endl;
784	case (G4ViewParameters::hsr):
785	{
786	if (!fProcessing2D) glEnable (GL_LIGHTING);
787	glEnable (GL_DEPTH_TEST);
788	glEnable (GL_AUTO_NORMAL);
789	glEnable (GL_NORMALIZE);
790	gluNurbsProperty (gl_nurb, GLU_DISPLAY_MODE, GLU_FILL);
791	gluNurbsProperty (gl_nurb, GLU_SAMPLING_TOLERANCE, 50.0);
792	GLfloat materialColour [4];
793	materialColour [0] = c.GetRed ();
794	materialColour [1] = c.GetGreen ();
795	materialColour [2] = c.GetBlue ();
796	materialColour [3] = 1.0; // = c.GetAlpha () for transparency -
797	// but see complication in
798	// AddPrimitive(const G4Polyhedron&).
799	glMaterialfv (GL_FRONT, GL_AMBIENT_AND_DIFFUSE, materialColour);
800	break;
801	}
802	case (G4ViewParameters::hlr):
803	// G4cout << "Hidden line removal not implememented in G4OpenGL.\n"
804	// << "Using wireframe." << G4endl;
805	case (G4ViewParameters::wireframe):
806	default:
807	glDisable (GL_LIGHTING);
808	// glDisable (GL_DEPTH_TEST);
809	glEnable (GL_DEPTH_TEST);
810	glDisable (GL_AUTO_NORMAL);
811	glDisable (GL_NORMALIZE);
812	gluNurbsProperty (gl_nurb, GLU_DISPLAY_MODE, GLU_OUTLINE_POLYGON);
813	gluNurbsProperty (gl_nurb, GLU_SAMPLING_TOLERANCE, 50.0);
814	glColor3d (c.GetRed (), c.GetGreen (), c.GetBlue ());
815	break;
816	}
817
818	gluBeginSurface (gl_nurb);
819	G4int u_stride = 4;
820	G4int v_stride = nurb.GetnbrCtrlPts(G4NURBS::U) * 4;
821
822	gluNurbsSurface (gl_nurb,
823	nurb.GetnbrKnots (G4NURBS::U), (GLfloat*)u_knot_array,
824	nurb.GetnbrKnots (G4NURBS::V), (GLfloat*)v_knot_array,
825	u_stride,
826	v_stride,
827	ctrl_pnt_array,
828	nurb.GetUorder (),
829	nurb.GetVorder (),
830	GL_MAP2_VERTEX_4);
831
832	gluEndSurface (gl_nurb);
833
834	delete [] u_knot_array; // These should be allocated with smart allocators
835	delete [] v_knot_array; // to avoid memory explosion.
836	delete [] ctrl_pnt_array;
837
838	gluDeleteNurbsRenderer (gl_nurb);
839	}
840
841	void G4OpenGLSceneHandler::AddCompound(const G4VTrajectory& traj) {
842	G4VSceneHandler::AddCompound(traj); // For now.
843	}
844
845	void G4OpenGLSceneHandler::AddCompound(const G4VHit& hit) {
846	G4VSceneHandler::AddCompound(hit); // For now.
847	}
848
849	#endif

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