Logo ROOT   6.12/07
Reference Guide
TGLSceneBase.cxx
Go to the documentation of this file.
1 // @(#)root/gl:$Id$
2 // Author: Matevz Tadel, Feb 2007
3 
4 /*************************************************************************
5  * Copyright (C) 1995-2004, Rene Brun and Fons Rademakers. *
6  * All rights reserved. *
7  * *
8  * For the licensing terms see $ROOTSYS/LICENSE. *
9  * For the list of contributors see $ROOTSYS/README/CREDITS. *
10  *************************************************************************/
11 
12 #include "TGLSceneBase.h"
13 #include "TGLSceneInfo.h"
14 #include "TGLViewerBase.h"
15 #include "TGLRnrCtx.h"
16 #include "TGLCamera.h"
17 #include "TGLClip.h"
18 #include "TGLIncludes.h"
19 
20 #include <TMath.h>
21 
22 #include <string>
23 #include <algorithm>
24 
25 /** \class TGLSceneBase
26 \ingroup opengl
27 Scene base-class -- provides basic interface expected by the
28 TGLViewer or its sub-classes:
29  - unique scene id
30  - scene locking
31  - overall bounding box
32  - list of viewers displaying the scene (for update propagation)
33  - virtual interface for draw/select/render (?)
34 
35 The standard ROOT OpenGL scene is implemented in direct sub-class TGLScene.
36 
37 Note that while each scene can be shared among several viewers, ALL
38 of them are obliged to share the same display-list space (this can
39 be achieved on GL-context creation time; Matevz believes that by
40 default all GL contexts must use shared display-lists etc).
41 */
42 
44 
46 
47 ////////////////////////////////////////////////////////////////////////////////
48 
50  TGLLockable(),
51 
52  fTimeStamp (1),
53  fMinorStamp (1),
54  fLOD (TGLRnrCtx::kLODHigh),
55  fStyle (TGLRnrCtx::kStyleUndef),
56  fWFLineW (0),
57  fOLLineW (0),
58  fClip (0),
59  fSelectable (kTRUE),
60  fBoundingBox (),
61  fBoundingBoxValid (kFALSE),
62  fDoFrustumCheck (kTRUE),
63  fDoClipCheck (kTRUE),
64  fAutoDestruct (kTRUE)
65 {
66  // Default constructor.
67 
69  fName = Form("unnamed-%d", fSceneID);
70 }
71 
72 ////////////////////////////////////////////////////////////////////////////////
73 /// Destructor.
74 
76 {
77  for (ViewerList_i i=fViewers.begin(); i!=fViewers.end(); ++i)
78  {
79  (*i)->SceneDestructing(this);
80  }
81 }
82 
83 ////////////////////////////////////////////////////////////////////////////////
84 /// Add viewer to the list.
85 
87 {
88  ViewerList_i i = std::find(fViewers.begin(), fViewers.end(), viewer);
89  if (i == fViewers.end())
90  fViewers.push_back(viewer);
91  else
92  Warning("TGLSceneBase::AddViewer", "viewer already in the list.");
93 }
94 
95 ////////////////////////////////////////////////////////////////////////////////
96 /// Remove viewer from the list.
97 /// If auto-destruct is on and the last viewer is removed the scene
98 /// destructs itself.
99 
101 {
102  ViewerList_i i = std::find(fViewers.begin(), fViewers.end(), viewer);
103  if (i != fViewers.end())
104  fViewers.erase(i);
105  else
106  Warning("TGLSceneBase::RemoveViewer", "viewer not found in the list.");
107 
108  if (fViewers.empty() && fAutoDestruct)
109  {
110  if (gDebug > 0)
111  Info("TGLSceneBase::RemoveViewer", "scene '%s' not used - autodestructing.", GetName());
112  delete this;
113  }
114 }
115 ////////////////////////////////////////////////////////////////////////////////
116 /// Tag all viewers as changed.
117 
119 {
120  for (ViewerList_i i=fViewers.begin(); i!=fViewers.end(); ++i)
121  {
122  (*i)->Changed();
123  }
124 }
125 
126 /**************************************************************************/
127 
128 ////////////////////////////////////////////////////////////////////////////////
129 /// Name printed on locking info messages.
130 
131 const char* TGLSceneBase::LockIdStr() const
132 {
133  return Form("TGLSceneBase %s", fName.Data());
134 }
135 
136 /**************************************************************************/
137 // SceneInfo management
138 /**************************************************************************/
139 
140 ////////////////////////////////////////////////////////////////////////////////
141 /// Create a scene-info instance appropriate for this scene class.
142 /// Here we instantiate the scene-info base-class TGLSceneInfo.
143 
145 {
146  return new TGLSceneInfo(view, this);
147 }
148 
149 ////////////////////////////////////////////////////////////////////////////////
150 /// Fill scene-info with very basic information that is practically
151 /// view independent. This is called when scene content is changed
152 /// or when camera-interest changes.
153 
155 {
156  TGLSceneInfo* sinfo = ctx.GetSceneInfo();
157 
158  sinfo->SetLastClip(0);
159  sinfo->SetLastCamera(0);
160 }
161 
162 ////////////////////////////////////////////////////////////////////////////////
163 /// Fill scene-info with information needed for rendering, take into
164 /// account the render-context (viewer state, camera, clipping).
165 /// Usually called from TGLViewer before rendering a scene if some
166 /// moderately significant part of render-context has changed.
167 ///
168 /// Here we update the basic state (clear last-LOD, mark the time,
169 /// set global <-> scene transformation matrices) and potentially
170 /// study and refine the clipping planes based on scene bounding box.
171 
173 {
174  if (gDebug > 3)
175  {
176  Info("TGLSceneBase::UpdateSceneInfo",
177  "'%s' timestamp=%u",
178  GetName(), fTimeStamp);
179  }
180 
181  TGLSceneInfo* sinfo = ctx.GetSceneInfo();
182 
183  // ------------------------------------------------------------
184  // Reset
185  // ------------------------------------------------------------
186 
189  sinfo->SetSceneStamp(fTimeStamp);
190 
191  sinfo->InFrustum (kTRUE);
192  sinfo->InClip (kTRUE);
194 
195  // ------------------------------------------------------------
196  // Setup
197  // ------------------------------------------------------------
198 
199  // !!!
200  // setup scene transformation matrices
201  // so far the matrices in scene-base and scene-info are not enabled
202  // sinfo->fSceneToGlobal = scene-info-trans * scene-base-trans;
203  // sinfo->fGlobalToScene = inv of above;
204  // transform to clip and to eye coordinates also interesting
205  //
206  // All these are now done in TGLViewerBase::PreRender() via
207  // TGLSceneInfo::SetupTransformsAndBBox().
208 
209  sinfo->SetLastClip(0);
210  sinfo->FrustumPlanes().clear();
211  sinfo->ClipPlanes().clear();
212 
213  if (fDoFrustumCheck)
214  {
215  for (Int_t i=0; i<TGLCamera::kPlanesPerFrustum; ++i)
216  {
218  // !!! transform plane
219  switch (BoundingBox().Overlap(p))
220  {
221  case Rgl::kInside: // Whole scene passes ... no need to store it.
222  break;
223  case Rgl::kPartial:
224  sinfo->FrustumPlanes().push_back(p);
225  break;
226  case Rgl::kOutside:
227  sinfo->InFrustum(kFALSE);
228  break;
229  }
230  }
231  }
232 
233  if (fDoClipCheck && ctx.HasClip())
234  {
235  if (ctx.Clip()->GetMode() == TGLClip::kOutside)
237  else
239 
240  std::vector<TGLPlane> planeSet;
241  ctx.Clip()->PlaneSet(planeSet);
242 
243  // Strip any planes outside the scene bounding box - no effect
244  std::vector<TGLPlane>::iterator it = planeSet.begin();
245  while (it != planeSet.end())
246  {
247  // !!! transform plane
248  switch (BoundingBox().Overlap(*it))
249  {
250  case Rgl::kInside: // Whole scene passes ... no need to store it.
251  break;
252  case Rgl::kPartial:
253  sinfo->ClipPlanes().push_back(*it);
254  break;
255  case Rgl::kOutside: // Depends on mode
256  if (sinfo->ClipMode() == TGLSceneInfo::kClipOutside)
257  {
258  // Scene is outside of whole clip object - nothing visible.
259  sinfo->InClip(kFALSE);
260  }
261  else
262  {
263  // Scene is completely inside of whole clip object -
264  // draw all scene without clipping.
266  }
267  // In either case further checks not needed.
268  sinfo->ClipPlanes().clear();
269  return;
270  }
271  ++it;
272  }
273  sinfo->SetLastClip(ctx.Clip());
274  sinfo->SetClipStamp(ctx.Clip()->TimeStamp());
275  }
276 
277  sinfo->SetLastCamera(ctx.GetCamera());
278  sinfo->SetCameraStamp(ctx.GetCamera()->TimeStamp());
279 }
280 
281 ////////////////////////////////////////////////////////////////////////////////
282 /// Setup LOD-dependant values in scene-info.
283 ///
284 /// Nothing to be done here but to store the last LOD.
285 
287 {
288  if (gDebug > 3)
289  {
290  Info("TGLSceneBase::LodifySceneInfo",
291  "'%s' timestamp=%u lod=%d",
292  GetName(), fTimeStamp, ctx.CombiLOD());
293  }
294 
295  TGLSceneInfo & sInfo = * ctx.GetSceneInfo();
296  sInfo.SetLastLOD(ctx.CombiLOD());
297 }
298 
299 
300 /**************************************************************************/
301 // Rendering
302 /**************************************************************************/
303 
304 ////////////////////////////////////////////////////////////////////////////////
305 /// Perform basic pre-render initialization:
306 /// - calculate LOD, Style, Clipping,
307 /// - build draw lists.
308 ///
309 /// This is called in the beginning of the GL-viewer draw cycle.
310 
312 {
313  if ( ! IsDrawOrSelectLock()) {
314  Error("TGLSceneBase::FullRender", "expected Draw or Select Lock");
315  }
316 
317  TGLSceneInfo& sInfo = * rnrCtx.GetSceneInfo();
318 
319  // Bounding-box check done elsewhere (in viewer::pre-render)
320 
321  if (fTimeStamp > sInfo.SceneStamp())
322  {
323  RebuildSceneInfo(rnrCtx);
324  }
325 
326 
327  Bool_t needUpdate = sInfo.HasUpdateTimeouted();
328 
329  if (rnrCtx.GetCamera() != sInfo.LastCamera())
330  {
331  sInfo.ResetCameraStamp();
332  needUpdate = kTRUE;
333  }
334  else if (rnrCtx.GetCamera()->TimeStamp() > sInfo.CameraStamp())
335  {
336  needUpdate = kTRUE;
337  }
338 
339  TGLClip* clip = 0;
340  if (sInfo.Clip() != 0) clip = sInfo.Clip();
341  else if (fClip != 0) clip = fClip;
342  else clip = rnrCtx.ViewerClip();
343  if (clip != sInfo.LastClip())
344  {
345  sInfo.ResetClipStamp();
346  needUpdate = kTRUE;
347  }
348  else if (clip && clip->TimeStamp() > sInfo.ClipStamp())
349  {
350  needUpdate = kTRUE;
351  }
352  rnrCtx.SetClip(clip);
353 
354  if (needUpdate)
355  {
356  UpdateSceneInfo(rnrCtx);
357  }
358 
359 
360  // Setup LOD ... optionally lodify.
361  Short_t lod;
362  if (sInfo.LOD() != TGLRnrCtx::kLODUndef) lod = sInfo.LOD();
363  else if (fLOD != TGLRnrCtx::kLODUndef) lod = fLOD;
364  else lod = rnrCtx.ViewerLOD();
365  rnrCtx.SetSceneLOD(lod);
366  rnrCtx.SetCombiLOD(TMath::Min(rnrCtx.ViewerLOD(), rnrCtx.SceneLOD()));
367  if (needUpdate || rnrCtx.CombiLOD() != sInfo.LastLOD())
368  {
369  LodifySceneInfo(rnrCtx);
370  }
371 
372  // Setup style.
373  Short_t style;
374  if (sInfo.Style() != TGLRnrCtx::kStyleUndef) style = sInfo.Style();
375  else if (fStyle != TGLRnrCtx::kStyleUndef) style = fStyle;
376  else style = rnrCtx.ViewerStyle();
377  rnrCtx.SetSceneStyle(style);
378  sInfo.SetLastStyle(style);
379 
380  // Wireframe line width.
381  Float_t wf_linew;
382  if (sInfo.WFLineW() != 0) wf_linew = sInfo.WFLineW();
383  else if (fWFLineW != 0) wf_linew = fWFLineW;
384  else wf_linew = rnrCtx.ViewerWFLineW();
385  rnrCtx.SetSceneWFLineW(wf_linew);
386  sInfo.SetLastWFLineW(wf_linew);
387  // Outline line width.
388  Float_t ol_linew;
389  if (sInfo.OLLineW() != 0) ol_linew = sInfo.OLLineW();
390  else if (fOLLineW != 0) ol_linew = fOLLineW;
391  else ol_linew = rnrCtx.ViewerOLLineW();
392  rnrCtx.SetSceneOLLineW(ol_linew);
393  sInfo.SetLastOLLineW(ol_linew);
394 }
395 
396 ////////////////////////////////////////////////////////////////////////////////
397 /// Perform pre-render initialization - fill rnrCtx with
398 /// values stored during PreDraw().
399 ///
400 /// This is called each time before RenderXyzz().
401 
403 {
404  TGLSceneInfo& sInfo = * rnrCtx.GetSceneInfo();
405 
406  rnrCtx.SetClip (sInfo.LastClip());
407  rnrCtx.SetCombiLOD (sInfo.LastLOD());
408  rnrCtx.SetSceneStyle (sInfo.LastStyle());
409  rnrCtx.SetSceneWFLineW (sInfo.LastWFLineW());
410  rnrCtx.SetSceneOLLineW (sInfo.LastOLLineW());
411 
412  // !!!
413  // eventually handle matrix stack.
414  // glPushMatrix();
415  // glMultMatrix(something-from-scene-info);
416  // Should also fix camera matrices
417 }
418 
419 ////////////////////////////////////////////////////////////////////////////////
420 /// This function does rendering of all stages, the shapes are
421 /// rendered in the following order: opaque, transparent,
422 /// selected-opaque, selected-transparent.
423 ///
424 /// GL-depth buffer is cleared after transparent shapes have been
425 /// rendered.
426 ///
427 /// This is never called from ROOT GL directly. Use it if you know
428 /// you are rendering a single scene.
429 
431 {
432  RenderOpaque(rnrCtx);
433  RenderTransp(rnrCtx);
434  RenderSelOpaque(rnrCtx);
435  RenderSelTransp(rnrCtx);
436 }
437 
438 ////////////////////////////////////////////////////////////////////////////////
439 /// Render opaque elements.
440 
442 {
443 }
444 
445 ////////////////////////////////////////////////////////////////////////////////
446 /// Render transparent elements.
447 
449 {
450 }
451 
452 ////////////////////////////////////////////////////////////////////////////////
453 /// Render selected opaque elements.
454 
456 {
457 }
458 
459 ////////////////////////////////////////////////////////////////////////////////
460 /// Render selected transparent elements for highlight.
461 
463 {
464 }
465 
466 ////////////////////////////////////////////////////////////////////////////////
467 /// Render selected opaque elements for highlight.
468 
470 {
471 }
472 
473 ////////////////////////////////////////////////////////////////////////////////
474 /// Render selected transparent elements.
475 
477 {
478 }
479 
480 ////////////////////////////////////////////////////////////////////////////////
481 /// Perform post-render clean-up.
482 
484 {
485  // !!!
486  // Cleanup matrix stack
487  // glPopMatrix();
488  // Should also fix camera matrices
489 }
490 
491 ////////////////////////////////////////////////////////////////////////////////
492 /// Finalize drawing.
493 ///
494 /// This is called at the end of the GL-viewer draw cycle.
495 
497 {
498 }
499 
500 /**************************************************************************/
501 // Selection
502 /**************************************************************************/
503 
504 ////////////////////////////////////////////////////////////////////////////////
505 /// Process selection record rec.
506 /// 'curIdx' is the item position where the scene should start
507 /// its processing.
508 /// Return TRUE if an object has been identified or FALSE otherwise.
509 /// The scene-info member of the record is already set by the caller.
510 ///
511 /// See implementation in sub-class TGLScene, here we just return FALSE.
512 
514  Int_t /*curIdx*/)
515 {
516  return kFALSE;
517 }
void AddViewer(TGLViewerBase *viewer)
Add viewer to the list.
The TGLRnrCtx class aggregates data for a given redering context as needed by various parts of the RO...
Definition: TGLRnrCtx.h:40
void InClip(Bool_t c)
Definition: TGLSceneInfo.h:100
virtual void Render(TGLRnrCtx &rnrCtx)
This function does rendering of all stages, the shapes are rendered in the following order: opaque...
virtual TGLSceneInfo * CreateSceneInfo(TGLViewerBase *view)
Create a scene-info instance appropriate for this scene class.
float Float_t
Definition: RtypesCore.h:53
TGLClip * Clip() const
Definition: TGLSceneInfo.h:121
Bool_t HasClip() const
Definition: TGLRnrCtx.h:202
Bool_t HasUpdateTimeouted() const
Definition: TGLSceneInfo.h:153
Bool_t fDoClipCheck
Definition: TGLSceneBase.h:59
void SetLastClip(TGLClip *p)
Definition: TGLSceneInfo.h:136
Bool_t fDoFrustumCheck
Definition: TGLSceneBase.h:58
TGLClip * LastClip() const
Definition: TGLSceneInfo.h:135
void RemoveViewer(TGLViewerBase *viewer)
Remove viewer from the list.
void ResetCameraStamp()
Definition: TGLSceneInfo.h:151
Float_t ViewerOLLineW() const
Definition: TGLRnrCtx.h:191
Scene base-class – provides basic interface expected by the TGLViewer or its sub-classes: ...
Definition: TGLSceneBase.h:32
virtual void PreRender(TGLRnrCtx &rnrCtx)
Perform pre-render initialization - fill rnrCtx with values stored during PreDraw().
Float_t OLLineW() const
Definition: TGLSceneInfo.h:118
void SetCameraStamp(UInt_t ts)
Definition: TGLSceneInfo.h:150
Abstract clipping shape - derives from TGLPhysicalShape Adds clip mode (inside/outside) and pure virt...
Definition: TGLClip.h:31
UInt_t fSceneID
Definition: TGLSceneBase.h:41
virtual void RenderSelTransp(TGLRnrCtx &rnrCtx)
Render selected transparent elements for highlight.
TGLSceneInfo * GetSceneInfo()
Definition: TGLRnrCtx.h:158
void ResetClipStamp()
Definition: TGLSceneInfo.h:147
Short_t Min(Short_t a, Short_t b)
Definition: TMathBase.h:168
int Int_t
Definition: RtypesCore.h:41
bool Bool_t
Definition: RtypesCore.h:59
UInt_t TimeStamp() const
Definition: TGLCamera.h:125
UInt_t SceneStamp() const
Definition: TGLSceneInfo.h:141
virtual void RenderSelOpaque(TGLRnrCtx &rnrCtx)
Render selected opaque elements.
Float_t ViewerWFLineW() const
Definition: TGLRnrCtx.h:187
Float_t fWFLineW
Definition: TGLSceneBase.h:49
TGLClip * ViewerClip() const
Definition: TGLRnrCtx.h:196
Base class for GL viewers.
Definition: TGLViewerBase.h:36
std::vector< TGLPlane > & FrustumPlanes()
Definition: TGLSceneInfo.h:107
std::vector< TGLPlane > & ClipPlanes()
Definition: TGLSceneInfo.h:108
void SetSceneLOD(Short_t LOD)
Definition: TGLRnrCtx.h:174
virtual const char * LockIdStr() const
Name printed on locking info messages.
Short_t SceneLOD() const
Definition: TGLRnrCtx.h:173
TGLClip * fClip
Definition: TGLSceneBase.h:51
TGLCamera * GetCamera()
Definition: TGLRnrCtx.h:156
Float_t fOLLineW
Definition: TGLSceneBase.h:50
void SetLastLOD(Short_t ld)
Definition: TGLSceneInfo.h:125
virtual void UpdateSceneInfo(TGLRnrCtx &ctx)
Fill scene-info with information needed for rendering, take into account the render-context (viewer s...
UInt_t CameraStamp() const
Definition: TGLSceneInfo.h:149
virtual ~TGLSceneBase()
Destructor.
void Info(const char *location, const char *msgfmt,...)
void SetLastCamera(TGLCamera *p)
Definition: TGLSceneInfo.h:139
Float_t WFLineW() const
Definition: TGLSceneInfo.h:116
void SetSceneStamp(UInt_t ts)
Definition: TGLSceneInfo.h:142
void Error(const char *location, const char *msgfmt,...)
static UInt_t fgSceneIDSrc
Definition: TGLSceneBase.h:38
EMode GetMode() const
Definition: TGLClip.h:60
Short_t CombiLOD() const
Definition: TGLRnrCtx.h:175
virtual void RenderTransp(TGLRnrCtx &rnrCtx)
Render transparent elements.
virtual void RenderSelOpaqueForHighlight(TGLRnrCtx &rnrCtx)
Render selected opaque elements for highlight.
void SetSceneStyle(Short_t sty)
Definition: TGLRnrCtx.h:185
TGLCamera * LastCamera() const
Definition: TGLSceneInfo.h:138
const TGLBoundingBox & BoundingBox() const
Definition: TGLSceneBase.h:138
void SetSceneWFLineW(Float_t w)
Definition: TGLRnrCtx.h:190
Float_t LastOLLineW() const
Definition: TGLSceneInfo.h:132
virtual void RenderSelTranspForHighlight(TGLRnrCtx &rnrCtx)
Render selected transparent elements.
Short_t fStyle
Definition: TGLSceneBase.h:48
virtual void RebuildSceneInfo(TGLRnrCtx &ctx)
Fill scene-info with very basic information that is practically view independent. ...
UInt_t fTimeStamp
Definition: TGLSceneBase.h:45
void SetLastStyle(Short_t st)
Definition: TGLSceneInfo.h:128
Float_t LastWFLineW() const
Definition: TGLSceneInfo.h:130
Short_t fLOD
Definition: TGLSceneBase.h:47
void SetCombiLOD(Short_t LOD)
Definition: TGLRnrCtx.h:176
void SetSceneOLLineW(Float_t w)
Definition: TGLRnrCtx.h:194
Standard selection record including information about containing scene and details ob out selected ob...
virtual void PlaneSet(TGLPlaneSet_t &set) const =0
unsigned int UInt_t
Definition: RtypesCore.h:42
Bool_t IsDrawOrSelectLock() const
Definition: TGLLockable.h:63
char * Form(const char *fmt,...)
virtual Bool_t ResolveSelectRecord(TGLSelectRecord &rec, Int_t curIdx)
Process selection record rec.
short Short_t
Definition: RtypesCore.h:35
virtual void LodifySceneInfo(TGLRnrCtx &ctx)
Setup LOD-dependant values in scene-info.
void Warning(const char *location, const char *msgfmt,...)
const Bool_t kFALSE
Definition: RtypesCore.h:88
Char_t ClipMode() const
Definition: TGLSceneInfo.h:101
Bool_t fAutoDestruct
Definition: TGLSceneBase.h:66
Short_t LastStyle() const
Definition: TGLSceneInfo.h:127
#define ClassImp(name)
Definition: Rtypes.h:359
virtual const char * GetName() const
Definition: TGLSceneBase.h:81
TCanvas * style()
Definition: style.C:1
std::list< TGLViewerBase * >::iterator ViewerList_i
Definition: TGLSceneBase.h:63
void SetClip(TGLClip *p)
Definition: TGLRnrCtx.h:201
UInt_t ClipStamp() const
Definition: TGLSceneInfo.h:145
Short_t LastLOD() const
Definition: TGLSceneInfo.h:124
TGLClip * Clip() const
Definition: TGLRnrCtx.h:200
Short_t LOD() const
Definition: TGLSceneInfo.h:110
TString fName
Definition: TGLSceneBase.h:42
const TGLPlane & FrustumPlane(EFrustumPlane plane) const
Definition: TGLCamera.h:219
Base class for extended scene context.
Definition: TGLSceneInfo.h:26
R__EXTERN Int_t gDebug
Definition: Rtypes.h:86
UInt_t TimeStamp() const
Definition: TGLClip.h:63
Short_t Style() const
Definition: TGLSceneInfo.h:113
Short_t ViewerStyle() const
Definition: TGLRnrCtx.h:182
virtual void RenderOpaque(TGLRnrCtx &rnrCtx)
Render opaque elements.
void TagViewersChanged()
Tag all viewers as changed.
void SetLastWFLineW(Float_t w)
Definition: TGLSceneInfo.h:131
virtual void PreDraw(TGLRnrCtx &rnrCtx)
Perform basic pre-render initialization:
Rgl::EOverlap Overlap(const TGLPlane &plane) const
Find overlap (Inside, Outside, Partial) of plane c.f. bounding box.
void InFrustum(Bool_t f)
Definition: TGLSceneInfo.h:98
ViewerList_t fViewers
Definition: TGLSceneBase.h:65
Simple locking interface used by viewer and scene.
Definition: TGLLockable.h:17
const Bool_t kTRUE
Definition: RtypesCore.h:87
3D plane class - of format Ax + By + Cz + D = 0
Definition: TGLUtil.h:525
Short_t ViewerLOD() const
Definition: TGLRnrCtx.h:171
virtual void PostRender(TGLRnrCtx &rnrCtx)
Perform post-render clean-up.
void SetLastOLLineW(Float_t w)
Definition: TGLSceneInfo.h:133
virtual void PostDraw(TGLRnrCtx &rnrCtx)
Finalize drawing.
void SetClipStamp(UInt_t ts)
Definition: TGLSceneInfo.h:146
const char * Data() const
Definition: TString.h:345