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[occt.git] / src / OpenGl / OpenGl_View.cxx
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b311480e 1// Created on: 2011-09-20
2// Created by: Sergey ZERCHANINOV
3// Copyright (c) 2011-2012 OPEN CASCADE SAS
4//
5// The content of this file is subject to the Open CASCADE Technology Public
6// License Version 6.5 (the "License"). You may not use the content of this file
7// except in compliance with the License. Please obtain a copy of the License
8// at http://www.opencascade.org and read it completely before using this file.
9//
10// The Initial Developer of the Original Code is Open CASCADE S.A.S., having its
11// main offices at: 1, place des Freres Montgolfier, 78280 Guyancourt, France.
12//
13// The Original Code and all software distributed under the License is
14// distributed on an "AS IS" basis, without warranty of any kind, and the
15// Initial Developer hereby disclaims all such warranties, including without
16// limitation, any warranties of merchantability, fitness for a particular
17// purpose or non-infringement. Please see the License for the specific terms
18// and conditions governing the rights and limitations under the License.
19
2166f0fa 20
5f8b738e 21#include <OpenGl_GlCore11.hxx>
22
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23#include <OpenGl_View.hxx>
24
25#include <OpenGl_Workspace.hxx>
26#include <OpenGl_Display.hxx>
27
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28#include <OpenGl_Display.hxx>
29#include <OpenGl_Trihedron.hxx>
30#include <OpenGl_GraduatedTrihedron.hxx>
31
32#include <OpenGl_transform_persistence.hxx>
33
5f8b738e 34#include <GL/glu.h> // gluUnProject()
35
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SK
36IMPLEMENT_STANDARD_HANDLE(OpenGl_View,MMgt_TShared)
37IMPLEMENT_STANDARD_RTTIEXT(OpenGl_View,MMgt_TShared)
38
39/*----------------------------------------------------------------------*/
40
41static const OPENGL_BG_TEXTURE myDefaultBgTexture = { 0, 0, 0, Aspect_FM_CENTERED };
42static const OPENGL_BG_GRADIENT myDefaultBgGradient = { {{ 0.F, 0.F, 0.F, 1.F }}, {{ 0.F, 0.F, 0.F, 1.F }}, Aspect_GFM_NONE };
43static const Tmatrix3 myDefaultMatrix = { { 1.F, 0.F, 0.F, 0.F }, { 0.F, 1.F, 0.F, 0.F }, { 0.F, 0.F, 1.F, 0.F }, { 0.F, 0.F, 0.F, 1.F } };
44static const OPENGL_ZCLIP myDefaultZClip = { { Standard_True, 0.F }, { Standard_True, 1.F } };
45static const OPENGL_EXTRA_REP myDefaultExtra =
46{
47 //vrp
48 { 0.F, 0.F, 0.F },
49 //vpn
50 { 0.F, 0.F, 1.F },
51 //vup
52 { 0.F, 1.F, 0.F },
53 //map
54 {
55 //window
56 { 0.F, 0.F, 1.F, 1.F },
57 //viewport
58 { 0.F, 0.F, 0.F, 1.F, 1.F, 1.F },
59 //proj
60 TelParallel,
61 //prp
62 { 0.F, 0.F, 0.F },
63 //vpd
64 0.F,
65 //fpd
66 0.F,
67 //bpd
68 -1.F
69 },
70 //scaleFactors
71 { 1.F, 1.F, 1.F }
72};
73
74static const OPENGL_FOG myDefaultFog = { Standard_False, 0.F, 1.F, { { 0.F, 0.F, 0.F, 1.F } } };
75static const TEL_TRANSFORM_PERSISTENCE myDefaultTransPers = { 0, 0.F, 0.F, 0.F };
76
77/*----------------------------------------------------------------------*/
78
79OpenGl_View::OpenGl_View (const CALL_DEF_VIEWCONTEXT &AContext)
80: myTextureEnv(0),
81 mySurfaceDetail(Visual3d_TOD_NONE),
82 myBackfacing(0),
83 myBgTexture(myDefaultBgTexture),
84 myBgGradient(myDefaultBgGradient),
85 //myOrientationMatrix(myDefaultMatrix),
86 //myMappingMatrix(myDefaultMatrix),
87 //shield_indicator = TOn,
88 //shield_colour = { { 0.F, 0.F, 0.F, 1.F } },
89 //border_indicator = TOff,
90 //border_colour = { { 0.F, 0.F, 0.F, 1.F } },
91 //active_status = TOn,
92 myZClip(myDefaultZClip),
93 myExtra(myDefaultExtra),
94 myFog(myDefaultFog),
95 myVisualization(AContext.Visualization),
96 myIntShadingMethod(TEL_SM_GOURAUD),
97 myAntiAliasing(Standard_False),
98 myAnimationListIndex(0),
99 myAnimationListReady(Standard_False),
100 myTransPers(&myDefaultTransPers),
101 myIsTransPers(Standard_False),
102 myResetFLIST(Standard_False)
103{
104 // Initialize matrices
105 memcpy(myOrientationMatrix,myDefaultMatrix,sizeof(Tmatrix3));
106 memcpy(myMappingMatrix,myDefaultMatrix,sizeof(Tmatrix3));
107
108 // Shading method
109 switch (AContext.Model)
110 {
111 case 1 : /* VISUAL3D_TOM_INTERP_COLOR */
112 case 3 : /* VISUAL3D_TOM_VERTEX */
113 myIntShadingMethod = TEL_SM_GOURAUD;
114 break;
115 default :
116 myIntShadingMethod = TEL_SM_FLAT;
117 break;
118 }
119}
120
121/*----------------------------------------------------------------------*/
122
123OpenGl_View::~OpenGl_View ()
124{
125 if (myAnimationListIndex)
126 glDeleteLists((GLuint)myAnimationListIndex,1);
127
128 if ( myBgTexture.TexId != 0 )
129 glDeleteTextures( 1, (GLuint*)&(myBgTexture.TexId) );
130}
131
132/*----------------------------------------------------------------------*/
133
134void OpenGl_View::SetBackfacing (const Standard_Integer AMode)
135{
136 myBackfacing = AMode;
137 myResetFLIST = Standard_True;
138}
139
140/*----------------------------------------------------------------------*/
141
142//call_togl_setlight
143void OpenGl_View::SetLights (const CALL_DEF_VIEWCONTEXT &AContext)
144{
145 myLights.Clear();
146
147 const int nb_lights = AContext.NbActiveLight;
148
149 int i = 0;
150 const CALL_DEF_LIGHT *alight = &(AContext.ActiveLight[0]);
151 for ( ; i < nb_lights; i++, alight++ )
152 {
153 OpenGl_Light rep;
154
155 switch( alight->LightType )
156 {
157 case 0 : /* TOLS_AMBIENT */
158 rep.type = TLightAmbient;
159 rep.col.rgb[0] = alight->Color.r;
160 rep.col.rgb[1] = alight->Color.g;
161 rep.col.rgb[2] = alight->Color.b;
162 break;
163
164 case 1 : /* TOLS_DIRECTIONAL */
165 rep.type = TLightDirectional;
166 rep.col.rgb[0] = alight->Color.r;
167 rep.col.rgb[1] = alight->Color.g;
168 rep.col.rgb[2] = alight->Color.b;
169 rep.dir[0] = alight->Direction.x;
170 rep.dir[1] = alight->Direction.y;
171 rep.dir[2] = alight->Direction.z;
172 break;
173
174 case 2 : /* TOLS_POSITIONAL */
175 rep.type = TLightPositional;
176 rep.col.rgb[0] = alight->Color.r;
177 rep.col.rgb[1] = alight->Color.g;
178 rep.col.rgb[2] = alight->Color.b;
179 rep.pos[0] = alight->Position.x;
180 rep.pos[1] = alight->Position.y;
181 rep.pos[2] = alight->Position.z;
182 rep.atten[0] = alight->Attenuation[0];
183 rep.atten[1] = alight->Attenuation[1];
184 break;
185
186 case 3 : /* TOLS_SPOT */
187 rep.type = TLightSpot;
188 rep.col.rgb[0] = alight->Color.r;
189 rep.col.rgb[1] = alight->Color.g;
190 rep.col.rgb[2] = alight->Color.b;
191 rep.pos[0] = alight->Position.x;
192 rep.pos[1] = alight->Position.y;
193 rep.pos[2] = alight->Position.z;
194 rep.dir[0] = alight->Direction.x;
195 rep.dir[1] = alight->Direction.y;
196 rep.dir[2] = alight->Direction.z;
197 rep.shine = alight->Concentration;
198 rep.atten[0] = alight->Attenuation[0];
199 rep.atten[1] = alight->Attenuation[1];
200 rep.angle = alight->Angle;
201 break;
202 }
203
204 rep.HeadLight = alight->Headlight;
205
206 myLights.Append(rep);
207 }
208}
209
210/*----------------------------------------------------------------------*/
211
212//call_togl_setplane
213void OpenGl_View::SetClippingPlanes (const CALL_DEF_VIEWCONTEXT &AContext)
214{
215 // clear clipping planes information
216 myClippingPlanes.Clear();
217 // update information
218 int i = 0;
219 for (; i < AContext.NbActivePlane; i++)
220 {
221 const CALL_DEF_PLANE &aCPlane = AContext.ActivePlane[i];
222 if ( aCPlane.Active && aCPlane.PlaneId > 0 )
223 {
224 OPENGL_CLIP_REP aPlane;
225 aPlane.equation[0] = aCPlane.CoefA;
226 aPlane.equation[1] = aCPlane.CoefB;
227 aPlane.equation[2] = aCPlane.CoefC;
228 aPlane.equation[3] = aCPlane.CoefD;
229 myClippingPlanes.Append( aPlane );
230 }
231 }
232}
233
234/*----------------------------------------------------------------------*/
235
236//call_togl_setvisualisation
237void OpenGl_View::SetVisualisation (const CALL_DEF_VIEWCONTEXT &AContext)
238{
239 myVisualization = AContext.Visualization;
240 // Shading method
241 switch (AContext.Model)
242 {
243 case 1 : /* VISUAL3D_TOM_INTERP_COLOR */
244 case 3 : /* VISUAL3D_TOM_VERTEX */
245 myIntShadingMethod = TEL_SM_GOURAUD;
246 break;
247 default :
248 myIntShadingMethod = TEL_SM_FLAT;
249 break;
250 }
251}
252
253/*----------------------------------------------------------------------*/
254
255//call_togl_cliplimit
256void OpenGl_View::SetClipLimit (const CALL_DEF_VIEW &ACView)
257{
258 myZClip.Back.Limit =
259 ( ACView.Context.ZClipBackPlane - ACView.Mapping.BackPlaneDistance ) /
260 ( ACView.Mapping.FrontPlaneDistance - ACView.Mapping.BackPlaneDistance );
261 myZClip.Front.Limit =
262 ( ACView.Context.ZClipFrontPlane - ACView.Mapping.BackPlaneDistance ) /
263 ( ACView.Mapping.FrontPlaneDistance - ACView.Mapping.BackPlaneDistance );
264 if ( myZClip.Back.Limit < 0.F )
265 myZClip.Back.Limit = 0.F;
266 if ( myZClip.Front.Limit > 1.F )
267 myZClip.Front.Limit = 1.F;
268 if ( myZClip.Back.Limit > myZClip.Front.Limit )
269 {
270 myZClip.Back.Limit = 0.F;
271 myZClip.Front.Limit = 1.F;
272 }
273
274 myZClip.Back.IsOn = (ACView.Context.BackZClipping != 0);
275 myZClip.Front.IsOn = (ACView.Context.FrontZClipping != 0);
276}
277
278/*----------------------------------------------------------------------*/
279
280//call_togl_viewmapping
281void OpenGl_View::SetMapping (const CALL_DEF_VIEW &ACView)
282{
283 const float ratio = ACView.DefWindow.dy / ACView.DefWindow.dx;
284 const float r_ratio = ACView.DefWindow.dx / ACView.DefWindow.dy;
285
286 TEL_VIEW_MAPPING Map;
287
288 Map.window.xmin = ACView.Mapping.WindowLimit.um;
289 Map.window.ymin = ACView.Mapping.WindowLimit.vm;
290 Map.window.xmax = ACView.Mapping.WindowLimit.uM;
291 Map.window.ymax = ACView.Mapping.WindowLimit.vM;
292
293 Map.viewport.xmin = 0.F;
294 Map.viewport.xmax = ( 1.F < r_ratio ? 1.F : r_ratio );
295 Map.viewport.ymin = 0.F;
296 Map.viewport.ymax = ( 1.F < ratio ? 1.F : ratio );
297 Map.viewport.zmin = 0.F;
298 Map.viewport.zmax = 1.F;
299
300 /* projection type */
301 switch( ACView.Mapping.Projection )
302 {
303 case 0 :
304 Map.proj = TelPerspective;
305 break;
306 case 1 :
307 Map.proj = TelParallel;
308 break;
309 }
310
311 /* projection reference point */
312 Map.prp[0] = ACView.Mapping.ProjectionReferencePoint.x;
313 Map.prp[1] = ACView.Mapping.ProjectionReferencePoint.y;
314 Map.prp[2] = ACView.Mapping.ProjectionReferencePoint.z;
315 if (!openglDisplay.IsNull() && !openglDisplay->Walkthrough())
316 Map.prp[2] += ACView.Mapping.FrontPlaneDistance;
317
318 /* view plane distance */
319 Map.vpd = ACView.Mapping.ViewPlaneDistance;
320
321 /* back plane distance */
322 Map.bpd = ACView.Mapping.BackPlaneDistance;
323
324 /* front plane distance */
325 Map.fpd = ACView.Mapping.FrontPlaneDistance;
326
327 Tint err_ind = 0;
328
329 /* use user-defined matrix */
330 if ( ACView.Mapping.IsCustomMatrix )
331 {
332 int i, j;
333 for( i = 0; i < 4; i++ )
334 for( j = 0; j < 4; j++ )
335 myMappingMatrix[i][j] = ACView.Mapping.ProjectionMatrix[i][j];
336 }
337 else
338 TelEvalViewMappingMatrix( &Map, &err_ind, myMappingMatrix );
339
340 if ( !err_ind )
341 myExtra.map = Map;
342}
343
344/*----------------------------------------------------------------------*/
345
346//call_togl_vieworientation
347void OpenGl_View::SetOrientation (const CALL_DEF_VIEW &ACView)
348{
349 Tfloat Vrp[3];
350 Tfloat Vpn[3];
351 Tfloat Vup[3];
352 Tfloat ScaleFactors[3];
353
354 Vrp[0] = ACView.Orientation.ViewReferencePoint.x;
355 Vrp[1] = ACView.Orientation.ViewReferencePoint.y;
356 Vrp[2] = ACView.Orientation.ViewReferencePoint.z;
357
358 Vpn[0] = ACView.Orientation.ViewReferencePlane.x;
359 Vpn[1] = ACView.Orientation.ViewReferencePlane.y;
360 Vpn[2] = ACView.Orientation.ViewReferencePlane.z;
361
362 Vup[0] = ACView.Orientation.ViewReferenceUp.x;
363 Vup[1] = ACView.Orientation.ViewReferenceUp.y;
364 Vup[2] = ACView.Orientation.ViewReferenceUp.z;
365
366 ScaleFactors[0] = ACView.Orientation.ViewScaleX;
367 ScaleFactors[1] = ACView.Orientation.ViewScaleY;
368 ScaleFactors[2] = ACView.Orientation.ViewScaleZ;
369
370 Tint err_ind = 0;
371
372 // use user-defined matrix
373 if ( ACView.Orientation.IsCustomMatrix )
374 {
375 int i, j;
376 for( i = 0; i < 4; i++ )
377 for( j = 0; j < 4; j++ )
378 myOrientationMatrix[i][j] = ACView.Orientation.ModelViewMatrix[i][j];
379 }
380 else
381 TelEvalViewOrientationMatrix( Vrp, Vpn, Vup, ScaleFactors, &err_ind, myOrientationMatrix );
382
383 if ( !err_ind )
384 {
385 myExtra.vrp[0] = Vrp[0];
386 myExtra.vrp[1] = Vrp[1];
387 myExtra.vrp[2] = Vrp[2];
388
389 myExtra.vpn[0] = Vpn[0];
390 myExtra.vpn[1] = Vpn[1];
391 myExtra.vpn[2] = Vpn[2];
392
393 myExtra.vup[0] = Vup[0];
394 myExtra.vup[1] = Vup[1];
395 myExtra.vup[2] = Vup[2];
396
397 myExtra.scaleFactors[0] = ScaleFactors[0],
398 myExtra.scaleFactors[1] = ScaleFactors[1],
399 myExtra.scaleFactors[2] = ScaleFactors[2];
400 }
401}
402
403/*----------------------------------------------------------------------*/
404
405void OpenGl_View::SetFog (const CALL_DEF_VIEW &ACView, const Standard_Boolean AFlag)
406{
407 if( !AFlag )
408 {
409 myFog.IsOn = Standard_False;
410 }
411 else
412 {
413 myFog.IsOn = Standard_True;
414
415 myFog.Front =
416 (ACView.Context.DepthFrontPlane - ACView.Mapping.BackPlaneDistance) /
417 (ACView.Mapping.FrontPlaneDistance - ACView.Mapping.BackPlaneDistance);
418
419 myFog.Back =
420 (ACView.Context.DepthBackPlane - ACView.Mapping.BackPlaneDistance) /
421 (ACView.Mapping.FrontPlaneDistance - ACView.Mapping.BackPlaneDistance);
422
423 if (myFog.Front < 0.F)
424 myFog.Front = 0.F;
425 else if (myFog.Front > 1.F)
426 myFog.Front = 1.F;
427
428 if (myFog.Back < 0.F)
429 myFog.Back = 0.F;
430 else if (myFog.Back > 1.F)
431 myFog.Back = 1.F;
432
433 if (myFog.Back > myFog.Front)
434 {
435 myFog.Front = 1.F;
436 myFog.Back = 0.F;
437 }
438
439 myFog.Color.rgb[0] = ACView.DefWindow.Background.r;
440 myFog.Color.rgb[1] = ACView.DefWindow.Background.g;
441 myFog.Color.rgb[2] = ACView.DefWindow.Background.b;
442 myFog.Color.rgb[3] = 1.F;
443 }
444}
445
446/*----------------------------------------------------------------------*/
447
448void OpenGl_View::TriedronDisplay (const Aspect_TypeOfTriedronPosition APosition, const Quantity_NameOfColor AColor,
449 const Standard_Real AScale, const Standard_Boolean AsWireframe)
450{
451 myTrihedron = new OpenGl_Trihedron (APosition, AColor, AScale, AsWireframe);
452}
453
454/*----------------------------------------------------------------------*/
455
456void OpenGl_View::TriedronErase ()
457{
458 myTrihedron.Nullify();
459}
460
461/*----------------------------------------------------------------------*/
462
463void OpenGl_View::GraduatedTrihedronDisplay (const Graphic3d_CGraduatedTrihedron &data)
464{
465 myGraduatedTrihedron = new OpenGl_GraduatedTrihedron(data);
466}
467
468/*----------------------------------------------------------------------*/
469
470void OpenGl_View::GraduatedTrihedronErase ()
471{
472 myGraduatedTrihedron.Nullify();
473}
474
475/*----------------------------------------------------------------------*/
476
477//transform_persistence_end
478void OpenGl_View::EndTransformPersistence ()
479{
480 if ( myIsTransPers )
481 {
482 /* restore matrix */
483 glMatrixMode (GL_PROJECTION);
484 glPopMatrix ();
485 glMatrixMode (GL_MODELVIEW);
486 glPopMatrix ();
487 myIsTransPers = Standard_False;
488 }
489}
490
491/*----------------------------------------------------------------------*/
492
493//transform_persistence_begin
494const TEL_TRANSFORM_PERSISTENCE * OpenGl_View::BeginTransformPersistence (const TEL_TRANSFORM_PERSISTENCE *ATransPers)
495{
496 const TEL_TRANSFORM_PERSISTENCE *TransPers_old = myTransPers;
497
498 if ( ATransPers->mode == 0 )
499 {
500 EndTransformPersistence();
501 return TransPers_old;
502 }
503
504 myTransPers = ATransPers;
505
506 GLint viewport[4];
507 glGetIntegerv (GL_VIEWPORT, viewport);
508 GLdouble modelMatrix[4][4];
509 glGetDoublev( GL_MODELVIEW_MATRIX, (GLdouble *) modelMatrix );
510 GLdouble projMatrix[4][4];
511 glGetDoublev( GL_PROJECTION_MATRIX, (GLdouble *) projMatrix );
512
513 double W = viewport[2];
514 double H = viewport[3];
515
516 if ( myIsTransPers )
517 {
518 /* restore matrix */
519 glMatrixMode (GL_PROJECTION);
520 glPopMatrix ();
521 glMatrixMode (GL_MODELVIEW);
522 glPopMatrix ();
523 }
524 else
525 myIsTransPers = Standard_True;
526
527 glMatrixMode( GL_MODELVIEW );
528 glPushMatrix();
529 glLoadIdentity();
530
531 glMatrixMode( GL_PROJECTION );
532 glPushMatrix();
533 glLoadIdentity();
534
535 /*pre loading matrix*/
536 if( ATransPers->mode & TPF_PAN )
537 /* Annulate translate matrix */
538 {
539 modelMatrix[3][0] = 0.;
540 modelMatrix[3][1] = 0.;
541 modelMatrix[3][2] = 0.;
542 projMatrix[3][0] = 0.;
543 projMatrix[3][1] = 0.;
544 projMatrix[3][2] = 0.;
545 }
546
547 if( ATransPers->mode & TPF_ZOOM )
548 /* Annulate zoom matrix */
549 {
550 const double scaleX = myExtra.scaleFactors[0];
551 const double scaleY = myExtra.scaleFactors[1];
552 const double scaleZ = myExtra.scaleFactors[2];
553
554 for (int i = 0; i < 3; ++i)
555 {
556 modelMatrix[0][i] /= scaleX;
557 modelMatrix[1][i] /= scaleY;
558 modelMatrix[2][i] /= scaleZ;
559 }
560
561 const double det2 = 0.002 / ( W > H ? projMatrix[1][1] : projMatrix[0][0]);
562 projMatrix[0][0] *= det2;
563 projMatrix[1][1] *= det2;
564 }
565
566 if( ATransPers->mode & TPF_ROTATE )
567 /* Annulate rotate matrix */
568 {
569 modelMatrix[0][0] = 1.;
570 modelMatrix[1][1] = 1.;
571 modelMatrix[2][2] = 1.;
572
573 modelMatrix[1][0] = 0.;
574 modelMatrix[2][0] = 0.;
575 modelMatrix[0][1] = 0.;
576 modelMatrix[2][1] = 0.;
577 modelMatrix[0][2] = 0.;
578 modelMatrix[1][2] = 0.;
579 }
580 else if( ATransPers->mode & TPF_RELATIVE_ROTATE )
581 /* Initialize relative rotate matrix*/
582 {
583 modelMatrix[3][0] = 0.;
584 modelMatrix[3][1] = 0.;
585 modelMatrix[3][2] = 0.;
586
587 glMatrixMode( GL_MODELVIEW );
588 glLoadIdentity();
589 glTranslated( ATransPers->pointX, ATransPers->pointY, ATransPers->pointZ );
590 }
591
592 if( ATransPers->mode == TPF_TRIEDRON )
593 {
594 /* Annulate translation matrix */
595 modelMatrix[3][0] = 0.;
596 modelMatrix[3][1] = 0.;
597 modelMatrix[3][2] = 0.;
598
599 projMatrix[3][0] = 0.;
600 projMatrix[3][1] = 0.;
601 projMatrix[3][2] = 0.;
602
603 const double det2 = 0.002 / ( W > H ? projMatrix[1][1] : projMatrix[0][0]);
604 projMatrix[0][0] *= det2;
605 projMatrix[1][1] *= det2;
606 }
607
608 /* load matrix */
609 glMatrixMode (GL_MODELVIEW);
610 glMultMatrixd ((GLdouble *) modelMatrix);
611
612 glMatrixMode (GL_PROJECTION);
613 glMultMatrixd ((GLdouble *) projMatrix);
614
615 /*post loading matrix*/
616 if( ATransPers->mode == TPF_TRIEDRON )
617 {
618 glMatrixMode( GL_PROJECTION );
619
620 double winx, winy, winz;
621 const GLdouble idenMatrix[4][4] = { {1.,0.,0.,0.}, {0.,1.,0.,0.}, {0.,0.,1.,0.}, {0.,0.,0.,1.} };
622
623 gluUnProject( W/2., H/2., 0., (GLdouble*)idenMatrix, (GLdouble*)projMatrix, (GLint*)viewport, &winx, &winy, &winz);
624 double W1, H1;
625 W1 = winx;
626 H1 = winy;
627 gluUnProject( -W/2., -H/2., 0., (GLdouble*)idenMatrix, (GLdouble*)projMatrix, (GLint*)viewport, &winx, &winy, &winz);
628 double W2, H2;
629 W2 = winx;
630 H2 = winy;
631
632 if( ATransPers->pointX == 0. && ATransPers->pointY == 0. )
633 {
634 /*center*/
635 }
636 else if( ATransPers->pointX > 0. && ATransPers->pointY > 0. )
637 {
638 /*right upper*/
639 glTranslated( 0.5*(W1 - W2 - ATransPers->pointZ), 0.5*(H1 - H2 - ATransPers->pointZ), 0. );
640 }
641 else if( ATransPers->pointX > 0. && ATransPers->pointY < 0. )
642 {
643 /*right lower*/
644 glTranslated( 0.5*(W1 - W2 - ATransPers->pointZ), 0.5*(H2 - H1 + ATransPers->pointZ), 0. );
645 }
646 else if( ATransPers->pointX < 0. && ATransPers->pointY > 0. )
647 {
648 /*left upper*/
649 glTranslated( 0.5*(W2 - W1 + ATransPers->pointZ), 0.5*(H1 - H2 - ATransPers->pointZ), 0. );
650 }
651 else if( ATransPers->pointX < 0 && ATransPers->pointY < 0 )
652 {
653 /*left lower*/
654 glTranslated( -(W1 - W2)/2. + ATransPers->pointZ/2., -(H1-H2)/2. + ATransPers->pointZ/2., 0. );
655 }
656 }
657
658 return TransPers_old;
659}
660
661/*----------------------------------------------------------------------*/