1 | |
---|
2 | |
---|
3 | |
---|
4 | |
---|
5 | |
---|
6 | |
---|
7 | |
---|
8 | |
---|
9 | |
---|
10 | |
---|
11 | |
---|
12 | |
---|
13 | |
---|
14 | |
---|
15 | |
---|
16 | |
---|
17 | |
---|
18 | #include <osgShadow/LightSpacePerspectiveShadowMap> |
---|
19 | #include <osg/io_utils> |
---|
20 | #include <iostream> |
---|
21 | #include <iomanip> |
---|
22 | |
---|
23 | #define DIRECTIONAL_ONLY 0 |
---|
24 | #define DIRECTIONAL_ADAPTED 1 |
---|
25 | #define DIRECTIONAL_AND_SPOT 2 |
---|
26 | |
---|
27 | |
---|
28 | #define LISPSM_ALGO DIRECTIONAL_ADAPTED |
---|
29 | |
---|
30 | |
---|
31 | #define ROBERTS_TEST_CHANGES 1 |
---|
32 | |
---|
33 | #define PRINT_COMPUTED_N_OPT 0 |
---|
34 | |
---|
35 | using namespace osgShadow; |
---|
36 | |
---|
37 | |
---|
38 | |
---|
39 | |
---|
40 | |
---|
41 | |
---|
42 | |
---|
43 | |
---|
44 | |
---|
45 | |
---|
46 | #if 0 |
---|
47 | |
---|
48 | |
---|
49 | |
---|
50 | |
---|
51 | |
---|
52 | |
---|
53 | |
---|
54 | |
---|
55 | |
---|
56 | |
---|
57 | |
---|
58 | |
---|
59 | |
---|
60 | |
---|
61 | |
---|
62 | |
---|
63 | |
---|
64 | void calcLispSMMtx(struct VecPoint* B) { |
---|
65 | Vector3 min, max; |
---|
66 | Vector3 up; |
---|
67 | Matrix4x4 lispMtx; |
---|
68 | struct VecPoint Bcopy = VECPOINT_NULL; |
---|
69 | double dotProd = dot(viewDir,lightDir); |
---|
70 | double sinGamma; |
---|
71 | |
---|
72 | sinGamma = sqrt(1.0-dotProd*dotProd); |
---|
73 | |
---|
74 | copyMatrix(lispMtx,IDENTITY); |
---|
75 | |
---|
76 | copyVecPoint(&Bcopy,*B); |
---|
77 | |
---|
78 | |
---|
79 | if(useBodyVec) { |
---|
80 | Vector3 newDir; |
---|
81 | calcNewDir(newDir,B); |
---|
82 | calcUpVec(up,newDir,lightDir); |
---|
83 | } |
---|
84 | else { |
---|
85 | calcUpVec(up,viewDir,lightDir); |
---|
86 | } |
---|
87 | |
---|
88 | |
---|
89 | |
---|
90 | |
---|
91 | |
---|
92 | look(lightView,eyePos,lightDir,up); |
---|
93 | |
---|
94 | |
---|
95 | transformVecPoint(B,lightView); |
---|
96 | |
---|
97 | |
---|
98 | |
---|
99 | |
---|
100 | calcCubicHull(min,max,B->points,B->size); |
---|
101 | |
---|
102 | { |
---|
103 | |
---|
104 | const double factor = 1.0/sinGamma; |
---|
105 | const double z_n = factor*nearDist; |
---|
106 | const double d = absDouble(max[1]-min[1]); |
---|
107 | const double z_f = z_n + d*sinGamma; |
---|
108 | const double n = (z_n+sqrt(z_f*z_n))/sinGamma; |
---|
109 | const double f = n+d; |
---|
110 | Vector3 pos; |
---|
111 | |
---|
112 | |
---|
113 | |
---|
114 | linCombVector3(pos,eyePos,up,-(n-nearDist)); |
---|
115 | |
---|
116 | look(lightView,pos,lightDir,up); |
---|
117 | |
---|
118 | |
---|
119 | |
---|
120 | copyMatrix(lispMtx,IDENTITY); |
---|
121 | lispMtx[ 5] = (f+n)/(f-n); |
---|
122 | lispMtx[13] = -2*f*n/(f-n); |
---|
123 | lispMtx[ 7] = 1; |
---|
124 | lispMtx[15] = 0; |
---|
125 | |
---|
126 | |
---|
127 | mult(lightProjection,lispMtx,lightView); |
---|
128 | |
---|
129 | |
---|
130 | transformVecPoint(&Bcopy,lightProjection); |
---|
131 | |
---|
132 | |
---|
133 | |
---|
134 | |
---|
135 | calcCubicHull(min,max,Bcopy.points,Bcopy.size); |
---|
136 | } |
---|
137 | |
---|
138 | |
---|
139 | |
---|
140 | |
---|
141 | scaleTranslateToFit(lightProjection,min,max); |
---|
142 | |
---|
143 | |
---|
144 | mult(lightProjection,lightProjection,lispMtx); |
---|
145 | } |
---|
146 | #endif |
---|
147 | |
---|
148 | #if ( LISPSM_ALGO == DIRECTIONAL_ONLY ) |
---|
149 | |
---|
150 | |
---|
151 | LightSpacePerspectiveShadowMapAlgorithm::LightSpacePerspectiveShadowMapAlgorithm() |
---|
152 | { |
---|
153 | lispsm = NULL; |
---|
154 | } |
---|
155 | |
---|
156 | LightSpacePerspectiveShadowMapAlgorithm::~LightSpacePerspectiveShadowMapAlgorithm() |
---|
157 | { |
---|
158 | } |
---|
159 | |
---|
160 | void LightSpacePerspectiveShadowMapAlgorithm::operator() |
---|
161 | ( const osgShadow::ConvexPolyhedron* hullShadowedView, |
---|
162 | const osg::Camera* cameraMain, |
---|
163 | osg::Camera* cameraShadow ) const |
---|
164 | { |
---|
165 | osg::BoundingBox bb = hullShadowedView->computeBoundingBox( cameraMain->getViewMatrix() ); |
---|
166 | double nearDist = -bb._max[2]; |
---|
167 | |
---|
168 | const osg::Matrix & eyeViewToWorld = cameraMain->getInverseViewMatrix(); |
---|
169 | |
---|
170 | osg::Matrix lightViewToWorld = cameraShadow->getInverseViewMatrix(); |
---|
171 | |
---|
172 | osg::Vec3d eyePos = osg::Vec3d( 0, 0, 0 ) * eyeViewToWorld; |
---|
173 | |
---|
174 | osg::Vec3d viewDir( osg::Matrix::transform3x3( osg::Vec3d(0,0,-1), eyeViewToWorld ) ); |
---|
175 | |
---|
176 | osg::Vec3d lightDir( osg::Matrix::transform3x3( osg::Vec3d( 0,0,-1), lightViewToWorld ) ); |
---|
177 | osg::Vec3d up( osg::Matrix::transform3x3( osg::Vec3d(0,1,0), lightViewToWorld ) ); |
---|
178 | |
---|
179 | osg::Matrix lightView; |
---|
180 | lightView.makeLookAt( eyePos, eyePos + lightDir, up ); |
---|
181 | bb = hullShadowedView->computeBoundingBox( lightView ); |
---|
182 | |
---|
183 | const double dotProd = viewDir * lightDir; |
---|
184 | const double sinGamma = sqrt(1.0- dotProd*dotProd); |
---|
185 | const double factor = 1.0/sinGamma; |
---|
186 | const double z_n = factor*nearDist; |
---|
187 | |
---|
188 | const double d = fabs( bb._max[1]-bb._min[1]); |
---|
189 | const double z_f = z_n + d*sinGamma; |
---|
190 | const double n = (z_n+sqrt(z_f*z_n))/sinGamma; |
---|
191 | const double f = n+d; |
---|
192 | osg::Vec3d pos = eyePos-up*(n-nearDist); |
---|
193 | |
---|
194 | #if PRINT_COMPUTED_N_OPT |
---|
195 | std::cout |
---|
196 | << " N=" << std::setw(8) << n |
---|
197 | << " n=" << std::setw(8) << z_n |
---|
198 | << " f=" << std::setw(8) << z_f |
---|
199 | << "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b" |
---|
200 | << std::flush; |
---|
201 | #endif |
---|
202 | |
---|
203 | lightView.makeLookAt( pos, pos + lightDir, up ); |
---|
204 | |
---|
205 | |
---|
206 | |
---|
207 | double a = (f+n)/(f-n); |
---|
208 | double b = -2*f*n/(f-n); |
---|
209 | |
---|
210 | osg::Matrix lispProjection( 1, 0, 0, 0, |
---|
211 | 0, a, 0, 1, |
---|
212 | 0, 0,-1, 0, |
---|
213 | 0, b, 0, 0 ); |
---|
214 | |
---|
215 | |
---|
216 | #if 0 |
---|
217 | { |
---|
218 | osg::Matrix mvp = _camera->getViewMatrix() * |
---|
219 | _camera->getProjectionMatrix(); |
---|
220 | |
---|
221 | extendScenePolytope( mvp, osg::Matrix::inverse( mvp ) ); |
---|
222 | } |
---|
223 | #endif |
---|
224 | |
---|
225 | bb = hullShadowedView->computeBoundingBox( lightView * lispProjection ); |
---|
226 | |
---|
227 | osg::Matrix fitToUnitFrustum; |
---|
228 | fitToUnitFrustum.makeOrtho( bb._min[0], bb._max[0], |
---|
229 | bb._min[1], bb._max[1], |
---|
230 | -(bb._min[2]-1), -bb._max[2] ); |
---|
231 | |
---|
232 | cameraShadow->setProjectionMatrix |
---|
233 | ( lightViewToWorld * lightView * lispProjection * fitToUnitFrustum ); |
---|
234 | |
---|
235 | |
---|
236 | #if 0 // DOUBLE CHECK! |
---|
237 | bb = computeScenePolytopeBounds |
---|
238 | ( cameraShadow->getViewMatrix() * cameraShadow->getProjectionMatrix() ); |
---|
239 | |
---|
240 | if( !osg::equivalent( 0.f, (bb._min - osg::Vec3d(-1,-1,-1)).length2() ) || |
---|
241 | !osg::equivalent( 0.f, (bb._max - osg::Vec3d( 1, 1, 1)).length2() ) ) |
---|
242 | { |
---|
243 | bb = computeScenePolytopeBounds |
---|
244 | ( cameraShadow->getViewMatrix() * cameraShadow->getProjectionMatrix() ); |
---|
245 | } |
---|
246 | #endif |
---|
247 | } |
---|
248 | |
---|
249 | #endif |
---|
250 | |
---|
251 | |
---|
252 | |
---|
253 | #if ( LISPSM_ALGO == DIRECTIONAL_ADAPTED ) |
---|
254 | |
---|
255 | LightSpacePerspectiveShadowMapAlgorithm::LightSpacePerspectiveShadowMapAlgorithm() |
---|
256 | { |
---|
257 | lispsm = NULL; |
---|
258 | } |
---|
259 | |
---|
260 | LightSpacePerspectiveShadowMapAlgorithm::~LightSpacePerspectiveShadowMapAlgorithm() |
---|
261 | { |
---|
262 | } |
---|
263 | |
---|
264 | void LightSpacePerspectiveShadowMapAlgorithm::operator() |
---|
265 | ( const osgShadow::ConvexPolyhedron* hullShadowedView, |
---|
266 | const osg::Camera* cameraMain, |
---|
267 | osg::Camera* cameraShadow ) const |
---|
268 | { |
---|
269 | |
---|
270 | |
---|
271 | |
---|
272 | osg::Matrix mvpLight = |
---|
273 | cameraShadow->getViewMatrix() * cameraShadow->getProjectionMatrix(); |
---|
274 | |
---|
275 | osg::Matrix m = cameraMain->getInverseViewMatrix() * mvpLight; |
---|
276 | osg::Vec3 eye = osg::Vec3( 0, 0, 0 ) * m; |
---|
277 | osg::Vec3 center = osg::Vec3( 0, 0, -1 ) * m; |
---|
278 | osg::Vec3 up(0,1,0); |
---|
279 | osg::Vec3 viewDir( center - eye ); |
---|
280 | viewDir.normalize(); |
---|
281 | |
---|
282 | m.makeLookAt( eye, center, up ); |
---|
283 | |
---|
284 | osg::BoundingBox bb = hullShadowedView->computeBoundingBox( mvpLight * m ); |
---|
285 | if( !bb.valid() ) |
---|
286 | { |
---|
287 | #if ROBERTS_TEST_CHANGES |
---|
288 | |
---|
289 | #endif |
---|
290 | return; |
---|
291 | } |
---|
292 | |
---|
293 | double nearDist = -bb._max[2]; |
---|
294 | |
---|
295 | #if 1 |
---|
296 | |
---|
297 | |
---|
298 | |
---|
299 | |
---|
300 | |
---|
301 | |
---|
302 | |
---|
303 | |
---|
304 | |
---|
305 | |
---|
306 | |
---|
307 | |
---|
308 | |
---|
309 | |
---|
310 | |
---|
311 | |
---|
312 | |
---|
313 | |
---|
314 | |
---|
315 | |
---|
316 | |
---|
317 | |
---|
318 | |
---|
319 | |
---|
320 | |
---|
321 | if( eye[2] < 0 && nearDist <= 0 ) |
---|
322 | { |
---|
323 | float clampedNearDist = 0.0001; |
---|
324 | eye += viewDir * ( clampedNearDist - nearDist ); |
---|
325 | nearDist = clampedNearDist; |
---|
326 | #if ROBERTS_TEST_CHANGES |
---|
327 | |
---|
328 | #endif |
---|
329 | |
---|
330 | } |
---|
331 | #endif |
---|
332 | |
---|
333 | |
---|
334 | #if ROBERTS_TEST_CHANGES |
---|
335 | if (nearDist<0.0) |
---|
336 | { |
---|
337 | nearDist = 0.0; |
---|
338 | |
---|
339 | } |
---|
340 | #endif |
---|
341 | |
---|
342 | |
---|
343 | |
---|
344 | |
---|
345 | |
---|
346 | |
---|
347 | |
---|
348 | |
---|
349 | |
---|
350 | |
---|
351 | |
---|
352 | osg::Vec3 lightDir(0,0,-1); |
---|
353 | osg::Matrix lightView; |
---|
354 | lightView.makeLookAt( eye, eye + lightDir, up ); |
---|
355 | bb = hullShadowedView->computeBoundingBox( mvpLight * lightView ); |
---|
356 | if( !bb.valid() ) |
---|
357 | { |
---|
358 | #if ROBERTS_TEST_CHANGES |
---|
359 | |
---|
360 | #endif |
---|
361 | return; |
---|
362 | } |
---|
363 | |
---|
364 | |
---|
365 | const double dotProd = viewDir * lightDir; |
---|
366 | const double sinGamma = sqrt(1.0- dotProd*dotProd); |
---|
367 | const double factor = 1.0/sinGamma; |
---|
368 | const double z_n = factor*nearDist; |
---|
369 | |
---|
370 | const double d = fabs( bb._max[1]-bb._min[1]); |
---|
371 | const double z_f = z_n + d*sinGamma; |
---|
372 | double n = (z_n+sqrt(z_f*z_n))/sinGamma; |
---|
373 | |
---|
374 | #if ROBERTS_TEST_CHANGES |
---|
375 | |
---|
376 | float minRatio=0.02; |
---|
377 | if (n<d*minRatio) |
---|
378 | { |
---|
379 | n=d*minRatio; |
---|
380 | |
---|
381 | } |
---|
382 | #endif |
---|
383 | const double f = n+d; |
---|
384 | osg::Vec3d pos = eye-up*(n-nearDist); |
---|
385 | |
---|
386 | lightView.makeLookAt( pos, pos + lightDir, up ); |
---|
387 | |
---|
388 | |
---|
389 | |
---|
390 | double a = (f+n)/(f-n); |
---|
391 | double b = -2*f*n/(f-n); |
---|
392 | |
---|
393 | osg::Matrix lispProjection( 1, 0, 0, 0, |
---|
394 | 0, a, 0, 1, |
---|
395 | 0, 0, 1, 0, |
---|
396 | 0, b, 0, 0 ); |
---|
397 | |
---|
398 | cameraShadow->setProjectionMatrix |
---|
399 | ( cameraShadow->getProjectionMatrix() * lightView * lispProjection ); |
---|
400 | |
---|
401 | |
---|
402 | |
---|
403 | } |
---|
404 | |
---|
405 | #endif |
---|
406 | |
---|
407 | #if ( LISPSM_ALGO == DIRECTIONAL_AND_SPOT ) |
---|
408 | |
---|
409 | |
---|
410 | |
---|
411 | |
---|
412 | |
---|
413 | |
---|
414 | |
---|
415 | |
---|
416 | |
---|
417 | #include <limits.h> |
---|
418 | static const float OSG_INFINITY = FLT_MAX; |
---|
419 | |
---|
420 | namespace osgShadow { |
---|
421 | |
---|
422 | class LispSM { |
---|
423 | public: |
---|
424 | typedef std::vector<osg::Vec3d> Vertices; |
---|
425 | |
---|
426 | void setProjectionMatrix( const osg::Matrix & projectionMatrix ) |
---|
427 | { _projectionMatrix = projectionMatrix; } |
---|
428 | |
---|
429 | void setViewMatrix( const osg::Matrix & viewMatrix ) |
---|
430 | { _viewMatrix = viewMatrix; } |
---|
431 | |
---|
432 | void setHull( const ConvexPolyhedron & hull ) |
---|
433 | { _hull = hull; } |
---|
434 | |
---|
435 | const ConvexPolyhedron & getHull( ) const |
---|
436 | { return _hull; } |
---|
437 | |
---|
438 | const osg::Matrix & getProjectionMatrix( void ) const |
---|
439 | { return _projectionMatrix; } |
---|
440 | |
---|
441 | const osg::Matrix & getViewMatrix( void ) const |
---|
442 | { return _viewMatrix; } |
---|
443 | |
---|
444 | bool getUseLiSPSM() const |
---|
445 | { return _useLiSPSM; } |
---|
446 | |
---|
447 | void setUseLiSPSM( bool use ) |
---|
448 | { _useLiSPSM = use; } |
---|
449 | |
---|
450 | bool getUseFormula() const |
---|
451 | { return _useFormula; } |
---|
452 | |
---|
453 | void setUseFormula( bool use ) |
---|
454 | { _useFormula = use; } |
---|
455 | |
---|
456 | bool getUseOldFormula() const |
---|
457 | { return _useOldFormula; } |
---|
458 | |
---|
459 | void setUseOldFormula( bool use ) |
---|
460 | { _useOldFormula = use; } |
---|
461 | |
---|
462 | void setN(const double& n ) |
---|
463 | { _N = n; } |
---|
464 | |
---|
465 | const double getN() const |
---|
466 | { return _N; } |
---|
467 | |
---|
468 | |
---|
469 | const double getNearDist() const |
---|
470 | { return _nearDist; } |
---|
471 | |
---|
472 | void setNearDist( const double & nearDist ) |
---|
473 | { _nearDist = nearDist; } |
---|
474 | |
---|
475 | const double getFarDist() const |
---|
476 | { return _farDist; } |
---|
477 | |
---|
478 | void setFarDist( const double & farDist ) |
---|
479 | { _farDist = farDist; } |
---|
480 | |
---|
481 | const osg::Vec3d & getEyeDir() const |
---|
482 | { return _eyeDir; } |
---|
483 | |
---|
484 | const osg::Vec3d & getLightDir() const |
---|
485 | { return _lightDir; } |
---|
486 | |
---|
487 | void setEyeDir( const osg::Vec3d eyeDir ) |
---|
488 | { _eyeDir = eyeDir; } |
---|
489 | |
---|
490 | void setLightDir( const osg::Vec3d lightDir ) |
---|
491 | { _lightDir = lightDir; } |
---|
492 | |
---|
493 | protected: |
---|
494 | |
---|
495 | bool _useLiSPSM; |
---|
496 | bool _useFormula; |
---|
497 | bool _useOldFormula; |
---|
498 | double _N; |
---|
499 | double _nearDist; |
---|
500 | double _farDist; |
---|
501 | |
---|
502 | mutable osg::Vec3d _E; |
---|
503 | osg::Vec3d _eyeDir; |
---|
504 | osg::Vec3d _lightDir; |
---|
505 | |
---|
506 | ConvexPolyhedron _hull; |
---|
507 | |
---|
508 | osg::Matrix _viewMatrix; |
---|
509 | osg::Matrix _projectionMatrix; |
---|
510 | |
---|
511 | double getN(const osg::Matrix lightSpace, const osg::BoundingBox& B_ls) const; |
---|
512 | |
---|
513 | osg::Vec3d getNearCameraPointE() const; |
---|
514 | |
---|
515 | osg::Vec3d getZ0_ls |
---|
516 | (const osg::Matrix& lightSpace, const osg::Vec3d& e, const double& b_lsZmax, const osg::Vec3d& eyeDir) const; |
---|
517 | |
---|
518 | double calcNoptGeneral |
---|
519 | (const osg::Matrix lightSpace, const osg::BoundingBox& B_ls) const; |
---|
520 | |
---|
521 | double calcNoptOld |
---|
522 | ( const double gamma_ = 999) const; |
---|
523 | |
---|
524 | osg::Matrix getLispSmMtx |
---|
525 | (const osg::Matrix& lightSpace) const; |
---|
526 | |
---|
527 | osg::Vec3d getProjViewDir_ls |
---|
528 | (const osg::Matrix& lightSpace) const; |
---|
529 | |
---|
530 | void updateLightMtx |
---|
531 | (osg::Matrix& lightView, osg::Matrix& lightProj, const std::vector<osg::Vec3d>& B) const; |
---|
532 | |
---|
533 | public: |
---|
534 | LispSM( ) : _useLiSPSM( true ), _useFormula( true ), _useOldFormula( false ), _N( 1 ), _nearDist( 1 ), _farDist( 10 ) { } |
---|
535 | |
---|
536 | virtual void updateLightMtx( osg::Matrix& lightView, osg::Matrix& lightProj ) const; |
---|
537 | }; |
---|
538 | |
---|
539 | } |
---|
540 | |
---|
541 | osg::Vec3d LispSM::getNearCameraPointE( ) const |
---|
542 | { |
---|
543 | const osg::Matrix& eyeView = getViewMatrix(); |
---|
544 | |
---|
545 | ConvexPolyhedron::Vertices LVS; |
---|
546 | _hull.getPoints( LVS ); |
---|
547 | |
---|
548 | |
---|
549 | |
---|
550 | |
---|
551 | |
---|
552 | unsigned max = 0; |
---|
553 | for(unsigned i = 0; i < LVS.size(); i++) { |
---|
554 | |
---|
555 | LVS[i] = LVS[i] * eyeView; |
---|
556 | |
---|
557 | if( LVS[max].z() < LVS[i].z() ) { |
---|
558 | max = i; |
---|
559 | } |
---|
560 | } |
---|
561 | |
---|
562 | return LVS[max] * osg::Matrix::inverse( eyeView ); |
---|
563 | } |
---|
564 | |
---|
565 | |
---|
566 | |
---|
567 | osg::Vec3d LispSM::getZ0_ls |
---|
568 | (const osg::Matrix& lightSpace, const osg::Vec3d& e, const double& b_lsZmax, const osg::Vec3d& eyeDir) const |
---|
569 | { |
---|
570 | |
---|
571 | |
---|
572 | osg::Plane A(eyeDir,e); |
---|
573 | |
---|
574 | A.transform( lightSpace ); |
---|
575 | |
---|
576 | const osg::Vec3d e_ls = e * lightSpace; |
---|
577 | |
---|
578 | |
---|
579 | |
---|
580 | #if 1 |
---|
581 | osg::Vec3d v = osg::Vec3d(e_ls.x(),0,b_lsZmax); |
---|
582 | |
---|
583 | |
---|
584 | |
---|
585 | |
---|
586 | |
---|
587 | |
---|
588 | v.y() = -A.distance( v ) / A.getNormal().y(); |
---|
589 | #else |
---|
590 | |
---|
591 | const double d = A.asVec4()[3]; |
---|
592 | const osg::Vec3d n = A.getNormal(); |
---|
593 | osg::Vec3d v(e_ls.x(),(-d-n.z()*b_lsZmax-n.x()*e_ls.x())/n.y(),b_lsZmax); |
---|
594 | #endif |
---|
595 | |
---|
596 | return v; |
---|
597 | |
---|
598 | } |
---|
599 | |
---|
600 | double LispSM::calcNoptGeneral(const osg::Matrix lightSpace, const osg::BoundingBox& B_ls) const |
---|
601 | { |
---|
602 | const osg::Matrix& eyeView = getViewMatrix(); |
---|
603 | const osg::Matrix invLightSpace = osg::Matrix::inverse( lightSpace ); |
---|
604 | |
---|
605 | const osg::Vec3d z0_ls = getZ0_ls(lightSpace, _E,B_ls.zMax(),getEyeDir()); |
---|
606 | const osg::Vec3d z1_ls = osg::Vec3d(z0_ls.x(),z0_ls.y(),B_ls.zMin()); |
---|
607 | |
---|
608 | |
---|
609 | const osg::Vec4d z0_ws = osg::Vec4d( z0_ls, 1 ) * invLightSpace; |
---|
610 | const osg::Vec4d z1_ws = osg::Vec4d( z1_ls, 1 ) * invLightSpace; |
---|
611 | |
---|
612 | |
---|
613 | const osg::Vec4d z0_cs = z0_ws * eyeView; |
---|
614 | const osg::Vec4d z1_cs = z1_ws * eyeView; |
---|
615 | |
---|
616 | double z0 = -z0_cs.z() / z0_cs.w(); |
---|
617 | double z1 = -z1_cs.z() / z1_cs.w(); |
---|
618 | |
---|
619 | if( z1 / z0 <= 1.0 ) { |
---|
620 | |
---|
621 | |
---|
622 | |
---|
623 | |
---|
624 | |
---|
625 | |
---|
626 | osg::BoundingBox bb = _hull.computeBoundingBox( eyeView ); |
---|
627 | z0 = -bb.zMax(); |
---|
628 | if( z0 <= 0 ) |
---|
629 | z0 = 0.1; |
---|
630 | |
---|
631 | z1 = -bb.zMin(); |
---|
632 | if( z1 <= z0 ) |
---|
633 | z1 = z0 + 0.1; |
---|
634 | } |
---|
635 | |
---|
636 | const double d = osg::absolute(B_ls.zMax()-B_ls.zMin()); |
---|
637 | |
---|
638 | double N = d/( sqrt( z1 / z0 ) - 1.0 ); |
---|
639 | #if PRINT_COMPUTED_N_OPT |
---|
640 | std::cout |
---|
641 | << " N=" << std::setw(8) << N |
---|
642 | << " n=" << std::setw(8) << z0 |
---|
643 | << " f=" << std::setw(8) << z1 |
---|
644 | << "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b" |
---|
645 | << std::flush; |
---|
646 | #endif |
---|
647 | return N; |
---|
648 | } |
---|
649 | |
---|
650 | double LispSM::calcNoptOld( const double gamma_ ) const |
---|
651 | { |
---|
652 | const double& n = getNearDist(); |
---|
653 | const double& f = getFarDist(); |
---|
654 | const double d = abs(f-n); |
---|
655 | double sinGamma(0); |
---|
656 | if(999 == gamma_) { |
---|
657 | double dot = getEyeDir() * getLightDir(); |
---|
658 | sinGamma = sqrt( 1.0 - dot * dot ); |
---|
659 | } |
---|
660 | else { |
---|
661 | sinGamma = sin(gamma_); |
---|
662 | } |
---|
663 | |
---|
664 | double N = (n+sqrt(n*(n+d*sinGamma)))/sinGamma; |
---|
665 | #if PRINT_COMPUTED_N_OPT |
---|
666 | std::cout |
---|
667 | << " N=" << std::setw(8) << N |
---|
668 | << " n=" << std::setw(8) << n |
---|
669 | << " f=" << std::setw(8) << f |
---|
670 | << "\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b\b" |
---|
671 | << std::flush; |
---|
672 | #endif |
---|
673 | return N; |
---|
674 | } |
---|
675 | |
---|
676 | double LispSM::getN(const osg::Matrix lightSpace, const osg::BoundingBox& B_ls) const |
---|
677 | { |
---|
678 | if( getUseFormula()) { |
---|
679 | if( getUseOldFormula() ) |
---|
680 | return calcNoptOld(); |
---|
681 | else |
---|
682 | return calcNoptGeneral(lightSpace,B_ls); |
---|
683 | } |
---|
684 | else { |
---|
685 | return getN(); |
---|
686 | } |
---|
687 | } |
---|
688 | |
---|
689 | osg::Matrix LispSM::getLispSmMtx( const osg::Matrix& lightSpace ) const |
---|
690 | { |
---|
691 | const osg::BoundingBox B_ls = _hull.computeBoundingBox( lightSpace ); |
---|
692 | |
---|
693 | const double n = getN(lightSpace,B_ls); |
---|
694 | |
---|
695 | |
---|
696 | const osg::Vec3d e_ls = _E * lightSpace; |
---|
697 | |
---|
698 | const osg::Vec3d Cstart_lp(e_ls.x(),e_ls.y(),B_ls.zMax()); |
---|
699 | |
---|
700 | if( n >= OSG_INFINITY ) { |
---|
701 | |
---|
702 | return osg::Matrix::identity(); |
---|
703 | } |
---|
704 | |
---|
705 | |
---|
706 | |
---|
707 | const osg::Vec3d C( Cstart_lp + osg::Vec3d(0,0,1) * n ); |
---|
708 | |
---|
709 | const osg::Matrix projectionCenter = osg::Matrix::translate( -C ); |
---|
710 | |
---|
711 | |
---|
712 | const double d = osg::absolute(B_ls.zMax()-B_ls.zMin()); |
---|
713 | |
---|
714 | |
---|
715 | |
---|
716 | |
---|
717 | |
---|
718 | |
---|
719 | |
---|
720 | osg::Matrix P = osg::Matrix::frustum( -1.0,1.0,-1.0,1.0, n, n+d ); |
---|
721 | |
---|
722 | |
---|
723 | |
---|
724 | |
---|
725 | P = P * osg::Matrix::scale( 1.0,1.0,-1.0 ); |
---|
726 | |
---|
727 | return projectionCenter * P; |
---|
728 | } |
---|
729 | |
---|
730 | osg::Vec3d LispSM::getProjViewDir_ls(const osg::Matrix& lightSpace ) const { |
---|
731 | |
---|
732 | const osg::Vec3d e = _E; |
---|
733 | |
---|
734 | const osg::Vec3d b = e+getEyeDir(); |
---|
735 | |
---|
736 | osg::Vec4d e_lp = osg::Vec4d( e, 1.0 ) * lightSpace; |
---|
737 | osg::Vec4d b_lp = osg::Vec4d( b, 1.0 ) * lightSpace; |
---|
738 | |
---|
739 | if( e_lp[3] <= 0 ) |
---|
740 | { |
---|
741 | e_lp[3] = e_lp[3]; |
---|
742 | } |
---|
743 | |
---|
744 | if( b_lp[3] <= 0 ) |
---|
745 | { |
---|
746 | osg::Vec4d v = (e_lp - b_lp)/(e_lp[3]-b_lp[3]); |
---|
747 | |
---|
748 | v = ( e_lp + v ) * 0.5; |
---|
749 | |
---|
750 | b_lp = v; |
---|
751 | } |
---|
752 | |
---|
753 | osg::Vec3d projDir( osg::Vec3( b_lp[0], b_lp[1], b_lp[2] ) / b_lp[3] - |
---|
754 | osg::Vec3( e_lp[0], e_lp[1], e_lp[2] ) / e_lp[3] ); |
---|
755 | |
---|
756 | projDir.normalize(); |
---|
757 | |
---|
758 | |
---|
759 | projDir.y() = 0.0; |
---|
760 | return projDir; |
---|
761 | } |
---|
762 | |
---|
763 | void LispSM::updateLightMtx |
---|
764 | ( osg::Matrix& lightView, osg::Matrix& lightProj ) const |
---|
765 | { |
---|
766 | |
---|
767 | |
---|
768 | |
---|
769 | |
---|
770 | |
---|
771 | |
---|
772 | |
---|
773 | if( _hull._faces.empty() ) { |
---|
774 | |
---|
775 | return; |
---|
776 | } |
---|
777 | |
---|
778 | _E = getNearCameraPointE(); |
---|
779 | |
---|
780 | lightProj = lightProj * osg::Matrix::scale( 1, 1, -1 ); |
---|
781 | |
---|
782 | |
---|
783 | osg::Matrix switchToArticle = osg::Matrix::identity(); |
---|
784 | switchToArticle(1,1) = 0.0; |
---|
785 | switchToArticle(1,2) =-1.0; |
---|
786 | switchToArticle(2,1) = 1.0; |
---|
787 | switchToArticle(2,2) = 0.0; |
---|
788 | |
---|
789 | lightProj = lightProj * switchToArticle; |
---|
790 | |
---|
791 | osg::Matrix L = lightView * lightProj; |
---|
792 | |
---|
793 | osg::Vec3d projViewDir = getProjViewDir_ls(L); |
---|
794 | |
---|
795 | if( getUseLiSPSM() ) { |
---|
796 | |
---|
797 | |
---|
798 | |
---|
799 | |
---|
800 | lightProj = lightProj * |
---|
801 | osg::Matrix::lookAt( osg::Vec3d(0,0,0), projViewDir, osg::Vec3d(0,1,0) ); |
---|
802 | |
---|
803 | osg::Matrix lispsm = getLispSmMtx( lightView * lightProj ); |
---|
804 | lightProj = lightProj * lispsm; |
---|
805 | } |
---|
806 | |
---|
807 | const osg::Matrix PL = lightView * lightProj; |
---|
808 | |
---|
809 | osg::BoundingBox bb = _hull.computeBoundingBox( PL ); |
---|
810 | |
---|
811 | osg::Matrix fitToUnitFrustum; |
---|
812 | fitToUnitFrustum.makeOrtho( bb._min[0], bb._max[0], |
---|
813 | bb._min[1], bb._max[1], |
---|
814 | -bb._max[2], -bb._min[2] ); |
---|
815 | |
---|
816 | |
---|
817 | lightProj = lightProj * fitToUnitFrustum; |
---|
818 | |
---|
819 | |
---|
820 | osg::Matrix switchToGL = osg::Matrix::identity(); |
---|
821 | switchToGL(1,1) = 0.0; |
---|
822 | switchToGL(1,2) = 1.0; |
---|
823 | switchToGL(2,1) = -1.0; |
---|
824 | switchToGL(2,2) = 0.0; |
---|
825 | |
---|
826 | |
---|
827 | lightProj = lightProj * switchToGL; |
---|
828 | |
---|
829 | lightProj = lightProj * osg::Matrix::scale(1.0,1.0,-1.0); |
---|
830 | } |
---|
831 | |
---|
832 | void LightSpacePerspectiveShadowMapAlgorithm::operator() |
---|
833 | ( const osgShadow::ConvexPolyhedron* hullShadowedView, |
---|
834 | const osg::Camera* cameraMain, |
---|
835 | osg::Camera* cameraShadow ) const |
---|
836 | { |
---|
837 | lispsm->setHull( *hullShadowedView ); |
---|
838 | lispsm->setViewMatrix( cameraMain->getViewMatrix() ); |
---|
839 | lispsm->setProjectionMatrix( cameraMain->getViewMatrix() ); |
---|
840 | |
---|
841 | #if 1 |
---|
842 | osg::Vec3d lightDir = osg::Matrix::transform3x3( osg::Vec3d( 0, 0, -1 ), osg::Matrix::inverse( cameraShadow->getViewMatrix() ) ); |
---|
843 | osg::Vec3d eyeDir = osg::Matrix::transform3x3( osg::Vec3d( 0, 0, -1 ), osg::Matrix::inverse( cameraMain->getViewMatrix() ) ); |
---|
844 | |
---|
845 | #else |
---|
846 | |
---|
847 | osg::Vec3d lightDir = osg::Matrix::transform3x3( cameraShadow->getViewMatrix(), osg::Vec3d( 0.0, 0.0, -1.0 ) ); |
---|
848 | osg::Vec3d eyeDir = osg::Matrix::transform3x3( cameraMain->getViewMatrix(), osg::Vec3d( 0.0, 0.0, -1.0 ) ); |
---|
849 | |
---|
850 | #endif |
---|
851 | |
---|
852 | lightDir.normalize(); |
---|
853 | eyeDir.normalize(); |
---|
854 | |
---|
855 | lispsm->setLightDir(lightDir); |
---|
856 | |
---|
857 | |
---|
858 | osg::Matrix &proj = cameraShadow->getProjectionMatrix(); |
---|
859 | double l,r,b,t,n,f; |
---|
860 | if( proj.getOrtho( l,r,b,t,n,f ) ) |
---|
861 | { |
---|
862 | osg::Vec3d camPosInLightSpace = |
---|
863 | osg::Vec3d( 0, 0, 0 ) * |
---|
864 | osg::Matrix::inverse( cameraMain->getViewMatrix() ) * |
---|
865 | cameraShadow->getViewMatrix() * |
---|
866 | cameraShadow->getProjectionMatrix(); |
---|
867 | } |
---|
868 | |
---|
869 | eyeDir.normalize(); |
---|
870 | |
---|
871 | lispsm->setEyeDir( eyeDir ); |
---|
872 | |
---|
873 | osg::BoundingBox bb = |
---|
874 | hullShadowedView->computeBoundingBox( cameraMain->getViewMatrix() ); |
---|
875 | |
---|
876 | lispsm->setNearDist( -bb.zMax() ); |
---|
877 | lispsm->setFarDist( -bb.zMin() ); |
---|
878 | |
---|
879 | lispsm->updateLightMtx |
---|
880 | ( cameraShadow->getViewMatrix(), cameraShadow->getProjectionMatrix() ); |
---|
881 | } |
---|
882 | |
---|
883 | LightSpacePerspectiveShadowMapAlgorithm::LightSpacePerspectiveShadowMapAlgorithm() |
---|
884 | { |
---|
885 | lispsm = new LispSM; |
---|
886 | } |
---|
887 | |
---|
888 | LightSpacePerspectiveShadowMapAlgorithm::~LightSpacePerspectiveShadowMapAlgorithm() |
---|
889 | { |
---|
890 | delete lispsm; |
---|
891 | } |
---|
892 | |
---|
893 | |
---|
894 | #endif |
---|