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OgreShadowCameraSetupFocused.cpp @ 50

Last change on this file since 50 was 5, checked in by anonymous, 18 years ago
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1	/*
2	-----------------------------------------------------------------------------
3	This source file is part of OGRE
4	(Object-oriented Graphics Rendering Engine)
5	For the latest info, see http://www.ogre3d.org/
6
7	Copyright (c) 2006 Torus Knot Software Ltd
8	Copyright (c) 2006 Matthias Fink, netAllied GmbH <matthias.fink@web.de>
9	Also see acknowledgements in Readme.html
10
11	This program is free software; you can redistribute it and/or modify it under
12	the terms of the GNU Lesser General Public License as published by the Free Software
13	Foundation; either version 2 of the License, or (at your option) any later
14	version.
15
16	This program is distributed in the hope that it will be useful, but WITHOUT
17	ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
18	FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
19
20	You should have received a copy of the GNU Lesser General Public License along with
21	this program; if not, write to the Free Software Foundation, Inc., 59 Temple
22	Place - Suite 330, Boston, MA 02111-1307, USA, or go to
23	http://www.gnu.org/copyleft/lesser.txt.
24
25	You may alternatively use this source under the terms of a specific version of
26	the OGRE Unrestricted License provided you have obtained such a license from
27	Torus Knot Software Ltd.
28	-----------------------------------------------------------------------------
29	*/
30
31	#include "OgreStableHeaders.h"
32	#include "OgreShadowCameraSetupFocused.h"
33	#include "OgreRoot.h"
34	#include "OgreSceneManager.h"
35	#include "OgreCamera.h"
36	#include "OgreLight.h"
37	#include "OgrePlane.h"
38	#include "OgreLogManager.h"
39
40
41	namespace Ogre
42	{
43	/** transform from normal to light space */
44	const Matrix4 FocusedShadowCameraSetup::msNormalToLightSpace(
45	1, 0, 0, 0, // x
46	0, 0, -1, 0, // y
47	0, 1, 0, 0, // z
48	0, 0, 0, 1); // w
49	/** transform from light to normal space */
50	const Matrix4 FocusedShadowCameraSetup::msLightSpaceToNormal(
51	1, 0, 0, 0, // x
52	0, 0, 1, 0, // y
53	0, -1, 0, 0, // z
54	0, 0, 0, 1); // w
55
56	FocusedShadowCameraSetup::FocusedShadowCameraSetup(void)
57	: mTempFrustum(new Frustum())
58	, mLightFrustumCamera(new Camera("TEMP LIGHT INTERSECT CAM", NULL))
59	, mLightFrustumCameraCalculated(false)
60	, mUseAggressiveRegion(true)
61	{
62	mTempFrustum->setProjectionType(PT_PERSPECTIVE);
63	}
64	//-----------------------------------------------------------------------
65	FocusedShadowCameraSetup::~FocusedShadowCameraSetup(void)
66	{
67	delete mTempFrustum;
68	delete mLightFrustumCamera;
69	}
70	//-----------------------------------------------------------------------
71	void FocusedShadowCameraSetup::calculateShadowMappingMatrix(const SceneManager& sm,
72	const Camera& cam, const Light& light, Matrix4 out_view, Matrix4 out_proj,
73	Camera *out_cam) const
74	{
75	const Vector3& camDir = cam.getDerivedDirection();
76
77	// get the shadow frustum's far distance
78	Real shadowDist = sm.getShadowFarDistance();
79	if (!shadowDist)
80	{
81	// need a shadow distance, make one up
82	shadowDist = cam.getNearClipDistance() * 3000;
83	}
84	Real shadowOffset = shadowDist * sm.getShadowDirLightTextureOffset();
85
86
87	if (light.getType() == Light::LT_DIRECTIONAL)
88	{
89	// generate view matrix if requested
90	if (out_view != NULL)
91	{
92	*out_view = buildViewMatrix(cam.getDerivedPosition(),
93	-light.getDerivedDirection(),
94	camDir);
95	}
96
97	// generate projection matrix if requested
98	if (out_proj != NULL)
99	{
100	*out_proj = Matrix4::IDENTITY;
101	}
102
103	// set up camera if requested
104	if (out_cam != NULL)
105	{
106	out_cam->setProjectionType(PT_ORTHOGRAPHIC);
107	out_cam->setDirection(light.getDerivedDirection());
108	out_cam->setPosition(cam.getDerivedPosition());
109	out_cam->setFOVy(Degree(90));
110	out_cam->setNearClipDistance(shadowOffset);
111	}
112	}
113	else if (light.getType() == Light::LT_POINT)
114	{
115	// target analogue to the default shadow textures
116	// Calculate look at position
117	// We want to look at a spot shadowOffset away from near plane
118	// 0.5 is a little too close for angles
119	Vector3 target = cam.getDerivedPosition() +
120	(cam.getDerivedDirection() * shadowOffset);
121	Vector3 lightDir = target - light.getDerivedPosition();
122	lightDir.normalise();
123
124	// generate view matrix if requested
125	if (out_view != NULL)
126	{
127	*out_view = buildViewMatrix(light.getDerivedPosition(),
128	lightDir,
129	camDir);
130	}
131
132	// generate projection matrix if requested
133	if (out_proj != NULL)
134	{
135	// set FOV to 120 degrees
136	mTempFrustum->setFOVy(Degree(120));
137
138	// set near clip distance like the camera
139	mTempFrustum->setNearClipDistance(cam.getNearClipDistance());
140
141	*out_proj = mTempFrustum->getProjectionMatrix();
142	}
143
144	// set up camera if requested
145	if (out_cam != NULL)
146	{
147	out_cam->setProjectionType(PT_PERSPECTIVE);
148	out_cam->setDirection(lightDir);
149	out_cam->setPosition(light.getDerivedPosition());
150	out_cam->setFOVy(Degree(120));
151	out_cam->setNearClipDistance(cam.getNearClipDistance());
152	}
153	}
154	else if (light.getType() == Light::LT_SPOTLIGHT)
155	{
156	// generate view matrix if requested
157	if (out_view != NULL)
158	{
159	*out_view = buildViewMatrix(light.getDerivedPosition(),
160	light.getDerivedDirection(),
161	camDir);
162	}
163
164	// generate projection matrix if requested
165	if (out_proj != NULL)
166	{
167	// set FOV slightly larger than spotlight range
168	mTempFrustum->setFOVy(light.getSpotlightOuterAngle() * 1.2);
169
170	// set near clip distance like the camera
171	mTempFrustum->setNearClipDistance(cam.getNearClipDistance());
172
173	*out_proj = mTempFrustum->getProjectionMatrix();
174	}
175
176	// set up camera if requested
177	if (out_cam != NULL)
178	{
179	out_cam->setProjectionType(PT_PERSPECTIVE);
180	out_cam->setDirection(light.getDerivedDirection());
181	out_cam->setPosition(light.getDerivedPosition());
182	out_cam->setFOVy(light.getSpotlightOuterAngle() * 1.2);
183	out_cam->setNearClipDistance(cam.getNearClipDistance());
184	}
185	}
186	}
187	//-----------------------------------------------------------------------
188	void FocusedShadowCameraSetup::calculateB(const SceneManager& sm, const Camera& cam,
189	const Light& light, const AxisAlignedBox& sceneBB, PointListBody *out_bodyB) const
190	{
191	OgreAssert(out_bodyB != NULL, "bodyB vertex list is NULL");
192
193	/// perform convex intersection of the form B = ((V \cap S) + l) \cap S \cap L
194
195	// get V
196	mBodyB.define(cam);
197
198	if (light.getType() != Light::LT_DIRECTIONAL)
199	{
200	// clip bodyB with sceneBB
201	/* Note, Matthias' original code states this:
202	"The procedure ((V \cap S) + l) \cap S \cap L (Wimmer et al.) leads in some
203	cases to disappearing shadows. Valid parts of the scene are clipped, so shadows
204	are partly incomplete. The cause may be the transformation into light space that
205	is only done for the corner points which may not contain the whole scene afterwards
206	any more. So we fall back to the method of Stamminger et al. (V + l) \cap S \cap L
207	which does not show these anomalies."
208
209	.. leading to the commenting out of the below clip. However, ift makes a major
210	difference to the quality of the focus, and so far I haven't noticed
211	the clipping issues described. Intuitively I would have thought that
212	any clipping issue would be due to the findCastersForLight not being
213	quite right, since if the sceneBB includes those there is no reason for
214	this clip instruction to omit a genuine shadow caster.
215
216	I have made this a user option since the quality effect is major and
217	the clipping problem only seems to occur in some specific cases.
218	*/
219	if (mUseAggressiveRegion)
220	mBodyB.clip(sceneBB);
221
222	// form a convex hull of bodyB with the light position
223	mBodyB.extend(light.getDerivedPosition());
224
225	// clip bodyB with sceneBB
226	mBodyB.clip(sceneBB);
227
228	// clip with the light frustum
229	// set up light camera to clip with the resulting frustum planes
230	if (!mLightFrustumCameraCalculated)
231	{
232	calculateShadowMappingMatrix(sm, cam, light, NULL, NULL, mLightFrustumCamera);
233	mLightFrustumCameraCalculated = true;
234	}
235	mBodyB.clip(*mLightFrustumCamera);
236
237	// extract bodyB vertices
238	out_bodyB->build(mBodyB);
239
240	}
241	else
242	{
243	// clip bodyB with sceneBB
244	mBodyB.clip(sceneBB);
245
246	// Also clip based on shadow far distance if appropriate
247	Real farDist = sm.getShadowFarDistance();
248	if (farDist)
249	{
250	Vector3 pointOnPlane = cam.getDerivedPosition() +
251	(cam.getDerivedDirection() * farDist);
252	Plane p(cam.getDerivedDirection(), pointOnPlane);
253	mBodyB.clip(p);
254	}
255
256	// Extrude the intersection bodyB into the inverted light direction and store
257	// the info in the point list.
258	// The sceneBB holds the maximum extent of the extrusion.
259	out_bodyB->buildAndIncludeDirection(mBodyB,
260	sceneBB,
261	-light.getDerivedDirection());
262	}
263	}
264
265	//-----------------------------------------------------------------------
266	void FocusedShadowCameraSetup::calculateLVS(const SceneManager& sm, const Camera& cam,
267	const Light& light, const AxisAlignedBox& sceneBB, PointListBody *out_LVS) const
268	{
269	ConvexBody bodyLVS;
270
271	// init body with view frustum
272	bodyLVS.define(cam);
273
274	// clip the body with the light frustum (point + spot)
275	// for a directional light the space of the intersected
276	// view frustum and sceneBB is always lighted and in front
277	// of the viewer.
278	if (light.getType() != Light::LT_DIRECTIONAL)
279	{
280	// clip with the light frustum
281	// set up light camera to clip the resulting frustum
282	if (!mLightFrustumCameraCalculated)
283	{
284	calculateShadowMappingMatrix(sm, cam, light, NULL, NULL, mLightFrustumCamera);
285	mLightFrustumCameraCalculated = true;
286	}
287	bodyLVS.clip(*mLightFrustumCamera);
288	}
289
290	// clip the body with the scene bounding box
291	bodyLVS.clip(sceneBB);
292
293	// extract bodyLVS vertices
294	out_LVS->build(bodyLVS);
295	}
296	//-----------------------------------------------------------------------
297	Vector3 FocusedShadowCameraSetup::getLSProjViewDir(const Matrix4& lightSpace,
298	const Camera& cam, const PointListBody& bodyLVS) const
299	{
300	// goal is to construct a view direction
301	// because parallel lines are not parallel any more after perspective projection we have to transform
302	// a ray to point us the viewing direction
303
304	// fetch a point near the camera
305	const Vector3 e_world = getNearCameraPoint_ws(cam.getViewMatrix(), bodyLVS);
306
307	// plus the direction results in a second point
308	const Vector3 b_world = e_world + cam.getDerivedDirection();
309
310	// transformation into light space
311	const Vector3 e_ls = lightSpace * e_world;
312	const Vector3 b_ls = lightSpace * b_world;
313
314	// calculate the projection direction, which is the subtraction of
315	// b_ls from e_ls. The y component is set to 0 to project the view
316	// direction into the shadow map plane.
317	Vector3 projectionDir(b_ls - e_ls);
318	projectionDir.y = 0;
319	projectionDir.normalise();
320
321	return projectionDir;
322	}
323	//-----------------------------------------------------------------------
324	Vector3 FocusedShadowCameraSetup::getNearCameraPoint_ws(const Matrix4& viewMatrix,
325	const PointListBody& bodyLVS) const
326	{
327	if (bodyLVS.getPointCount() == 0)
328	return Vector3(0,0,0);
329
330	Vector3 nearEye = viewMatrix * bodyLVS.getPoint(0), // for comparison
331	nearWorld = bodyLVS.getPoint(0); // represents the final point
332
333	// store the vertex with the highest z-value which is the nearest point
334	for (size_t i = 1; i < bodyLVS.getPointCount(); ++i)
335	{
336	const Vector3& vWorld = bodyLVS.getPoint(i);
337
338	// comparison is done from the viewer
339	Vector3 vEye = viewMatrix * vWorld;
340
341	if (vEye.z > nearEye.z)
342	{
343	nearEye = vEye;
344	nearWorld = vWorld;
345	}
346	}
347
348	return nearWorld;
349	}
350	//-----------------------------------------------------------------------
351	Matrix4 FocusedShadowCameraSetup::transformToUnitCube(const Matrix4& m,
352	const PointListBody& body) const
353	{
354	// map the transformed body AAB points to the unit cube (-1/-1/-1) / (+1/+1/+1) corners
355	AxisAlignedBox aab_trans;
356
357	for (size_t i = 0; i < body.getPointCount(); ++i)
358	{
359	aab_trans.merge(m * body.getPoint(i));
360	}
361
362	Vector3 vMin, vMax;
363
364	vMin = aab_trans.getMinimum();
365	vMax = aab_trans.getMaximum();
366
367	const Vector3 trans(-(vMax.x + vMin.x) / (vMax.x - vMin.x),
368	-(vMax.y + vMin.y) / (vMax.y - vMin.y),
369	-(vMax.z + vMin.z) / (vMax.z - vMin.z));
370
371	const Vector3 scale(2 / (vMax.x - vMin.x),
372	2 / (vMax.y - vMin.y),
373	2 / (vMax.z - vMin.z));
374
375	Matrix4 mOut(Matrix4::IDENTITY);
376	mOut.setTrans(trans);
377	mOut.setScale(scale);
378
379	return mOut;
380	}
381	//-----------------------------------------------------------------------
382	Matrix4 FocusedShadowCameraSetup::buildViewMatrix(const Vector3& pos, const Vector3& dir,
383	const Vector3& up) const
384	{
385	Vector3 xN = dir.crossProduct(up);
386	xN.normalise();
387	Vector3 upN = xN.crossProduct(dir);
388	upN.normalise();
389
390	Matrix4 m(xN.x, xN.y, xN.z, -xN.dotProduct(pos),
391	upN.x, upN.y, upN.z, -upN.dotProduct(pos),
392	-dir.x, -dir.y, -dir.z, dir.dotProduct(pos),
393	0.0, 0.0, 0.0, 1.0
394	);
395
396	return m;
397	}
398	//-----------------------------------------------------------------------
399	void FocusedShadowCameraSetup::getShadowCamera (const SceneManager sm, const Camera cam,
400	const Viewport vp, const Light light, Camera *texCam) const
401	{
402	// check availability - viewport not needed
403	OgreAssert(sm != NULL, "SceneManager is NULL");
404	OgreAssert(cam != NULL, "Camera (viewer) is NULL");
405	OgreAssert(light != NULL, "Light is NULL");
406	OgreAssert(texCam != NULL, "Camera (texture) is NULL");
407	mLightFrustumCameraCalculated = false;
408
409	// calculate standard shadow mapping matrix
410	Matrix4 LView, LProj;
411	calculateShadowMappingMatrix(sm, cam, *light, &LView, &LProj, NULL);
412
413	// build scene bounding box
414	const VisibleObjectsBoundsInfo& visInfo = sm->getShadowCasterBoundsInfo(light);
415	AxisAlignedBox sceneBB = visInfo.aabb;
416	sceneBB.merge(sm->getVisibleObjectsBoundsInfo(cam).aabb);
417	sceneBB.merge(cam->getDerivedPosition());
418
419	// in case the sceneBB is empty (e.g. nothing visible to the cam) simply
420	// return the standard shadow mapping matrix
421	if (sceneBB.isNull())
422	{
423	texCam->setCustomViewMatrix(true, LView);
424	texCam->setCustomProjectionMatrix(true, LProj);
425	return;
426	}
427
428	// calculate the intersection body B
429	mPointListBodyB.reset();
430	calculateB(sm, cam, *light, sceneBB, &mPointListBodyB);
431
432	// in case the bodyB is empty (e.g. nothing visible to the light or the cam)
433	// simply return the standard shadow mapping matrix
434	if (mPointListBodyB.getPointCount() == 0)
435	{
436	texCam->setCustomViewMatrix(true, LView);
437	texCam->setCustomProjectionMatrix(true, LProj);
438	return;
439	}
440
441	// transform to light space: y -> -z, z -> y
442	LProj = msNormalToLightSpace * LProj;
443
444	// calculate LVS so it does not need to be calculated twice
445	// calculate the body L \cap V \cap S to make sure all returned points are in
446	// front of the camera
447	mPointListBodyLVS.reset();
448	calculateLVS(sm, cam, *light, sceneBB, &mPointListBodyLVS);
449
450	// fetch the viewing direction
451	const Vector3 viewDir = getLSProjViewDir(LProj * LView, *cam, mPointListBodyLVS);
452
453	// The light space will be rotated in such a way, that the projected light view
454	// always points upwards, so the up-vector is the y-axis (we already prepared the
455	// light space for this usage).The transformation matrix is set up with the
456	// following parameters:
457	// - position is the origin
458	// - the view direction is the calculated viewDir
459	// - the up vector is the y-axis
460	LProj = buildViewMatrix(Vector3::ZERO, viewDir, Vector3::UNIT_Y) * LProj;
461
462	// map bodyB to unit cube
463	LProj = transformToUnitCube(LProj * LView, mPointListBodyB) * LProj;
464
465	// transform from light space to normal space: y -> z, z -> -y
466	LProj = msLightSpaceToNormal * LProj;
467
468	// set the two custom matrices
469	texCam->setCustomViewMatrix(true, LView);
470	texCam->setCustomProjectionMatrix(true, LProj);
471	}
472
473	//---------------------------------------------------------------------
474	//---------------------------------------------------------------------
475	//-----------------------------------------------------------------------
476	FocusedShadowCameraSetup::PointListBody::PointListBody()
477	{
478	// Preallocate some space
479	mBodyPoints.reserve(12);
480	}
481	//-----------------------------------------------------------------------
482	FocusedShadowCameraSetup::PointListBody::PointListBody(const ConvexBody& body)
483	{
484	build(body);
485	}
486	//-----------------------------------------------------------------------
487	FocusedShadowCameraSetup::PointListBody::~PointListBody()
488	{
489	}
490	//-----------------------------------------------------------------------
491	void FocusedShadowCameraSetup::PointListBody::merge(const PointListBody& plb)
492	{
493	size_t size = plb.getPointCount();
494	for (size_t i = 0; i < size; ++i)
495	{
496	this->addPoint(plb.getPoint(i));
497	}
498	}
499	//-----------------------------------------------------------------------
500	void FocusedShadowCameraSetup::PointListBody::build(const ConvexBody& body, bool filterDuplicates)
501	{
502	// erase list
503	mBodyPoints.clear();
504
505	// Try to reserve a representative amount of memory
506	mBodyPoints.reserve(body.getPolygonCount() * 6);
507
508	// build new list
509	for (size_t i = 0; i < body.getPolygonCount(); ++i)
510	{
511	for (size_t j = 0; j < body.getVertexCount(i); ++j)
512	{
513	const Vector3 &vInsert = body.getVertex(i, j);
514
515	// duplicates allowed?
516	if (filterDuplicates)
517	{
518	bool bPresent = false;
519
520	for(Polygon::VertexList::iterator vit = mBodyPoints.begin();
521	vit != mBodyPoints.end(); ++vit)
522	{
523	const Vector3& v = *vit;
524
525	if (vInsert.positionEquals(v))
526	{
527	bPresent = true;
528	break;
529	}
530	}
531
532	if (bPresent == false)
533	{
534	mBodyPoints.push_back(body.getVertex(i, j));
535	}
536	}
537
538	// else insert directly
539	else
540	{
541	mBodyPoints.push_back(body.getVertex(i, j));
542	}
543	}
544	}
545
546	// update AAB
547	// no points altered, so take body AAB
548	mAAB = body.getAABB();
549	}
550	//-----------------------------------------------------------------------
551	void FocusedShadowCameraSetup::PointListBody::buildAndIncludeDirection(
552	const ConvexBody& body, const AxisAlignedBox& aabMax, const Vector3& dir)
553	{
554	// reset point list
555	this->reset();
556
557	// intersect the rays formed by the points in the list with the given direction and
558	// insert them into the list
559
560	// min/max aab points for comparison
561	const Vector3& min = aabMax.getMinimum();
562	const Vector3& max = aabMax.getMaximum();
563
564	// assemble the clipping planes
565	Plane pl[6];
566
567	// front
568	pl[0].redefine(Vector3::UNIT_Z, max);
569	// back
570	pl[1].redefine(Vector3::NEGATIVE_UNIT_Z, min);
571	// left
572	pl[2].redefine(Vector3::NEGATIVE_UNIT_X, min);
573	// right
574	pl[3].redefine(Vector3::UNIT_X, max);
575	// bottom
576	pl[4].redefine(Vector3::NEGATIVE_UNIT_Y, min);
577	// top
578	pl[5].redefine(Vector3::UNIT_Y, max);
579
580
581	const size_t polyCount = body.getPolygonCount();
582	for (size_t iPoly = 0; iPoly < polyCount; ++iPoly)
583	{
584
585	// store the old inserted point and plane info
586	// if the currently processed point hits a different plane than the previous point an
587	// intersection point is calculated that lies on the two planes' intersection edge
588
589	// fetch current polygon
590	const Polygon& p = body.getPolygon(iPoly);
591
592	size_t pointCount = p.getVertexCount();
593	for (size_t iPoint = 0; iPoint < pointCount ; ++iPoint)
594	{
595	// base point
596	const Vector3& pt = p.getVertex(iPoint);
597
598	// add the base point
599	this->addPoint(pt);
600
601	// intersection ray
602	Ray ray(pt, dir);
603
604	// intersect with each plane
605	for (size_t iPlane = 0; iPlane < 6; ++iPlane)
606	{
607	std::pair< bool, Real > intersect = ray.intersects(pl[ iPlane ]);
608
609	const Vector3 ptIntersect = ray.getPoint(intersect.second);
610
611	// intersection point must exist (first) and the point distance must be greater than null (second)
612	// in case of distance null the intersection point equals the base point
613	if (intersect.first && intersect.second > 0)
614	{
615	if (ptIntersect.x < max.x + 1e-3f && ptIntersect.x > min.x - 1e-3f &&
616	ptIntersect.y < max.y + 1e-3f && ptIntersect.y > min.y - 1e-3f &&
617	ptIntersect.z < max.z + 1e-3f && ptIntersect.z > min.z - 1e-3f)
618	{
619	// in case the point lies on the boundary, continue and see if there is another plane that intersects
620	if (pt.positionEquals(ptIntersect))
621	{
622	continue;
623	}
624
625	// add intersection point
626	this->addPoint(ptIntersect);
627	}
628
629	} // if: intersection available
630
631	} // for: plane intersection
632
633	} // for: polygon point iteration
634
635	} // for: polygon iteration
636	}
637	//-----------------------------------------------------------------------
638	const AxisAlignedBox& FocusedShadowCameraSetup::PointListBody::getAAB(void) const
639	{
640	return mAAB;
641	}
642	//-----------------------------------------------------------------------
643	void FocusedShadowCameraSetup::PointListBody::addPoint(const Vector3& point)
644	{
645	// dont check for doubles, simply add
646	mBodyPoints.push_back(point);
647
648	// update AAB
649	mAAB.merge(point);
650	}
651	//-----------------------------------------------------------------------
652	void FocusedShadowCameraSetup::PointListBody::addAAB(const AxisAlignedBox& aab)
653	{
654	const Vector3& min = aab.getMinimum();
655	const Vector3& max = aab.getMaximum();
656
657	Vector3 currentVertex = min;
658	// min min min
659	addPoint(currentVertex);
660
661	// min min max
662	currentVertex.z = max.z;
663	addPoint(currentVertex);
664
665	// min max max
666	currentVertex.y = max.y;
667	addPoint(currentVertex);
668
669	// min max min
670	currentVertex.z = min.z;
671	addPoint(currentVertex);
672
673	// max max min
674	currentVertex.x = max.x;
675	addPoint(currentVertex);
676
677	// max max max
678	currentVertex.z = max.z;
679	addPoint(currentVertex);
680
681	// max min max
682	currentVertex.y = min.y;
683	addPoint(currentVertex);
684
685	// max min min
686	currentVertex.z = min.z;
687	addPoint(currentVertex);
688
689	}
690	//-----------------------------------------------------------------------
691	const Vector3& FocusedShadowCameraSetup::PointListBody::getPoint(size_t cnt) const
692	{
693	OgreAssert(cnt >= 0 && cnt < getPointCount(), "Search position out of range");
694
695	return mBodyPoints[ cnt ];
696	}
697	//-----------------------------------------------------------------------
698	size_t FocusedShadowCameraSetup::PointListBody::getPointCount(void) const
699	{
700	return mBodyPoints.size();
701	}
702	//-----------------------------------------------------------------------
703	void FocusedShadowCameraSetup::PointListBody::reset(void)
704	{
705	mBodyPoints.clear();
706	mAAB.setNull();
707	}
708
709	}
710
711

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source: downloads/ogre/OgreMain/src/OgreShadowCameraSetupFocused.cpp @ 50

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