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source: GTP/trunk/App/Demos/Vis/HillyTerrain/OGRE/TestCullingTerrainApplication.cpp @ 2359

Revision 2359, 23.4 KB checked in by mattausch, 17 years ago (diff)

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1	#include <OgreNoMemoryMacros.h>
2	#include <CEGUI/CEGUI.h>
3	#include <../CEGUIRenderer/include/OgreCEGUIRenderer.h>
4	#include <../CEGUIRenderer/include/OgreCEGUIResourceProvider.h>
5	#include <../CEGUIRenderer/include/OgreCEGUITexture.h>
6	#include <OgreMemoryMacros.h>
7	#include <OgreIteratorWrappers.h>
8	#include <Ogre.h>
9	#include "TestCullingTerrainApplication.h"
10	#include "TerrainFrameListener.h"
11
12	#if COLLADA
13	#include "OgreColladaPrerequisites.h"
14	#include "OgreColladaDocument.h"
15	#include "OgreColladaScene.h"
16	#endif
17
18	#include "IVReader.h"
19
20	#define WIN32_LEAN_AND_MEAN
21	#include <windows.h>
22
23	const static bool USE_STATIC_GEOMETRY = false;
24	bool TestCullingTerrainApplication::msShowHillyTerrain = false;
25
26
27	//using namespace GtpVisibility;
28
29	/*************************************************************/
30	/* EntityState implementation */
31	/*************************************************************/
32
33
34	Vector3 EntityState::msMinPos = Vector3::ZERO;
35	Vector3 EntityState::msMaxPos = Vector3::ZERO;
36
37	EntityState::EntityState(Entity *ent, State entityState, Real speed):
38	mEntity(ent), mState(entityState), mAnimationSpeed(speed)
39	{
40	switch(entityState)
41	{
42	case MOVING:
43	mAnimationState = mEntity->getAnimationState("Walk");
44	break;
45	case WAITING:
46	mAnimationState = mEntity->getAnimationState("Idle");
47	break;
48	case STOP:
49	mAnimationState = NULL;
50	break;
51	default:
52	break;
53	}
54	// enable animation state
55	if (mAnimationState)
56	{
57	mAnimationState->setLoop(true);
58	mAnimationState->setEnabled(true);
59	}
60
61	mTimeElapsed = Math::RangeRandom(1, 5);
62	}
63	//-----------------------------------------------------------------------
64	EntityState::~EntityState()
65	{
66	mAnimationState = NULL;
67	mEntity = NULL;
68	}
69	//-----------------------------------------------------------------------
70	Entity *EntityState::GetEntity()
71	{
72	return mEntity;
73	}
74	//-----------------------------------------------------------------------
75	EntityState::State EntityState::GetState()
76	{
77	return mState;
78	}
79	//-----------------------------------------------------------------------
80	void EntityState::update(Real timeSinceLastFrame)
81	{
82	mTimeElapsed -= timeSinceLastFrame * mAnimationSpeed;
83
84	if (!mEntity \|\| !mAnimationState)
85	return;
86
87	if (mState == MOVING) // toggle between moving (longer) and waiting (short)
88	{
89	SceneNode *parent = mEntity->getParentSceneNode();
90
91	if (!parent)
92	return;
93
94	if (mTimeElapsed <= 0) // toggle animation state
95	{
96	if (mAnimationState->getAnimationName() == "Idle")
97	{
98	SetAnimationState("Walk", true);
99
100	mTimeElapsed = walk_duration; // walk for mTimeElapsed units
101
102	// choose random rotation
103	Radian rnd = Radian(Math::UnitRandom() * Math::PI * rotate_factor);
104
105	//mEntity->getParentSceneNode()->rotate();
106	parent->yaw(rnd);
107	}
108	else
109	{
110	SetAnimationState("Idle", true);
111	mTimeElapsed = wait_duration; // wait for mTimeElapsed seconds
112	}
113	}
114
115	if (mAnimationState->getAnimationName() == "Walk") // move forward
116	{
117	// store old position, just in case we get out of bounds
118	Vector3 oldPos = parent->getPosition();
119	parent->translate(parent->getLocalAxes(), Vector3(move_factor * mAnimationSpeed, 0, 0));
120
121	// HACK: if out of bounds => reset to old position and set animationstate to idle
122	if (OutOfBounds(parent))
123	{
124	parent->setPosition(oldPos);
125	SetAnimationState("Idle", true);
126
127	mTimeElapsed = wait_duration;
128	}
129	}
130	}
131
132	// add time to drive animation
133	mAnimationState->addTime(timeSinceLastFrame * mAnimationSpeed);
134	}
135	//-----------------------------------------------------------------------
136	void EntityState::SetAnimationState(String stateStr, bool loop)
137	{
138	if (!mEntity)
139	return;
140
141	mAnimationState = mEntity->getAnimationState(stateStr);
142	mAnimationState->setLoop(loop);
143	mAnimationState->setEnabled(true);
144	}
145	//-----------------------------------------------------------------------
146	bool EntityState::OutOfBounds(SceneNode *node)
147	{
148	Vector3 pos = node->getPosition();
149
150	if ((pos > msMinPos) && (pos < msMaxPos))
151	return false;
152
153	return true;
154	}
155
156
157
158	/********************************************************************/
159	/* TestCullingTerrainApplication implementation */
160	/********************************************************************/
161
162
163	TestCullingTerrainApplication::TestCullingTerrainApplication():
164	mTerrainContentGenerator(NULL),
165	mRayQueryExecutor(NULL),
166	mIVReader(NULL),
167	mFilename("terrain"),
168	mViewCellsFilename(""),
169	mAlgorithm(GtpVisibility::VisibilityEnvironment::COHERENT_HIERARCHICAL_CULLING)
170	{
171	}
172	//-------------------------------------------------------------------------
173	void TestCullingTerrainApplication::loadConfig(const String& filename)
174	{
175	// Set up the options
176	ConfigFile config;
177	String val;
178
179	config.load(filename);
180
181	std::stringstream d; d << "reading the config file from: " << filename;
182	LogManager::getSingleton().logMessage(d.str());
183
184	val = config.getSetting("Scene");
185
186	if (!val.empty())
187	{
188	mFilename = val.c_str();
189	d << "\nloading scene from file: " << mFilename;
190	LogManager::getSingleton().logMessage(d.str());
191	}
192	}
193	//-----------------------------------------------------------------------
194	TestCullingTerrainApplication::~TestCullingTerrainApplication()
195	{
196	OGRE_DELETE(mTerrainContentGenerator);
197	OGRE_DELETE(mRayQueryExecutor);
198	OGRE_DELETE(mIVReader);
199
200	deleteEntityStates();
201	}
202	//-----------------------------------------------------------------------
203	void TestCullingTerrainApplication::deleteEntityStates()
204	{
205	for (int i = 0; i < (int)mEntityStates.size(); ++i)
206	{
207	OGRE_DELETE(mEntityStates[i]);
208	}
209
210	mEntityStates.clear();
211	}
212	//-----------------------------------------------------------------------
213	void TestCullingTerrainApplication::createCamera()
214	{
215	// create the camera
216	mCamera = mSceneMgr->createCamera("PlayerCam");
217
218	/** set a nice viewpoint
219	* we use a camera node here and apply all transformations on it instead
220	* of applying all transformations directly to the camera
221	* because then the camera is displayed correctly in the visualization
222	*/
223	// hack: vienna view point
224	Vector3 viewPoint(830, 300, -540);
225
226	mCamNode = mSceneMgr->getRootSceneNode()->
227	createChildSceneNode("CamNode1", viewPoint);
228
229	mCamNode->setOrientation(Quaternion(-0.3486, 0.0122, 0.9365, 0.0329));
230	mCamNode->attachObject(mCamera);
231
232	///////////////////
233	//-- create visualization camera
234
235	mVizCamera = mSceneMgr->createCamera("VizCam");
236	mVizCamera->setPosition(mCamNode->getPosition());
237
238	mVizCamera->setNearClipDistance(1);
239	mCamera->setNearClipDistance(1);
240
241	// infinite far plane?
242	if (mRoot->getRenderSystem()->getCapabilities()->hasCapability(RSC_INFINITE_FAR_PLANE))
243	{
244	mVizCamera->setFarClipDistance(0);
245	mCamera->setFarClipDistance(0);
246	}
247	else
248	{
249	mVizCamera->setFarClipDistance(20000);
250	mCamera->setFarClipDistance(20000);
251	}
252	}
253
254	//-----------------------------------------------------------------------
255	bool TestCullingTerrainApplication::setup()
256	{
257	bool carryOn = ExampleApplication::setup();
258
259	if (carryOn)
260	createRenderTargetListener();
261
262	return carryOn;
263	}
264	//-----------------------------------------------------------------------
265	void TestCullingTerrainApplication::createRenderTargetListener()
266	{
267	mWindow->addListener(new VisualizationRenderTargetListener(mSceneMgr));
268	}
269	//-----------------------------------------------------------------------
270	bool TestCullingTerrainApplication::LoadSceneCollada(const String &filename,
271	SceneNode *root,
272	const int index)
273	{
274	#if COLLADA
275	// Collada
276	ColladaDocument *daeDoc = new ColladaDocument(mSceneMgr);
277
278	String daeName = filename;
279	//if (daeName.empty())
280	// daeName = "City_1500.dae";
281
282	// default directory
283	//daeName.insert(0, "../../media/models/collada/City");
284	LogManager::getSingleton().logMessage("ColladaDocument - import started");
285
286	// full import
287	if (daeDoc->doImport(daeName))
288	{
289	LogManager::getSingleton().logMessage("loading collada");
290	/**
291	* build up scene
292	* if you only want a specific part of the scene graph, you must fetch a scene node
293	* by its unique node name and give it as parameter
294	* e.g.
295	* ColladaSceneNode *box = mScene->getNode("Box2");
296	* if (box != NULL) box->createOgreInstance(NULL);
297	*/
298	daeDoc->getScene()->createOgreInstance(NULL);
299
300	// everything is loaded, we do not need the collada document anymore
301	delete daeDoc;
302
303	return true;
304	}
305	else
306	{
307	LogManager::getSingleton().logMessage("ColladaDocument - import failed");
308	return false;
309	}
310	#endif
311	return true;
312	}
313	//-----------------------------------------------------------------------
314	bool TestCullingTerrainApplication::LoadSceneIV(const String &filename,
315	SceneNode *root,
316	const int index)
317	{
318	mIVReader = new IVReader();
319
320	Timer *timer = PlatformManager::getSingleton().createTimer();
321	timer->reset();
322
323	if (1)
324	{
325	std::string logFilename = "IVLog" + Ogre::StringConverter().toString(index) + ".log";
326
327	Log *log = LogManager::getSingleton().createLog(logFilename);
328	mIVReader->setLog(log);
329	}
330
331	//viennaNode->translate(Vector3(-300, -300, 0));
332
333	if (mIVReader->loadFile(filename.c_str()))
334	{
335	SceneNode *node = root->createChildSceneNode("IVSceneNode" + index);
336
337	mIVReader->buildTree(mSceneMgr, node);
338
339	mIVReader->collapse();
340	OGRE_DELETE(mIVReader);
341
342	std::stringstream d;
343	d << "loaded " << filename << " in " << timer->getMilliseconds() * 1e-3 << " secs";
344	LogManager::getSingleton().logMessage(d.str());
345
346	PlatformManager::getSingleton().destroyTimer(timer);
347
348	//-- bake into static geometry
349	if (USE_STATIC_GEOMETRY)
350	{
351	BakeSceneIntoStaticGeometry("staticVienna", "Vienna");
352	}
353
354	return true;
355	}
356
357	return false;
358	}
359	//--------------------------------------------------------
360	void TestCullingTerrainApplication::BakeSceneIntoStaticGeometry(const String &staticGeomName,
361	const String &nodeName)
362	{
363	#if OGRE_103
364	// note: different static geom for roofs, roads, ..., becazse they have same material
365	StaticGeometry *staticGeom = mSceneMgr->createStaticGeometry(staticGeomName);
366
367	// note: looping over entities here. why does scene node not work?
368	SceneManager::EntityIterator it = mSceneMgr->getEntityIterator();
369	while (it.hasMoreElements())
370	{
371	Entity *ent = it.getNext();
372	ent->setVisible(false);
373	staticGeom->addEntity(ent, ent->getParentSceneNode()->getPosition());
374	}
375
376	staticGeom->setRegionDimensions(Vector3(100,100,100));
377	staticGeom->build();
378
379	// cleanup node
380	//wallsNode->detachAllObjects();
381
382	//roofsNode->detachAllObjects();
383	//roadsNode->detachAllObjects();
384	//planeNode->detachAllObjects();
385
386	//viennaNode->removeChild("Walls");
387	mSceneMgr->destroySceneNode(nodeName);
388	#endif
389	}
390	//--------------------------------------------------------
391	void TestCullingTerrainApplication::createScene()
392	{
393	/////////
394	//-- load parameters & scene
395	//loadConfig("terrainCulling.cfg");
396
397	/////////////////////////////////////
398
399	// Set ambient light
400	mAmbientLight = ColourValue(0.5, 0.5, 0.5);
401	mSceneMgr->setAmbientLight(mAmbientLight);
402
403	//-- create light
404	mSunLight = mSceneMgr->createLight("SunLight");
405	mSunLight->setType(Light::LT_DIRECTIONAL);
406	//mSunLight->setType(Light::LT_SPOTLIGHT);
407	//mSunLight->setSpotlightRange(Degree(30), Degree(50));
408
409	mSunLight->setPosition(707, 2000, 500);
410	mSunLight->setCastShadows(true);
411
412	// set light angle not too small over the surface,
413	// otherwise shadows textures will be broken
414	Vector3 dir(0.5, 1, 0.5);
415	dir.normalise();
416	mSunLight->setDirection(dir);
417	//mSunLight->setDirection(Vector3::NEGATIVE_UNIT_Y);
418	mSunLight->setDiffuseColour(1, 1, 1);
419	mSunLight->setSpecularColour(1, 1, 1);
420
421	// it's VERY important to set fog before calling setWorldGeometry
422	// because the vertex program picked will be different
423	ColourValue fadeColour(0.93, 0.86, 0.76);
424	mWindow->getViewport(0)->setBackgroundColour(fadeColour);
425	//mSceneMgr->setFog(FOG_LINEAR, fadeColour, .001, 500, 1000);
426
427	// Create a skybox
428	mSceneMgr->setSkyBox(true, "Examples/CloudyNoonSkyBox", 50000, true);
429
430	// terrain creation
431	std::string terrain_cfg("terrainCulling.cfg");
432
433	mSceneMgr->setWorldGeometry(terrain_cfg);
434
435	// was terrain loaded?
436	mSceneMgr->getOption("ShowTerrain", &msShowHillyTerrain);
437	msShowHillyTerrain=true;
438
439
440	// hack view point for terrain
441	if (msShowHillyTerrain)
442	{
443	Vector3 viewPoint(707, 5000, 528);
444	mCamNode->setPosition(viewPoint);
445	}
446
447
448	//-- CEGUI setup
449	setupGui();
450
451	// Warning: In GL since we can't go higher than the window res
452	mSceneMgr->setShadowTextureSettings(1024, 2);
453	mSceneMgr->setShadowColour(ColourValue(0.5, 0.5, 0.5));
454
455
456	//////////////
457	//-- terrain content setup
458
459	// HACK: necessary to call once here for terrain initialisation
460	mSceneMgr->_renderScene(mCamera, mWindow->getViewport(0), true);
461
462	// ray query executor: needed to clamp to terrain
463	mRayQueryExecutor = new RayQueryExecutor(mSceneMgr);
464
465	mTerrainMinPos = EntityState::msMinPos = Vector3(0, 0, 0);
466	mTerrainMaxPos = EntityState::msMaxPos = Vector3(5000, 5000, 5000);
467
468	mTerrainContentGenerator = new TerrainContentGenerator(mSceneMgr);
469
470	// if no objects in file, we generate new objects
471	if (msShowHillyTerrain && !mTerrainContentGenerator->LoadObjects("objects.out"))
472	{
473	// the objects are generated randomly distributed over the terrain
474	if (1) generateScene(1000, 0); // create robots
475	if (0) generateScene(100, 1); // create ninjas
476	if (1) generateScene(500, 2); // create trees
477	}
478	int MaxDepth=30;
479	mSceneMgr->setOption("BiHierarchyMaxDepth", &MaxDepth);
480	int Mode=1;
481	mSceneMgr->setOption("EnhancedVisibility", &Mode);
482	mSceneMgr->setOption("RebuildBiHierarchy", NULL);
483	mSceneMgr->setOption("RebuildKdTree", NULL);
484	}
485	//-----------------------------------------------------------------------
486	void TestCullingTerrainApplication::generateScene(int num, int objectType)
487	{
488	const float val = TerrainFrameListener::msObjectScales[objectType];
489	Vector3 scale(val, val, val);
490	const float maxHeight = 75;
491
492	// In order to provide much occlusion,
493	// height is restricted to maxHeight => no objects are created on peaks
494	mTerrainContentGenerator->SetMinPos(Vector3(mTerrainMinPos));
495	mTerrainContentGenerator->SetMaxPos(Vector3(mTerrainMaxPos.x, maxHeight, mTerrainMaxPos.z));
496
497	mTerrainContentGenerator->SetScale(scale);
498	mTerrainContentGenerator->SetOffset(TerrainFrameListener::msObjectTerrainOffsets[objectType]);
499	mTerrainContentGenerator->GenerateScene(num, TerrainFrameListener::msObjectCaptions[objectType]);
500
501	if (objectType != 0) // from our objects, only robot has animation phases
502	return;
503
504	EntityList *entList = mTerrainContentGenerator->GetGeneratedEntities();
505
506	/////////////
507	//-- add animation state for new robots (located at the end of the list)
508
509	for (int i = (int)entList->size() - num; i < (int)entList->size(); ++i)
510	{
511	mEntityStates.push_back(new EntityState((*entList)[i],
512	EntityState::WAITING, Math::RangeRandom(0.5, 1.5)));
513	}
514
515	// release limitations on height => it is possible for the user to put single
516	// objects on peaks of the terrain (will be only few, not relevant for occlusion)
517	mTerrainContentGenerator->SetMaxPos(mTerrainMaxPos);
518	}
519	//-----------------------------------------------------------------------
520	void TestCullingTerrainApplication::updateAnimations(Real timeSinceLastFrame)
521	{
522	for (int i = 0; i < (int)mEntityStates.size(); ++i)
523	{
524	SceneNode *sn = mEntityStates[i]->GetEntity()->getParentSceneNode();
525
526	mEntityStates[i]->update(timeSinceLastFrame);
527
528	if (mEntityStates[i]->GetState() == EntityState::MOVING)
529	{
530	Clamp2Terrain(sn, 0); //sn->setNodeVisible(false);
531	}
532	}
533	}
534	//-----------------------------------------------------------------------
535	EntityStates &TestCullingTerrainApplication::getEntityStates()
536	{
537	return mEntityStates;
538	}
539	//-----------------------------------------------------------------------
540	void TestCullingTerrainApplication::setupGui()
541	{
542	#if OGRE103
543	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
544	false, 3000, ST_EXTERIOR_CLOSE);
545	#else
546	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
547	false, 3000, mSceneMgr);
548	#endif
549	mGUISystem = new CEGUI::System(mGUIRenderer);
550
551	// Mouse
552	CEGUI::SchemeManager::getSingleton().loadScheme((CEGUI::utf8*)"TaharezLook.scheme");
553	CEGUI::MouseCursor::getSingleton().setImage("TaharezLook", "MouseArrow");
554	mGUISystem->setDefaultMouseCursor((CEGUI::utf8*)"TaharezLook",
555	(CEGUI::utf8*)"MouseArrow");
556
557	CEGUI::MouseCursor::getSingleton().hide();
558	}
559	//-----------------------------------------------------------------------
560	void TestCullingTerrainApplication::createFrameListener()
561	{
562	mTerrainFrameListener =
563	new TerrainFrameListener(mWindow,
564	mCamera,
565	mSceneMgr,
566	mGUIRenderer,
567	mTerrainContentGenerator,
568	mVizCamera,
569	mCamNode,
570	mSunLight,
571	this);
572
573	mTerrainFrameListener->setPriority(10);
574
575	mRoot->addFrameListener(mTerrainFrameListener);
576	}
577	//-----------------------------------------------------------------------
578	void TestCullingTerrainApplication::chooseSceneManager()
579	{
580	#ifdef OGRE_103
581	if (msShowHillyTerrain)
582	{
583	// Terrain scene manager
584	mSceneMgr = mRoot->getSceneManager(ST_EXTERIOR_CLOSE);
585	}
586	else
587	{ // octree scene manager
588	mSceneMgr = mRoot->getSceneManager(ST_GENERIC);
589	}
590	#else
591
592	//mSceneMgr = mRoot->createSceneManager("OcclusionCullingSceneManager");
593	mSceneMgr = mRoot->createSceneManager("BiHierarchySceneManager");
594	//mSceneMgr = mRoot->createSceneManager("BiTreeTerrainSceneManager");
595
596	#endif
597	}
598	//-----------------------------------------------------------------------
599	bool TestCullingTerrainApplication::Clamp2Terrain(SceneNode *node, int terrainOffs)
600	{
601	// clamp scene node to terrain
602	Vector3 pos = node->getPosition();
603	Vector3 queryResult;
604
605	if (mRayQueryExecutor->executeRayQuery(&queryResult,
606	Vector3(pos.x, MAX_HEIGHT, pos.z), Vector3::NEGATIVE_UNIT_Y))
607	{
608	node->setPosition(pos.x, queryResult.y + terrainOffs, pos.z);
609	return true;
610	}
611
612	return false;
613	}
614
615	//-----------------------------------------------------------------------
616	bool TestCullingTerrainApplication::Clamp2FloorPlane(const float dist)
617	{
618	// clamp to floor plane
619	RaySceneQuery *raySceneQuery = mSceneMgr->createRayQuery(
620	Ray(mCamNode->getPosition(), Vector3::NEGATIVE_UNIT_Y));
621
622	RaySceneQueryResult& qryResult = raySceneQuery->execute();
623
624	RaySceneQueryResult::iterator rit = qryResult.begin();
625	bool success = false;
626
627	float yVal = 0;
628	float minVal = 999999999999;
629
630	while (rit != qryResult.end() && rit->movable)
631	{
632	if (rit->movable->getName() != "PlayerCam")
633	{
634	// place on the ground object
635	yVal = rit->movable->getWorldBoundingBox().getCenter().y;
636	if (yVal < minVal)
637	minVal = yVal;
638
639	//std::stringstream d; d << "dist: " << dist << endl;
640	//Ogre::LogManager()
641	success = true;
642	}
643
644	++ rit;
645	}
646
647	// place on the ground object
648	if (success)
649	{
650	mCamNode->setPosition(mCamNode->getPosition().x,
651	minVal + dist,
652	mCamNode->getPosition().z);
653	}
654
655	OGRE_DELETE(raySceneQuery);
656
657	return success;
658	}
659
660	//-----------------------------------------------------------------------
661	// splits strings containing multiple file names
662	static int SplitFilenames(const std::string str, std::vector<std::string> &filenames)
663	{
664	int pos = 0;
665
666	while(1)
667	{
668	int npos = (int)str.find(';', pos);
669
670	if (npos < 0 \|\| npos - pos < 1)
671	break;
672	filenames.push_back(std::string(str, pos, npos - pos));
673	pos = npos + 1;
674	}
675
676	filenames.push_back(std::string(str, pos, str.size() - pos));
677	return (int)filenames.size();
678	}
679	//-----------------------------------------------------------------------
680	bool TestCullingTerrainApplication::LoadScene(const String &filename)
681	{
682	using namespace std;
683	// use leaf nodes of the original spatial hierarchy as occludees
684	vector<string> filenames;
685	int files = SplitFilenames(filename, filenames);
686
687	std::stringstream d;
688	d << "number of input files: " << files << "\n";
689	LogManager::getSingleton().logMessage(d.str());
690
691	bool result = false;
692	vector<string>::const_iterator fit, fit_end = filenames.end();
693	int i = 0;
694
695	for (fit = filenames.begin(); fit != fit_end; ++ fit, ++ i)
696	{
697	const string fn = *fit;
698
699	if (strstr(fn.c_str(), ".iv") \|\| strstr(fn.c_str(), ".wrl"))
700	{
701	// load iv files
702	if (!LoadSceneIV(fn, mSceneMgr->getRootSceneNode(), i))
703	{
704	// terrain hack
705	//msShowHillyTerrain = true;
706	LogManager::getSingleton().logMessage("error loading scene => load terrain");
707	}
708	}
709	else if (strstr(filename.c_str(), ".dae"))
710	{
711	// load collada files
712	LoadSceneCollada(fn, mSceneMgr->getRootSceneNode(), i);
713	}
714	else //if (filename == "terrain")
715	{
716	// terrain hack
717	msShowHillyTerrain = true;
718	LogManager::getSingleton().logMessage("loading terrain");
719	}
720
721	result = true;
722	}
723
724	return result;
725	}
726	//-----------------------------------------------------------------------
727	bool TestCullingTerrainApplication::LoadViewCells(const String &filename)
728	{
729	// if not already loaded,
730	// the scene manager will load the view cells
731	return mSceneMgr->setOption("UseViewCells", filename.c_str());
732	}
733
734
735	/**********************************************************************/
736	/* VisualizationRenderTargetListener implementation */
737	/**********************************************************************/
738
739
740	//-----------------------------------------------------------------------
741	VisualizationRenderTargetListener::VisualizationRenderTargetListener(SceneManager *sceneMgr)
742	:RenderTargetListener(), mSceneMgr(sceneMgr)
743	{
744	}
745	//-----------------------------------------------------------------------
746	void VisualizationRenderTargetListener::preViewportUpdate(const RenderTargetViewportEvent &evt)
747	{
748	// visualization viewport
749	const bool showViz = evt.source->getZOrder() == VIZ_VIEWPORT_Z_ORDER;
750	const bool nShowViz = !showViz;
751
752	mSavedShadowTechnique = mSceneMgr->getShadowTechnique();
753	mSavedAmbientLight = mSceneMgr->getAmbientLight();
754
755	// -- ambient light must be full for visualization, shadows disabled
756	if (showViz)
757	{
758	mSceneMgr->setAmbientLight(ColourValue(1, 1, 1));
759	mSceneMgr->setShadowTechnique(SHADOWTYPE_NONE);
760	}
761
762	mSceneMgr->setOption("PrepareVisualization", &showViz);
763	mSceneMgr->setOption("SkyBoxEnabled", &nShowViz);
764
765	RenderTargetListener::preViewportUpdate(evt);
766	}
767	//-----------------------------------------------------------------------
768	void VisualizationRenderTargetListener::postRenderTargetUpdate(const RenderTargetEvent &evt)
769	{
770	// reset values
771	mSceneMgr->setShadowTechnique(mSavedShadowTechnique);
772	mSceneMgr->setAmbientLight(mSavedAmbientLight);
773
774	RenderTargetListener::postRenderTargetUpdate(evt);
775	}
776	//-----------------------------------------------------------------------
777	INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
778	{
779	// Create application object
780	TestCullingTerrainApplication app;
781
782	try
783	{
784	app.go();
785	}
786	catch( Ogre::Exception& e )
787	{
788	MessageBox( NULL, e.getFullDescription().c_str(),
789	"An exception has occured!", MB_OK \| MB_ICONERROR \| MB_TASKMODAL);
790	}
791
792	return 0;
793	}

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