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source: GTP/trunk/App/Demos/Vis/HillyTerrain/OGRE/TestCullingTerrainApplication.cpp @ 2305

Revision 2305, 23.2 KB checked in by mattausch, 18 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	//-- Fog
422
423	// NB it's VERY important to set this before calling setWorldGeometry
424	// because the vertex program picked will be different
425	ColourValue fadeColour(0.93, 0.86, 0.76);
426	mWindow->getViewport(0)->setBackgroundColour(fadeColour);
427	//mSceneMgr->setFog(FOG_LINEAR, fadeColour, .001, 500, 1000);
428
429	// Create a skybox
430	mSceneMgr->setSkyBox(true, "Examples/CloudyNoonSkyBox", 50000, true);
431
432	// terrain creation
433	std::string terrain_cfg("terrainCulling.cfg");
434	mSceneMgr->setWorldGeometry(terrain_cfg);
435
436	// was terrain loaded?
437	mSceneMgr->getOption("ShowTerrain", &msShowHillyTerrain);
438
439	// hack view point for terrain
440	if (msShowHillyTerrain)
441	{
442	Vector3 viewPoint(707, 5000, 528);
443	mCamNode->setPosition(viewPoint);
444	}
445
446
447	//-- CEGUI setup
448	setupGui();
449
450	// Warning: In GL since we can't go higher than the window res
451	mSceneMgr->setShadowTextureSettings(1024, 2);
452	mSceneMgr->setShadowColour(ColourValue(0.5, 0.5, 0.5));
453
454
455	//////////////
456	//-- terrain content setup
457
458	// HACK: necessary to call once here for terrain initialisation
459	mSceneMgr->_renderScene(mCamera, mWindow->getViewport(0), true);
460
461	// ray query executor: needed to clamp to terrain
462	mRayQueryExecutor = new RayQueryExecutor(mSceneMgr);
463
464	mTerrainMinPos = EntityState::msMinPos = Vector3(0, 0, 0);
465	mTerrainMaxPos = EntityState::msMaxPos = Vector3(5000, 5000, 5000);
466
467	mTerrainContentGenerator = new TerrainContentGenerator(mSceneMgr);
468
469	// if no objects in file, we generate new objects
470	if (msShowHillyTerrain && !mTerrainContentGenerator->LoadObjects("objects.out"))
471	{
472	// the objects are generated randomly distributed over the terrain
473	if (1) generateScene(1500, 0); // create robots
474	if (0) generateScene(100, 1); // create ninjas
475	if (0) generateScene(1000, 2); // create trees
476	}
477	}
478	//-----------------------------------------------------------------------
479	void TestCullingTerrainApplication::generateScene(int num, int objectType)
480	{
481	const float val = TerrainFrameListener::msObjectScales[objectType];
482	Vector3 scale(val, val, val);
483	const float maxHeight = 75;
484
485	// In order to provide much occlusion,
486	// height is restricted to maxHeight => no objects are created on peaks
487	mTerrainContentGenerator->SetMinPos(Vector3(mTerrainMinPos));
488	mTerrainContentGenerator->SetMaxPos(Vector3(mTerrainMaxPos.x, maxHeight, mTerrainMaxPos.z));
489
490	mTerrainContentGenerator->SetScale(scale);
491	mTerrainContentGenerator->SetOffset(TerrainFrameListener::msObjectTerrainOffsets[objectType]);
492	mTerrainContentGenerator->GenerateScene(num, TerrainFrameListener::msObjectCaptions[objectType]);
493
494	if (objectType != 0) // from our objects, only robot has animation phases
495	return;
496
497	EntityList *entList = mTerrainContentGenerator->GetGeneratedEntities();
498
499	/////////////
500	//-- add animation state for new robots (located at the end of the list)
501
502	for (int i = (int)entList->size() - num; i < (int)entList->size(); ++i)
503	{
504	mEntityStates.push_back(new EntityState((*entList)[i],
505	EntityState::WAITING, Math::RangeRandom(0.5, 1.5)));
506	}
507
508	// release limitations on height => it is possible for the user to put single
509	// objects on peaks of the terrain (will be only few, not relevant for occlusion)
510	mTerrainContentGenerator->SetMaxPos(mTerrainMaxPos);
511	}
512	//-----------------------------------------------------------------------
513	void TestCullingTerrainApplication::updateAnimations(Real timeSinceLastFrame)
514	{
515	for (int i = 0; i < (int)mEntityStates.size(); ++i)
516	{
517	SceneNode *sn = mEntityStates[i]->GetEntity()->getParentSceneNode();
518
519	mEntityStates[i]->update(timeSinceLastFrame);
520
521	if (mEntityStates[i]->GetState() == EntityState::MOVING)
522	{
523	Clamp2Terrain(sn, 0); //sn->setNodeVisible(false);
524	}
525	}
526	}
527	//-----------------------------------------------------------------------
528	EntityStates &TestCullingTerrainApplication::getEntityStates()
529	{
530	return mEntityStates;
531	}
532	//-----------------------------------------------------------------------
533	void TestCullingTerrainApplication::setupGui()
534	{
535	#if OGRE103
536	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
537	false, 3000, ST_EXTERIOR_CLOSE);
538	#else
539	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
540	false, 3000, mSceneMgr);
541	#endif
542	mGUISystem = new CEGUI::System(mGUIRenderer);
543
544	// Mouse
545	CEGUI::SchemeManager::getSingleton().loadScheme((CEGUI::utf8*)"TaharezLook.scheme");
546	CEGUI::MouseCursor::getSingleton().setImage("TaharezLook", "MouseArrow");
547	mGUISystem->setDefaultMouseCursor((CEGUI::utf8*)"TaharezLook",
548	(CEGUI::utf8*)"MouseArrow");
549
550	CEGUI::MouseCursor::getSingleton().hide();
551	}
552	//-----------------------------------------------------------------------
553	void TestCullingTerrainApplication::createFrameListener()
554	{
555	mTerrainFrameListener =
556	new TerrainFrameListener(mWindow,
557	mCamera,
558	mSceneMgr,
559	mGUIRenderer,
560	mTerrainContentGenerator,
561	mVizCamera,
562	mCamNode,
563	mSunLight,
564	this);
565
566	mTerrainFrameListener->setPriority(10);
567	mTerrainFrameListener->setPriority(10);
568	mRoot->addFrameListener(mTerrainFrameListener);
569	}
570	//-----------------------------------------------------------------------
571	void TestCullingTerrainApplication::chooseSceneManager()
572	{
573	#ifdef OGRE_103
574	if (msShowHillyTerrain)
575	{
576	// Terrain scene manager
577	mSceneMgr = mRoot->getSceneManager(ST_EXTERIOR_CLOSE);
578	}
579	else
580	{ // octree scene manager
581	mSceneMgr = mRoot->getSceneManager(ST_GENERIC);
582	}
583	#else
584
585	mSceneMgr = mRoot->createSceneManager("OcclusionCullingSceneManager");
586
587	//mSceneMgr = mRoot->createSceneManager("TerrainSceneManager");
588	//mSceneMgr = mRoot->createSceneManager("OctreeSceneManager");
589
590	//mSceneMgr = mRoot->createSceneManager("KdTreeSceneManager");
591
592	#endif
593	}
594	//-----------------------------------------------------------------------
595	bool TestCullingTerrainApplication::Clamp2Terrain(SceneNode *node, int terrainOffs)
596	{
597	// clamp scene node to terrain
598	Vector3 pos = node->getPosition();
599	Vector3 queryResult;
600
601	if (mRayQueryExecutor->executeRayQuery(&queryResult,
602	Vector3(pos.x, MAX_HEIGHT, pos.z), Vector3::NEGATIVE_UNIT_Y))
603	{
604	node->setPosition(pos.x, queryResult.y + terrainOffs, pos.z);
605	return true;
606	}
607
608	return false;
609	}
610
611	//-----------------------------------------------------------------------
612	bool TestCullingTerrainApplication::Clamp2FloorPlane(const float dist)
613	{
614	// clamp to floor plane
615	RaySceneQuery *raySceneQuery = mSceneMgr->createRayQuery(
616	Ray(mCamNode->getPosition(), Vector3::NEGATIVE_UNIT_Y));
617
618	RaySceneQueryResult& qryResult = raySceneQuery->execute();
619
620	RaySceneQueryResult::iterator rit = qryResult.begin();
621	bool success = false;
622
623	float yVal = 0;
624	float minVal = 999999999999;
625
626	while (rit != qryResult.end() && rit->movable)
627	{
628	if (rit->movable->getName() != "PlayerCam")
629	{
630	// place on the ground object
631	yVal = rit->movable->getWorldBoundingBox().getCenter().y;
632	if (yVal < minVal)
633	minVal = yVal;
634
635	//std::stringstream d; d << "dist: " << dist << endl;
636	//Ogre::LogManager()
637	success = true;
638	}
639
640	++ rit;
641	}
642
643	// place on the ground object
644	if (success)
645	mCamNode->setPosition(
646	mCamNode->getPosition().x,
647	minVal + dist,
648	mCamNode->getPosition().z);
649
650	OGRE_DELETE(raySceneQuery);
651	return success;
652	}
653
654	//-----------------------------------------------------------------------
655	// splits strings containing multiple file names
656	static int SplitFilenames(const std::string str, std::vector<std::string> &filenames)
657	{
658	int pos = 0;
659
660	while(1)
661	{
662	int npos = (int)str.find(';', pos);
663
664	if (npos < 0 \|\| npos - pos < 1)
665	break;
666	filenames.push_back(std::string(str, pos, npos - pos));
667	pos = npos + 1;
668	}
669
670	filenames.push_back(std::string(str, pos, str.size() - pos));
671	return (int)filenames.size();
672	}
673	//-----------------------------------------------------------------------
674	bool TestCullingTerrainApplication::LoadScene(const String &filename)
675	{
676	using namespace std;
677	// use leaf nodes of the original spatial hierarchy as occludees
678	vector<string> filenames;
679	int files = SplitFilenames(filename, filenames);
680
681	std::stringstream d;
682	d << "number of input files: " << files << "\n";
683	LogManager::getSingleton().logMessage(d.str());
684
685	bool result = false;
686	vector<string>::const_iterator fit, fit_end = filenames.end();
687	int i = 0;
688
689	for (fit = filenames.begin(); fit != fit_end; ++ fit, ++ i)
690	{
691	const string fn = *fit;
692
693	if (strstr(fn.c_str(), ".iv") \|\| strstr(fn.c_str(), ".wrl"))
694	{
695	// load iv files
696	if (!LoadSceneIV(fn, mSceneMgr->getRootSceneNode(), i))
697	{
698	// terrain hack
699	//msShowHillyTerrain = true;
700	LogManager::getSingleton().logMessage("error loading scene => load terrain");
701	}
702	}
703	else if (strstr(filename.c_str(), ".dae"))
704	{
705	// load collada files
706	LoadSceneCollada(fn, mSceneMgr->getRootSceneNode(), i);
707	}
708	else //if (filename == "terrain")
709	{
710	// terrain hack
711	msShowHillyTerrain = true;
712	LogManager::getSingleton().logMessage("loading terrain");
713	}
714
715	result = true;
716	}
717
718	return result;
719	}
720	//-----------------------------------------------------------------------
721	bool TestCullingTerrainApplication::LoadViewCells(const String &filename)
722	{
723	// if not already loaded,
724	// the scene manager will load the view cells
725	return mSceneMgr->setOption("UseViewCells", filename.c_str());
726	}
727
728
729	/**********************************************************************/
730	/* VisualizationRenderTargetListener implementation */
731	/**********************************************************************/
732
733
734	//-----------------------------------------------------------------------
735	VisualizationRenderTargetListener::VisualizationRenderTargetListener(SceneManager *sceneMgr)
736	:RenderTargetListener(), mSceneMgr(sceneMgr)
737	{
738	}
739	//-----------------------------------------------------------------------
740	void VisualizationRenderTargetListener::preViewportUpdate(const RenderTargetViewportEvent &evt)
741	{
742	// visualization viewport
743	const bool showViz = evt.source->getZOrder() == VIZ_VIEWPORT_Z_ORDER;
744	const bool nShowViz = !showViz;
745
746	mSavedShadowTechnique = mSceneMgr->getShadowTechnique();
747	mSavedAmbientLight = mSceneMgr->getAmbientLight();
748
749	// -- ambient light must be full for visualization, shadows disabled
750	if (showViz)
751	{
752	mSceneMgr->setAmbientLight(ColourValue(1, 1, 1));
753	mSceneMgr->setShadowTechnique(SHADOWTYPE_NONE);
754	}
755
756	mSceneMgr->setOption("PrepareVisualization", &showViz);
757	mSceneMgr->setOption("SkyBoxEnabled", &nShowViz);
758
759	RenderTargetListener::preViewportUpdate(evt);
760	}
761	//-----------------------------------------------------------------------
762	void VisualizationRenderTargetListener::postRenderTargetUpdate(const RenderTargetEvent &evt)
763	{
764	// reset values
765	mSceneMgr->setShadowTechnique(mSavedShadowTechnique);
766	mSceneMgr->setAmbientLight(mSavedAmbientLight);
767
768	RenderTargetListener::postRenderTargetUpdate(evt);
769	}
770	//-----------------------------------------------------------------------
771	INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
772	{
773	// Create application object
774	TestCullingTerrainApplication app;
775
776	try
777	{
778	app.go();
779	}
780	catch( Ogre::Exception& e )
781	{
782	MessageBox( NULL, e.getFullDescription().c_str(),
783	"An exception has occured!", MB_OK \| MB_ICONERROR \| MB_TASKMODAL);
784	}
785
786	return 0;
787	}

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