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source: GTP/trunk/App/Demos/Vis/HillyTerrain/OGRE/TestCullingTerrainApplication.cpp @ 2183

Revision 2183, 24.5 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	// TODO matt
176	// Set up the options
177	ConfigFile config;
178	String val;
179
180	config.load(filename);
181
182	std::stringstream d; d << "reading the config file from: " << filename;
183	LogManager::getSingleton().logMessage(d.str());
184
185	val = config.getSetting("Scene");
186
187	if (!val.empty())
188	{
189	mFilename = val.c_str();
190	d << "\nloading scene from file: " << mFilename;
191	LogManager::getSingleton().logMessage(d.str());
192	}
193
194	/* val = config.getSetting("ViewCells");
195
196	if (!val.empty())
197	{
198	mViewCellsFilename = val.c_str();
199	std::stringstream d; d << "view cells file name: " << mViewCellsFilename;
200	LogManager::getSingleton().logMessage(d.str());
201	}
202
203	mInitialPosition = Vector3::UNIT_SCALE;
204
205	val = config.getSetting("ViewX");
206
207	if (!val.empty())
208	mInitialPosition.x = atof( val.c_str() );
209
210	val = config.getSetting("ViewY");
211
212	if (!val.empty())
213	mInitialPosition.y = atof(val.c_str());
214
215	val = config.getSetting("ViewZ");
216
217	if (!val.empty())
218	mInitialPosition.z = atof( val.c_str());
219	*/
220
221	/* val = config.getSetting("OnlineCullingAlgorithm");
222
223	if (!val.empty())
224	{
225	if (val == "CHC")
226	{
227	mAlgorithm =
228	GtpVisibility::VisibilityEnvironment::COHERENT_HIERARCHICAL_CULLING;
229	}
230	else if (val == "SWC")
231	{
232	mAlgorithm =
233	GtpVisibility::VisibilityEnvironment::STOP_AND_WAIT_CULLING;
234	}
235	else if (val == "VFC")
236	{
237	mAlgorithm =
238	GtpVisibility::VisibilityEnvironment::FRUSTUM_CULLING;
239	}
240	else // default rendering
241	{
242	mAlgorithm =
243	GtpVisibility::VisibilityEnvironment::NUM_CULLING_MANAGERS;
244	}
245	}
246
247	/////////////
248	// setup scene
249
250	// set camera position accordingly
251	mCamNode->setPosition(mInitialPosition);
252	*/
253	}
254	//-----------------------------------------------------------------------
255	TestCullingTerrainApplication::~TestCullingTerrainApplication()
256	{
257	OGRE_DELETE(mTerrainContentGenerator);
258	OGRE_DELETE(mRayQueryExecutor);
259	OGRE_DELETE(mIVReader);
260
261	deleteEntityStates();
262	}
263	//-----------------------------------------------------------------------
264	void TestCullingTerrainApplication::deleteEntityStates()
265	{
266	for (int i = 0; i < (int)mEntityStates.size(); ++i)
267	{
268	OGRE_DELETE(mEntityStates[i]);
269	}
270
271	mEntityStates.clear();
272	}
273	//-----------------------------------------------------------------------
274	void TestCullingTerrainApplication::createCamera()
275	{
276	// create the camera
277	mCamera = mSceneMgr->createCamera("PlayerCam");
278
279	/** set a nice viewpoint
280	* we use a camera node here and apply all transformations on it instead
281	* of applying all transformations directly to the camera
282	* because then the camera is displayed correctly in the visualization
283	*/
284	// hack: vienna view point
285	Vector3 viewPoint(830, 300, -540);
286
287	mCamNode = mSceneMgr->getRootSceneNode()->
288	createChildSceneNode("CamNode1", viewPoint);
289
290	mCamNode->setOrientation(Quaternion(-0.3486, 0.0122, 0.9365, 0.0329));
291	mCamNode->attachObject(mCamera);
292
293	///////////////////
294	//-- create visualization camera
295
296	mVizCamera = mSceneMgr->createCamera("VizCam");
297	mVizCamera->setPosition(mCamNode->getPosition());
298
299	mVizCamera->setNearClipDistance(1);
300	mCamera->setNearClipDistance(1);
301
302	// infinite far plane?
303	if (mRoot->getRenderSystem()->getCapabilities()->hasCapability(RSC_INFINITE_FAR_PLANE))
304	{
305	mVizCamera->setFarClipDistance(0);
306	mCamera->setFarClipDistance(0);
307	}
308	else
309	{
310	mVizCamera->setFarClipDistance(20000);
311	mCamera->setFarClipDistance(20000);
312	}
313	}
314
315	//-----------------------------------------------------------------------
316	bool TestCullingTerrainApplication::setup()
317	{
318	bool carryOn = ExampleApplication::setup();
319
320	if (carryOn)
321	createRenderTargetListener();
322
323	return carryOn;
324	}
325	//-----------------------------------------------------------------------
326	void TestCullingTerrainApplication::createRenderTargetListener()
327	{
328	mWindow->addListener(new VisualizationRenderTargetListener(mSceneMgr));
329	}
330	//-----------------------------------------------------------------------
331	bool TestCullingTerrainApplication::LoadSceneCollada(const String &filename,
332	SceneNode *root,
333	const int index)
334	{
335	#if COLLADA
336	// Collada
337	ColladaDocument *daeDoc = new ColladaDocument(mSceneMgr);
338
339	String daeName = filename;
340	//if (daeName.empty())
341	// daeName = "City_1500.dae";
342
343	// default directory
344	//daeName.insert(0, "../../media/models/collada/City");
345	LogManager::getSingleton().logMessage("ColladaDocument - import started");
346
347	// full import
348	if (daeDoc->doImport(daeName))
349	{
350	LogManager::getSingleton().logMessage("yuppi");
351	/**
352	* build up scene
353	* if you only want a specific part of the scene graph, you must fetch a scene node
354	* by its unique node name and give it as parameter
355	* e.g.
356	* ColladaSceneNode *box = mScene->getNode("Box2");
357	* if (box != NULL) box->createOgreInstance(NULL);
358	*/
359	daeDoc->getScene()->createOgreInstance(NULL);
360
361	// everything is loaded, we do not need the collada document anymore
362	delete daeDoc;
363
364	return true;
365	}
366	else
367	{
368	LogManager::getSingleton().logMessage("ColladaDocument - import failed");
369	return false;
370	}
371	#endif
372	return true;
373	}
374	//-----------------------------------------------------------------------
375	bool TestCullingTerrainApplication::LoadSceneIV(const String &filename,
376	SceneNode *root,
377	const int index)
378	{
379	mIVReader = new IVReader();
380
381	Timer *timer = PlatformManager::getSingleton().createTimer();
382	timer->reset();
383
384	if (1)
385	{
386	std::string logFilename = "IVLog" + Ogre::StringConverter().toString(index) + ".log";
387
388	Log *log = LogManager::getSingleton().createLog(logFilename);
389	mIVReader->setLog(log);
390	}
391
392	//viennaNode->translate(Vector3(-300, -300, 0));
393
394	if (mIVReader->loadFile(filename.c_str()))
395	{
396	SceneNode *node = root->createChildSceneNode("IVSceneNode" + index);
397
398	mIVReader->buildTree(mSceneMgr, node);
399
400	mIVReader->collapse();
401	OGRE_DELETE(mIVReader);
402
403	std::stringstream d;
404	d << "loaded " << filename << " in " << timer->getMilliseconds() * 1e-3 << " secs";
405	LogManager::getSingleton().logMessage(d.str());
406
407	PlatformManager::getSingleton().destroyTimer(timer);
408
409	//-- bake into static geometry
410	if (USE_STATIC_GEOMETRY)
411	{
412	BakeSceneIntoStaticGeometry("staticVienna", "Vienna");
413	}
414
415	return true;
416	}
417
418	return false;
419	}
420	//--------------------------------------------------------
421	void TestCullingTerrainApplication::BakeSceneIntoStaticGeometry(const String &staticGeomName,
422	const String &nodeName)
423	{
424	#if OGRE_103
425	// note: different static geom for roofs, roads, ..., becazse they have same material
426	StaticGeometry *staticGeom = mSceneMgr->createStaticGeometry(staticGeomName);
427
428	// note: looping over entities here. why does scene node not work?
429	SceneManager::EntityIterator it = mSceneMgr->getEntityIterator();
430	while (it.hasMoreElements())
431	{
432	Entity *ent = it.getNext();
433	ent->setVisible(false);
434	staticGeom->addEntity(ent, ent->getParentSceneNode()->getPosition());
435	}
436
437	staticGeom->setRegionDimensions(Vector3(100,100,100));
438	staticGeom->build();
439
440	// cleanup node
441	//wallsNode->detachAllObjects();
442
443	//roofsNode->detachAllObjects();
444	//roadsNode->detachAllObjects();
445	//planeNode->detachAllObjects();
446
447	//viennaNode->removeChild("Walls");
448	mSceneMgr->destroySceneNode(nodeName);
449	#endif
450	}
451	//--------------------------------------------------------
452	void TestCullingTerrainApplication::createScene()
453	{
454	/////////
455	//-- load parameters & scene
456	//loadConfig("terrainCulling.cfg");
457
458	/////////////////////////////////////
459
460	// Set ambient light
461	mAmbientLight = ColourValue(0.5, 0.5, 0.5);
462	mSceneMgr->setAmbientLight(mAmbientLight);
463
464	//-- create light
465	mSunLight = mSceneMgr->createLight("SunLight");
466	mSunLight->setType(Light::LT_DIRECTIONAL);
467	//mSunLight->setType(Light::LT_SPOTLIGHT);
468	//mSunLight->setSpotlightRange(Degree(30), Degree(50));
469
470	mSunLight->setPosition(707, 2000, 500);
471	mSunLight->setCastShadows(true);
472
473	// set light angle not too small over the surface,
474	// otherwise shadows textures will be broken
475	Vector3 dir(0.5, 1, 0.5);
476	dir.normalise();
477	mSunLight->setDirection(dir);
478	//mSunLight->setDirection(Vector3::NEGATIVE_UNIT_Y);
479	mSunLight->setDiffuseColour(1, 1, 1);
480	mSunLight->setSpecularColour(1, 1, 1);
481
482	//-- Fog
483
484	// NB it's VERY important to set this before calling setWorldGeometry
485	// because the vertex program picked will be different
486	ColourValue fadeColour(0.93, 0.86, 0.76);
487	mWindow->getViewport(0)->setBackgroundColour(fadeColour);
488	//mSceneMgr->setFog(FOG_LINEAR, fadeColour, .001, 500, 1000);
489
490	// Create a skybox
491	mSceneMgr->setSkyBox(true, "Examples/CloudyNoonSkyBox", 50000, true);
492
493	// terrain creation
494	if (1)//\|\|msShowHillyTerrain)
495	{
496	std::string terrain_cfg("terrainCulling.cfg");
497	mSceneMgr->setWorldGeometry(terrain_cfg);
498
499	// was terrain loaded?
500	mSceneMgr->getOption("ShowTerrain", &msShowHillyTerrain);
501	}
502
503	// hack view point for terrain
504	if (msShowHillyTerrain)
505	{
506	Vector3 viewPoint(707, 5000, 528);
507	mCamNode->setPosition(viewPoint);
508	}
509
510	//////
511	//-- CEGUI setup
512	setupGui();
513
514	// Warning: In GL since we can't go higher than the window res
515	mSceneMgr->setShadowTextureSettings(1024, 2);
516	mSceneMgr->setShadowColour(ColourValue(0.5, 0.5, 0.5));
517
518	//////////////
519	//-- terrain content setup
520
521	// HACK: necessary to call once here for terrain initialisation
522	mSceneMgr->_renderScene(mCamera, mWindow->getViewport(0), true);
523
524	// ray query executor: needed to clamp to terrain
525	mRayQueryExecutor = new RayQueryExecutor(mSceneMgr);
526
527	mTerrainMinPos = EntityState::msMinPos = Vector3(0, 0, 0);
528	mTerrainMaxPos = EntityState::msMaxPos = Vector3(5000, 5000, 5000);
529
530	mTerrainContentGenerator = new TerrainContentGenerator(mSceneMgr);
531
532	// if no objects in file, we generate new objects
533	if (msShowHillyTerrain && !mTerrainContentGenerator->LoadObjects("objects.out"))
534	{
535	// the objects are generated randomly distributed over the terrain
536	if (1) generateScene(500, 0); // create robots
537	if (0) generateScene(100, 1); // create trees
538	if (1) generateScene(1000, 2); // create ninjas
539	}
540	}
541	//-----------------------------------------------------------------------
542	void TestCullingTerrainApplication::generateScene(int num, int objectType)
543	{
544	const float val = TerrainFrameListener::msObjectScales[objectType];
545	Vector3 scale(val, val, val);
546	const float maxHeight = 75;
547
548	// In order to provide much occlusion,
549	// height is restricted to maxHeight => no objects are created on peaks
550	mTerrainContentGenerator->SetMinPos(Vector3(mTerrainMinPos));
551	mTerrainContentGenerator->SetMaxPos(Vector3(mTerrainMaxPos.x, maxHeight, mTerrainMaxPos.z));
552
553	mTerrainContentGenerator->SetScale(scale);
554	mTerrainContentGenerator->SetOffset(TerrainFrameListener::msObjectTerrainOffsets[objectType]);
555	mTerrainContentGenerator->GenerateScene(num, TerrainFrameListener::msObjectCaptions[objectType]);
556
557	if (objectType != 0) // from our objects, only robot has animation phases
558	return;
559
560	EntityList *entList = mTerrainContentGenerator->GetGeneratedEntities();
561
562	/////////////
563	//-- add animation state for new robots (located at the end of the list)
564
565	for (int i = (int)entList->size() - num; i < (int)entList->size(); ++i)
566	{
567	mEntityStates.push_back(new EntityState((*entList)[i],
568	EntityState::WAITING, Math::RangeRandom(0.5, 1.5)));
569	}
570
571	// release limitations on height => it is possible for the user to put single
572	// objects on peaks of the terrain (will be only few, not relevant for occlusion)
573	mTerrainContentGenerator->SetMaxPos(mTerrainMaxPos);
574	}
575	//-----------------------------------------------------------------------
576	void TestCullingTerrainApplication::updateAnimations(Real timeSinceLastFrame)
577	{
578	for (int i = 0; i < (int)mEntityStates.size(); ++i)
579	{
580	SceneNode *sn = mEntityStates[i]->GetEntity()->getParentSceneNode();
581
582	mEntityStates[i]->update(timeSinceLastFrame);
583
584	if (mEntityStates[i]->GetState() == EntityState::MOVING)
585	{
586	Clamp2Terrain(sn, 0); //sn->setNodeVisible(false);
587	}
588	}
589	}
590	//-----------------------------------------------------------------------
591	EntityStates &TestCullingTerrainApplication::getEntityStates()
592	{
593	return mEntityStates;
594	}
595	//-----------------------------------------------------------------------
596	void TestCullingTerrainApplication::setupGui()
597	{
598	#if OGRE103
599	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
600	false, 3000, ST_EXTERIOR_CLOSE);
601	#else
602	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
603	false, 3000, mSceneMgr);
604	#endif
605	mGUISystem = new CEGUI::System(mGUIRenderer);
606
607	// Mouse
608	CEGUI::SchemeManager::getSingleton().loadScheme((CEGUI::utf8*)"TaharezLook.scheme");
609	CEGUI::MouseCursor::getSingleton().setImage("TaharezLook", "MouseArrow");
610	mGUISystem->setDefaultMouseCursor((CEGUI::utf8*)"TaharezLook",
611	(CEGUI::utf8*)"MouseArrow");
612
613	CEGUI::MouseCursor::getSingleton().hide();
614	}
615	//-----------------------------------------------------------------------
616	void TestCullingTerrainApplication::createFrameListener()
617	{
618	mTerrainFrameListener =
619	new TerrainFrameListener(mWindow,
620	mCamera,
621	mSceneMgr,
622	mGUIRenderer,
623	mTerrainContentGenerator,
624	mVizCamera,
625	mCamNode,
626	mSunLight,
627	this);
628
629	mRoot->addFrameListener(mTerrainFrameListener);
630	}
631	//-----------------------------------------------------------------------
632	void TestCullingTerrainApplication::chooseSceneManager()
633	{
634	#ifdef OGRE_103
635	if (msShowHillyTerrain)
636	{
637	// Terrain scene manager
638	mSceneMgr = mRoot->getSceneManager(ST_EXTERIOR_CLOSE);
639	}
640	else
641	{ // octree scene manager
642	mSceneMgr = mRoot->getSceneManager(ST_GENERIC);
643	}
644	#else
645
646	mSceneMgr = mRoot->createSceneManager("OcclusionCullingSceneManager");
647
648	//mSceneMgr = mRoot->createSceneManager("TerrainSceneManager");
649	//mSceneMgr = mRoot->createSceneManager("OctreeSceneManager");
650
651	//mSceneMgr = mRoot->createSceneManager("KdTreeSceneManager");
652
653	#endif
654	}
655	//-----------------------------------------------------------------------
656	bool TestCullingTerrainApplication::Clamp2Terrain(SceneNode *node, int terrainOffs)
657	{
658	// clamp scene node to terrain
659	Vector3 pos = node->getPosition();
660	Vector3 queryResult;
661
662	if (mRayQueryExecutor->executeRayQuery(&queryResult,
663	Vector3(pos.x, MAX_HEIGHT, pos.z), Vector3::NEGATIVE_UNIT_Y))
664	{
665	node->setPosition(pos.x, queryResult.y + terrainOffs, pos.z);
666	return true;
667	}
668
669	return false;
670	}
671
672	//-----------------------------------------------------------------------
673	bool TestCullingTerrainApplication::Clamp2FloorPlane(const float dist)
674	{
675	// clamp to floor plane
676	RaySceneQuery *raySceneQuery = mSceneMgr->createRayQuery(
677	Ray(mCamNode->getPosition(), Vector3::NEGATIVE_UNIT_Y));
678
679	RaySceneQueryResult& qryResult = raySceneQuery->execute();
680
681	RaySceneQueryResult::iterator rit = qryResult.begin();
682	bool success = false;
683
684	float yVal = 0;
685	float minVal = 999999999999;
686
687	while (rit != qryResult.end() && rit->movable)
688	{
689	if (rit->movable->getName() != "PlayerCam")
690	{
691	// place on the ground object
692	yVal = rit->movable->getWorldBoundingBox().getCenter().y;
693	if (yVal < minVal)
694	minVal = yVal;
695
696	//std::stringstream d; d << "dist: " << dist << endl;
697	//Ogre::LogManager()
698	success = true;
699	}
700
701	++ rit;
702	}
703
704	// place on the ground object
705	if (success)
706	mCamNode->setPosition(
707	mCamNode->getPosition().x,
708	minVal + dist,
709	mCamNode->getPosition().z);
710
711	OGRE_DELETE(raySceneQuery);
712	return success;
713	}
714
715	//-----------------------------------------------------------------------
716	// splits strings containing multiple file names
717	static int SplitFilenames(const std::string str, std::vector<std::string> &filenames)
718	{
719	int pos = 0;
720
721	while(1)
722	{
723	int npos = (int)str.find(';', pos);
724
725	if (npos < 0 \|\| npos - pos < 1)
726	break;
727	filenames.push_back(std::string(str, pos, npos - pos));
728	pos = npos + 1;
729	}
730
731	filenames.push_back(std::string(str, pos, str.size() - pos));
732	return (int)filenames.size();
733	}
734	//-----------------------------------------------------------------------
735	bool TestCullingTerrainApplication::LoadScene(const String &filename)
736	{
737	using namespace std;
738	// use leaf nodes of the original spatial hierarchy as occludees
739	vector<string> filenames;
740	int files = SplitFilenames(filename, filenames);
741
742	std::stringstream d;
743	d << "number of input files: " << files << "\n";
744	LogManager::getSingleton().logMessage(d.str());
745
746	bool result = false;
747	vector<string>::const_iterator fit, fit_end = filenames.end();
748	int i = 0;
749
750	for (fit = filenames.begin(); fit != fit_end; ++ fit, ++ i)
751	{
752	const string fn = *fit;
753
754	if (strstr(fn.c_str(), ".iv") \|\| strstr(fn.c_str(), ".wrl"))
755	{
756	// load iv files
757	if (!LoadSceneIV(fn, mSceneMgr->getRootSceneNode(), i))
758	{
759	// terrain hack
760	//msShowHillyTerrain = true;
761	LogManager::getSingleton().logMessage("error loading scene => load terrain");
762	}
763	}
764	else if (strstr(filename.c_str(), ".dae"))
765	{
766	// load collada files
767	LoadSceneCollada(fn, mSceneMgr->getRootSceneNode(), i);
768	}
769	else //if (filename == "terrain")
770	{
771	// terrain hack
772	msShowHillyTerrain = true;
773	LogManager::getSingleton().logMessage("loading terrain");
774	}
775
776	result = true;
777	}
778
779	return result;
780	}
781	//-----------------------------------------------------------------------
782	bool TestCullingTerrainApplication::LoadViewCells(const String &filename)
783	{
784	// if not already loaded,
785	// the scene manager will load the view cells
786	return mSceneMgr->setOption("UseViewCells", filename.c_str());
787	}
788
789
790	/**********************************************************************/
791	/* VisualizationRenderTargetListener implementation */
792	/**********************************************************************/
793
794
795	//-----------------------------------------------------------------------
796	VisualizationRenderTargetListener::VisualizationRenderTargetListener(SceneManager *sceneMgr)
797	:RenderTargetListener(), mSceneMgr(sceneMgr)
798	{
799	}
800	//-----------------------------------------------------------------------
801	void VisualizationRenderTargetListener::preViewportUpdate(const RenderTargetViewportEvent &evt)
802	{
803	// visualization viewport
804	const bool showViz = evt.source->getZOrder() == VIZ_VIEWPORT_Z_ORDER;
805	const bool nShowViz = !showViz;
806
807	mSavedShadowTechnique = mSceneMgr->getShadowTechnique();
808	mSavedAmbientLight = mSceneMgr->getAmbientLight();
809
810	// -- ambient light must be full for visualization, shadows disabled
811	if (showViz)
812	{
813	mSceneMgr->setAmbientLight(ColourValue(1, 1, 1));
814	mSceneMgr->setShadowTechnique(SHADOWTYPE_NONE);
815	}
816
817	mSceneMgr->setOption("PrepareVisualization", &showViz);
818	mSceneMgr->setOption("SkyBoxEnabled", &nShowViz);
819
820	RenderTargetListener::preViewportUpdate(evt);
821	}
822	//-----------------------------------------------------------------------
823	void VisualizationRenderTargetListener::postRenderTargetUpdate(const RenderTargetEvent &evt)
824	{
825	// reset values
826	mSceneMgr->setShadowTechnique(mSavedShadowTechnique);
827	mSceneMgr->setAmbientLight(mSavedAmbientLight);
828
829	RenderTargetListener::postRenderTargetUpdate(evt);
830	}
831	//-----------------------------------------------------------------------
832	INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
833	{
834	// Create application object
835	TestCullingTerrainApplication app;
836
837	try
838	{
839	app.go();
840	}
841	catch( Ogre::Exception& e )
842	{
843	MessageBox( NULL, e.getFullDescription().c_str(),
844	"An exception has occured!", MB_OK \| MB_ICONERROR \| MB_TASKMODAL);
845	}
846
847	return 0;
848	}

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