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source: GTP/trunk/App/Demos/Vis/HillyTerrain/OGRE/TestCullingTerrainApplication.cpp @ 2123

Revision 2123, 24.5 KB checked in by mattausch, 17 years ago (diff)
worded on obj loading in Ogre

Line
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 (!msShowHillyTerrain)
533	return;
534
535	// if no objects in file, we generate new objects
536	if (!mTerrainContentGenerator->LoadObjects("objects.out"))
537	{
538	// the objects are generated randomly distributed over the terrain
539	if (1) generateScene(1500, 0); // create robots
540	if (0) generateScene(100, 1); // create trees
541	if (0) generateScene(100, 2); // create ninjas
542	}
543	}
544	//-----------------------------------------------------------------------
545	void TestCullingTerrainApplication::generateScene(int num, int objectType)
546	{
547	const float val = TerrainFrameListener::msObjectScales[objectType];
548	Vector3 scale(val, val, val);
549	const float maxHeight = 75;
550
551	// In order to provide much occlusion,
552	// height is restricted to maxHeight => no objects are created on peaks
553	mTerrainContentGenerator->SetMinPos(Vector3(mTerrainMinPos));
554	mTerrainContentGenerator->SetMaxPos(Vector3(mTerrainMaxPos.x, maxHeight, mTerrainMaxPos.z));
555
556	mTerrainContentGenerator->SetScale(scale);
557	mTerrainContentGenerator->SetOffset(TerrainFrameListener::msObjectTerrainOffsets[objectType]);
558	mTerrainContentGenerator->GenerateScene(num, TerrainFrameListener::msObjectCaptions[objectType]);
559
560	if (objectType != 0) // from our objects, only robot has animation phases
561	return;
562
563	EntityList *entList = mTerrainContentGenerator->GetGeneratedEntities();
564
565	/////////////
566	//-- add animation state for new robots (located at the end of the list)
567
568	for (int i = (int)entList->size() - num; i < (int)entList->size(); ++i)
569	{
570	mEntityStates.push_back(new EntityState((*entList)[i],
571	EntityState::WAITING, Math::RangeRandom(0.5, 1.5)));
572	}
573
574	// release limitations on height => it is possible for the user to put single
575	// objects on peaks of the terrain (will be only few, not relevant for occlusion)
576	mTerrainContentGenerator->SetMaxPos(mTerrainMaxPos);
577	}
578	//-----------------------------------------------------------------------
579	void TestCullingTerrainApplication::updateAnimations(Real timeSinceLastFrame)
580	{
581	for (int i = 0; i < (int)mEntityStates.size(); ++i)
582	{
583	SceneNode *sn = mEntityStates[i]->GetEntity()->getParentSceneNode();
584
585	mEntityStates[i]->update(timeSinceLastFrame);
586
587	if (mEntityStates[i]->GetState() == EntityState::MOVING)
588	{
589	Clamp2Terrain(sn, 0); //sn->setNodeVisible(false);
590	}
591	}
592	}
593	//-----------------------------------------------------------------------
594	EntityStates &TestCullingTerrainApplication::getEntityStates()
595	{
596	return mEntityStates;
597	}
598	//-----------------------------------------------------------------------
599	void TestCullingTerrainApplication::setupGui()
600	{
601	#if OGRE103
602	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
603	false, 3000, ST_EXTERIOR_CLOSE);
604	#else
605	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
606	false, 3000, mSceneMgr);
607	#endif
608	mGUISystem = new CEGUI::System(mGUIRenderer);
609
610	// Mouse
611	CEGUI::SchemeManager::getSingleton().loadScheme((CEGUI::utf8*)"TaharezLook.scheme");
612	CEGUI::MouseCursor::getSingleton().setImage("TaharezLook", "MouseArrow");
613	mGUISystem->setDefaultMouseCursor((CEGUI::utf8*)"TaharezLook",
614	(CEGUI::utf8*)"MouseArrow");
615
616	CEGUI::MouseCursor::getSingleton().hide();
617	}
618	//-----------------------------------------------------------------------
619	void TestCullingTerrainApplication::createFrameListener()
620	{
621	mTerrainFrameListener =
622	new TerrainFrameListener(mWindow,
623	mCamera,
624	mSceneMgr,
625	mGUIRenderer,
626	mTerrainContentGenerator,
627	mVizCamera,
628	mCamNode,
629	mSunLight,
630	this);
631
632	mRoot->addFrameListener(mTerrainFrameListener);
633	}
634	//-----------------------------------------------------------------------
635	void TestCullingTerrainApplication::chooseSceneManager()
636	{
637	#ifdef OGRE_103
638	if (msShowHillyTerrain)
639	{
640	// Terrain scene manager
641	mSceneMgr = mRoot->getSceneManager(ST_EXTERIOR_CLOSE);
642	}
643	else
644	{ // octree scene manager
645	mSceneMgr = mRoot->getSceneManager(ST_GENERIC);
646	}
647	#else
648
649	mSceneMgr = mRoot->createSceneManager("OcclusionCullingSceneManager");
650	//mSceneMgr = mRoot->createSceneManager("TerrainSceneManager");
651	//mSceneMgr = mRoot->createSceneManager("OctreeSceneManager");
652
653	//mSceneMgr = mRoot->createSceneManager("KdTreeSceneManager");
654
655	#endif
656	}
657	//-----------------------------------------------------------------------
658	bool TestCullingTerrainApplication::Clamp2Terrain(SceneNode *node, int terrainOffs)
659	{
660	// clamp scene node to terrain
661	Vector3 pos = node->getPosition();
662	Vector3 queryResult;
663
664	if (mRayQueryExecutor->executeRayQuery(&queryResult,
665	Vector3(pos.x, MAX_HEIGHT, pos.z), Vector3::NEGATIVE_UNIT_Y))
666	{
667	node->setPosition(pos.x, queryResult.y + terrainOffs, pos.z);
668	return true;
669	}
670
671	return false;
672	}
673
674	//-----------------------------------------------------------------------
675	bool TestCullingTerrainApplication::Clamp2FloorPlane(const float dist)
676	{
677	// clamp to floor plane
678	RaySceneQuery *raySceneQuery = mSceneMgr->createRayQuery(
679	Ray(mCamNode->getPosition(), Vector3::NEGATIVE_UNIT_Y));
680
681	RaySceneQueryResult& qryResult = raySceneQuery->execute();
682
683	RaySceneQueryResult::iterator rit = qryResult.begin();
684	bool success = false;
685
686	float yVal = 0;
687	float minVal = 999999999999;
688
689	while (rit != qryResult.end() && rit->movable)
690	{
691	if (rit->movable->getName() != "PlayerCam")
692	{
693	// place on the ground object
694	yVal = rit->movable->getWorldBoundingBox().getCenter().y;
695	if (yVal < minVal)
696	minVal = yVal;
697
698	//std::stringstream d; d << "dist: " << dist << endl;
699	//Ogre::LogManager()
700	success = true;
701	}
702
703	++ rit;
704	}
705
706	// place on the ground object
707	if (success)
708	mCamNode->setPosition(
709	mCamNode->getPosition().x,
710	minVal + dist,
711	mCamNode->getPosition().z);
712
713	OGRE_DELETE(raySceneQuery);
714	return success;
715	}
716
717	//-----------------------------------------------------------------------
718	// splits strings containing multiple file names
719	static int SplitFilenames(const std::string str, std::vector<std::string> &filenames)
720	{
721	int pos = 0;
722
723	while(1)
724	{
725	int npos = (int)str.find(';', pos);
726
727	if (npos < 0 \|\| npos - pos < 1)
728	break;
729	filenames.push_back(std::string(str, pos, npos - pos));
730	pos = npos + 1;
731	}
732
733	filenames.push_back(std::string(str, pos, str.size() - pos));
734	return (int)filenames.size();
735	}
736	//-----------------------------------------------------------------------
737	bool TestCullingTerrainApplication::LoadScene(const String &filename)
738	{
739	using namespace std;
740	// use leaf nodes of the original spatial hierarchy as occludees
741	vector<string> filenames;
742	int files = SplitFilenames(filename, filenames);
743
744	std::stringstream d;
745	d << "number of input files: " << files << "\n";
746	LogManager::getSingleton().logMessage(d.str());
747
748	bool result = false;
749	vector<string>::const_iterator fit, fit_end = filenames.end();
750	int i = 0;
751
752	for (fit = filenames.begin(); fit != fit_end; ++ fit, ++ i)
753	{
754	const string fn = *fit;
755
756	if (strstr(fn.c_str(), ".iv") \|\| strstr(fn.c_str(), ".wrl"))
757	{
758	// load iv files
759	if (!LoadSceneIV(fn, mSceneMgr->getRootSceneNode(), i))
760	{
761	// terrain hack
762	//msShowHillyTerrain = true;
763	LogManager::getSingleton().logMessage("error loading scene => load terrain");
764	}
765	}
766	else if (strstr(filename.c_str(), ".dae"))
767	{
768	// load collada files
769	LoadSceneCollada(fn, mSceneMgr->getRootSceneNode(), i);
770	}
771	else //if (filename == "terrain")
772	{
773	// terrain hack
774	msShowHillyTerrain = true;
775	LogManager::getSingleton().logMessage("loading terrain");
776	}
777
778	result = true;
779	}
780
781	return result;
782	}
783	//-----------------------------------------------------------------------
784	bool TestCullingTerrainApplication::LoadViewCells(const String &filename)
785	{
786	// if not already loaded,
787	// the scene manager will load the view cells
788	return mSceneMgr->setOption("UseViewCells", filename.c_str());
789	}
790
791
792	/**********************************************************************/
793	/* VisualizationRenderTargetListener implementation */
794	/**********************************************************************/
795
796
797	//-----------------------------------------------------------------------
798	VisualizationRenderTargetListener::VisualizationRenderTargetListener(SceneManager *sceneMgr)
799	:RenderTargetListener(), mSceneMgr(sceneMgr)
800	{
801	}
802	//-----------------------------------------------------------------------
803	void VisualizationRenderTargetListener::preViewportUpdate(const RenderTargetViewportEvent &evt)
804	{
805	// visualization viewport
806	const bool showViz = evt.source->getZOrder() == VIZ_VIEWPORT_Z_ORDER;
807	const bool nShowViz = !showViz;
808
809	mSavedShadowTechnique = mSceneMgr->getShadowTechnique();
810	mSavedAmbientLight = mSceneMgr->getAmbientLight();
811
812	// -- ambient light must be full for visualization, shadows disabled
813	if (showViz)
814	{
815	mSceneMgr->setAmbientLight(ColourValue(1, 1, 1));
816	mSceneMgr->setShadowTechnique(SHADOWTYPE_NONE);
817	}
818
819	mSceneMgr->setOption("PrepareVisualization", &showViz);
820	mSceneMgr->setOption("SkyBoxEnabled", &nShowViz);
821
822	RenderTargetListener::preViewportUpdate(evt);
823	}
824	//-----------------------------------------------------------------------
825	void VisualizationRenderTargetListener::postRenderTargetUpdate(const RenderTargetEvent &evt)
826	{
827	// reset values
828	mSceneMgr->setShadowTechnique(mSavedShadowTechnique);
829	mSceneMgr->setAmbientLight(mSavedAmbientLight);
830
831	RenderTargetListener::postRenderTargetUpdate(evt);
832	}
833	//-----------------------------------------------------------------------
834	INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
835	{
836	// Create application object
837	TestCullingTerrainApplication app;
838
839	try
840	{
841	app.go();
842	}
843	catch( Ogre::Exception& e )
844	{
845	MessageBox( NULL, e.getFullDescription().c_str(),
846	"An exception has occured!", MB_OK \| MB_ICONERROR \| MB_TASKMODAL);
847	}
848
849	return 0;
850	}

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