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source: GTP/trunk/App/Demos/Vis/HillyTerrain/OGRE/TestCullingTerrainApplication.cpp @ 2501

Revision 2501, 23.6 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
28	/*************************************************************/
29	/* EntityState implementation */
30	/*************************************************************/
31
32
33	Vector3 EntityState::msMinPos = Vector3::ZERO;
34	Vector3 EntityState::msMaxPos = Vector3::ZERO;
35
36	EntityState::EntityState(Entity *ent, State entityState, Real speed):
37	mEntity(ent), mState(entityState), mAnimationSpeed(speed)
38	{
39	switch(entityState)
40	{
41	case MOVING:
42	mAnimationState = mEntity->getAnimationState("Walk");
43	break;
44	case WAITING:
45	mAnimationState = mEntity->getAnimationState("Idle");
46	break;
47	case STOP:
48	mAnimationState = NULL;
49	break;
50	default:
51	break;
52	}
53	// enable animation state
54	if (mAnimationState)
55	{
56	mAnimationState->setLoop(true);
57	mAnimationState->setEnabled(true);
58	}
59
60	mTimeElapsed = Math::RangeRandom(1, 5);
61	}
62	//-----------------------------------------------------------------------
63	EntityState::~EntityState()
64	{
65	mAnimationState = NULL;
66	mEntity = NULL;
67	}
68	//-----------------------------------------------------------------------
69	Entity *EntityState::GetEntity()
70	{
71	return mEntity;
72	}
73	//-----------------------------------------------------------------------
74	EntityState::State EntityState::GetState()
75	{
76	return mState;
77	}
78	//-----------------------------------------------------------------------
79	void EntityState::update(Real timeSinceLastFrame)
80	{
81	mTimeElapsed -= timeSinceLastFrame * mAnimationSpeed;
82
83	if (!mEntity \|\| !mAnimationState)
84	return;
85
86	if (mState == MOVING) // toggle between moving (longer) and waiting (short)
87	{
88	SceneNode *parent = mEntity->getParentSceneNode();
89
90	if (!parent)
91	return;
92
93	if (mTimeElapsed <= 0) // toggle animation state
94	{
95	if (mAnimationState->getAnimationName() == "Idle")
96	{
97	SetAnimationState("Walk", true);
98
99	mTimeElapsed = walk_duration; // walk for mTimeElapsed units
100
101	// choose random rotation
102	Radian rnd = Radian(Math::UnitRandom() * Math::PI * rotate_factor);
103
104	//mEntity->getParentSceneNode()->rotate();
105	parent->yaw(rnd);
106	}
107	else
108	{
109	SetAnimationState("Idle", true);
110	mTimeElapsed = wait_duration; // wait for mTimeElapsed seconds
111	}
112	}
113
114	if (mAnimationState->getAnimationName() == "Walk") // move forward
115	{
116	// store old position, just in case we get out of bounds
117	Vector3 oldPos = parent->getPosition();
118	parent->translate(parent->getLocalAxes(), Vector3(move_factor * mAnimationSpeed, 0, 0));
119
120	// HACK: if out of bounds => reset to old position and set animationstate to idle
121	if (OutOfBounds(parent))
122	{
123	parent->setPosition(oldPos);
124	SetAnimationState("Idle", true);
125
126	mTimeElapsed = wait_duration;
127	}
128	}
129	}
130
131	// add time to drive animation
132	mAnimationState->addTime(timeSinceLastFrame * mAnimationSpeed);
133	}
134	//-----------------------------------------------------------------------
135	void EntityState::SetAnimationState(String stateStr, bool loop)
136	{
137	if (!mEntity)
138	return;
139
140	mAnimationState = mEntity->getAnimationState(stateStr);
141	mAnimationState->setLoop(loop);
142	mAnimationState->setEnabled(true);
143	}
144	//-----------------------------------------------------------------------
145	bool EntityState::OutOfBounds(SceneNode *node)
146	{
147	Vector3 pos = node->getPosition();
148
149	if ((pos > msMinPos) && (pos < msMaxPos))
150	return false;
151
152	return true;
153	}
154
155
156
157	/********************************************************************/
158	/* TestCullingTerrainApplication implementation */
159	/********************************************************************/
160
161
162	TestCullingTerrainApplication::TestCullingTerrainApplication():
163	mTerrainContentGenerator(NULL),
164	mRayQueryExecutor(NULL),
165	mIVReader(NULL),
166	mFilename("terrain"),
167	mViewCellsFilename(""),
168	mAlgorithm(GtpVisibility::VisibilityEnvironment::COHERENT_HIERARCHICAL_CULLING)
169	{
170	}
171	//-------------------------------------------------------------------------
172	void TestCullingTerrainApplication::loadConfig(const String& filename)
173	{
174	// Set up the options
175	ConfigFile config;
176	String val;
177
178	config.load(filename);
179
180	std::stringstream d; d << "reading the config file from: " << filename;
181	LogManager::getSingleton().logMessage(d.str());
182
183	val = config.getSetting("Scene");
184
185	if (!val.empty())
186	{
187	mFilename = val.c_str();
188	d << "\nloading scene from file: " << mFilename;
189	LogManager::getSingleton().logMessage(d.str());
190	}
191	}
192	//-----------------------------------------------------------------------
193	TestCullingTerrainApplication::~TestCullingTerrainApplication()
194	{
195	OGRE_DELETE(mTerrainContentGenerator);
196	OGRE_DELETE(mRayQueryExecutor);
197	OGRE_DELETE(mIVReader);
198
199	deleteEntityStates();
200	}
201	//-----------------------------------------------------------------------
202	void TestCullingTerrainApplication::deleteEntityStates()
203	{
204	for (int i = 0; i < (int)mEntityStates.size(); ++i)
205	{
206	OGRE_DELETE(mEntityStates[i]);
207	}
208
209	mEntityStates.clear();
210	}
211	//-----------------------------------------------------------------------
212	void TestCullingTerrainApplication::createCamera()
213	{
214	// create the camera
215	mCamera = mSceneMgr->createCamera("PlayerCam");
216
217	/** set a nice viewpoint
218	* we use a camera node here and apply all transformations on it instead
219	* of applying all transformations directly to the camera
220	* because then the camera is displayed correctly in the visualization
221	*/
222	// hack: vienna view point
223	Vector3 viewPoint(830, 300, -540);
224
225	mCamNode = mSceneMgr->getRootSceneNode()->
226	createChildSceneNode("CamNode1", viewPoint);
227
228	mCamNode->setOrientation(Quaternion(-0.3486, 0.0122, 0.9365, 0.0329));
229	mCamNode->attachObject(mCamera);
230
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
435	mSceneMgr->setWorldGeometry(terrain_cfg);
436
437	// was terrain loaded?
438	mSceneMgr->getOption("ShowTerrain", &msShowHillyTerrain);
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(500, 0); // create robots
475	if (0) generateScene(300, 1); // create ninjas
476	if (0) generateScene(1000, 2); // create trees
477	}
478
479	int maxDepth = 30;
480
481	mSceneMgr->setOption("BiHierarchyMaxDepth", &maxDepth);
482
483	int mode = 1;
484
485	mSceneMgr->setOption("EnhancedVisibility", &mode);
486	mSceneMgr->setOption("RebuildBiHierarchy", NULL);
487	mSceneMgr->setOption("RebuildKdTree", NULL);
488	}
489	//-----------------------------------------------------------------------
490	void TestCullingTerrainApplication::generateScene(int num, int objectType)
491	{
492	const float val = TerrainFrameListener::msObjectScales[objectType];
493	Vector3 scale(val, val, val);
494	const float maxHeight = 75;
495
496	// In order to provide much occlusion,
497	// height is restricted to maxHeight => no objects are created on peaks
498	mTerrainContentGenerator->SetMinPos(Vector3(mTerrainMinPos));
499	mTerrainContentGenerator->SetMaxPos(Vector3(mTerrainMaxPos.x, maxHeight, mTerrainMaxPos.z));
500
501	mTerrainContentGenerator->SetScale(scale);
502	mTerrainContentGenerator->SetOffset(TerrainFrameListener::msObjectTerrainOffsets[objectType]);
503	mTerrainContentGenerator->GenerateScene(num, TerrainFrameListener::msObjectCaptions[objectType]);
504
505	if (objectType != 0) // from our objects, only robot has animation phases
506	return;
507
508	EntityList *entList = mTerrainContentGenerator->GetGeneratedEntities();
509
510	/////////////
511	//-- add animation state for new robots (located at the end of the list)
512
513	for (size_t i = entList->size() - (unsigned int)num; i < entList->size(); ++ i)
514	{
515	mEntityStates.push_back(new EntityState((*entList)[i],
516	EntityState::WAITING, Math::RangeRandom(0.5, 1.5)));
517	}
518
519	// release limitations on height => it is possible for the user to put single
520	// objects on peaks of the terrain (will be only few, not relevant for occlusion)
521	mTerrainContentGenerator->SetMaxPos(mTerrainMaxPos);
522	}
523	//-----------------------------------------------------------------------
524	void TestCullingTerrainApplication::updateAnimations(Real timeSinceLastFrame)
525	{
526	for (int i = 0; i < (int)mEntityStates.size(); ++i)
527	{
528	SceneNode *sn = mEntityStates[i]->GetEntity()->getParentSceneNode();
529
530	mEntityStates[i]->update(timeSinceLastFrame);
531
532	if (mEntityStates[i]->GetState() == EntityState::MOVING)
533	{
534	Clamp2Terrain(sn, 0); //sn->setNodeVisible(false);
535	}
536	}
537	}
538	//-----------------------------------------------------------------------
539	EntityStates &TestCullingTerrainApplication::getEntityStates()
540	{
541	return mEntityStates;
542	}
543	//-----------------------------------------------------------------------
544	void TestCullingTerrainApplication::setupGui()
545	{
546	#if OGRE103
547	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
548	false, 3000, ST_EXTERIOR_CLOSE);
549	#else
550	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
551	false, 3000, mSceneMgr);
552	#endif
553	mGUISystem = new CEGUI::System(mGUIRenderer);
554
555	// Mouse
556	CEGUI::SchemeManager::getSingleton().loadScheme((CEGUI::utf8*)"TaharezLook.scheme");
557	CEGUI::MouseCursor::getSingleton().setImage("TaharezLook", "MouseArrow");
558	mGUISystem->setDefaultMouseCursor((CEGUI::utf8*)"TaharezLook",
559	(CEGUI::utf8*)"MouseArrow");
560
561	CEGUI::MouseCursor::getSingleton().hide();
562	}
563	//-----------------------------------------------------------------------
564	void TestCullingTerrainApplication::createFrameListener()
565	{
566	mTerrainFrameListener =
567	new TerrainFrameListener(mWindow,
568	mCamera,
569	mSceneMgr,
570	mGUIRenderer,
571	mTerrainContentGenerator,
572	mVizCamera,
573	mCamNode,
574	mSunLight,
575	this);
576
577	mTerrainFrameListener->setPriority(10);
578
579	mRoot->addFrameListener(mTerrainFrameListener);
580	}
581	//-----------------------------------------------------------------------
582	void TestCullingTerrainApplication::chooseSceneManager()
583	{
584	#ifdef OGRE_103
585	if (msShowHillyTerrain)
586	{
587	// Terrain scene manager
588	mSceneMgr = mRoot->getSceneManager(ST_EXTERIOR_CLOSE);
589	}
590	else
591	{ // octree scene manager
592	mSceneMgr = mRoot->getSceneManager(ST_GENERIC);
593	}
594	#else
595
596	mSceneMgr = mRoot->createSceneManager("OcclusionCullingSceneManager");
597
598	//mSceneMgr = mRoot->createSceneManager("TerrainSceneManager");
599	//mSceneMgr = mRoot->createSceneManager("OctreeSceneManager");
600	//mSceneMgr = mRoot->createSceneManager("BiHierarchySceneManager");
601	//mSceneMgr = mRoot->createSceneManager("BiTreeTerrainSceneManager");
602
603	bool useEnhancedVisibility = true;
604	mSceneMgr->setOption("EnhancedVisibility", &useEnhancedVisibility);
605	#endif
606	}
607	//-----------------------------------------------------------------------
608	bool TestCullingTerrainApplication::Clamp2Terrain(SceneNode *node, int terrainOffs)
609	{
610	// clamp scene node to terrain
611	Vector3 pos = node->getPosition();
612	Vector3 queryResult;
613
614	if (mRayQueryExecutor->executeRayQuery(&queryResult,
615	Vector3(pos.x, MAX_HEIGHT, pos.z), Vector3::NEGATIVE_UNIT_Y))
616	{
617	node->setPosition(pos.x, queryResult.y + terrainOffs, pos.z);
618	return true;
619	}
620
621	return false;
622	}
623
624	//-----------------------------------------------------------------------
625	bool TestCullingTerrainApplication::Clamp2FloorPlane(const float dist)
626	{
627	// clamp to floor plane
628	RaySceneQuery *raySceneQuery = mSceneMgr->createRayQuery(
629	Ray(mCamNode->getPosition(), Vector3::NEGATIVE_UNIT_Y));
630
631	RaySceneQueryResult& qryResult = raySceneQuery->execute();
632
633	RaySceneQueryResult::iterator rit = qryResult.begin();
634	bool success = false;
635
636	float yVal = 0;
637	float minVal = 999999999999;
638
639	// find next valid intersection
640	while (rit != qryResult.end() && rit->movable)
641	{
642	// camera is not a real world object
643	if (rit->movable->getName() != "PlayerCam")
644	{
645	// get the next intersection with a movable object
646	yVal = rit->movable->getWorldBoundingBox().getCenter().y;
647
648	if (yVal < minVal)
649	minVal = yVal;
650
651	success = true;
652	}
653
654	++ rit;
655	}
656
657	// place player on the ground object
658	if (success)
659	{
660	mCamNode->setPosition(mCamNode->getPosition().x,
661	minVal + dist,
662	mCamNode->getPosition().z);
663	}
664
665	OGRE_DELETE(raySceneQuery);
666	return success;
667	}
668
669	//-----------------------------------------------------------------------
670	// splits strings containing multiple file names
671	static int SplitFilenames(const std::string str, std::vector<std::string> &filenames)
672	{
673	int pos = 0;
674
675	while(1)
676	{
677	int npos = (int)str.find(';', pos);
678
679	if (npos < 0 \|\| npos - pos < 1)
680	break;
681	filenames.push_back(std::string(str, pos, npos - pos));
682	pos = npos + 1;
683	}
684
685	filenames.push_back(std::string(str, pos, str.size() - pos));
686	return (int)filenames.size();
687	}
688	//-----------------------------------------------------------------------
689	bool TestCullingTerrainApplication::LoadScene(const String &filename)
690	{
691	using namespace std;
692	// use leaf nodes of the original spatial hierarchy as occludees
693	vector<string> filenames;
694	int files = SplitFilenames(filename, filenames);
695
696	std::stringstream d;
697	d << "number of input files: " << files << "\n";
698	LogManager::getSingleton().logMessage(d.str());
699
700	bool result = false;
701	vector<string>::const_iterator fit, fit_end = filenames.end();
702	int i = 0;
703
704	for (fit = filenames.begin(); fit != fit_end; ++ fit, ++ i)
705	{
706	const string fn = *fit;
707
708	if (strstr(fn.c_str(), ".iv") \|\| strstr(fn.c_str(), ".wrl"))
709	{
710	// load iv files
711	if (!LoadSceneIV(fn, mSceneMgr->getRootSceneNode(), i))
712	{
713	// terrain hack
714	//msShowHillyTerrain = true;
715	LogManager::getSingleton().logMessage("error loading scene => load terrain");
716	}
717	}
718	else if (strstr(filename.c_str(), ".dae"))
719	{
720	// load collada files
721	LoadSceneCollada(fn, mSceneMgr->getRootSceneNode(), i);
722	}
723	else //if (filename == "terrain")
724	{
725	// terrain hack
726	msShowHillyTerrain = true;
727	LogManager::getSingleton().logMessage("loading terrain");
728	}
729
730	result = true;
731	}
732
733	return result;
734	}
735	//-----------------------------------------------------------------------
736	bool TestCullingTerrainApplication::LoadViewCells(const String &filename)
737	{
738	// if not already loaded,
739	// the scene manager will load the view cells
740	return mSceneMgr->setOption("UseViewCells", filename.c_str());
741	}
742
743
744
745	/**********************************************************************/
746	/* VisualizationRenderTargetListener implementation */
747	/**********************************************************************/
748
749	//-----------------------------------------------------------------------
750	VisualizationRenderTargetListener::VisualizationRenderTargetListener(SceneManager *sceneMgr)
751	:RenderTargetListener(), mSceneMgr(sceneMgr)
752	{
753	}
754	//-----------------------------------------------------------------------
755	void VisualizationRenderTargetListener::preViewportUpdate(const RenderTargetViewportEvent &evt)
756	{
757	// visualization viewport
758	const bool showViz = evt.source->getZOrder() == VIZ_VIEWPORT_Z_ORDER;
759	const bool nShowViz = !showViz;
760
761	mSavedShadowTechnique = mSceneMgr->getShadowTechnique();
762	mSavedAmbientLight = mSceneMgr->getAmbientLight();
763
764	// -- ambient light must be full for visualization, shadows disabled
765	if (showViz)
766	{
767	mSceneMgr->setAmbientLight(ColourValue(1, 1, 1));
768	mSceneMgr->setShadowTechnique(SHADOWTYPE_NONE);
769	}
770
771	mSceneMgr->setOption("PrepareVisualization", &showViz);
772	mSceneMgr->setOption("SkyBoxEnabled", &nShowViz);
773
774	RenderTargetListener::preViewportUpdate(evt);
775	}
776	//-----------------------------------------------------------------------
777	void VisualizationRenderTargetListener::postRenderTargetUpdate(const RenderTargetEvent &evt)
778	{
779	// reset values
780	mSceneMgr->setShadowTechnique(mSavedShadowTechnique);
781	mSceneMgr->setAmbientLight(mSavedAmbientLight);
782
783	RenderTargetListener::postRenderTargetUpdate(evt);
784	}
785	//-----------------------------------------------------------------------
786	INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
787	{
788	// Create application object
789	TestCullingTerrainApplication app;
790
791	try
792	{
793	app.go();
794	}
795	catch( Ogre::Exception& e )
796	{
797	MessageBox( NULL, e.getFullDescription().c_str(),
798	"An exception has occured!", MB_OK \| MB_ICONERROR \| MB_TASKMODAL);
799	}
800
801	return 0;
802	}

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