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source: GTP/trunk/App/Demos/Vis/HillyTerrain/OGRE/TestCullingTerrainApplication.cpp @ 1816

Revision 1816, 25.2 KB checked in by mattausch, 17 years ago (diff)
changed scenemanager: options are directly given to it

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	if (!LoadScene(mFilename))
251	{
252	LogManager::getSingleton().logMessage("error loading scene");
253	}
254
255	// set camera position accordingly
256	mCamNode->setPosition(mInitialPosition);
257	}
258	//-----------------------------------------------------------------------
259	TestCullingTerrainApplication::~TestCullingTerrainApplication()
260	{
261	OGRE_DELETE(mTerrainContentGenerator);
262	OGRE_DELETE(mRayQueryExecutor);
263	OGRE_DELETE(mIVReader);
264
265	deleteEntityStates();
266	}
267	//-----------------------------------------------------------------------
268	void TestCullingTerrainApplication::deleteEntityStates()
269	{
270	for (int i = 0; i < (int)mEntityStates.size(); ++i)
271	{
272	OGRE_DELETE(mEntityStates[i]);
273	}
274
275	mEntityStates.clear();
276	}
277	//-----------------------------------------------------------------------
278	void TestCullingTerrainApplication::createCamera()
279	{
280	// create the camera
281	mCamera = mSceneMgr->createCamera("PlayerCam");
282
283	/** set a nice viewpoint
284	* we use a camera node here and apply all transformations on it instead
285	* of applying all transformations directly to the camera
286	* because then the camera is displayed correctly in the visualization
287	*/
288	mCamNode = mSceneMgr->getRootSceneNode()->
289	createChildSceneNode("CamNode1", Vector3(707, 5000, 528));
290
291	mCamNode->setOrientation(Quaternion(-0.3486, 0.0122, 0.9365, 0.0329));
292	mCamNode->attachObject(mCamera);
293
294	///////////////////
295	//-- create visualization camera
296
297	mVizCamera = mSceneMgr->createCamera("VizCam");
298	mVizCamera->setPosition(mCamNode->getPosition());
299
300	mVizCamera->setNearClipDistance(1);
301	mCamera->setNearClipDistance(1);
302
303	// infinite far plane?
304	if (mRoot->getRenderSystem()->getCapabilities()->hasCapability(RSC_INFINITE_FAR_PLANE))
305	{
306	mVizCamera->setFarClipDistance(0);
307	mCamera->setFarClipDistance(0);
308	}
309	else
310	{
311	mVizCamera->setFarClipDistance(20000);
312	mCamera->setFarClipDistance(20000);
313	}
314	}
315
316	//-----------------------------------------------------------------------
317	bool TestCullingTerrainApplication::setup()
318	{
319	bool carryOn = ExampleApplication::setup();
320
321	if (carryOn)
322	createRenderTargetListener();
323
324	return carryOn;
325	}
326	//-----------------------------------------------------------------------
327	void TestCullingTerrainApplication::createRenderTargetListener()
328	{
329	mWindow->addListener(new VisualizationRenderTargetListener(mSceneMgr));
330	}
331	//-----------------------------------------------------------------------
332	bool TestCullingTerrainApplication::LoadSceneCollada(const String &filename,
333	SceneNode *root,
334	const int index)
335	{
336	#if COLLADA
337	// Collada
338	ColladaDocument *daeDoc = new ColladaDocument(mSceneMgr);
339
340	String daeName = filename;
341	//if (daeName.empty())
342	// daeName = "City_1500.dae";
343
344	// default directory
345	//daeName.insert(0, "../../media/models/collada/City");
346	LogManager::getSingleton().logMessage("ColladaDocument - import started");
347
348	// full import
349	if (daeDoc->doImport(daeName))
350	{
351	LogManager::getSingleton().logMessage("yuppi");
352	/**
353	* build up scene
354	* if you only want a specific part of the scene graph, you must fetch a scene node
355	* by its unique node name and give it as parameter
356	* e.g.
357	* ColladaSceneNode *box = mScene->getNode("Box2");
358	* if (box != NULL) box->createOgreInstance(NULL);
359	*/
360	daeDoc->getScene()->createOgreInstance(NULL);
361
362	// everything is loaded, we do not need the collada document anymore
363	delete daeDoc;
364
365	return true;
366	}
367	else
368	{
369	LogManager::getSingleton().logMessage("ColladaDocument - import failed");
370	return false;
371	}
372	#endif
373	return true;
374	}
375	//-----------------------------------------------------------------------
376	bool TestCullingTerrainApplication::LoadSceneIV(const String &filename,
377	SceneNode *root,
378	const int index)
379	{
380	mIVReader = new IVReader();
381
382	Timer *timer = PlatformManager::getSingleton().createTimer();
383	timer->reset();
384
385	if (1)
386	{
387	std::string logFilename = "IVLog" + Ogre::StringConverter().toString(index) + ".log";
388
389	Log *log = LogManager::getSingleton().createLog(logFilename);
390	mIVReader->setLog(log);
391	}
392
393	//viennaNode->translate(Vector3(-300, -300, 0));
394
395	if (mIVReader->loadFile(filename.c_str()))
396	{
397	SceneNode *node = root->createChildSceneNode("IVSceneNode" + index);
398
399	mIVReader->buildTree(mSceneMgr, node);
400
401	mIVReader->collapse();
402	OGRE_DELETE(mIVReader);
403
404	std::stringstream d;
405	d << "loaded " << filename << " in " << timer->getMilliseconds() * 1e-3 << " secs";
406	LogManager::getSingleton().logMessage(d.str());
407
408	PlatformManager::getSingleton().destroyTimer(timer);
409
410	//-- bake into static geometry
411	if (USE_STATIC_GEOMETRY)
412	{
413	BakeSceneIntoStaticGeometry("staticVienna", "Vienna");
414	}
415
416	return true;
417	}
418
419	return false;
420	}
421	//--------------------------------------------------------
422	void TestCullingTerrainApplication::BakeSceneIntoStaticGeometry(const String &staticGeomName,
423	const String &nodeName)
424	{
425	#if OGRE_103
426	// note: different static geom for roofs, roads, ..., becazse they have same material
427	StaticGeometry *staticGeom = mSceneMgr->createStaticGeometry(staticGeomName);
428
429	// note: looping over entities here. why does scene node not work?
430	SceneManager::EntityIterator it = mSceneMgr->getEntityIterator();
431	while (it.hasMoreElements())
432	{
433	Entity *ent = it.getNext();
434	ent->setVisible(false);
435	staticGeom->addEntity(ent, ent->getParentSceneNode()->getPosition());
436	}
437
438	staticGeom->setRegionDimensions(Vector3(100,100,100));
439	staticGeom->build();
440
441	// cleanup node
442	//wallsNode->detachAllObjects();
443
444	//roofsNode->detachAllObjects();
445	//roadsNode->detachAllObjects();
446	//planeNode->detachAllObjects();
447
448	//viennaNode->removeChild("Walls");
449	mSceneMgr->destroySceneNode(nodeName);
450	#endif
451	}
452	//--------------------------------------------------------
453	void TestCullingTerrainApplication::createScene()
454	{
455	/////////
456	//-- load scene
457	loadConfig("terrainCulling.cfg");
458
459	/////////////////////////////////////
460
461	// Set ambient light
462	mAmbientLight = ColourValue(0.5, 0.5, 0.5);
463	mSceneMgr->setAmbientLight(mAmbientLight);
464
465	//-- create light
466	mSunLight = mSceneMgr->createLight("SunLight");
467	mSunLight->setType(Light::LT_DIRECTIONAL);
468	//mSunLight->setType(Light::LT_SPOTLIGHT);
469	//mSunLight->setSpotlightRange(Degree(30), Degree(50));
470
471	mSunLight->setPosition(707, 2000, 500);
472	mSunLight->setCastShadows(true);
473
474	// set light angle not too small over the surface,
475	// otherwise shadows textures will be broken
476	Vector3 dir(0.5, 1, 0.5);
477	dir.normalise();
478	mSunLight->setDirection(dir);
479	//mSunLight->setDirection(Vector3::NEGATIVE_UNIT_Y);
480	mSunLight->setDiffuseColour(1, 1, 1);
481	mSunLight->setSpecularColour(1, 1, 1);
482
483	// -- Fog
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", 5000, true);
492
493	// terrain creation
494	if (msShowHillyTerrain)
495	{
496	std::string terrain_cfg("terrain.cfg");
497	#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE
498	terrain_cfg = mResourcePath + terrain_cfg;
499	#endif
500	mSceneMgr->setWorldGeometry(terrain_cfg);
501	}
502
503	//////
504	//-- CEGUI setup
505	setupGui();
506
507	// occluder plane to test visibility
508	if (0)
509	{
510	Plane plane;
511	plane.normal = Vector3::UNIT_Y;
512	plane.d = -60;
513
514	MeshManager::getSingleton().createPlane("Myplane",
515	ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME, plane,
516	5000,5000,100,100,true,1,5,5,Vector3::UNIT_Z);
517
518	Entity* pPlaneEnt = mSceneMgr->createEntity( "plane", "Myplane" );
519	pPlaneEnt->setMaterialName("Examples/Rockwall");
520	pPlaneEnt->setCastShadows(true);
521	mSceneMgr->getRootSceneNode()->createChildSceneNode()->attachObject(pPlaneEnt);
522	}
523
524	// Warning: In GL since we can't go higher than the window res
525	mSceneMgr->setShadowTextureSettings(1024, 2);
526	mSceneMgr->setShadowColour(ColourValue(0.5, 0.5, 0.5));
527
528	//////////////
529	//-- terrain content setup
530
531	// HACK: necessary to call once here for terrain initialisation
532	mSceneMgr->_renderScene(mCamera, mWindow->getViewport(0), true);
533
534	// ray query executor: needed to clamp to terrain
535	mRayQueryExecutor = new RayQueryExecutor(mSceneMgr);
536
537	mTerrainMinPos = EntityState::msMinPos = Vector3(0, 0, 0);
538	mTerrainMaxPos = EntityState::msMaxPos = Vector3(5000, 5000, 5000);
539
540	mTerrainContentGenerator = new TerrainContentGenerator(mSceneMgr);
541
542	if (!msShowHillyTerrain)
543	return;
544
545	// if no objects in file, we generate new objects
546	if (!mTerrainContentGenerator->LoadObjects("objects.out"))
547	{
548	// the objects are generated randomly distributed over the terrain
549	if (1) generateScene(1500, 0); // create robots
550	if (0) generateScene(100, 1); // create trees
551	if (0) generateScene(100, 2); // create ninjas
552	}
553	}
554	//-----------------------------------------------------------------------
555	void TestCullingTerrainApplication::generateScene(int num, int objectType)
556	{
557	float val = TerrainFrameListener::msObjectScales[objectType];
558	Vector3 scale(val, val, val);
559	const float maxHeight = 75;
560
561	// In order to provide much occlusion,
562	// height is restricted to maxHeight => no objects are created on peaks
563	mTerrainContentGenerator->SetMinPos(Vector3(mTerrainMinPos));
564	mTerrainContentGenerator->SetMaxPos(Vector3(mTerrainMaxPos.x, maxHeight, mTerrainMaxPos.z));
565
566	//std::stringstream d; d << "objscale: " << scale[0];
567	//Ogre::LogManager::getSingleton().logMessage(d.str());
568
569	mTerrainContentGenerator->SetScale(scale);
570	mTerrainContentGenerator->SetOffset(TerrainFrameListener::msObjectTerrainOffsets[objectType]);
571	mTerrainContentGenerator->GenerateScene(num, TerrainFrameListener::msObjectCaptions[objectType]);
572
573	if (objectType != 0) // from our objects, only robot has animation phases
574	return;
575
576	EntityList *entList = mTerrainContentGenerator->GetGeneratedEntities();
577
578	//-- add animation state for new robots (located at the end of the list)
579	for (int i = (int)entList->size() - num; i < (int)entList->size(); ++i)
580	{
581	mEntityStates.push_back(new EntityState((*entList)[i],
582	EntityState::WAITING, Math::RangeRandom(0.5, 1.5)));
583	}
584
585	// release limitations on height => it is possible for the user to put single
586	// objects on peaks of the terrain (will be only few, not relevant for occlusion)
587	mTerrainContentGenerator->SetMaxPos(mTerrainMaxPos);
588	}
589	//-----------------------------------------------------------------------
590	void TestCullingTerrainApplication::updateAnimations(Real timeSinceLastFrame)
591	{
592	for (int i = 0; i < (int)mEntityStates.size(); ++i)
593	{
594	SceneNode *sn = mEntityStates[i]->GetEntity()->getParentSceneNode();
595
596	mEntityStates[i]->update(timeSinceLastFrame);
597
598	if (mEntityStates[i]->GetState() == EntityState::MOVING)
599	{
600	Clamp2Terrain(sn, 0); //sn->setNodeVisible(false);
601	}
602	}
603	}
604	//-----------------------------------------------------------------------
605	EntityStates &TestCullingTerrainApplication::getEntityStates()
606	{
607	return mEntityStates;
608	}
609	//-----------------------------------------------------------------------
610	void TestCullingTerrainApplication::setupGui()
611	{
612	#if OGRE103
613	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
614	false, 3000, ST_EXTERIOR_CLOSE);
615	#else
616	mGUIRenderer = new CEGUI::OgreCEGUIRenderer(mWindow, Ogre::RENDER_QUEUE_OVERLAY,
617	false, 3000, mSceneMgr);
618	#endif
619	mGUISystem = new CEGUI::System(mGUIRenderer);
620
621	// Mouse
622	CEGUI::SchemeManager::getSingleton().loadScheme((CEGUI::utf8*)"TaharezLook.scheme");
623	CEGUI::MouseCursor::getSingleton().setImage("TaharezLook", "MouseArrow");
624	mGUISystem->setDefaultMouseCursor((CEGUI::utf8*)"TaharezLook",
625	(CEGUI::utf8*)"MouseArrow");
626
627	CEGUI::MouseCursor::getSingleton().hide();
628	}
629	//-----------------------------------------------------------------------
630	void TestCullingTerrainApplication::createFrameListener()
631	{
632	mTerrainFrameListener =
633	new TerrainFrameListener(mWindow,
634	mCamera,
635	mSceneMgr,
636	mGUIRenderer,
637	mTerrainContentGenerator,
638	mVizCamera,
639	mCamNode,
640	mSunLight,
641	this);
642
643	mRoot->addFrameListener(mTerrainFrameListener);
644	}
645	//-----------------------------------------------------------------------
646	void TestCullingTerrainApplication::chooseSceneManager()
647	{
648	#ifdef OGRE_103
649	if (msShowHillyTerrain)
650	{
651	// Terrain scene manager
652	mSceneMgr = mRoot->getSceneManager(ST_EXTERIOR_CLOSE);
653	}
654	else
655	{ // octree scene manager
656	mSceneMgr = mRoot->getSceneManager(ST_GENERIC);
657	}
658	#else
659	if (msShowHillyTerrain)
660	{
661	mSceneMgr = mRoot->createSceneManager("OcclusionCullingSceneManager");
662	//mSceneMgr = mRoot->createSceneManager("TerrainSceneManager");
663	//mSceneMgr = mRoot->createSceneManager("KdTreeSceneManager");
664	}
665	else
666	{
667	mSceneMgr = mRoot->createSceneManager("OcclusionCullingSceneManager");
668	//mSceneMgr = mRoot->createSceneManager("OctreeSceneManager");
669	//mSceneMgr = mRoot->createSceneManager("KdTreeSceneManager");
670	}
671
672	#endif
673	}
674	//-----------------------------------------------------------------------
675	bool TestCullingTerrainApplication::Clamp2Terrain(SceneNode *node, int terrainOffs)
676	{
677	// clamp scene node to terrain
678	Vector3 pos = node->getPosition();
679	Vector3 queryResult;
680
681	if (mRayQueryExecutor->executeRayQuery(&queryResult,
682	Vector3(pos.x, MAX_HEIGHT, pos.z), Vector3::NEGATIVE_UNIT_Y))
683	{
684	node->setPosition(pos.x, queryResult.y + terrainOffs, pos.z);
685	return true;
686	}
687
688	return false;
689	}
690
691	//-----------------------------------------------------------------------
692	bool TestCullingTerrainApplication::Clamp2FloorPlane(const float dist)
693	{
694	// clamp to floor plane
695	RaySceneQuery *raySceneQuery = mSceneMgr->createRayQuery(
696	Ray(mCamNode->getPosition(), Vector3::NEGATIVE_UNIT_Y));
697
698	RaySceneQueryResult& qryResult = raySceneQuery->execute();
699
700	RaySceneQueryResult::iterator rit = qryResult.begin();
701	bool success = false;
702	float yVal = 0;
703	float minVal = 999999999999;
704
705	while (rit != qryResult.end() && rit->movable)
706	{
707	if (rit->movable->getName() != "PlayerCam")
708	{
709	// place on the ground object
710	yVal = rit->movable->getWorldBoundingBox().getCenter().y;
711	if (yVal < minVal)
712	minVal = yVal;
713
714	//std::stringstream d; d << "dist: " << dist << endl;
715	//Ogre::LogManager()
716	success = true;
717	}
718
719	++ rit;
720	}
721
722	// place on the ground object
723	if (success)
724	mCamNode->setPosition(
725	mCamNode->getPosition().x,
726	minVal + dist,
727	mCamNode->getPosition().z);
728
729	OGRE_DELETE(raySceneQuery);
730	return success;
731	}
732
733	//-----------------------------------------------------------------------
734	// splits strings containing multiple file names
735	static int SplitFilenames(const std::string str, std::vector<std::string> &filenames)
736	{
737	int pos = 0;
738
739	while(1)
740	{
741	int npos = (int)str.find(';', pos);
742
743	if (npos < 0 \|\| npos - pos < 1)
744	break;
745	filenames.push_back(std::string(str, pos, npos - pos));
746	pos = npos + 1;
747	}
748
749	filenames.push_back(std::string(str, pos, str.size() - pos));
750	return (int)filenames.size();
751	}
752	//-----------------------------------------------------------------------
753	bool TestCullingTerrainApplication::LoadScene(const String &filename)
754	{
755	using namespace std;
756	// use leaf nodes of the original spatial hierarchy as occludees
757	vector<string> filenames;
758	int files = SplitFilenames(filename, filenames);
759
760	std::stringstream d;
761	d << "number of input files: " << files << "\n";
762	LogManager::getSingleton().logMessage(d.str());
763
764	bool result = false;
765	vector<string>::const_iterator fit, fit_end = filenames.end();
766	int i = 0;
767
768	for (fit = filenames.begin(); fit != fit_end; ++ fit, ++ i)
769	{
770	const string fn = *fit;
771
772	if (strstr(fn.c_str(), ".iv") \|\| strstr(fn.c_str(), ".wrl"))
773	{
774	// load iv files
775	if (!LoadSceneIV(fn, mSceneMgr->getRootSceneNode(), i))
776	{
777	// terrain hack
778	msShowHillyTerrain = true;
779	LogManager::getSingleton().logMessage("error loading scene => load terrain");
780	}
781	}
782	else if (strstr(filename.c_str(), ".dae"))
783	{
784	// load collada files
785	LoadSceneCollada(fn, mSceneMgr->getRootSceneNode(), i);
786	}
787	else //if (filename == "terrain")
788	{
789	// terrain hack
790	msShowHillyTerrain = true;
791	LogManager::getSingleton().logMessage("loading terrain");
792	}
793
794	result = true;
795	}
796
797	return result;
798	}
799	//-----------------------------------------------------------------------
800	bool TestCullingTerrainApplication::LoadViewCells(const String &filename)
801	{
802	LogManager::getSingleton().logMessage("loading view cells");
803
804	//-- the actual loading happens here
805	return mSceneMgr->setOption("LoadViewCells", filename.c_str());
806	}
807
808
809	/**********************************************************************/
810	/* VisualizationRenderTargetListener implementation */
811	/**********************************************************************/
812
813
814	//-----------------------------------------------------------------------
815	VisualizationRenderTargetListener::VisualizationRenderTargetListener(SceneManager *sceneMgr)
816	:RenderTargetListener(), mSceneMgr(sceneMgr)
817	{
818	}
819	//-----------------------------------------------------------------------
820	void VisualizationRenderTargetListener::preViewportUpdate(const RenderTargetViewportEvent &evt)
821	{
822	// visualization viewport
823	const bool showViz = evt.source->getZOrder() == VIZ_VIEWPORT_Z_ORDER;
824	const bool nShowViz = !showViz;
825
826	mSavedShadowTechnique = mSceneMgr->getShadowTechnique();
827	mSavedAmbientLight = mSceneMgr->getAmbientLight();
828
829	// -- ambient light must be full for visualization, shadows disabled
830	if (showViz)
831	{
832	mSceneMgr->setAmbientLight(ColourValue(1, 1, 1));
833	mSceneMgr->setShadowTechnique(SHADOWTYPE_NONE);
834	}
835
836	mSceneMgr->setOption("PrepareVisualization", &showViz);
837	mSceneMgr->setOption("SkyBoxEnabled", &nShowViz);
838
839	RenderTargetListener::preViewportUpdate(evt);
840	}
841	//-----------------------------------------------------------------------
842	void VisualizationRenderTargetListener::postRenderTargetUpdate(const RenderTargetEvent &evt)
843	{
844	// reset values
845	mSceneMgr->setShadowTechnique(mSavedShadowTechnique);
846	mSceneMgr->setAmbientLight(mSavedAmbientLight);
847
848	RenderTargetListener::postRenderTargetUpdate(evt);
849	}
850	//-----------------------------------------------------------------------
851	INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR strCmdLine, INT )
852	{
853	// Create application object
854	TestCullingTerrainApplication app;
855
856	try
857	{
858	app.go();
859	}
860	catch( Ogre::Exception& e )
861	{
862	MessageBox( NULL, e.getFullDescription().c_str(),
863	"An exception has occured!", MB_OK \| MB_ICONERROR \| MB_TASKMODAL);
864	}
865
866	return 0;
867	}

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