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OgreVertexIndexData.cpp @ 5

Last change on this file since 5 was 5, checked in by anonymous, 17 years ago
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File size: 33.0 KB

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1	/*
2	-----------------------------------------------------------------------------
3	This source file is part of OGRE
4	(Object-oriented Graphics Rendering Engine)
5	For the latest info, see http://www.ogre3d.org/
6
7	Copyright (c) 2000-2006 Torus Knot Software Ltd
8	Also see acknowledgements in Readme.html
9
10	This program is free software; you can redistribute it and/or modify it under
11	the terms of the GNU Lesser General Public License as published by the Free Software
12	Foundation; either version 2 of the License, or (at your option) any later
13	version.
14
15	This program is distributed in the hope that it will be useful, but WITHOUT
16	ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
17	FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
18
19	You should have received a copy of the GNU Lesser General Public License along with
20	this program; if not, write to the Free Software Foundation, Inc., 59 Temple
21	Place - Suite 330, Boston, MA 02111-1307, USA, or go to
22	http://www.gnu.org/copyleft/lesser.txt.
23
24	You may alternatively use this source under the terms of a specific version of
25	the OGRE Unrestricted License provided you have obtained such a license from
26	Torus Knot Software Ltd.
27	-----------------------------------------------------------------------------
28	*/
29	#include "OgreStableHeaders.h"
30	#include "OgreVertexIndexData.h"
31	#include "OgreHardwareBufferManager.h"
32	#include "OgreHardwareVertexBuffer.h"
33	#include "OgreHardwareIndexBuffer.h"
34	#include "OgreVector3.h"
35	#include "OgreAxisAlignedBox.h"
36	#include "OgreRoot.h"
37	#include "OgreRenderSystem.h"
38	#include "OgreException.h"
39
40	namespace Ogre {
41
42	//-----------------------------------------------------------------------
43	VertexData::VertexData()
44	{
45	vertexBufferBinding = HardwareBufferManager::getSingleton().
46	createVertexBufferBinding();
47	vertexDeclaration = HardwareBufferManager::getSingleton().
48	createVertexDeclaration();
49	vertexCount = 0;
50	vertexStart = 0;
51	hwAnimDataItemsUsed = 0;
52
53	}
54	//-----------------------------------------------------------------------
55	VertexData::~VertexData()
56	{
57	HardwareBufferManager::getSingleton().
58	destroyVertexBufferBinding(vertexBufferBinding);
59	HardwareBufferManager::getSingleton().destroyVertexDeclaration(vertexDeclaration);
60
61	}
62	//-----------------------------------------------------------------------
63	VertexData* VertexData::clone(bool copyData) const
64	{
65	VertexData* dest = new VertexData();
66
67	// Copy vertex buffers in turn
68	const VertexBufferBinding::VertexBufferBindingMap& bindings =
69	this->vertexBufferBinding->getBindings();
70	VertexBufferBinding::VertexBufferBindingMap::const_iterator vbi, vbend;
71	vbend = bindings.end();
72	for (vbi = bindings.begin(); vbi != vbend; ++vbi)
73	{
74	HardwareVertexBufferSharedPtr srcbuf = vbi->second;
75	HardwareVertexBufferSharedPtr dstBuf;
76	if (copyData)
77	{
78	// create new buffer with the same settings
79	dstBuf =
80	HardwareBufferManager::getSingleton().createVertexBuffer(
81	srcbuf->getVertexSize(), srcbuf->getNumVertices(), srcbuf->getUsage(),
82	srcbuf->hasShadowBuffer());
83
84	// copy data
85	dstBuf->copyData(*srcbuf, 0, 0, srcbuf->getSizeInBytes(), true);
86	}
87	else
88	{
89	// don't copy, point at existing buffer
90	dstBuf = srcbuf;
91	}
92
93	// Copy binding
94	dest->vertexBufferBinding->setBinding(vbi->first, dstBuf);
95	}
96
97	// Basic vertex info
98	dest->vertexStart = this->vertexStart;
99	dest->vertexCount = this->vertexCount;
100	// Copy elements
101	const VertexDeclaration::VertexElementList elems =
102	this->vertexDeclaration->getElements();
103	VertexDeclaration::VertexElementList::const_iterator ei, eiend;
104	eiend = elems.end();
105	for (ei = elems.begin(); ei != eiend; ++ei)
106	{
107	dest->vertexDeclaration->addElement(
108	ei->getSource(),
109	ei->getOffset(),
110	ei->getType(),
111	ei->getSemantic(),
112	ei->getIndex() );
113	}
114
115	// Copy reference to hardware shadow buffer, no matter whether copy data or not
116	dest->hardwareShadowVolWBuffer = hardwareShadowVolWBuffer;
117
118	// copy anim data
119	dest->hwAnimationDataList = hwAnimationDataList;
120	dest->hwAnimDataItemsUsed = hwAnimDataItemsUsed;
121
122
123	return dest;
124	}
125	//-----------------------------------------------------------------------
126	void VertexData::prepareForShadowVolume(void)
127	{
128	/* NOTE
129	I would dearly, dearly love to just use a 4D position buffer in order to
130	store the extra 'w' value I need to differentiate between extruded and
131	non-extruded sections of the buffer, so that vertex programs could use that.
132	Hey, it works fine for GL. However, D3D9 in it's infinite stupidity, does not
133	support 4d position vertices in the fixed-function pipeline. If you use them,
134	you just see nothing. Since we can't know whether the application is going to use
135	fixed function or vertex programs, we have to stick to 3d position vertices and
136	store the 'w' in a separate 1D texture coordinate buffer, which is only used
137	when rendering the shadow.
138	*/
139
140	// Upfront, lets check whether we have vertex program capability
141	RenderSystem* rend = Root::getSingleton().getRenderSystem();
142	bool useVertexPrograms = false;
143	if (rend && rend->getCapabilities()->hasCapability(RSC_VERTEX_PROGRAM))
144	{
145	useVertexPrograms = true;
146	}
147
148
149	// Look for a position element
150	const VertexElement* posElem = vertexDeclaration->findElementBySemantic(VES_POSITION);
151	if (posElem)
152	{
153	size_t v;
154	unsigned posOldSource = posElem->getSource();
155
156	HardwareVertexBufferSharedPtr vbuf = vertexBufferBinding->getBuffer(posOldSource);
157	bool wasSharedBuffer = false;
158	// Are there other elements in the buffer except for the position?
159	if (vbuf->getVertexSize() > posElem->getSize())
160	{
161	// We need to create another buffer to contain the remaining elements
162	// Most drivers don't like gaps in the declaration, and in any case it's waste
163	wasSharedBuffer = true;
164	}
165	HardwareVertexBufferSharedPtr newPosBuffer, newRemainderBuffer;
166	if (wasSharedBuffer)
167	{
168	newRemainderBuffer = HardwareBufferManager::getSingleton().createVertexBuffer(
169	vbuf->getVertexSize() - posElem->getSize(), vbuf->getNumVertices(), vbuf->getUsage(),
170	vbuf->hasShadowBuffer());
171	}
172	// Allocate new position buffer, will be FLOAT3 and 2x the size
173	size_t oldVertexCount = vbuf->getNumVertices();
174	size_t newVertexCount = oldVertexCount * 2;
175	newPosBuffer = HardwareBufferManager::getSingleton().createVertexBuffer(
176	VertexElement::getTypeSize(VET_FLOAT3), newVertexCount, vbuf->getUsage(),
177	vbuf->hasShadowBuffer());
178
179	// Iterate over the old buffer, copying the appropriate elements and initialising the rest
180	float* pSrc;
181	unsigned char pBaseSrc = static_cast<unsigned char>(
182	vbuf->lock(HardwareBuffer::HBL_READ_ONLY));
183	// Point first destination pointer at the start of the new position buffer,
184	// the other one half way along
185	float pDest = static_cast<float>(newPosBuffer->lock(HardwareBuffer::HBL_DISCARD));
186	float* pDest2 = pDest + oldVertexCount * 3;
187
188	// Precalculate any dimensions of vertex areas outside the position
189	size_t prePosVertexSize = 0, postPosVertexSize, postPosVertexOffset;
190	unsigned char *pBaseDestRem = 0;
191	if (wasSharedBuffer)
192	{
193	pBaseDestRem = static_cast<unsigned char*>(
194	newRemainderBuffer->lock(HardwareBuffer::HBL_DISCARD));
195	prePosVertexSize = posElem->getOffset();
196	postPosVertexOffset = prePosVertexSize + posElem->getSize();
197	postPosVertexSize = vbuf->getVertexSize() - postPosVertexOffset;
198	// the 2 separate bits together should be the same size as the remainder buffer vertex
199	assert (newRemainderBuffer->getVertexSize() == prePosVertexSize + postPosVertexSize);
200
201	// Iterate over the vertices
202	for (v = 0; v < oldVertexCount; ++v)
203	{
204	// Copy position, into both buffers
205	posElem->baseVertexPointerToElement(pBaseSrc, &pSrc);
206	pDest++ = pDest2++ = *pSrc++;
207	pDest++ = pDest2++ = *pSrc++;
208	pDest++ = pDest2++ = *pSrc++;
209
210	// now deal with any other elements
211	// Basically we just memcpy the vertex excluding the position
212	if (prePosVertexSize > 0)
213	memcpy(pBaseDestRem, pBaseSrc, prePosVertexSize);
214	if (postPosVertexSize > 0)
215	memcpy(pBaseDestRem + prePosVertexSize,
216	pBaseSrc + postPosVertexOffset, postPosVertexSize);
217	pBaseDestRem += newRemainderBuffer->getVertexSize();
218
219	pBaseSrc += vbuf->getVertexSize();
220
221	} // next vertex
222	}
223	else
224	{
225	// Unshared buffer, can block copy the whole thing
226	memcpy(pDest, pBaseSrc, vbuf->getSizeInBytes());
227	memcpy(pDest2, pBaseSrc, vbuf->getSizeInBytes());
228	}
229
230	vbuf->unlock();
231	newPosBuffer->unlock();
232	if (wasSharedBuffer)
233	newRemainderBuffer->unlock();
234
235	// At this stage, he original vertex buffer is going to be destroyed
236	// So we should force the deallocation of any temporary copies
237	HardwareBufferManager::getSingleton()._forceReleaseBufferCopies(vbuf);
238
239	if (useVertexPrograms)
240	{
241	// Now it's time to set up the w buffer
242	hardwareShadowVolWBuffer = HardwareBufferManager::getSingleton().createVertexBuffer(
243	sizeof(float), newVertexCount, HardwareBuffer::HBU_STATIC_WRITE_ONLY, false);
244	// Fill the first half with 1.0, second half with 0.0
245	pDest = static_cast<float*>(
246	hardwareShadowVolWBuffer->lock(HardwareBuffer::HBL_DISCARD));
247	for (v = 0; v < oldVertexCount; ++v)
248	{
249	*pDest++ = 1.0f;
250	}
251	for (v = 0; v < oldVertexCount; ++v)
252	{
253	*pDest++ = 0.0f;
254	}
255	hardwareShadowVolWBuffer->unlock();
256	}
257
258	unsigned short newPosBufferSource;
259	if (wasSharedBuffer)
260	{
261	// Get the a new buffer binding index
262	newPosBufferSource= vertexBufferBinding->getNextIndex();
263	// Re-bind the old index to the remainder buffer
264	vertexBufferBinding->setBinding(posOldSource, newRemainderBuffer);
265	}
266	else
267	{
268	// We can just re-use the same source idex for the new position buffer
269	newPosBufferSource = posOldSource;
270	}
271	// Bind the new position buffer
272	vertexBufferBinding->setBinding(newPosBufferSource, newPosBuffer);
273
274	// Now, alter the vertex declaration to change the position source
275	// and the offsets of elements using the same buffer
276	VertexDeclaration::VertexElementList::const_iterator elemi =
277	vertexDeclaration->getElements().begin();
278	VertexDeclaration::VertexElementList::const_iterator elemiend =
279	vertexDeclaration->getElements().end();
280	unsigned short idx;
281	for(idx = 0; elemi != elemiend; ++elemi, ++idx)
282	{
283	if (&(*elemi) == posElem)
284	{
285	// Modify position to point at new position buffer
286	vertexDeclaration->modifyElement(
287	idx,
288	newPosBufferSource, // new source buffer
289	0, // no offset now
290	VET_FLOAT3,
291	VES_POSITION);
292	}
293	else if (wasSharedBuffer &&
294	elemi->getSource() == posOldSource &&
295	elemi->getOffset() > prePosVertexSize )
296	{
297	// This element came after position, remove the position's
298	// size
299	vertexDeclaration->modifyElement(
300	idx,
301	posOldSource, // same old source
302	elemi->getOffset() - posElem->getSize(), // less offset now
303	elemi->getType(),
304	elemi->getSemantic(),
305	elemi->getIndex());
306
307	}
308
309	}
310
311
312	// Note that we don't change vertexCount, because the other buffer(s) are still the same
313	// size after all
314
315
316	}
317	}
318	//-----------------------------------------------------------------------
319	void VertexData::reorganiseBuffers(VertexDeclaration* newDeclaration, const BufferUsageList& bufferUsages)
320	{
321	// Firstly, close up any gaps in the buffer sources which might have arisen
322	newDeclaration->closeGapsInSource();
323
324	// Build up a list of both old and new elements in each buffer
325	unsigned short buf = 0;
326	std::vector<void*> oldBufferLocks;
327	std::vector<size_t> oldBufferVertexSizes;
328	std::vector<void*> newBufferLocks;
329	std::vector<size_t> newBufferVertexSizes;
330	VertexBufferBinding* newBinding =
331	HardwareBufferManager::getSingleton().createVertexBufferBinding();
332	const VertexBufferBinding::VertexBufferBindingMap& oldBindingMap = vertexBufferBinding->getBindings();
333	VertexBufferBinding::VertexBufferBindingMap::const_iterator itBinding;
334
335	// Pre-allocate old buffer locks
336	if (!oldBindingMap.empty())
337	{
338	size_t count = oldBindingMap.rbegin()->first + 1;
339	oldBufferLocks.resize(count);
340	oldBufferVertexSizes.resize(count);
341	}
342	// Lock all the old buffers for reading
343	for (itBinding = oldBindingMap.begin(); itBinding != oldBindingMap.end(); ++itBinding)
344	{
345	assert(itBinding->second->getNumVertices() >= vertexCount);
346
347	oldBufferVertexSizes[itBinding->first] =
348	itBinding->second->getVertexSize();
349	oldBufferLocks[itBinding->first] =
350	itBinding->second->lock(
351	HardwareBuffer::HBL_READ_ONLY);
352	}
353
354	// Create new buffers and lock all for writing
355	buf = 0;
356	while (!newDeclaration->findElementsBySource(buf).empty())
357	{
358	size_t vertexSize = newDeclaration->getVertexSize(buf);
359
360	HardwareVertexBufferSharedPtr vbuf =
361	HardwareBufferManager::getSingleton().createVertexBuffer(
362	vertexSize,
363	vertexCount,
364	bufferUsages[buf]);
365	newBinding->setBinding(buf, vbuf);
366
367	newBufferVertexSizes.push_back(vertexSize);
368	newBufferLocks.push_back(
369	vbuf->lock(HardwareBuffer::HBL_DISCARD));
370	buf++;
371	}
372
373	// Map from new to old elements
374	typedef std::map<const VertexElement, const VertexElement> NewToOldElementMap;
375	NewToOldElementMap newToOldElementMap;
376	const VertexDeclaration::VertexElementList& newElemList = newDeclaration->getElements();
377	VertexDeclaration::VertexElementList::const_iterator ei, eiend;
378	eiend = newElemList.end();
379	for (ei = newElemList.begin(); ei != eiend; ++ei)
380	{
381	// Find corresponding old element
382	const VertexElement* oldElem =
383	vertexDeclaration->findElementBySemantic(
384	(ei).getSemantic(), (ei).getIndex());
385	if (!oldElem)
386	{
387	// Error, cannot create new elements with this method
388	OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND,
389	"Element not found in old vertex declaration",
390	"VertexData::reorganiseBuffers");
391	}
392	newToOldElementMap[&(*ei)] = oldElem;
393	}
394	// Now iterate over the new buffers, pulling data out of the old ones
395	// For each vertex
396	for (size_t v = 0; v < vertexCount; ++v)
397	{
398	// For each (new) element
399	for (ei = newElemList.begin(); ei != eiend; ++ei)
400	{
401	const VertexElement* newElem = &(*ei);
402	NewToOldElementMap::iterator noi = newToOldElementMap.find(newElem);
403	const VertexElement* oldElem = noi->second;
404	unsigned short oldBufferNo = oldElem->getSource();
405	unsigned short newBufferNo = newElem->getSource();
406	void* pSrcBase = static_cast<void*>(
407	static_cast<unsigned char*>(oldBufferLocks[oldBufferNo])
408	+ v * oldBufferVertexSizes[oldBufferNo]);
409	void* pDstBase = static_cast<void*>(
410	static_cast<unsigned char*>(newBufferLocks[newBufferNo])
411	+ v * newBufferVertexSizes[newBufferNo]);
412	void pSrc, pDst;
413	oldElem->baseVertexPointerToElement(pSrcBase, &pSrc);
414	newElem->baseVertexPointerToElement(pDstBase, &pDst);
415
416	memcpy(pDst, pSrc, newElem->getSize());
417
418	}
419	}
420
421	// Unlock all buffers
422	for (itBinding = oldBindingMap.begin(); itBinding != oldBindingMap.end(); ++itBinding)
423	{
424	itBinding->second->unlock();
425	}
426	for (buf = 0; buf < newBinding->getBufferCount(); ++buf)
427	{
428	newBinding->getBuffer(buf)->unlock();
429	}
430
431	// Delete old binding & declaration
432	HardwareBufferManager::getSingleton().
433	destroyVertexBufferBinding(vertexBufferBinding);
434	HardwareBufferManager::getSingleton().destroyVertexDeclaration(vertexDeclaration);
435
436	// Assign new binding and declaration
437	vertexDeclaration = newDeclaration;
438	vertexBufferBinding = newBinding;
439
440	}
441	//-----------------------------------------------------------------------
442	void VertexData::reorganiseBuffers(VertexDeclaration* newDeclaration)
443	{
444	// Derive the buffer usages from looking at where the source has come
445	// from
446	BufferUsageList usages;
447	for (unsigned short b = 0; b <= newDeclaration->getMaxSource(); ++b)
448	{
449	VertexDeclaration::VertexElementList destElems = newDeclaration->findElementsBySource(b);
450	// Initialise with most restrictive version
451	// (not really a usable option, but these flags will be removed)
452	HardwareBuffer::Usage final = static_cast<HardwareBuffer::Usage>(
453	HardwareBuffer::HBU_STATIC_WRITE_ONLY \| HardwareBuffer::HBU_DISCARDABLE);
454	VertexDeclaration::VertexElementList::iterator v;
455	for (v = destElems.begin(); v != destElems.end(); ++v)
456	{
457	VertexElement& destelem = *v;
458	// get source
459	const VertexElement* srcelem =
460	vertexDeclaration->findElementBySemantic(
461	destelem.getSemantic(), destelem.getIndex());
462	// get buffer
463	HardwareVertexBufferSharedPtr srcbuf =
464	vertexBufferBinding->getBuffer(srcelem->getSource());
465	// improve flexibility only
466	if (srcbuf->getUsage() & HardwareBuffer::HBU_DYNAMIC)
467	{
468	// remove static
469	final = static_cast<HardwareBuffer::Usage>(
470	final & ~HardwareBuffer::HBU_STATIC);
471	// add dynamic
472	final = static_cast<HardwareBuffer::Usage>(
473	final \| HardwareBuffer::HBU_DYNAMIC);
474	}
475	if (!(srcbuf->getUsage() & HardwareBuffer::HBU_WRITE_ONLY))
476	{
477	// remove write only
478	final = static_cast<HardwareBuffer::Usage>(
479	final & ~HardwareBuffer::HBU_WRITE_ONLY);
480	}
481	if (!(srcbuf->getUsage() & HardwareBuffer::HBU_DISCARDABLE))
482	{
483	// remove discardable
484	final = static_cast<HardwareBuffer::Usage>(
485	final & ~HardwareBuffer::HBU_DISCARDABLE);
486	}
487
488	}
489	usages.push_back(final);
490	}
491	// Call specific method
492	reorganiseBuffers(newDeclaration, usages);
493
494	}
495	//-----------------------------------------------------------------------
496	void VertexData::closeGapsInBindings(void)
497	{
498	if (!vertexBufferBinding->hasGaps())
499	return;
500
501	// Check for error first
502	const VertexDeclaration::VertexElementList& allelems =
503	vertexDeclaration->getElements();
504	VertexDeclaration::VertexElementList::const_iterator ai;
505	for (ai = allelems.begin(); ai != allelems.end(); ++ai)
506	{
507	const VertexElement& elem = *ai;
508	if (!vertexBufferBinding->isBufferBound(elem.getSource()))
509	{
510	OGRE_EXCEPT(Exception::ERR_ITEM_NOT_FOUND,
511	"No buffer is bound to that element source.",
512	"VertexData::closeGapsInBindings");
513	}
514	}
515
516	// Close gaps in the vertex buffer bindings
517	VertexBufferBinding::BindingIndexMap bindingIndexMap;
518	vertexBufferBinding->closeGaps(bindingIndexMap);
519
520	// Modify vertex elements to reference to new buffer index
521	unsigned short elemIndex = 0;
522	for (ai = allelems.begin(); ai != allelems.end(); ++ai, ++elemIndex)
523	{
524	const VertexElement& elem = *ai;
525	VertexBufferBinding::BindingIndexMap::const_iterator it =
526	bindingIndexMap.find(elem.getSource());
527	assert(it != bindingIndexMap.end());
528	ushort targetSource = it->second;
529	if (elem.getSource() != targetSource)
530	{
531	vertexDeclaration->modifyElement(elemIndex,
532	targetSource, elem.getOffset(), elem.getType(),
533	elem.getSemantic(), elem.getIndex());
534	}
535	}
536	}
537	//-----------------------------------------------------------------------
538	void VertexData::removeUnusedBuffers(void)
539	{
540	std::set<ushort> usedBuffers;
541
542	// Collect used buffers
543	const VertexDeclaration::VertexElementList& allelems =
544	vertexDeclaration->getElements();
545	VertexDeclaration::VertexElementList::const_iterator ai;
546	for (ai = allelems.begin(); ai != allelems.end(); ++ai)
547	{
548	const VertexElement& elem = *ai;
549	usedBuffers.insert(elem.getSource());
550	}
551
552	// Unset unused buffer bindings
553	ushort count = vertexBufferBinding->getLastBoundIndex();
554	for (ushort index = 0; index < count; ++index)
555	{
556	if (usedBuffers.find(index) == usedBuffers.end() &&
557	vertexBufferBinding->isBufferBound(index))
558	{
559	vertexBufferBinding->unsetBinding(index);
560	}
561	}
562
563	// Close gaps
564	closeGapsInBindings();
565	}
566	//-----------------------------------------------------------------------
567	void VertexData::convertPackedColour(
568	VertexElementType srcType, VertexElementType destType)
569	{
570	if (destType != VET_COLOUR_ABGR && destType != VET_COLOUR_ARGB)
571	{
572	OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
573	"Invalid destType parameter", "VertexData::convertPackedColour");
574	}
575	if (srcType != VET_COLOUR_ABGR && srcType != VET_COLOUR_ARGB)
576	{
577	OGRE_EXCEPT(Exception::ERR_INVALIDPARAMS,
578	"Invalid srcType parameter", "VertexData::convertPackedColour");
579	}
580
581	const VertexBufferBinding::VertexBufferBindingMap& bindMap =
582	vertexBufferBinding->getBindings();
583	VertexBufferBinding::VertexBufferBindingMap::const_iterator bindi;
584	for (bindi = bindMap.begin(); bindi != bindMap.end(); ++bindi)
585	{
586	VertexDeclaration::VertexElementList elems =
587	vertexDeclaration->findElementsBySource(bindi->first);
588	bool conversionNeeded = false;
589	VertexDeclaration::VertexElementList::iterator elemi;
590	for (elemi = elems.begin(); elemi != elems.end(); ++elemi)
591	{
592	VertexElement& elem = *elemi;
593	if (elem.getType() == VET_COLOUR \|\|
594	((elem.getType() == VET_COLOUR_ABGR \|\| elem.getType() == VET_COLOUR_ARGB)
595	&& elem.getType() != destType))
596	{
597	conversionNeeded = true;
598	}
599	}
600
601	if (conversionNeeded)
602	{
603	void* pBase = bindi->second->lock(HardwareBuffer::HBL_NORMAL);
604
605	for (size_t v = 0; v < bindi->second->getNumVertices(); ++v)
606	{
607
608	for (elemi = elems.begin(); elemi != elems.end(); ++elemi)
609	{
610	VertexElement& elem = *elemi;
611	VertexElementType currType = (elem.getType() == VET_COLOUR) ?
612	srcType : elem.getType();
613	if (elem.getType() == VET_COLOUR \|\|
614	((elem.getType() == VET_COLOUR_ABGR \|\| elem.getType() == VET_COLOUR_ARGB)
615	&& elem.getType() != destType))
616	{
617	uint32* pRGBA;
618	elem.baseVertexPointerToElement(pBase, &pRGBA);
619	VertexElement::convertColourValue(currType, destType, pRGBA);
620	}
621	}
622	pBase = static_cast<void*>(
623	static_cast<char*>(pBase) + bindi->second->getVertexSize());
624	}
625	bindi->second->unlock();
626
627	// Modify the elements to reflect the changed type
628	const VertexDeclaration::VertexElementList& allelems =
629	vertexDeclaration->getElements();
630	VertexDeclaration::VertexElementList::const_iterator ai;
631	unsigned short elemIndex = 0;
632	for (ai = allelems.begin(); ai != allelems.end(); ++ai, ++elemIndex)
633	{
634	const VertexElement& elem = *ai;
635	if (elem.getType() == VET_COLOUR \|\|
636	((elem.getType() == VET_COLOUR_ABGR \|\| elem.getType() == VET_COLOUR_ARGB)
637	&& elem.getType() != destType))
638	{
639	vertexDeclaration->modifyElement(elemIndex,
640	elem.getSource(), elem.getOffset(), destType,
641	elem.getSemantic(), elem.getIndex());
642	}
643	}
644
645	}
646
647
648	} // each buffer
649
650
651	}
652	//-----------------------------------------------------------------------
653	void VertexData::allocateHardwareAnimationElements(ushort count)
654	{
655	// Find first free texture coord set
656	unsigned short texCoord = 0;
657	const VertexDeclaration::VertexElementList& vel = vertexDeclaration->getElements();
658	for (VertexDeclaration::VertexElementList::const_iterator i = vel.begin();
659	i != vel.end(); ++i)
660	{
661	const VertexElement& el = *i;
662	if (el.getSemantic() == VES_TEXTURE_COORDINATES)
663	{
664	++texCoord;
665	}
666	}
667	assert(texCoord <= OGRE_MAX_TEXTURE_COORD_SETS);
668
669	// Increase to correct size
670	for (size_t c = hwAnimationDataList.size(); c < count; ++c)
671	{
672	// Create a new 3D texture coordinate set
673	HardwareAnimationData data;
674	data.targetVertexElement = &(vertexDeclaration->addElement(
675	vertexBufferBinding->getNextIndex(), 0, VET_FLOAT3, VES_TEXTURE_COORDINATES, texCoord++));
676
677	hwAnimationDataList.push_back(data);
678	// Vertex buffer will not be bound yet, we expect this to be done by the
679	// caller when it becomes appropriate (e.g. through a VertexAnimationTrack)
680	}
681	}
682	//-----------------------------------------------------------------------
683	//-----------------------------------------------------------------------
684	IndexData::IndexData()
685	{
686	indexCount = 0;
687	indexStart = 0;
688
689	}
690	//-----------------------------------------------------------------------
691	IndexData::~IndexData()
692	{
693	}
694	//-----------------------------------------------------------------------
695	IndexData* IndexData::clone(bool copyData) const
696	{
697	IndexData* dest = new IndexData();
698	if (indexBuffer.get())
699	{
700	if (copyData)
701	{
702	dest->indexBuffer = HardwareBufferManager::getSingleton().
703	createIndexBuffer(indexBuffer->getType(), indexBuffer->getNumIndexes(),
704	indexBuffer->getUsage(), indexBuffer->hasShadowBuffer());
705	dest->indexBuffer->copyData(*indexBuffer, 0, 0, indexBuffer->getSizeInBytes(), true);
706	}
707	else
708	{
709	dest->indexBuffer = indexBuffer;
710	}
711	}
712	dest->indexCount = indexCount;
713	dest->indexStart = indexStart;
714	return dest;
715	}
716	//-----------------------------------------------------------------------
717	//-----------------------------------------------------------------------
718	// Local Utility class for vertex cache optimizer
719	class Triangle
720	{
721	public:
722	enum EdgeMatchType {
723	AB, BC, CA, ANY, NONE
724	};
725
726	uint32 a, b, c;
727
728	inline Triangle()
729	{
730	}
731
732	inline Triangle( uint32 ta, uint32 tb, uint32 tc )
733	: a( ta ), b( tb ), c( tc )
734	{
735	}
736
737	inline Triangle( uint32 t[3] )
738	: a( t[0] ), b( t[1] ), c( t[2] )
739	{
740	}
741
742	inline Triangle( const Triangle& t )
743	: a( t.a ), b( t.b ), c( t.c )
744	{
745	}
746
747	inline bool sharesEdge(const Triangle& t) const
748	{
749	return( a == t.a && b == t.c \|\|
750	a == t.b && b == t.a \|\|
751	a == t.c && b == t.b \|\|
752	b == t.a && c == t.c \|\|
753	b == t.b && c == t.a \|\|
754	b == t.c && c == t.b \|\|
755	c == t.a && a == t.c \|\|
756	c == t.b && a == t.a \|\|
757	c == t.c && a == t.b );
758	}
759
760	inline bool sharesEdge(const uint32 ea, const uint32 eb, const Triangle& t) const
761	{
762	return( ea == t.a && eb == t.c \|\|
763	ea == t.b && eb == t.a \|\|
764	ea == t.c && eb == t.b );
765	}
766
767	inline bool sharesEdge(const EdgeMatchType edge, const Triangle& t) const
768	{
769	if (edge == AB)
770	return sharesEdge(a, b, t);
771	else if (edge == BC)
772	return sharesEdge(b, c, t);
773	else if (edge == CA)
774	return sharesEdge(c, a, t);
775	else
776	return (edge == ANY) == sharesEdge(t);
777	}
778
779	inline EdgeMatchType endoSharedEdge(const Triangle& t) const
780	{
781	if (sharesEdge(a, b, t)) return AB;
782	if (sharesEdge(b, c, t)) return BC;
783	if (sharesEdge(c, a, t)) return CA;
784	return NONE;
785	}
786
787	inline EdgeMatchType exoSharedEdge(const Triangle& t) const
788	{
789	return t.endoSharedEdge(*this);
790	}
791
792	inline void shiftClockwise()
793	{
794	uint32 t = a;
795	a = c;
796	c = b;
797	b = t;
798	}
799
800	inline void shiftCounterClockwise()
801	{
802	uint32 t = a;
803	a = b;
804	b = c;
805	c = t;
806	}
807	};
808	//-----------------------------------------------------------------------
809	//-----------------------------------------------------------------------
810	void IndexData::optimiseVertexCacheTriList(void)
811	{
812	if (indexBuffer->isLocked()) return;
813
814	void *buffer = indexBuffer->lock(HardwareBuffer::HBL_NORMAL);
815
816	Triangle* triangles;
817	uint32 *dest;
818
819	size_t nIndexes = indexCount;
820	size_t nTriangles = nIndexes / 3;
821	size_t i, j;
822	uint16 *source;
823
824	if (indexBuffer->getType() == HardwareIndexBuffer::IT_16BIT)
825	{
826	triangles = new Triangle[nTriangles];
827	source = (uint16 *)buffer;
828	dest = (uint32 *)triangles;
829	for (i = 0; i < nIndexes; ++i) dest[i] = source[i];
830	}
831	else
832	triangles = (Triangle*)buffer;
833
834	// sort triangles based on shared edges
835	uint32 *destlist = new uint32[nTriangles];
836	unsigned char *visited = new unsigned char[nTriangles];
837
838	for (i = 0; i < nTriangles; ++i) visited[i] = 0;
839
840	uint32 start = 0, ti = 0, destcount = 0;
841
842	bool found = false;
843	for (i = 0; i < nTriangles; ++i)
844	{
845	if (found)
846	found = false;
847	else
848	{
849	while (visited[start++]);
850	ti = start - 1;
851	}
852
853	destlist[destcount++] = ti;
854	visited[ti] = 1;
855
856	for (j = start; j < nTriangles; ++j)
857	{
858	if (visited[j]) continue;
859
860	if (triangles[ti].sharesEdge(triangles[j]))
861	{
862	found = true;
863	ti = static_cast<uint32>(j);
864	break;
865	}
866	}
867	}
868
869	if (indexBuffer->getType() == HardwareIndexBuffer::IT_16BIT)
870	{
871	// reorder the indexbuffer
872	j = 0;
873	for (i = 0; i < nTriangles; ++i)
874	{
875	Triangle *t = &triangles[destlist[i]];
876	source[j++] = t->a;
877	source[j++] = t->b;
878	source[j++] = t->c;
879	}
880	delete[] triangles;
881	}
882	else
883	{
884	uint32 *reflist = new uint32[nTriangles];
885
886	// fill the referencebuffer
887	for (i = 0; i < nTriangles; ++i)
888	reflist[destlist[i]] = static_cast<uint32>(i);
889
890	// reorder the indexbuffer
891	for (i = 0; i < nTriangles; ++i)
892	{
893	j = destlist[i];
894	if (i == j) continue; // do not move triangle
895
896	// swap triangles
897
898	Triangle t = triangles[i];
899	triangles[i] = triangles[j];
900	triangles[j] = t;
901
902	// change reference
903	destlist[reflist[i]] = static_cast<uint32>(j);
904	// destlist[i] = i; // not needed, it will not be used
905	}
906
907	delete[] reflist;
908	}
909
910	delete[] destlist;
911	delete[] visited;
912
913	indexBuffer->unlock();
914	}
915	//-----------------------------------------------------------------------
916	//-----------------------------------------------------------------------
917	void VertexCacheProfiler::profile(const HardwareIndexBufferSharedPtr& indexBuffer)
918	{
919	if (indexBuffer->isLocked()) return;
920
921	uint16 shortbuffer = (uint16 )indexBuffer->lock(HardwareBuffer::HBL_READ_ONLY);
922
923	if (indexBuffer->getType() == HardwareIndexBuffer::IT_16BIT)
924	for (unsigned int i = 0; i < indexBuffer->getNumIndexes(); ++i)
925	inCache(shortbuffer[i]);
926	else
927	{
928	uint32 buffer = (uint32 )shortbuffer;
929	for (unsigned int i = 0; i < indexBuffer->getNumIndexes(); ++i)
930	inCache(buffer[i]);
931	}
932
933	indexBuffer->unlock();
934	}
935
936	//-----------------------------------------------------------------------
937	bool VertexCacheProfiler::inCache(unsigned int index)
938	{
939	for (unsigned int i = 0; i < buffersize; ++i)
940	{
941	if (index == cache[i])
942	{
943	hit++;
944	return true;
945	}
946	}
947
948	miss++;
949	cache[tail++] = index;
950	tail %= size;
951
952	if (buffersize < size) buffersize++;
953
954	return false;
955	}
956
957
958	}

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source: downloads/OgreMain/src/OgreVertexIndexData.cpp @ 5

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