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OgreTechnique.cpp @ 11

Last change on this file since 11 was 5, checked in by anonymous, 17 years ago
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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
31	#include "OgreTechnique.h"
32	#include "OgreMaterial.h"
33	#include "OgrePass.h"
34	#include "OgreRoot.h"
35	#include "OgreRenderSystem.h"
36	#include "OgreRenderSystemCapabilities.h"
37	#include "OgreGpuProgramManager.h"
38	#include "OgreMaterialManager.h"
39
40
41	namespace Ogre {
42	//-----------------------------------------------------------------------------
43	Technique::Technique(Material* parent)
44	: mParent(parent), mIsSupported(false), mIlluminationPassesCompilationPhase(IPS_NOT_COMPILED), mLodIndex(0), mSchemeIndex(0)
45	{
46	// See above, defaults to unsupported until examined
47	}
48	//-----------------------------------------------------------------------------
49	Technique::Technique(Material* parent, const Technique& oth)
50	: mParent(parent), mLodIndex(0), mSchemeIndex(0)
51	{
52	// Copy using operator=
53	*this = oth;
54	}
55	//-----------------------------------------------------------------------------
56	Technique::~Technique()
57	{
58	removeAllPasses();
59	clearIlluminationPasses();
60	}
61	//-----------------------------------------------------------------------------
62	bool Technique::isSupported(void) const
63	{
64	return mIsSupported;
65	}
66	//-----------------------------------------------------------------------------
67	String Technique::_compile(bool autoManageTextureUnits)
68	{
69	StringUtil::StrStreamType compileErrors;
70
71	// assume not supported
72	mIsSupported = false;
73	// Go through each pass, checking requirements
74	Passes::iterator i;
75	unsigned short passNum = 0;
76	const RenderSystemCapabilities* caps =
77	Root::getSingleton().getRenderSystem()->getCapabilities();
78	unsigned short numTexUnits = caps->getNumTextureUnits();
79	for (i = mPasses.begin(); i != mPasses.end(); ++i, ++passNum)
80	{
81	Pass* currPass = *i;
82	// Adjust pass index
83	currPass->_notifyIndex(passNum);
84	// Check texture unit requirements
85	size_t numTexUnitsRequested = currPass->getNumTextureUnitStates();
86	// Don't trust getNumTextureUnits for programmable
87	if(!currPass->hasFragmentProgram())
88	{
89	#if defined(OGRE_PRETEND_TEXTURE_UNITS) && OGRE_PRETEND_TEXTURE_UNITS > 0
90	if (numTexUnits > OGRE_PRETEND_TEXTURE_UNITS)
91	numTexUnits = OGRE_PRETEND_TEXTURE_UNITS;
92	#endif
93	if (numTexUnitsRequested > numTexUnits)
94	{
95	if (!autoManageTextureUnits)
96	{
97	// The user disabled auto pass split
98	compileErrors << "Pass " << passNum <<
99	": Too many texture units for the current hardware and no splitting allowed."
100	<< std::endl;
101	return compileErrors.str();
102	}
103	else if (currPass->hasVertexProgram())
104	{
105	// Can't do this one, and can't split a programmable pass
106	compileErrors << "Pass " << passNum <<
107	": Too many texture units for the current hardware and "
108	"cannot split programmable passes."
109	<< std::endl;
110	return compileErrors.str();
111	}
112	}
113	}
114
115	if (currPass->hasVertexProgram())
116	{
117	// Check vertex program version
118	if (!currPass->getVertexProgram()->isSupported() )
119	{
120	// Can't do this one
121	compileErrors << "Pass " << passNum <<
122	": Vertex program " << currPass->getVertexProgram()->getName()
123	<< " cannot be used - ";
124	if (currPass->getVertexProgram()->hasCompileError())
125	compileErrors << "compile error.";
126	else
127	compileErrors << "not supported.";
128
129	compileErrors << std::endl;
130	return compileErrors.str();
131	}
132	}
133	if (currPass->hasFragmentProgram())
134	{
135	// Check fragment program version
136	if (!currPass->getFragmentProgram()->isSupported())
137	{
138	// Can't do this one
139	compileErrors << "Pass " << passNum <<
140	": Fragment program " << currPass->getFragmentProgram()->getName()
141	<< " cannot be used - ";
142	if (currPass->getFragmentProgram()->hasCompileError())
143	compileErrors << "compile error.";
144	else
145	compileErrors << "not supported.";
146
147	compileErrors << std::endl;
148	return compileErrors.str();
149	}
150	}
151	else
152	{
153	// Check a few fixed-function options in texture layers
154	Pass::TextureUnitStateIterator texi = currPass->getTextureUnitStateIterator();
155	size_t texUnit = 0;
156	while (texi.hasMoreElements())
157	{
158	TextureUnitState* tex = texi.getNext();
159	// Any Cube textures? NB we make the assumption that any
160	// card capable of running fragment programs can support
161	// cubic textures, which has to be true, surely?
162	if (tex->is3D() && !caps->hasCapability(RSC_CUBEMAPPING))
163	{
164	// Fail
165	compileErrors << "Pass " << passNum <<
166	" Tex " << texUnit <<
167	": Cube maps not supported by current environment."
168	<< std::endl;
169	return compileErrors.str();
170	}
171	// Any 3D textures? NB we make the assumption that any
172	// card capable of running fragment programs can support
173	// 3D textures, which has to be true, surely?
174	if (tex->getTextureType() == TEX_TYPE_3D && !caps->hasCapability(RSC_TEXTURE_3D))
175	{
176	// Fail
177	compileErrors << "Pass " << passNum <<
178	" Tex " << texUnit <<
179	": Volume textures not supported by current environment."
180	<< std::endl;
181	return compileErrors.str();
182	}
183	// Any Dot3 blending?
184	if (tex->getColourBlendMode().operation == LBX_DOTPRODUCT &&
185	!caps->hasCapability(RSC_DOT3))
186	{
187	// Fail
188	compileErrors << "Pass " << passNum <<
189	" Tex " << texUnit <<
190	": DOT3 blending not supported by current environment."
191	<< std::endl;
192	return compileErrors.str();
193	}
194	++texUnit;
195	}
196
197	// We're ok on operations, now we need to check # texture units
198	if (!currPass->hasFragmentProgram())
199	{
200	// Keep splitting this pass so long as units requested > gpu units
201	while (numTexUnitsRequested > numTexUnits)
202	{
203	// chop this pass into many passes
204	currPass = currPass->_split(numTexUnits);
205	numTexUnitsRequested = currPass->getNumTextureUnitStates();
206	// Advance pass number
207	++passNum;
208	// Reset iterator
209	i = mPasses.begin() + passNum;
210	// Move the new pass to the right place (will have been created
211	// at the end, may be other passes in between)
212	assert(mPasses.back() == currPass);
213	std::copy_backward(i, (mPasses.end()-1), mPasses.end());
214	*i = currPass;
215	// Adjust pass index
216	currPass->_notifyIndex(passNum);
217	}
218	}
219	}
220
221	}
222	// If we got this far, we're ok
223	mIsSupported = true;
224
225	// Compile for categorised illumination on demand
226	clearIlluminationPasses();
227	mIlluminationPassesCompilationPhase = IPS_NOT_COMPILED;
228
229	return StringUtil::BLANK;
230
231	}
232	//-----------------------------------------------------------------------------
233	Pass* Technique::createPass(void)
234	{
235	Pass* newPass = new Pass(this, static_cast<unsigned short>(mPasses.size()));
236	mPasses.push_back(newPass);
237	return newPass;
238	}
239	//-----------------------------------------------------------------------------
240	Pass* Technique::getPass(unsigned short index)
241	{
242	assert(index < mPasses.size() && "Index out of bounds");
243	return mPasses[index];
244	}
245	//-----------------------------------------------------------------------------
246	Pass* Technique::getPass(const String& name)
247	{
248	Passes::iterator i = mPasses.begin();
249	Passes::iterator iend = mPasses.end();
250	Pass* foundPass = 0;
251
252	// iterate through techniques to find a match
253	while (i != iend)
254	{
255	if ( (*i)->getName() == name )
256	{
257	foundPass = (*i);
258	break;
259	}
260	++i;
261	}
262
263	return foundPass;
264	}
265	//-----------------------------------------------------------------------------
266	unsigned short Technique::getNumPasses(void) const
267	{
268	return static_cast<unsigned short>(mPasses.size());
269	}
270	//-----------------------------------------------------------------------------
271	void Technique::removePass(unsigned short index)
272	{
273	assert(index < mPasses.size() && "Index out of bounds");
274	Passes::iterator i = mPasses.begin() + index;
275	(*i)->queueForDeletion();
276	i = mPasses.erase(i);
277	// Adjust passes index
278	for (; i != mPasses.end(); ++i, ++index)
279	{
280	(*i)->_notifyIndex(index);
281	}
282	}
283	//-----------------------------------------------------------------------------
284	void Technique::removeAllPasses(void)
285	{
286	Passes::iterator i, iend;
287	iend = mPasses.end();
288	for (i = mPasses.begin(); i != iend; ++i)
289	{
290	(*i)->queueForDeletion();
291	}
292	mPasses.clear();
293	}
294
295	//-----------------------------------------------------------------------------
296	bool Technique::movePass(const unsigned short sourceIndex, const unsigned short destinationIndex)
297	{
298	bool moveSuccessful = false;
299
300	// don't move the pass if source == destination
301	if (sourceIndex == destinationIndex) return true;
302
303	if( (sourceIndex < mPasses.size()) && (destinationIndex < mPasses.size()))
304	{
305	Passes::iterator i = mPasses.begin() + sourceIndex;
306	//Passes::iterator DestinationIterator = mPasses.begin() + destinationIndex;
307
308	Pass* pass = (*i);
309	mPasses.erase(i);
310
311	i = mPasses.begin() + destinationIndex;
312
313	// compensate for source erase if destination is greater than source
314	if (destinationIndex > sourceIndex) --i;
315
316	mPasses.insert(i, pass);
317
318	// Adjust passes index
319	unsigned short beginIndex, endIndex;
320	if (destinationIndex > sourceIndex)
321	{
322	beginIndex = sourceIndex;
323	endIndex = destinationIndex;
324	}
325	else
326	{
327	beginIndex = destinationIndex;
328	endIndex = sourceIndex;
329	}
330	for (unsigned short index = beginIndex; index <= endIndex; ++index)
331	{
332	mPasses[index]->_notifyIndex(index);
333	}
334	moveSuccessful = true;
335	}
336
337	return moveSuccessful;
338	}
339
340	//-----------------------------------------------------------------------------
341	const Technique::PassIterator Technique::getPassIterator(void)
342	{
343	return PassIterator(mPasses.begin(), mPasses.end());
344	}
345	//-----------------------------------------------------------------------------
346	Technique& Technique::operator=(const Technique& rhs)
347	{
348	mName = rhs.mName;
349	this->mIsSupported = rhs.mIsSupported;
350	this->mLodIndex = rhs.mLodIndex;
351	this->mSchemeIndex = rhs.mSchemeIndex;
352	// copy passes
353	removeAllPasses();
354	Passes::const_iterator i, iend;
355	iend = rhs.mPasses.end();
356	for (i = rhs.mPasses.begin(); i != iend; ++i)
357	{
358	Pass* p = new Pass(this, (i)->getIndex(), (*i));
359	mPasses.push_back(p);
360	}
361	// Compile for categorised illumination on demand
362	clearIlluminationPasses();
363	mIlluminationPassesCompilationPhase = IPS_NOT_COMPILED;
364	return *this;
365	}
366	//-----------------------------------------------------------------------------
367	bool Technique::isTransparent(void) const
368	{
369	if (mPasses.empty())
370	{
371	return false;
372	}
373	else
374	{
375	// Base decision on the transparency of the first pass
376	return mPasses[0]->isTransparent();
377	}
378	}
379	//-----------------------------------------------------------------------------
380	bool Technique::isDepthWriteEnabled(void) const
381	{
382	if (mPasses.empty())
383	{
384	return false;
385	}
386	else
387	{
388	// Base decision on the depth settings of the first pass
389	return mPasses[0]->getDepthWriteEnabled();
390	}
391	}
392	//-----------------------------------------------------------------------------
393	bool Technique::isDepthCheckEnabled(void) const
394	{
395	if (mPasses.empty())
396	{
397	return false;
398	}
399	else
400	{
401	// Base decision on the depth settings of the first pass
402	return mPasses[0]->getDepthCheckEnabled();
403	}
404	}
405	//-----------------------------------------------------------------------------
406	bool Technique::hasColourWriteDisabled(void) const
407	{
408	if (mPasses.empty())
409	{
410	return true;
411	}
412	else
413	{
414	// Base decision on the colour write settings of the first pass
415	return !mPasses[0]->getColourWriteEnabled();
416	}
417	}
418	//-----------------------------------------------------------------------------
419	void Technique::_load(void)
420	{
421	assert (mIsSupported && "This technique is not supported");
422	// Load each pass
423	Passes::iterator i, iend;
424	iend = mPasses.end();
425	for (i = mPasses.begin(); i != iend; ++i)
426	{
427	(*i)->_load();
428	}
429
430	IlluminationPassList::iterator il, ilend;
431	ilend = mIlluminationPasses.end();
432	for (il = mIlluminationPasses.begin(); il != ilend; ++il)
433	{
434	if((il)->pass != (il)->originalPass)
435	(*il)->pass->_load();
436	}
437	}
438	//-----------------------------------------------------------------------------
439	void Technique::_unload(void)
440	{
441	// Unload each pass
442	Passes::iterator i, iend;
443	iend = mPasses.end();
444	for (i = mPasses.begin(); i != iend; ++i)
445	{
446	(*i)->_unload();
447	}
448	}
449	//-----------------------------------------------------------------------------
450	bool Technique::isLoaded(void) const
451	{
452	// Only supported technique will be loaded
453	return mParent->isLoaded() && mIsSupported;
454	}
455	//-----------------------------------------------------------------------
456	void Technique::setPointSize(Real ps)
457	{
458	Passes::iterator i, iend;
459	iend = mPasses.end();
460	for (i = mPasses.begin(); i != iend; ++i)
461	{
462	(*i)->setPointSize(ps);
463	}
464
465	}
466	//-----------------------------------------------------------------------
467	void Technique::setAmbient(Real red, Real green, Real blue)
468	{
469	Passes::iterator i, iend;
470	iend = mPasses.end();
471	for (i = mPasses.begin(); i != iend; ++i)
472	{
473	(*i)->setAmbient(red, green, blue);
474	}
475
476	}
477	//-----------------------------------------------------------------------
478	void Technique::setAmbient(const ColourValue& ambient)
479	{
480	setAmbient(ambient.r, ambient.g, ambient.b);
481	}
482	//-----------------------------------------------------------------------
483	void Technique::setDiffuse(Real red, Real green, Real blue, Real alpha)
484	{
485	Passes::iterator i, iend;
486	iend = mPasses.end();
487	for (i = mPasses.begin(); i != iend; ++i)
488	{
489	(*i)->setDiffuse(red, green, blue, alpha);
490	}
491	}
492	//-----------------------------------------------------------------------
493	void Technique::setDiffuse(const ColourValue& diffuse)
494	{
495	setDiffuse(diffuse.r, diffuse.g, diffuse.b, diffuse.a);
496	}
497	//-----------------------------------------------------------------------
498	void Technique::setSpecular(Real red, Real green, Real blue, Real alpha)
499	{
500	Passes::iterator i, iend;
501	iend = mPasses.end();
502	for (i = mPasses.begin(); i != iend; ++i)
503	{
504	(*i)->setSpecular(red, green, blue, alpha);
505	}
506	}
507	//-----------------------------------------------------------------------
508	void Technique::setSpecular(const ColourValue& specular)
509	{
510	setSpecular(specular.r, specular.g, specular.b, specular.a);
511	}
512	//-----------------------------------------------------------------------
513	void Technique::setShininess(Real val)
514	{
515	Passes::iterator i, iend;
516	iend = mPasses.end();
517	for (i = mPasses.begin(); i != iend; ++i)
518	{
519	(*i)->setShininess(val);
520	}
521	}
522	//-----------------------------------------------------------------------
523	void Technique::setSelfIllumination(Real red, Real green, Real blue)
524	{
525	Passes::iterator i, iend;
526	iend = mPasses.end();
527	for (i = mPasses.begin(); i != iend; ++i)
528	{
529	(*i)->setSelfIllumination(red, green, blue);
530	}
531	}
532	//-----------------------------------------------------------------------
533	void Technique::setSelfIllumination(const ColourValue& selfIllum)
534	{
535	setSelfIllumination(selfIllum.r, selfIllum.g, selfIllum.b);
536	}
537	//-----------------------------------------------------------------------
538	void Technique::setDepthCheckEnabled(bool enabled)
539	{
540	Passes::iterator i, iend;
541	iend = mPasses.end();
542	for (i = mPasses.begin(); i != iend; ++i)
543	{
544	(*i)->setDepthCheckEnabled(enabled);
545	}
546	}
547	//-----------------------------------------------------------------------
548	void Technique::setDepthWriteEnabled(bool enabled)
549	{
550	Passes::iterator i, iend;
551	iend = mPasses.end();
552	for (i = mPasses.begin(); i != iend; ++i)
553	{
554	(*i)->setDepthWriteEnabled(enabled);
555	}
556	}
557	//-----------------------------------------------------------------------
558	void Technique::setDepthFunction( CompareFunction func )
559	{
560	Passes::iterator i, iend;
561	iend = mPasses.end();
562	for (i = mPasses.begin(); i != iend; ++i)
563	{
564	(*i)->setDepthFunction(func);
565	}
566	}
567	//-----------------------------------------------------------------------
568	void Technique::setColourWriteEnabled(bool enabled)
569	{
570	Passes::iterator i, iend;
571	iend = mPasses.end();
572	for (i = mPasses.begin(); i != iend; ++i)
573	{
574	(*i)->setColourWriteEnabled(enabled);
575	}
576	}
577	//-----------------------------------------------------------------------
578	void Technique::setCullingMode( CullingMode mode )
579	{
580	Passes::iterator i, iend;
581	iend = mPasses.end();
582	for (i = mPasses.begin(); i != iend; ++i)
583	{
584	(*i)->setCullingMode(mode);
585	}
586	}
587	//-----------------------------------------------------------------------
588	void Technique::setManualCullingMode( ManualCullingMode mode )
589	{
590	Passes::iterator i, iend;
591	iend = mPasses.end();
592	for (i = mPasses.begin(); i != iend; ++i)
593	{
594	(*i)->setManualCullingMode(mode);
595	}
596	}
597	//-----------------------------------------------------------------------
598	void Technique::setLightingEnabled(bool enabled)
599	{
600	Passes::iterator i, iend;
601	iend = mPasses.end();
602	for (i = mPasses.begin(); i != iend; ++i)
603	{
604	(*i)->setLightingEnabled(enabled);
605	}
606	}
607	//-----------------------------------------------------------------------
608	void Technique::setShadingMode( ShadeOptions mode )
609	{
610	Passes::iterator i, iend;
611	iend = mPasses.end();
612	for (i = mPasses.begin(); i != iend; ++i)
613	{
614	(*i)->setShadingMode(mode);
615	}
616	}
617	//-----------------------------------------------------------------------
618	void Technique::setFog(bool overrideScene, FogMode mode, const ColourValue& colour,
619	Real expDensity, Real linearStart, Real linearEnd)
620	{
621	Passes::iterator i, iend;
622	iend = mPasses.end();
623	for (i = mPasses.begin(); i != iend; ++i)
624	{
625	(*i)->setFog(overrideScene, mode, colour, expDensity, linearStart, linearEnd);
626	}
627	}
628	//-----------------------------------------------------------------------
629	void Technique::setDepthBias(float constantBias, float slopeScaleBias)
630	{
631	Passes::iterator i, iend;
632	iend = mPasses.end();
633	for (i = mPasses.begin(); i != iend; ++i)
634	{
635	(*i)->setDepthBias(constantBias, slopeScaleBias);
636	}
637	}
638	//-----------------------------------------------------------------------
639	void Technique::setTextureFiltering(TextureFilterOptions filterType)
640	{
641	Passes::iterator i, iend;
642	iend = mPasses.end();
643	for (i = mPasses.begin(); i != iend; ++i)
644	{
645	(*i)->setTextureFiltering(filterType);
646	}
647	}
648	// --------------------------------------------------------------------
649	void Technique::setTextureAnisotropy(unsigned int maxAniso)
650	{
651	Passes::iterator i, iend;
652	iend = mPasses.end();
653	for (i = mPasses.begin(); i != iend; ++i)
654	{
655	(*i)->setTextureAnisotropy(maxAniso);
656	}
657	}
658	// --------------------------------------------------------------------
659	void Technique::setSceneBlending( const SceneBlendType sbt )
660	{
661	Passes::iterator i, iend;
662	iend = mPasses.end();
663	for (i = mPasses.begin(); i != iend; ++i)
664	{
665	(*i)->setSceneBlending(sbt);
666	}
667	}
668	// --------------------------------------------------------------------
669	void Technique::setSceneBlending( const SceneBlendFactor sourceFactor,
670	const SceneBlendFactor destFactor)
671	{
672	Passes::iterator i, iend;
673	iend = mPasses.end();
674	for (i = mPasses.begin(); i != iend; ++i)
675	{
676	(*i)->setSceneBlending(sourceFactor, destFactor);
677	}
678	}
679
680	// --------------------------------------------------------------------
681	void Technique::setName(const String& name)
682	{
683	mName = name;
684	}
685
686
687	//-----------------------------------------------------------------------
688	void Technique::_notifyNeedsRecompile(void)
689	{
690	// Disable require to recompile when splitting illumination passes
691	if (mIlluminationPassesCompilationPhase != IPS_COMPILE_DISABLED)
692	{
693	mParent->_notifyNeedsRecompile();
694	}
695	}
696	//-----------------------------------------------------------------------
697	void Technique::setLodIndex(unsigned short index)
698	{
699	mLodIndex = index;
700	_notifyNeedsRecompile();
701	}
702	//-----------------------------------------------------------------------
703	void Technique::setSchemeName(const String& schemeName)
704	{
705	mSchemeIndex = MaterialManager::getSingleton()._getSchemeIndex(schemeName);
706	_notifyNeedsRecompile();
707	}
708	//-----------------------------------------------------------------------
709	const String& Technique::getSchemeName(void) const
710	{
711	return MaterialManager::getSingleton()._getSchemeName(mSchemeIndex);
712	}
713	//-----------------------------------------------------------------------
714	unsigned short Technique::_getSchemeIndex(void) const
715	{
716	return mSchemeIndex;
717	}
718	//-----------------------------------------------------------------------
719	void Technique::_compileIlluminationPasses(void)
720	{
721	clearIlluminationPasses();
722
723	Passes::iterator i, iend;
724	iend = mPasses.end();
725	i = mPasses.begin();
726
727	IlluminationStage iStage = IS_AMBIENT;
728
729	bool haveAmbient = false;
730	while (i != iend)
731	{
732	IlluminationPass* iPass;
733	Pass* p = *i;
734	switch(iStage)
735	{
736	case IS_AMBIENT:
737	// Keep looking for ambient only
738	if (p->isAmbientOnly())
739	{
740	// Add this pass wholesale
741	iPass = new IlluminationPass();
742	iPass->destroyOnShutdown = false;
743	iPass->originalPass = iPass->pass = p;
744	iPass->stage = iStage;
745	mIlluminationPasses.push_back(iPass);
746	haveAmbient = true;
747	// progress to next pass
748	++i;
749	}
750	else
751	{
752	// Split off any ambient part
753	if (p->getAmbient() != ColourValue::Black \|\|
754	p->getSelfIllumination() != ColourValue::Black \|\|
755	p->getAlphaRejectFunction() != CMPF_ALWAYS_PASS)
756	{
757	// Copy existing pass
758	Pass* newPass = new Pass(this, p->getIndex(), *p);
759	if (newPass->getAlphaRejectFunction() != CMPF_ALWAYS_PASS)
760	{
761	// Alpha rejection passes must retain their transparency, so
762	// we allow the texture units, but override the colour functions
763	Pass::TextureUnitStateIterator tusi = newPass->getTextureUnitStateIterator();
764	while (tusi.hasMoreElements())
765	{
766	TextureUnitState* tus = tusi.getNext();
767	tus->setColourOperationEx(LBX_SOURCE1, LBS_CURRENT);
768	}
769	}
770	else
771	{
772	// Remove any texture units
773	newPass->removeAllTextureUnitStates();
774	}
775	// Remove any fragment program
776	if (newPass->hasFragmentProgram())
777	newPass->setFragmentProgram("");
778	// We have to leave vertex program alone (if any) and
779	// just trust that the author is using light bindings, which
780	// we will ensure there are none in the ambient pass
781	newPass->setDiffuse(0, 0, 0, newPass->getDiffuse().a); // Preserving alpha
782	newPass->setSpecular(ColourValue::Black);
783
784	// Calculate hash value for new pass, because we are compiling
785	// illumination passes on demand, which will loss hash calculate
786	// before it add to render queue first time.
787	newPass->_recalculateHash();
788
789	iPass = new IlluminationPass();
790	iPass->destroyOnShutdown = true;
791	iPass->originalPass = p;
792	iPass->pass = newPass;
793	iPass->stage = iStage;
794
795	mIlluminationPasses.push_back(iPass);
796	haveAmbient = true;
797
798	}
799
800	if (!haveAmbient)
801	{
802	// Make up a new basic pass
803	Pass* newPass = new Pass(this, p->getIndex());
804	newPass->setAmbient(ColourValue::Black);
805	newPass->setDiffuse(ColourValue::Black);
806
807	// Calculate hash value for new pass, because we are compiling
808	// illumination passes on demand, which will loss hash calculate
809	// before it add to render queue first time.
810	newPass->_recalculateHash();
811
812	iPass = new IlluminationPass();
813	iPass->destroyOnShutdown = true;
814	iPass->originalPass = p;
815	iPass->pass = newPass;
816	iPass->stage = iStage;
817	mIlluminationPasses.push_back(iPass);
818	haveAmbient = true;
819	}
820	// This means we're done with ambients, progress to per-light
821	iStage = IS_PER_LIGHT;
822	}
823	break;
824	case IS_PER_LIGHT:
825	if (p->getIteratePerLight())
826	{
827	// If this is per-light already, use it directly
828	iPass = new IlluminationPass();
829	iPass->destroyOnShutdown = false;
830	iPass->originalPass = iPass->pass = p;
831	iPass->stage = iStage;
832	mIlluminationPasses.push_back(iPass);
833	// progress to next pass
834	++i;
835	}
836	else
837	{
838	// Split off per-light details (can only be done for one)
839	if (p->getLightingEnabled() &&
840	(p->getDiffuse() != ColourValue::Black \|\|
841	p->getSpecular() != ColourValue::Black))
842	{
843	// Copy existing pass
844	Pass* newPass = new Pass(this, p->getIndex(), *p);
845	if (newPass->getAlphaRejectFunction() != CMPF_ALWAYS_PASS)
846	{
847	// Alpha rejection passes must retain their transparency, so
848	// we allow the texture units, but override the colour functions
849	Pass::TextureUnitStateIterator tusi = newPass->getTextureUnitStateIterator();
850	while (tusi.hasMoreElements())
851	{
852	TextureUnitState* tus = tusi.getNext();
853	tus->setColourOperationEx(LBX_SOURCE1, LBS_CURRENT);
854	}
855	}
856	else
857	{
858	// remove texture units
859	newPass->removeAllTextureUnitStates();
860	}
861	// remove fragment programs
862	if (newPass->hasFragmentProgram())
863	newPass->setFragmentProgram("");
864	// Cannot remove vertex program, have to assume that
865	// it will process diffuse lights, ambient will be turned off
866	newPass->setAmbient(ColourValue::Black);
867	newPass->setSelfIllumination(ColourValue::Black);
868	// must be additive
869	newPass->setSceneBlending(SBF_ONE, SBF_ONE);
870
871	// Calculate hash value for new pass, because we are compiling
872	// illumination passes on demand, which will loss hash calculate
873	// before it add to render queue first time.
874	newPass->_recalculateHash();
875
876	iPass = new IlluminationPass();
877	iPass->destroyOnShutdown = true;
878	iPass->originalPass = p;
879	iPass->pass = newPass;
880	iPass->stage = iStage;
881
882	mIlluminationPasses.push_back(iPass);
883
884	}
885	// This means the end of per-light passes
886	iStage = IS_DECAL;
887	}
888	break;
889	case IS_DECAL:
890	// We just want a 'lighting off' pass to finish off
891	// and only if there are texture units
892	if (p->getNumTextureUnitStates() > 0)
893	{
894	if (!p->getLightingEnabled())
895	{
896	// we assume this pass already combines as required with the scene
897	iPass = new IlluminationPass();
898	iPass->destroyOnShutdown = false;
899	iPass->originalPass = iPass->pass = p;
900	iPass->stage = iStage;
901	mIlluminationPasses.push_back(iPass);
902	}
903	else
904	{
905	// Copy the pass and tweak away the lighting parts
906	Pass* newPass = new Pass(this, p->getIndex(), *p);
907	newPass->setAmbient(ColourValue::Black);
908	newPass->setDiffuse(0, 0, 0, newPass->getDiffuse().a); // Preserving alpha
909	newPass->setSpecular(ColourValue::Black);
910	newPass->setSelfIllumination(ColourValue::Black);
911	newPass->setLightingEnabled(false);
912	newPass->setIteratePerLight(false, false);
913	// modulate
914	newPass->setSceneBlending(SBF_DEST_COLOUR, SBF_ZERO);
915
916	// Calculate hash value for new pass, because we are compiling
917	// illumination passes on demand, which will loss hash calculate
918	// before it add to render queue first time.
919	newPass->_recalculateHash();
920
921	// NB there is nothing we can do about vertex & fragment
922	// programs here, so people will just have to make their
923	// programs friendly-like if they want to use this technique
924	iPass = new IlluminationPass();
925	iPass->destroyOnShutdown = true;
926	iPass->originalPass = p;
927	iPass->pass = newPass;
928	iPass->stage = iStage;
929	mIlluminationPasses.push_back(iPass);
930
931	}
932	}
933	++i; // always increment on decal, since nothing more to do with this pass
934
935	break;
936	}
937	}
938
939	}
940	//-----------------------------------------------------------------------
941	void Technique::clearIlluminationPasses(void)
942	{
943	IlluminationPassList::iterator i, iend;
944	iend = mIlluminationPasses.end();
945	for (i = mIlluminationPasses.begin(); i != iend; ++i)
946	{
947	if ((*i)->destroyOnShutdown)
948	{
949	(*i)->pass->queueForDeletion();
950	}
951	delete *i;
952	}
953	mIlluminationPasses.clear();
954	}
955	//-----------------------------------------------------------------------
956	const Technique::IlluminationPassIterator
957	Technique::getIlluminationPassIterator(void)
958	{
959	IlluminationPassesState targetState = IPS_COMPILED;
960	if (mIlluminationPassesCompilationPhase != targetState)
961	{
962	// prevents parent->_notifyNeedsRecompile() call during compile
963	mIlluminationPassesCompilationPhase = IPS_COMPILE_DISABLED;
964	// Splitting the passes into illumination passes
965	_compileIlluminationPasses();
966	// Mark that illumination passes compilation finished
967	mIlluminationPassesCompilationPhase = targetState;
968	}
969
970	return IlluminationPassIterator(mIlluminationPasses.begin(),
971	mIlluminationPasses.end());
972	}
973	//-----------------------------------------------------------------------
974	const String& Technique::getResourceGroup(void) const
975	{
976	return mParent->getGroup();
977	}
978
979	//-----------------------------------------------------------------------
980	bool Technique::applyTextureAliases(const AliasTextureNamePairList& aliasList, const bool apply) const
981	{
982	// iterate through passes and apply texture alias
983	Passes::const_iterator i, iend;
984	iend = mPasses.end();
985	bool testResult = false;
986
987	for(i = mPasses.begin(); i != iend; ++i)
988	{
989	if ((*i)->applyTextureAliases(aliasList, apply))
990	testResult = true;
991	}
992
993	return testResult;
994	}
995
996	}

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source: downloads/ogre/OgreMain/src/OgreTechnique.cpp @ 11

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