void LLDrawPoolAvatar::renderAvatars(LLVOAvatar* single_avatar, S32 pass)
{
	LLFastTimer t(FTM_RENDER_AVATARS);

	if (pass == -1)
	{
		for (S32 i = 1; i < getNumPasses(); i++)
		{ //skip foot shadows
			prerender();
			beginRenderPass(i);
			renderAvatars(single_avatar, i);
			endRenderPass(i);
		}

		return;
	}

	if (mDrawFace.empty() && !single_avatar)
	{
		return;
	}

	LLVOAvatar *avatarp;

	if (single_avatar)
	{
		avatarp = single_avatar;
	}
	else
	{
		const LLFace *facep = mDrawFace[0];
		if (!facep->getDrawable())
		{
			return;
		}
		avatarp = (LLVOAvatar *)facep->getDrawable()->getVObj().get();
	}

    if (avatarp->isDead() || avatarp->mDrawable.isNull())
	{
		return;
	}

	if (!single_avatar && !avatarp->isFullyLoaded() )
	{
		if (pass==0 && (!gPipeline.hasRenderType(LLPipeline::RENDER_TYPE_PARTICLES) || LLViewerPartSim::getMaxPartCount() <= 0))
		{
			// debug code to draw a sphere in place of avatar
			gGL.getTexUnit(0)->bind(LLViewerFetchedTexture::sWhiteImagep);
			gGL.setColorMask(true, true);
			LLVector3 pos = avatarp->getPositionAgent();
			gGL.color4f(1.0f, 1.0f, 1.0f, 0.7f);
			
			gGL.pushMatrix();	 
			gGL.translatef((F32)(pos.mV[VX]),	 
						   (F32)(pos.mV[VY]),	 
							(F32)(pos.mV[VZ]));	 
			 gGL.scalef(0.15f, 0.15f, 0.3f);

			 gSphere.renderGGL();

			 gGL.popMatrix();
			 gGL.setColorMask(true, false);
		}
		// don't render please
		return;
	}

	BOOL impostor = avatarp->isImpostor() && !single_avatar;

	if (impostor && pass != 0)
	{ //don't draw anything but the impostor for impostored avatars
		return;
	}
	
	if (pass == 0 && !impostor && LLPipeline::sUnderWaterRender)
	{ //don't draw foot shadows under water
		return;
	}

	if (pass == 0)
	{
		if (!LLPipeline::sReflectionRender)
		{
			LLVOAvatar::sNumVisibleAvatars++;
		}

		if (impostor)
		{
			if (LLPipeline::sRenderDeferred && !LLPipeline::sReflectionRender && avatarp->mImpostor.isComplete()) 
			{
				if (normal_channel > -1)
				{
					avatarp->mImpostor.bindTexture(2, normal_channel);
				}
				if (specular_channel > -1)
				{
					avatarp->mImpostor.bindTexture(1, specular_channel);
				}
			}
			avatarp->renderImpostor(LLColor4U(255,255,255,255), sDiffuseChannel);
		}
		//else if (gPipeline.hasRenderDebugFeatureMask(LLPipeline::RENDER_DEBUG_FEATURE_FOOT_SHADOWS) && !LLPipeline::sRenderDeferred)
		//{
		//	avatarp->renderFootShadows();	
		//}
		return;
	}

	llassert(LLPipeline::sImpostorRender || !avatarp->isVisuallyMuted());

	/*if (single_avatar && avatarp->mSpecialRenderMode >= 1) // 1=anim preview, 2=image preview,  3=morph view
	{
		gPipeline.enableLightsAvatarEdit(LLColor4(.5f, .5f, .5f, 1.f));
	}*/
	
	if (pass == 1)
	{
		// render rigid meshes (eyeballs) first
		avatarp->renderRigid();
		return;
	}

	if (pass == 3)
	{
		if (is_deferred_render)
		{
			renderDeferredRiggedSimple(avatarp);
		}
		else
		{
			renderRiggedSimple(avatarp);
			if (LLPipeline::sRenderDeferred)
			{ //render "simple" materials
				renderRigged(avatarp, RIGGED_MATERIAL);
				renderRigged(avatarp, RIGGED_MATERIAL_ALPHA_MASK);
				renderRigged(avatarp, RIGGED_MATERIAL_ALPHA_EMISSIVE);
				renderRigged(avatarp, RIGGED_NORMMAP);
				renderRigged(avatarp, RIGGED_NORMMAP_MASK);
				renderRigged(avatarp, RIGGED_NORMMAP_EMISSIVE);	
				renderRigged(avatarp, RIGGED_SPECMAP);
				renderRigged(avatarp, RIGGED_SPECMAP_MASK);
				renderRigged(avatarp, RIGGED_SPECMAP_EMISSIVE);
				renderRigged(avatarp, RIGGED_NORMSPEC);
				renderRigged(avatarp, RIGGED_NORMSPEC_MASK);
				renderRigged(avatarp, RIGGED_NORMSPEC_EMISSIVE);
			}
		}
		return;
	}

	if (pass == 4)
	{
		if (is_deferred_render)
		{
			renderDeferredRiggedBump(avatarp);
		}
		else
		{
			renderRiggedFullbright(avatarp);
		}

		return;
	}

	if (is_deferred_render && pass >= 5 && pass <= 21)
	{
		S32 p = pass-5;
		if (p != 1 &&
			p != 5 &&
			p != 9 &&
			p != 13)
		{
			renderDeferredRiggedMaterial(avatarp, p);
		}
		return;
	}
	if (pass == 5)
	{
		renderRiggedShinySimple(avatarp);
		return;
	}

	if (pass == 6)
	{
		renderRiggedFullbrightShiny(avatarp);
		return;
	}

	if (pass >= 7 && pass < 13)
	{
		if (pass == 7)
		{
			renderRiggedAlpha(avatarp);
			if (LLPipeline::sRenderDeferred && !is_post_deferred_render)
			{ //render transparent materials under water
				LLGLEnable blend(GL_BLEND);
				gGL.setColorMask(true, true);
				gGL.blendFunc(LLRender::BF_SOURCE_ALPHA,
								LLRender::BF_ONE_MINUS_SOURCE_ALPHA,
								LLRender::BF_ZERO,
								LLRender::BF_ONE_MINUS_SOURCE_ALPHA);
				renderRigged(avatarp, RIGGED_MATERIAL_ALPHA);
				renderRigged(avatarp, RIGGED_SPECMAP_BLEND);
				renderRigged(avatarp, RIGGED_NORMMAP_BLEND);
				renderRigged(avatarp, RIGGED_NORMSPEC_BLEND);
				gGL.setSceneBlendType(LLRender::BT_ALPHA);
				gGL.setColorMask(true, false);
			}
			return;
		}

		if (pass == 8)
		{
			renderRiggedFullbrightAlpha(avatarp);
			return;
		}
		if (LLPipeline::sRenderDeferred && is_post_deferred_render)
		{
			S32 p = 0;
			switch (pass)
			{
			case 9: p = 1; break;
			case 10: p = 5; break;
			case 11: p = 9; break;
			case 12: p = 13; break;
			}
			{
				LLGLEnable blend(GL_BLEND);
				renderDeferredRiggedMaterial(avatarp, p);
			}
			return;
		}
		else if (pass == 9)
		{
			renderRiggedGlow(avatarp);
			return;
		}
	}

	if (pass == 13)
	{
		renderRiggedGlow(avatarp);

		return;
	}
	
	if ((sShaderLevel >= SHADER_LEVEL_CLOTH))
	{
		LLMatrix4 rot_mat;
		LLViewerCamera::getInstance()->getMatrixToLocal(rot_mat);
		LLMatrix4 cfr(OGL_TO_CFR_ROTATION.getF32ptr());
		rot_mat *= cfr;
		
		LLVector4 wind;
		wind.setVec(avatarp->mWindVec);
		wind.mV[VW] = 0;
		wind = wind * rot_mat;
		wind.mV[VW] = avatarp->mWindVec.mV[VW];

		sVertexProgram->uniform4fv(LLViewerShaderMgr::AVATAR_WIND, 1, wind.mV);
		F32 phase = -1.f * (avatarp->mRipplePhase);

		F32 freq = 7.f + (noise1(avatarp->mRipplePhase) * 2.f);
		LLVector4 sin_params(freq, freq, freq, phase);
		sVertexProgram->uniform4fv(LLViewerShaderMgr::AVATAR_SINWAVE, 1, sin_params.mV);

		LLVector4 gravity(0.f, 0.f, -CLOTHING_GRAVITY_EFFECT, 0.f);
		gravity = gravity * rot_mat;
		sVertexProgram->uniform4fv(LLViewerShaderMgr::AVATAR_GRAVITY, 1, gravity.mV);
	}

	if( !single_avatar || (avatarp == single_avatar) )
	{
		avatarp->renderSkinned(AVATAR_RENDER_PASS_SINGLE);
	}
}
void LLViewerPartSim::updateSimulation()
{
	LLMemType mt(LLMemType::MTYPE_PARTICLES);
	
	static LLFrameTimer update_timer;

	const F32 dt = llmin(update_timer.getElapsedTimeAndResetF32(), 0.1f);

 	if (!(gPipeline.hasRenderType(LLPipeline::RENDER_TYPE_PARTICLES)))
	{
		return;
	}

	LLFastTimer ftm(FTM_SIMULATE_PARTICLES);

	// Start at a random particle system so the same
	// particle system doesn't always get first pick at the
	// particles.  Theoretically we'd want to do this in distance
	// order or something, but sorting particle sources will be a big
	// pain.
	S32 i;
	S32 count = (S32) mViewerPartSources.size();
	S32 start = (S32)ll_frand((F32)count);
	S32 dir = 1;
	S32 deldir = 0;
	if (ll_frand() > 0.5f)
	{
		dir = -1;
		deldir = -1;
	}

	S32 num_updates = 0;
	for (i = start; num_updates < count;)
	{
		if (i >= count)
		{
			i = 0;
		}
		if (i < 0)
		{
			i = count - 1;
		}

		if (!mViewerPartSources[i]->isDead())
		{
			BOOL upd = TRUE;
			//if (!LLPipeline::sRenderAttachedParticles)
			{
				LLViewerObject* vobj = mViewerPartSources[i]->mSourceObjectp;
				if (vobj && (vobj->getPCode() == LL_PCODE_VOLUME))
				{
					LLVOVolume* vvo = (LLVOVolume *)vobj;
					if (vvo && vvo->isAttachment())
					{
						if (!LLPipeline::sRenderAttachedParticles)
							upd = FALSE;
						else
						{
							LLVOAvatar *avatar = vvo->getAvatar();
							if(avatar && avatar->isVisuallyMuted())
								upd = FALSE;
						}
					}
				}
			}

			if (upd) 
			{
				mViewerPartSources[i]->update(dt);
			}
		}

		if (mViewerPartSources[i]->isDead())
		{
			mViewerPartSources.erase(mViewerPartSources.begin() + i);
			count--;
			i+=deldir;
		}
		else
        {
			 i += dir;
        }
		num_updates++;
	}

	count = (S32) mViewerPartGroups.size();
	for (i = 0; i < count; i++)
	{
		LLViewerObject* vobj = mViewerPartGroups[i]->mVOPartGroupp;

		S32 visirate = 1;
		if (vobj)
		{
			LLSpatialGroup* group = vobj->mDrawable->getSpatialGroup();
			if (group && !group->isVisible()) // && !group->isState(LLSpatialGroup::OBJECT_DIRTY))
			{
				visirate = 8;
			}
		}

		if ((LLDrawable::getCurrentFrame()+mViewerPartGroups[i]->mID)%visirate == 0)
		{
			if (vobj)
			{
				gPipeline.markRebuild(vobj->mDrawable, LLDrawable::REBUILD_ALL, TRUE);
			}
			mViewerPartGroups[i]->updateParticles(dt * visirate);
			mViewerPartGroups[i]->mSkippedTime=0.0f;
			if (!mViewerPartGroups[i]->getCount())
			{
				delete mViewerPartGroups[i];
				mViewerPartGroups.erase(mViewerPartGroups.begin() + i);
				i--;
				count--;
			}
		}
		else
		{	
			mViewerPartGroups[i]->mSkippedTime+=dt;
		}

	}
	if (LLDrawable::getCurrentFrame()%16==0)
	{
		if (sParticleCount > sMaxParticleCount * 0.875f
		    && sParticleAdaptiveRate < 2.0f)
		{
			sParticleAdaptiveRate *= PART_ADAPT_RATE_MULT;
		}
		else
		{
			if (sParticleCount < sMaxParticleCount * 0.5f
			    && sParticleAdaptiveRate > 0.03125f)
			{
				sParticleAdaptiveRate *= PART_ADAPT_RATE_MULT_RECIP;
			}
		}
	}

	updatePartBurstRate() ;

	//llinfos << "Particles: " << sParticleCount << " Adaptive Rate: " << sParticleAdaptiveRate << llendl;
}