C++ LLSpatialGroup::isVisible方法代码示例

BOOL LLDrawable::isVisible() const
{
	if (mVisible == sCurVisible)
	{
		return TRUE;
	}
	
#if 0
	//disabling this code fixes DEV-20105.  Leaving in place in case some other bug pops up as a a result.
	//should be safe to just always ask the spatial group for visibility.
	if (isActive())
	{
		if (isRoot())
		{
			LLSpatialGroup* group = mSpatialBridge.notNull() ? mSpatialBridge->getSpatialGroup() :
									getSpatialGroup();
			if (group && group->isVisible())
			{
				mVisible = sCurVisible;
				return TRUE;
			}
		}
		else
		{
			if (getParent()->isVisible())
			{
				mVisible = sCurVisible;
				return TRUE;
			}
		}
	}
	else
#endif
	{
		LLSpatialGroup* group = getSpatialGroup();
		if (group && group->isVisible())
		{
			mVisible = sCurVisible;
			return TRUE;
		}
	}

	return FALSE;
}

BOOL LLVOPartGroup::updateGeometry(LLDrawable *drawable)
{
	LLFastTimer ftm(FTM_UPDATE_PARTICLES);

	dirtySpatialGroup();
	
	S32 num_parts = mViewerPartGroupp->getCount();
	LLFace *facep;
	LLSpatialGroup* group = drawable->getSpatialGroup();
	if (!group && num_parts)
	{
		drawable->movePartition();
		group = drawable->getSpatialGroup();
	}

	if (group && group->isVisible())
	{
		dirtySpatialGroup(TRUE);
	}

	if (!num_parts)
	{
		if (group && drawable->getNumFaces())
		{
			group->setState(LLSpatialGroup::GEOM_DIRTY);
		}
		drawable->setNumFaces(0, NULL, getTEImage(0));
		return TRUE;
	}

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

	if (num_parts > drawable->getNumFaces())
	{
		drawable->setNumFacesFast(num_parts+num_parts/4, NULL, getTEImage(0));
	}

	F32 tot_area = 0;

	F32 max_area = LLViewerPartSim::getMaxPartCount() * MAX_PARTICLE_AREA_SCALE; 
	F32 pixel_meter_ratio = LLViewerCamera::getInstance()->getPixelMeterRatio();
	pixel_meter_ratio *= pixel_meter_ratio;

	LLViewerPartSim::checkParticleCount(mViewerPartGroupp->mParticles.size()) ;

	S32 count=0;
	mDepth = 0.f;
	S32 i = 0 ;
	LLVector3 camera_agent = getCameraPosition();
	
	F32 max_scale = 0.f;


	for (i = 0 ; i < (S32)mViewerPartGroupp->mParticles.size(); i++)
	{
		const LLViewerPart *part = mViewerPartGroupp->mParticles[i];


		//remember the largest particle
		max_scale = llmax(max_scale, part->mScale.mV[0], part->mScale.mV[1]);

		if (part->mFlags & LLPartData::LL_PART_RIBBON_MASK)
		{ //include ribbon segment length in scale
			const LLVector3* pos_agent = NULL;
			if (part->mParent)
			{
				pos_agent = &(part->mParent->mPosAgent);
			}
			else if (part->mPartSourcep.notNull())
			{
				pos_agent = &(part->mPartSourcep->mPosAgent);
			}

			if (pos_agent)
			{
				F32 dist = (*pos_agent-part->mPosAgent).length();

				max_scale = llmax(max_scale, dist);
			}
		}

		LLVector3 part_pos_agent(part->mPosAgent);
		LLVector3 at(part_pos_agent - camera_agent);

		
		F32 camera_dist_squared = at.lengthSquared();
		F32 inv_camera_dist_squared;
		if (camera_dist_squared > 1.f)
			inv_camera_dist_squared = 1.f / camera_dist_squared;
		else
			inv_camera_dist_squared = 1.f;

		llassert(llfinite(inv_camera_dist_squared));
		llassert(!llisnan(inv_camera_dist_squared));

		F32 area = part->mScale.mV[0] * part->mScale.mV[1] * inv_camera_dist_squared;
		tot_area = llmax(tot_area, area);
//.........这里部分代码省略.........

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(LLFastTimer::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())
					{
						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);
//.........这里部分代码省略.........

BOOL LLVOClouds::updateGeometry(LLDrawable *drawable)
{
	LLFastTimer ftm(FTM_UPDATE_CLOUDS);
	
	dirtySpatialGroup();

	S32 num_parts = mCloudGroupp->getNumPuffs();
	LLFace *facep;
	LLSpatialGroup* group = drawable->getSpatialGroup();
	if (!group && num_parts)
	{
		drawable->movePartition();
		group = drawable->getSpatialGroup();
	}

	if (group && group->isVisible())
	{
		dirtySpatialGroup(TRUE);
	}

	if (!num_parts)
	{
		if (group && drawable->getNumFaces())
		{
			group->setState(LLSpatialGroup::GEOM_DIRTY);
		}
		drawable->setNumFaces(0, NULL, getTEImage(0));
		return TRUE;
	}

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

	if (num_parts > drawable->getNumFaces())
	{
		drawable->setNumFacesFast(num_parts+num_parts/4, NULL, getTEImage(0));
	}

	mDepth = (getPositionAgent()-LLViewerCamera::getInstance()->getOrigin())*LLViewerCamera::getInstance()->getAtAxis();

	S32 face_indx = 0;
	for ( ;	face_indx < num_parts; face_indx++)
	{
		facep = drawable->getFace(face_indx);
		if (!facep)
		{
			llwarns << "No facep for index " << face_indx << llendl;
			continue;
		}

		facep->setTEOffset(face_indx);
		facep->setSize(4, 6);
		
		facep->setViewerObject(this);
		
		const LLCloudPuff &puff = mCloudGroupp->getPuff(face_indx);
		const LLVector3 puff_pos_agent = gAgent.getPosAgentFromGlobal(puff.getPositionGlobal());
		facep->mCenterLocal = puff_pos_agent;
		/// Update cloud color based on sun color.
		LLColor4 float_color(LLColor3(gSky.getSunDiffuseColor() + gSky.getSunAmbientColor()),puff.getAlpha());
		facep->setFaceColor(float_color);
		facep->setTexture(getTEImage(0));
	}
	for ( ; face_indx < drawable->getNumFaces(); face_indx++)
	{
		facep = drawable->getFace(face_indx);
		if (!facep)
		{
			llwarns << "No facep for index " << face_indx << llendl;
			continue;
		}

		facep->setTEOffset(face_indx);
		facep->setSize(0,0);
	}

	mDrawable->movePartition();
	return TRUE;
}

BOOL LLVOPartGroup::updateGeometry(LLDrawable *drawable)
{
	LLFastTimer ftm(LLFastTimer::FTM_UPDATE_PARTICLES);

	dirtySpatialGroup();
	
	S32 num_parts = mViewerPartGroupp->getCount();
	LLFace *facep;
	LLSpatialGroup* group = drawable->getSpatialGroup();
	if (!group && num_parts)
	{
		drawable->movePartition();
		group = drawable->getSpatialGroup();
	}

	if (group && group->isVisible())
	{
		dirtySpatialGroup(TRUE);
	}

	if (!num_parts)
	{
		if (group && drawable->getNumFaces())
		{
			group->setState(LLSpatialGroup::GEOM_DIRTY);
		}
		drawable->setNumFaces(0, NULL, getTEImage(0));
		LLPipeline::sCompiles++;
		return TRUE;
	}

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

	if (num_parts > drawable->getNumFaces())
	{
		drawable->setNumFacesFast(num_parts+num_parts/4, NULL, getTEImage(0));
	}

	F32 tot_area = 0;

	F32 max_area = LLViewerPartSim::getMaxPartCount() * MAX_PARTICLE_AREA_SCALE; 
	F32 pixel_meter_ratio = LLViewerCamera::getInstance()->getPixelMeterRatio();
	pixel_meter_ratio *= pixel_meter_ratio;

	LLViewerPartSim::checkParticleCount(mViewerPartGroupp->mParticles.size()) ;

	S32 count=0;
	mDepth = 0.f;
	S32 i = 0 ;
	LLVector3 camera_agent = getCameraPosition();
	for (i = 0 ; i < (S32)mViewerPartGroupp->mParticles.size(); i++)
	{
		const LLViewerPart *part = mViewerPartGroupp->mParticles[i];

		LLVector3 part_pos_agent(part->mPosAgent);
		LLVector3 at(part_pos_agent - camera_agent);

		F32 camera_dist_squared = at.lengthSquared();
		F32 inv_camera_dist_squared;
		if (camera_dist_squared > 1.f)
			inv_camera_dist_squared = 1.f / camera_dist_squared;
		else
			inv_camera_dist_squared = 1.f;
		F32 area = part->mScale.mV[0] * part->mScale.mV[1] * inv_camera_dist_squared;
		tot_area = llmax(tot_area, area);
 		
		if (tot_area > max_area)
		{
			break;
		}
	
		count++;

		facep = drawable->getFace(i);
		if (!facep)
		{
			llwarns << "No face found for index " << i << "!" << llendl;
			continue;
		}

		facep->setTEOffset(i);
		const F32 NEAR_PART_DIST_SQ = 5.f*5.f;  // Only discard particles > 5 m from the camera
		const F32 MIN_PART_AREA = .005f*.005f;  // only less than 5 mm x 5 mm at 1 m from camera
		
		if (camera_dist_squared > NEAR_PART_DIST_SQ && area < MIN_PART_AREA)
		{
			facep->setSize(0, 0);
			continue;
		}

		facep->setSize(4, 6);
		
		facep->setViewerObject(this);

		if (part->mFlags & LLPartData::LL_PART_EMISSIVE_MASK)
		{
			facep->setState(LLFace::FULLBRIGHT);
//.........这里部分代码省略.........