C++ LLSpatialGroup类代码示例

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;
			}
		}

//.........这里部分代码省略.........

void LLSpatialBridge::setVisible(LLCamera& camera_in, std::vector<LLDrawable*>* results, BOOL for_select)
{
	if (!gPipeline.hasRenderType(mDrawableType))
	{
		return;
	}


	//HACK don't draw attachments for avatars that haven't been visible in more than a frame
	LLViewerObject *vobj = mDrawable->getVObj();
	if (vobj && vobj->isAttachment() && !vobj->isHUDAttachment())
	{
		LLDrawable* av;
		LLDrawable* parent = mDrawable->getParent();

		if (parent)
		{
			LLViewerObject* objparent = parent->getVObj();
			av = objparent->mDrawable;
			LLSpatialGroup* group = av->getSpatialGroup();

			BOOL impostor = FALSE;
			BOOL loaded = FALSE;
			if (objparent->isAvatar())
			{
				LLVOAvatar* avatarp = (LLVOAvatar*) objparent;
				if (avatarp->isVisible())
				{
					impostor = objparent->isAvatar() && ((LLVOAvatar*) objparent)->isImpostor();
					loaded   = objparent->isAvatar() && ((LLVOAvatar*) objparent)->isFullyLoaded();
				}
				else
				{
					return;
				}
			}

			if (!group ||
				LLDrawable::getCurrentFrame() - av->mVisible > 1 ||
				impostor ||
				!loaded)
			{
				return;
			}
		}
		else
		{
			static const LLCachedControl<bool> draw_orphans("ShyotlDrawOrphanAttachments",false);
			if(!draw_orphans)
				return;
		}
	}
	

	LLSpatialGroup* group = (LLSpatialGroup*) mOctree->getListener(0);
	group->rebound();
	
	LLVector4a center;
	center.setAdd(mExtents[0], mExtents[1]);
	center.mul(0.5f);
	LLVector4a size;
	size.setSub(mExtents[1], mExtents[0]);
	size.mul(0.5f);

	if ((LLPipeline::sShadowRender && camera_in.AABBInFrustum(center, size)) ||
		LLPipeline::sImpostorRender ||
		(camera_in.AABBInFrustumNoFarClip(center, size) && 
		AABBSphereIntersect(mExtents[0], mExtents[1], camera_in.getOrigin(), camera_in.mFrustumCornerDist)))
	{
		if (!LLPipeline::sImpostorRender &&
			!LLPipeline::sShadowRender && 
			LLPipeline::calcPixelArea(center, size, camera_in) < FORCE_INVISIBLE_AREA)
		{
			return;
		}

		LLDrawable::setVisible(camera_in);
		
		if (for_select)
		{
			results->push_back(mDrawable);
			if (mDrawable->getVObj())
			{
				LLViewerObject::const_child_list_t& child_list = mDrawable->getVObj()->getChildren();
				for (LLViewerObject::child_list_t::const_iterator iter = child_list.begin();
					 iter != child_list.end(); iter++)
				{
					LLViewerObject* child = *iter;
					LLDrawable* drawable = child->mDrawable;					
					results->push_back(drawable);
				}
			}
		}
		else 
		{
			LLCamera trans_camera = transformCamera(camera_in);
			LLOctreeMarkNotCulled culler(&trans_camera);
			culler.traverse(mOctree);
		}		
	}
//.........这里部分代码省略.........

void LLSpatialBridge::updateSpatialExtents()
{
	LLSpatialGroup* root = (LLSpatialGroup*) mOctree->getListener(0);
	
	{
		LLFastTimer ftm(FTM_CULL_REBOUND);
		root->rebound();
	}
	
	LLVector4a offset;
	LLVector4a size = root->mBounds[1];
		
	//VECTORIZE THIS
	LLMatrix4a mat;
	mat.loadu(mDrawable->getXform()->getWorldMatrix());

	LLVector4a t;
	t.splat(0.f);

	LLVector4a center;
	mat.affineTransform(t, center);
	
	mat.rotate(root->mBounds[0], offset);
	center.add(offset);
	
	LLVector4a v[4];

	//get 4 corners of bounding box
	mat.rotate(size,v[0]);

	LLVector4a scale;
	
	scale.set(-1.f, -1.f, 1.f);
	scale.mul(size);
	mat.rotate(scale, v[1]);
	
	scale.set(1.f, -1.f, -1.f);
	scale.mul(size);
	mat.rotate(scale, v[2]);
	
	scale.set(-1.f, 1.f, -1.f);
	scale.mul(size);
	mat.rotate(scale, v[3]);

	
	LLVector4a& newMin = mExtents[0];
	LLVector4a& newMax = mExtents[1];
	
	newMin = newMax = center;
	
	for (U32 i = 0; i < 4; i++)
	{
		LLVector4a delta;
		delta.setAbs(v[i]);
		LLVector4a min;
		min.setSub(center, delta);
		LLVector4a max;
		max.setAdd(center, delta);

		newMin.setMin(newMin, min);
		newMax.setMax(newMax, max);
	}
	
	LLVector4a diagonal;
	diagonal.setSub(newMax, newMin);
	mRadius = diagonal.getLength3().getF32() * 0.5f;
	
	mPositionGroup.setAdd(newMin,newMax);
	mPositionGroup.mul(0.5f);
	updateBinRadius();
}

	virtual void traverse(const LLOctreeNode<LLDrawable>* node)
	{
		LLSpatialGroup* group = (LLSpatialGroup*) node->getListener(0);
		group->setVisible();
		LLOctreeTraveler<LLDrawable>::traverse(node);
	}

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