C++ LLViewerRegion类代码示例

// virtual
BOOL LLFloaterReporter::postBuild()
{
	LLSLURL slurl;
	LLAgentUI::buildSLURL(slurl);
	getChild<LLUICtrl>("abuse_location_edit")->setValue(slurl.getSLURLString());

	enableControls(TRUE);

	// convert the position to a string
	LLVector3d pos = gAgent.getPositionGlobal();
	LLViewerRegion *regionp = gAgent.getRegion();
	if (regionp)
	{
		getChild<LLUICtrl>("sim_field")->setValue(regionp->getName());
		pos -= regionp->getOriginGlobal();
	}
	setPosBox(pos);

	// Take a screenshot, but don't draw this floater.
	setVisible(FALSE);
	takeScreenshot();
	setVisible(TRUE);

	// Default text to be blank
	getChild<LLUICtrl>("object_name")->setValue(LLStringUtil::null);
	getChild<LLUICtrl>("owner_name")->setValue(LLStringUtil::null);
	mOwnerName = LLStringUtil::null;

	getChild<LLUICtrl>("summary_edit")->setFocus(TRUE);

	mDefaultSummary = getChild<LLUICtrl>("details_edit")->getValue().asString();

	// send a message and ask for information about this region - 
	// result comes back in processRegionInfo(..)
	LLMessageSystem* msg = gMessageSystem;
	msg->newMessage("RequestRegionInfo");
	msg->nextBlock("AgentData");
	msg->addUUID("AgentID", gAgent.getID());
	msg->addUUID("SessionID", gAgent.getSessionID());
	gAgent.sendReliableMessage();
	
	
	// abuser name is selected from a list
	LLUICtrl* le = getChild<LLUICtrl>("abuser_name_edit");
	le->setEnabled( false );

	setPosBox((LLVector3d)mPosition.getValue());
	LLButton* pick_btn = getChild<LLButton>("pick_btn");
	pick_btn->setImages(std::string("tool_face.tga"),
						std::string("tool_face_active.tga") );
	childSetAction("pick_btn", onClickObjPicker, this);

	childSetAction("select_abuser", boost::bind(&LLFloaterReporter::onClickSelectAbuser, this));

	childSetAction("send_btn", onClickSend, this);
	childSetAction("cancel_btn", onClickCancel, this);
	
	// grab the user's name
	std::string reporter = LLSLURL("agent", gAgent.getID(), "inspect").getSLURLString();
	getChild<LLUICtrl>("reporter_field")->setValue(reporter);
	
	center();

	return TRUE;
}

//.........这里部分代码省略.........
		{
			// ...from a normal user, lookup the name and fill in later.
			// *NOTE: Do not do this for chat history logs, otherwise the viewer
			// will flood the People API with lookup requests on startup

			// Start with blank so sample data from XUI XML doesn't
			// flash on the screen
			user_name->setValue( LLSD() );
			LLAvatarNameCache::get(mAvatarID,
				boost::bind(&LLChatHistoryHeader::onAvatarNameCache, this, _1, _2));
		}
		else if (chat.mChatStyle == CHAT_STYLE_HISTORY ||
				 mSourceType == CHAT_SOURCE_AGENT)
		{
			//if it's an avatar name with a username add formatting
			S32 username_start = chat.mFromName.rfind(" (");
			S32 username_end = chat.mFromName.rfind(')');
			
			if (username_start != std::string::npos &&
				username_end == (chat.mFromName.length() - 1))
			{
				mFrom = chat.mFromName.substr(0, username_start);
				user_name->setValue(mFrom);

				if (gSavedSettings.getBOOL("NameTagShowUsernames"))
				{
					std::string username = chat.mFromName.substr(username_start + 2);
					username = username.substr(0, username.length() - 1);
					LLStyle::Params style_params_name;
					LLColor4 userNameColor = LLUIColorTable::instance().getColor("EmphasisColor");
					style_params_name.color(userNameColor);
					style_params_name.font.name("SansSerifSmall");
					style_params_name.font.style("NORMAL");
					style_params_name.readonly_color(userNameColor);
					user_name->appendText("  - " + username, FALSE, style_params_name);
				}
			}
			else
			{
				mFrom = chat.mFromName;
				user_name->setValue(mFrom);
				updateMinUserNameWidth();
			}
		}
		else
		{
			// ...from an object, just use name as given
			mFrom = chat.mFromName;
			user_name->setValue(mFrom);
			updateMinUserNameWidth();
		}


		setTimeField(chat);

		// Set up the icon.
		LLAvatarIconCtrl* icon = getChild<LLAvatarIconCtrl>("avatar_icon");

		if(mSourceType != CHAT_SOURCE_AGENT ||	mAvatarID.isNull())
			icon->setDrawTooltip(false);

		switch (mSourceType)
		{
			case CHAT_SOURCE_AGENT:
				icon->setValue(chat.mFromID);
				break;
			case CHAT_SOURCE_OBJECT:
				icon->setValue(LLSD("OBJECT_Icon"));
				break;
			case CHAT_SOURCE_SYSTEM:
				icon->setValue(LLSD("SL_Logo"));
				break;
			case CHAT_SOURCE_UNKNOWN: 
				icon->setValue(LLSD("Unknown_Icon"));
		}

		// In case the message came from an object, save the object info
		// to be able properly show its profile.
		if ( chat.mSourceType == CHAT_SOURCE_OBJECT)
		{
			std::string slurl = args["slurl"].asString();
			if (slurl.empty())
			{
				LLViewerRegion *region = LLWorld::getInstance()->getRegionFromPosAgent(chat.mPosAgent);
				if(region)
				{
					LLSLURL region_slurl(region->getName(), chat.mPosAgent);
					slurl = region_slurl.getLocationString();
				}
			}

			LLSD payload;
			payload["object_id"]	= chat.mFromID;
			payload["name"]			= chat.mFromName;
			payload["owner_id"]		= chat.mOwnerID;
			payload["slurl"]		= LLWeb::escapeURL(slurl);

			mObjectData = payload;
		}
	}

void LLDrawPoolTerrain::renderFullShader()
{
	// Hack! Get the region that this draw pool is rendering from!
	LLViewerRegion *regionp = mDrawFace[0]->getDrawable()->getVObj()->getRegion();
	LLVLComposition *compp = regionp->getComposition();
	LLViewerImage *detail_texture0p = compp->mDetailTextures[0];
	LLViewerImage *detail_texture1p = compp->mDetailTextures[1];
	LLViewerImage *detail_texture2p = compp->mDetailTextures[2];
	LLViewerImage *detail_texture3p = compp->mDetailTextures[3];

	LLVector3d region_origin_global = gAgent.getRegion()->getOriginGlobal();
	F32 offset_x = (F32)fmod(region_origin_global.mdV[VX], 1.0/(F64)sDetailScale)*sDetailScale;
	F32 offset_y = (F32)fmod(region_origin_global.mdV[VY], 1.0/(F64)sDetailScale)*sDetailScale;

	LLVector4 tp0, tp1;
	
	tp0.setVec(sDetailScale, 0.0f, 0.0f, offset_x);
	tp1.setVec(0.0f, sDetailScale, 0.0f, offset_y);

	//
	// detail texture 0
	//
	S32 detail0 = sShader->enableTexture(LLViewerShaderMgr::TERRAIN_DETAIL0);
	gGL.getTexUnit(detail0)->bind(detail_texture0p);
	gGL.getTexUnit(0)->activate();

	glEnable(GL_TEXTURE_GEN_S);
	glEnable(GL_TEXTURE_GEN_T);
	glTexGeni(GL_S, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);
	glTexGeni(GL_T, GL_TEXTURE_GEN_MODE, GL_OBJECT_LINEAR);

	glTexGenfv(GL_S, GL_OBJECT_PLANE, tp0.mV);
	glTexGenfv(GL_T, GL_OBJECT_PLANE, tp1.mV);
	glMatrixMode(GL_TEXTURE);
	glLoadIdentity();
	glMatrixMode(GL_MODELVIEW);

	//
	// detail texture 1
	//
	S32 detail1 = sShader->enableTexture(LLViewerShaderMgr::TERRAIN_DETAIL1); 
	gGL.getTexUnit(detail1)->bind(detail_texture1p);
	
	/// ALPHA TEXTURE COORDS 0:
	gGL.getTexUnit(1)->activate();
	glMatrixMode(GL_TEXTURE);
	glLoadIdentity();
	glMatrixMode(GL_MODELVIEW);
	
	// detail texture 2
	//
	S32 detail2 = sShader->enableTexture(LLViewerShaderMgr::TERRAIN_DETAIL2);
	gGL.getTexUnit(detail2)->bind(detail_texture2p);

	gGL.getTexUnit(2)->activate();
	
	/// ALPHA TEXTURE COORDS 1:
	glMatrixMode(GL_TEXTURE);
	glLoadIdentity();
	glTranslatef(-2.f, 0.f, 0.f);
	glMatrixMode(GL_MODELVIEW);

	//
	// detail texture 3
	//
	S32 detail3 = sShader->enableTexture(LLViewerShaderMgr::TERRAIN_DETAIL3);
	gGL.getTexUnit(detail3)->bind(detail_texture3p);
	
	/// ALPHA TEXTURE COORDS 2:
	gGL.getTexUnit(3)->activate();
	glMatrixMode(GL_TEXTURE);
	glLoadIdentity();
	glTranslatef(-1.f, 0.f, 0.f);
	glMatrixMode(GL_MODELVIEW);

	//
	// Alpha Ramp 
	//
	S32 alpha_ramp = sShader->enableTexture(LLViewerShaderMgr::TERRAIN_ALPHARAMP);
	gGL.getTexUnit(alpha_ramp)->bind(m2DAlphaRampImagep.get());
		
	// GL_BLEND disabled by default
	drawLoop();

	// Disable multitexture
	sShader->disableTexture(LLViewerShaderMgr::TERRAIN_ALPHARAMP);
	sShader->disableTexture(LLViewerShaderMgr::TERRAIN_DETAIL0);
	sShader->disableTexture(LLViewerShaderMgr::TERRAIN_DETAIL1);
	sShader->disableTexture(LLViewerShaderMgr::TERRAIN_DETAIL2);
	sShader->disableTexture(LLViewerShaderMgr::TERRAIN_DETAIL3);

	gGL.getTexUnit(alpha_ramp)->unbind(LLTexUnit::TT_TEXTURE);
	gGL.getTexUnit(4)->disable();
	gGL.getTexUnit(4)->activate();
	glDisable(GL_TEXTURE_GEN_S);
	glDisable(GL_TEXTURE_GEN_T);
	glMatrixMode(GL_TEXTURE);
	glLoadIdentity();
	glMatrixMode(GL_MODELVIEW);

//.........这里部分代码省略.........

void LLViewerPartGroup::updateParticles(const F32 lastdt)
{
	LLMemType mt(LLMemType::MTYPE_PARTICLES);
	F32 dt;
	
	LLVector3 gravity(0.f, 0.f, GRAVITY);

	LLViewerPartSim::checkParticleCount(mParticles.size());

	LLViewerCamera* camera = LLViewerCamera::getInstance();
	LLViewerRegion *regionp = getRegion();
	S32 end = (S32) mParticles.size();
	for (S32 i = 0 ; i < (S32)mParticles.size();)
	{
		LLVector3 a(0.f, 0.f, 0.f);
		LLViewerPart* part = mParticles[i] ;

		dt = lastdt + mSkippedTime - part->mSkipOffset;
		part->mSkipOffset = 0.f;

		// Update current time
		const F32 cur_time = part->mLastUpdateTime + dt;
		const F32 frac = cur_time / part->mMaxAge;

		// "Drift" the object based on the source object
		if (part->mFlags & LLPartData::LL_PART_FOLLOW_SRC_MASK)
		{
			part->mPosAgent = part->mPartSourcep->mPosAgent;
			part->mPosAgent += part->mPosOffset;
		}

		// Do a custom callback if we have one...
		if (part->mVPCallback)
		{
			(*part->mVPCallback)(*part, dt);
		}

		if (part->mFlags & LLPartData::LL_PART_WIND_MASK)
		{
			LLVector3 tempVel(part->mVelocity);
			part->mVelocity *= 1.f - 0.1f*dt;
			part->mVelocity += 0.1f*dt*regionp->mWind.getVelocity(regionp->getPosRegionFromAgent(part->mPosAgent));
		}

		// Now do interpolation towards a target
		if (part->mFlags & LLPartData::LL_PART_TARGET_POS_MASK)
		{
			F32 remaining = part->mMaxAge - part->mLastUpdateTime;
			F32 step = dt / remaining;

			step = llclamp(step, 0.f, 0.1f);
			step *= 5.f;
			// we want a velocity that will result in reaching the target in the 
			// Interpolate towards the target.
			LLVector3 delta_pos = part->mPartSourcep->mTargetPosAgent - part->mPosAgent;

			delta_pos /= remaining;

			part->mVelocity *= (1.f - step);
			part->mVelocity += step*delta_pos;
		}


		if (part->mFlags & LLPartData::LL_PART_TARGET_LINEAR_MASK)
		{
			LLVector3 delta_pos = part->mPartSourcep->mTargetPosAgent - part->mPartSourcep->mPosAgent;			
			part->mPosAgent = part->mPartSourcep->mPosAgent;
			part->mPosAgent += frac*delta_pos;
			part->mVelocity = delta_pos;
		}
		else
		{
			// Do velocity interpolation
			part->mPosAgent += dt*part->mVelocity;
			part->mPosAgent += 0.5f*dt*dt*part->mAccel;
			part->mVelocity += part->mAccel*dt;
		}

		// Do a bounce test
		if (part->mFlags & LLPartData::LL_PART_BOUNCE_MASK)
		{
			// Need to do point vs. plane check...
			// For now, just check relative to object height...
			F32 dz = part->mPosAgent.mV[VZ] - part->mPartSourcep->mPosAgent.mV[VZ];
			if (dz < 0)
			{
				part->mPosAgent.mV[VZ] += -2.f*dz;
				part->mVelocity.mV[VZ] *= -0.75f;
			}
		}


		// Reset the offset from the source position
		if (part->mFlags & LLPartData::LL_PART_FOLLOW_SRC_MASK)
		{
			part->mPosOffset = part->mPosAgent;
			part->mPosOffset -= part->mPartSourcep->mPosAgent;
		}

		// Do color interpolation
//.........这里部分代码省略.........

// Reset all the values for the parcel in preparation for a sale
void LLFloaterAuction::doResetParcel()
{
	LLParcel* parcelp = mParcelp->getParcel();
	LLViewerRegion* region = LLViewerParcelMgr::getInstance()->getSelectionRegion();

	if (parcelp
		&& region
		&& !mParcelUpdateCapUrl.empty())
	{
		LLSD body;
		std::string empty;

		// request new properties update from simulator
		U32 message_flags = 0x01;
		body["flags"] = ll_sd_from_U32(message_flags);

		// Set all the default parcel properties for auction
		body["local_id"] = parcelp->getLocalID();

		U32 parcel_flags = PF_ALLOW_LANDMARK |
						   PF_ALLOW_FLY	|
						   PF_CREATE_GROUP_OBJECTS |
						   PF_ALLOW_ALL_OBJECT_ENTRY |
						   PF_ALLOW_GROUP_OBJECT_ENTRY |
						   PF_ALLOW_GROUP_SCRIPTS |
						   PF_RESTRICT_PUSHOBJECT |
						   PF_SOUND_LOCAL |
						   PF_ALLOW_VOICE_CHAT |
						   PF_USE_ESTATE_VOICE_CHAN;

		body["parcel_flags"] = ll_sd_from_U32(parcel_flags);
		
		// Build a parcel name like "Ahern (128,128) PG 4032m"
		std::ostringstream parcel_name;
		LLVector3 center_point( parcelp->getCenterpoint() );
		center_point.snap(0);		// Get rid of fractions
		parcel_name << region->getName() 
					<< " ("
					<< (S32) center_point.mV[VX]
					<< ","
					<< (S32) center_point.mV[VY]						
					<< ") "
					<< region->getSimAccessString()
					<< " "
					<< parcelp->getArea()
					<< "m";

		std::string new_name(parcel_name.str().c_str());
		body["name"] = new_name;
		getChild<LLUICtrl>("parcel_text")->setValue(new_name);	// Set name in dialog as well, since it won't get updated otherwise

		body["sale_price"] = (S32) 0;
		body["description"] = empty;
		body["music_url"] = empty;
		body["media_url"] = empty;
		body["media_desc"] = empty;
		body["media_type"] = LLMIMETypes::getDefaultMimeType();
		body["media_width"] = (S32) 0;
		body["media_height"] = (S32) 0;
		body["auto_scale"] = (S32) 0;
		body["media_loop"] = (S32) 0;
		body["obscure_media"] = (S32) 0; // OBSOLETE - no longer used
		body["obscure_music"] = (S32) 0; // OBSOLETE - no longer used
		body["media_id"] = LLUUID::null;
		body["group_id"] = MAINTENANCE_GROUP_ID;	// Use maintenance group
		body["pass_price"] = (S32) 10;		// Defaults to $10
		body["pass_hours"] = 0.0f;
		body["category"] = (U8) LLParcel::C_NONE;
		body["auth_buyer_id"] = LLUUID::null;
		body["snapshot_id"] = LLUUID::null;
		body["user_location"] = ll_sd_from_vector3( LLVector3::zero );
		body["user_look_at"] = ll_sd_from_vector3( LLVector3::zero );
		body["landing_type"] = (U8) LLParcel::L_DIRECT;

		llinfos << "Sending parcel update to reset for auction via capability to: "
			<< mParcelUpdateCapUrl << llendl;
		LLHTTPClient::post(mParcelUpdateCapUrl, body, new LLHTTPClient::Responder());

		// Send a message to clear the object return time
		LLMessageSystem *msg = gMessageSystem;
		msg->newMessageFast(_PREHASH_ParcelSetOtherCleanTime);
		msg->nextBlockFast(_PREHASH_AgentData);
		msg->addUUIDFast(_PREHASH_AgentID, gAgent.getID());
		msg->addUUIDFast(_PREHASH_SessionID, gAgent.getSessionID());
		msg->nextBlockFast(_PREHASH_ParcelData);
		msg->addS32Fast(_PREHASH_LocalID, parcelp->getLocalID());
		msg->addS32Fast(_PREHASH_OtherCleanTime, 5);			// 5 minute object auto-return

		msg->sendReliable(region->getHost());

		// Clear the access lists
		clearParcelAccessLists(parcelp, region);
	}
}

void LLNetMap::draw()
{
 	static LLFrameTimer map_timer;

	if (mObjectImagep.isNull())
	{
		createObjectImage();
	}

	if (gSavedSettings.getS32( "MiniMapCenter") != MAP_CENTER_NONE)
	{
		mCurPanX = lerp(mCurPanX, mTargetPanX, LLCriticalDamp::getInterpolant(0.1f));
		mCurPanY = lerp(mCurPanY, mTargetPanY, LLCriticalDamp::getInterpolant(0.1f));
	}

	F32 rotation = 0;

	// Prepare a scissor region
	{
		LLGLEnable scissor(GL_SCISSOR_TEST);

		{
			gGL.getTexUnit(0)->unbind(LLTexUnit::TT_TEXTURE);
			LLLocalClipRect clip(getLocalRect());

			glMatrixMode(GL_MODELVIEW);

			// Draw background rectangle
			if(isBackgroundVisible())
			{
				gGL.color4fv(isBackgroundOpaque() ? getBackgroundColor().mV : getTransparentColor().mV);
				gl_rect_2d(0, getRect().getHeight(), getRect().getWidth(), 0);
			}
		}

		// region 0,0 is in the middle
		S32 center_sw_left = getRect().getWidth() / 2 + llfloor(mCurPanX);
		S32 center_sw_bottom = getRect().getHeight() / 2 + llfloor(mCurPanY);

		gGL.pushMatrix();

		gGL.translatef( (F32) center_sw_left, (F32) center_sw_bottom, 0.f);
		
		BOOL rotate_map = gSavedSettings.getBOOL( "MiniMapRotate" );
		if (rotate_map)
		{
			// rotate subsequent draws to agent rotation
			rotation = atan2( LLViewerCamera::getInstance()->getAtAxis().mV[VX], LLViewerCamera::getInstance()->getAtAxis().mV[VY] );
			glRotatef( rotation * RAD_TO_DEG, 0.f, 0.f, 1.f);
		}

		// figure out where agent is
		LLColor4 this_region_color = gColors.getColor( "NetMapThisRegion" );
		LLColor4 live_region_color = gColors.getColor( "NetMapLiveRegion" );
		LLColor4 dead_region_color = gColors.getColor( "NetMapDeadRegion" );

		for (LLWorld::region_list_t::const_iterator iter = LLWorld::getInstance()->getRegionList().begin();
			 iter != LLWorld::getInstance()->getRegionList().end(); ++iter)
		{
			LLViewerRegion* regionp = *iter;
			S32 region_width = llround(regionp->getWidth());
			// Find x and y position relative to camera's center.
			LLVector3 origin_agent = regionp->getOriginAgent();
			LLVector3 rel_region_pos = origin_agent - gAgentCamera.getCameraPositionAgent();
			F32 relative_x = (rel_region_pos.mV[0] / region_width) * mScale;
			F32 relative_y = (rel_region_pos.mV[1] / region_width) * mScale;

			// background region rectangle
			F32 bottom =	relative_y;
			F32 left =		relative_x;
			F32 top =		bottom + mScale ;
			F32 right =		left + mScale ;

			gGL.color4fv(regionp == gAgent.getRegion() ? this_region_color.mV : live_region_color.mV);
			if (!regionp->isAlive())
			{
				gGL.color4fv(dead_region_color.mV);
			}


			// Draw using texture.
			gGL.getTexUnit(0)->bind(regionp->getLand().getSTexture());
			gGL.begin(LLRender::QUADS);
				gGL.texCoord2f(0.f, 1.f);
				gGL.vertex2f(left, top);
				gGL.texCoord2f(0.f, 0.f);
				gGL.vertex2f(left, bottom);
				gGL.texCoord2f(1.f, 0.f);
				gGL.vertex2f(right, bottom);
				gGL.texCoord2f(1.f, 1.f);
				gGL.vertex2f(right, top);
			gGL.end();

			// Draw water
			gGL.setAlphaRejectSettings(LLRender::CF_GREATER, ABOVE_WATERLINE_ALPHA / 255.f);
			{
				if (regionp->getLand().getWaterTexture())
				{
					gGL.getTexUnit(0)->bind(regionp->getLand().getWaterTexture());
					gGL.begin(LLRender::QUADS);
//.........这里部分代码省略.........

void LLViewerObjectList::generatePickList(LLCamera &camera)
{
		LLViewerObject *objectp;
		S32 i;
		// Reset all of the GL names to zero.
		for (i = 0; i < mObjects.count(); i++)
		{
			objectp = mObjects[i];
			objectp->mGLName = 0;
		}

		mSelectPickList.clear();

		std::vector<LLDrawable*> pick_drawables;

		for (LLWorld::region_list_t::const_iterator iter = LLWorld::getInstance()->getRegionList().begin(); 
			iter != LLWorld::getInstance()->getRegionList().end(); ++iter)
		{
			LLViewerRegion* region = *iter;
			for (U32 i = 0; i < LLViewerRegion::NUM_PARTITIONS; i++)
			{
				LLSpatialPartition* part = region->getSpatialPartition(i);
				if (part)
				{	
					part->cull(camera, &pick_drawables, TRUE);
				}
			}
		}

		for (std::vector<LLDrawable*>::iterator iter = pick_drawables.begin();
			iter != pick_drawables.end(); iter++)
		{
			LLDrawable* drawablep = *iter;
			if( !drawablep )
				continue;

			LLViewerObject* last_objectp = NULL;
			for (S32 face_num = 0; face_num < drawablep->getNumFaces(); face_num++)
			{
				LLViewerObject* objectp = drawablep->getFace(face_num)->getViewerObject();

				if (objectp && objectp != last_objectp)
				{
					mSelectPickList.insert(objectp);
					last_objectp = objectp;
				}
			}
		}

		LLHUDText::addPickable(mSelectPickList);

		for (std::vector<LLCharacter*>::iterator iter = LLCharacter::sInstances.begin();
			iter != LLCharacter::sInstances.end(); ++iter)
		{
			objectp = (LLVOAvatar*) *iter;
			if (!objectp->isDead())
			{
				if (objectp->mDrawable.notNull() && objectp->mDrawable->isVisible())
				{
					mSelectPickList.insert(objectp);
				}
			}
		}

		// add all hud objects to pick list
		LLVOAvatar* avatarp = gAgent.getAvatarObject();
		if (avatarp)
		{
			for (LLVOAvatar::attachment_map_t::iterator iter = avatarp->mAttachmentPoints.begin(); 
				 iter != avatarp->mAttachmentPoints.end(); )
			{
				LLVOAvatar::attachment_map_t::iterator curiter = iter++;
				LLViewerJointAttachment* attachmentp = curiter->second;
				if (attachmentp->getIsHUDAttachment())
				{
					for (LLViewerJointAttachment::attachedobjs_vec_t::iterator attachment_iter = attachmentp->mAttachedObjects.begin();
						 attachment_iter != attachmentp->mAttachedObjects.end();
						 ++attachment_iter)
					{
						if (LLViewerObject* objectp = (*attachment_iter))
						{
							mSelectPickList.insert(objectp);		
							LLViewerObject::const_child_list_t& child_list = objectp->getChildren();
							for (LLViewerObject::child_list_t::const_iterator iter = child_list.begin();
								 iter != child_list.end(); iter++)
							{
								LLViewerObject* childp = *iter;
								if (childp)
								{
									mSelectPickList.insert(childp);
								}
							}
						}
					}
				}
			}
		}
		
		S32 num_pickables = (S32)mSelectPickList.size() + LLHUDIcon::getNumInstances();

//.........这里部分代码省略.........

//.........这里部分代码省略.........
				if (!drawable || vobjp->getPCode() != LL_PCODE_VOLUME || vobjp->isAttachment())
				{
					return true;
				}
				S32 result = LLViewerCamera::getInstance()->sphereInFrustum(drawable->getPositionAgent(), drawable->getRadius());
				switch (result)
				{
				  case 0:
					LLSelectMgr::getInstance()->unhighlightObjectOnly(vobjp);
					break;
				  case 1:
					// check vertices
					if (!LLViewerCamera::getInstance()->areVertsVisible(vobjp, LLSelectMgr::sRectSelectInclusive))
					{
						LLSelectMgr::getInstance()->unhighlightObjectOnly(vobjp);
					}
					break;
				  default:
					break;
				}
				return true;
			}
		} func;
		LLSelectMgr::getInstance()->getHighlightedObjects()->applyToObjects(&func);
	}

	if (grow_selection)
	{
		std::vector<LLDrawable*> potentials;
				
		for (LLWorld::region_list_t::const_iterator iter = LLWorld::getInstance()->getRegionList().begin(); 
			iter != LLWorld::getInstance()->getRegionList().end(); ++iter)
		{
			LLViewerRegion* region = *iter;
			for (U32 i = 0; i < LLViewerRegion::NUM_PARTITIONS; i++)
			{
				LLSpatialPartition* part = region->getSpatialPartition(i);
				if (part)
				{	
					part->cull(*LLViewerCamera::getInstance(), &potentials, TRUE);
				}
			}
		}
		
		for (std::vector<LLDrawable*>::iterator iter = potentials.begin();
			 iter != potentials.end(); iter++)
		{
			LLDrawable* drawable = *iter;
			LLViewerObject* vobjp = drawable->getVObj();

			if (!drawable || !vobjp ||
				vobjp->getPCode() != LL_PCODE_VOLUME || 
				vobjp->isAttachment() ||
				(deselect && !vobjp->isSelected()))
			{
				continue;
			}

			if (limit_select_distance && dist_vec_squared(drawable->getWorldPosition(), av_pos) > select_dist_squared)
			{
				continue;
			}

// [RLVa:KB] - Checked: 2010-11-29 (RLVa-1.3.0c) | Added: RLVa-1.3.0c
			if ( (rlv_handler_t::isEnabled()) && (!gRlvHandler.canEdit(vobjp)) )
			{

// Per-frame updates of visibility
void LLStatusBar::refresh()
{
	bool net_stats_visible = gSavedSettings.getBOOL("ShowNetStats");
	
	if (net_stats_visible)
	{
		// Adding Net Stat Meter back in
		F32 bwtotal = gViewerThrottle.getMaxBandwidth() / 1000.f;
		mSGBandwidth->setMin(0.f);
		mSGBandwidth->setMax(bwtotal*1.25f);
		mSGBandwidth->setThreshold(0, bwtotal*0.75f);
		mSGBandwidth->setThreshold(1, bwtotal);
		mSGBandwidth->setThreshold(2, bwtotal);
	}
	
	// Get current UTC time, adjusted for the user's clock
	// being off.
	time_t utc_time;
	utc_time = time_corrected();

	std::string timeStr = getString("time");
	LLSD substitution;
	substitution["datetime"] = (S32) utc_time;
	LLStringUtil::format (timeStr, substitution);
	mTextTime->setText(timeStr);

	// set the tooltip to have the date
	std::string dtStr = getString("timeTooltip");
	LLStringUtil::format (dtStr, substitution);
	mTextTime->setToolTip (dtStr);

	LLRect r;
	const S32 MENU_RIGHT = gMenuBarView->getRightmostMenuEdge();
	S32 x = MENU_RIGHT + MENU_PARCEL_SPACING;
	S32 y = 0;

	// reshape menu bar to its content's width
	if (MENU_RIGHT != gMenuBarView->getRect().getWidth())
	{
		gMenuBarView->reshape(MENU_RIGHT, gMenuBarView->getRect().getHeight());
	}

	LLViewerRegion *region = gAgent.getRegion();
	LLParcel *parcel = LLViewerParcelMgr::getInstance()->getAgentParcel();

	LLRect buttonRect;

	if (LLHUDIcon::iconsNearby())
	{
		childGetRect( "scriptout", buttonRect );
		r.setOriginAndSize( x, y, buttonRect.getWidth(), buttonRect.getHeight());
		childSetRect("scriptout",r);
		childSetVisible("scriptout", true);
		x += buttonRect.getWidth();
	}
	else
	{
		childSetVisible("scriptout", false);
	}

	if (gAgent.getCameraMode() == CAMERA_MODE_MOUSELOOK &&
		((region && region->getAllowDamage()) || (parcel && parcel->getAllowDamage())))
	{
		// set visibility based on flashing
		if( mHealthTimer->hasExpired() )
		{
			childSetVisible("health", true);
		}
		else
		{
			BOOL flash = S32(mHealthTimer->getElapsedSeconds() * ICON_FLASH_FREQUENCY) & 1;
			childSetVisible("health", flash);
		}
		mTextHealth->setVisible(TRUE);

		// Health
		childGetRect( "health", buttonRect );
		r.setOriginAndSize( x, y, buttonRect.getWidth(), buttonRect.getHeight());
		childSetRect("health", r);
		x += buttonRect.getWidth();

		const S32 health_width = S32( LLFontGL::getFontSansSerifSmall()->getWidth(std::string("100%")) );
		r.set(x, y+TEXT_HEIGHT - 2, x+health_width, y);
		mTextHealth->setRect(r);
		x += health_width;
	}
	else
	{
		// invisible if region doesn't allow damage
		childSetVisible("health", false);
		mTextHealth->setVisible(FALSE);
	}

	mSGBandwidth->setVisible(net_stats_visible);
	mSGPacketLoss->setVisible(net_stats_visible);
	childSetEnabled("stat_btn", net_stats_visible);

	// update the master volume button state
	bool mute_audio = LLAppViewer::instance()->getMasterSystemAudioMute();
//.........这里部分代码省略.........

	virtual void httpSuccess()
	{
		LLViewerRegion * regionp = LLWorld::getInstance()->getRegionFromHandle(mRegionHandle);
		if (regionp)
		{
			if (LLAvatarRenderInfoAccountant::logRenderInfo())
			{
				LL_INFOS() << "LRI: Result for avatar weights request for region " << regionp->getName() << ":" << LL_ENDL;
			}

			const LLSD& content = getContent();
			if (content.isMap())
			{
				if (content.has(KEY_AGENTS))
				{
					const LLSD & agents = content[KEY_AGENTS];
					if (agents.isMap())
					{
						LLSD::map_const_iterator	report_iter = agents.beginMap();
						while (report_iter != agents.endMap())
						{
							LLUUID target_agent_id = LLUUID(report_iter->first);
							const LLSD & agent_info_map = report_iter->second;
							LLViewerObject* avatarp = gObjectList.findObject(target_agent_id);
							if (avatarp && 
								avatarp->isAvatar() &&
								agent_info_map.isMap())
							{	// Extract the data for this avatar

								if (LLAvatarRenderInfoAccountant::logRenderInfo())
								{
									LL_INFOS() << "LRI:  Agent " << target_agent_id 
										<< ": " << agent_info_map << LL_ENDL;
								}

								if (agent_info_map.has(KEY_WEIGHT))
								{
									((LLVOAvatar *) avatarp)->setReportedVisualComplexity(agent_info_map[KEY_WEIGHT].asInteger());
								}
							}
							report_iter++;
						}
					}
				}	// has "agents"
				else if (content.has(KEY_ERROR))
				{
					const LLSD & error = content[KEY_ERROR];
					LL_WARNS() << "Avatar render info GET error: "
						<< error[KEY_IDENTIFIER]
						<< ": " << error[KEY_MESSAGE] 
						<< " from region " << regionp->getName()
						<< LL_ENDL;
				}
			}
		}
		else
		{
			LL_INFOS() << "Avatar render weight info recieved but region not found for " 
				<< mRegionHandle << LL_ENDL;
		}
	}

// Default constructor
LLFloaterAbout::LLFloaterAbout() 
:	LLFloater(std::string("floater_about"), std::string("FloaterAboutRect"), LLStringUtil::null)
{
	LLUICtrlFactory::getInstance()->buildFloater(this, "floater_about.xml");

	// Support for changing product name.
	std::string title("About ");
	title += LLAppViewer::instance()->getSecondLifeTitle();
	setTitle(title);

	LLViewerTextEditor *support_widget = 
		getChild<LLViewerTextEditor>("support_editor", true);

	LLViewerTextEditor *credits_widget = 
		getChild<LLViewerTextEditor>("credits_editor", true);

	LLViewerTextEditor *licenses_widget =
		getChild<LLViewerTextEditor>("licenses_editor", true);
	
	childSetAction("copy_btn", onAboutClickCopyToClipboard, this);

	if (!support_widget || !credits_widget)
	{
		return;
	}

	// For some reason, adding style doesn't work unless this is true.
	support_widget->setParseHTML(TRUE);

	// Text styles for release notes hyperlinks
	LLStyleSP viewer_link_style(new LLStyle);
	viewer_link_style->setVisible(true);
	viewer_link_style->setFontName(LLStringUtil::null);
	viewer_link_style->setLinkHREF(get_viewer_release_notes_url());
	viewer_link_style->setColor(gSavedSettings.getColor4("HTMLLinkColor"));

	// Version string
	std::string version = std::string(LLAppViewer::instance()->getSecondLifeTitle()
#if defined(_WIN64) || defined(__x86_64__)
		+ " (64 bit)"
#endif
		+ llformat(" %d.%d.%d (%d) %s %s (%s)\n",
		LLVersionInfo::getMajor(), LLVersionInfo::getMinor(), LLVersionInfo::getPatch(), LLVersionInfo::getBuild(),
		__DATE__, __TIME__,
		LLVersionInfo::getChannel().c_str()));
	support_widget->appendColoredText(version, FALSE, FALSE, gColors.getColor("TextFgReadOnlyColor"));
	support_widget->appendStyledText(LLTrans::getString("ReleaseNotes"), false, false, viewer_link_style);

	std::string support;
	support.append("\n\n");
	support.append("Grid: " + gHippoGridManager->getConnectedGrid()->getGridName() + "\n\n");

#if LL_MSVC
    support.append(llformat("Built with MSVC version %d\n\n", _MSC_VER));
#endif

#if LL_CLANG
    support.append(llformat("Built with Clang version %d\n\n", CLANG_VERSION));
#endif

#if LL_INTELC
    support.append(llformat("Built with ICC version %d\n\n", __ICC));
#endif

#if LL_GNUC
    support.append(llformat("Built with GCC version %d\n\n", GCC_VERSION));
#endif

	// Position
	LLViewerRegion* region = gAgent.getRegion();
	if (region)
	{
// [RLVa:KB] - Checked: 2014-02-24 (RLVa-1.4.10)
		if (RlvActions::canShowLocation())
		{
		const LLVector3d &pos = gAgent.getPositionGlobal();
		LLUIString pos_text = getString("you_are_at");
		pos_text.setArg("[POSITION]",
						llformat("%.1f, %.1f, %.1f ", pos.mdV[VX], pos.mdV[VY], pos.mdV[VZ]));
		support.append(pos_text);

		if (const LLViewerRegion* region = gAgent.getRegion())
		{
			const LLVector3d& coords(region->getOriginGlobal());
			std::string region_text = llformat("in %s (%.0f, %.0f) located at ", region->getName().c_str(), coords.mdV[VX]/REGION_WIDTH_METERS, coords.mdV[VY]/REGION_WIDTH_METERS);
			support.append(region_text);

			std::string buffer;
			buffer = region->getHost().getHostName();
			support.append(buffer);
			support.append(" (");
			buffer = region->getHost().getString();
			support.append(buffer);
			support.append(")");
		}
		}
		else
			support.append(RlvStrings::getString(RLV_STRING_HIDDEN_REGION));
// [/RLVa:KN]
//.........这里部分代码省略.........

// static
// Called every frame - send render weight requests to every region
void LLAvatarRenderInfoAccountant::idle()
{
	if (sRenderInfoReportTimer.hasExpired())
	{
		const F32 SECS_BETWEEN_REGION_SCANS   =  5.f;		// Scan the region list every 5 seconds
		const F32 SECS_BETWEEN_REGION_REQUEST = 60.0;		// Update each region every 60 seconds
	
		S32 num_avs = LLCharacter::sInstances.size();

		if (logRenderInfo())
		{
			LL_INFOS() << "LRI: Scanning all regions and checking for render info updates"
				<< LL_ENDL;
		}

		// Check all regions and see if it's time to fetch/send data
		for (LLWorld::region_list_t::const_iterator iter = LLWorld::getInstance()->getRegionList().begin();
				iter != LLWorld::getInstance()->getRegionList().end(); ++iter)
		{
			LLViewerRegion* regionp = *iter;
			if (regionp &&
				regionp->isAlive() &&
				regionp->capabilitiesReceived() &&						// Region has capability URLs available
				regionp->getRenderInfoRequestTimer().hasExpired())		// Time to make request
			{
				sendRenderInfoToRegion(regionp);
				getRenderInfoFromRegion(regionp);

				// Reset this regions timer, moving to longer intervals if there are lots of avatars around
				regionp->getRenderInfoRequestTimer().resetWithExpiry(SECS_BETWEEN_REGION_REQUEST + (2.f * num_avs));
			}
		}

		// We scanned all the regions, reset the request timer.
		sRenderInfoReportTimer.resetWithExpiry(SECS_BETWEEN_REGION_SCANS);
	}

	/* Singu TODO: RenderAutoMuteFunctions
	static LLCachedControl<U32> render_auto_mute_functions(gSavedSettings, "RenderAutoMuteFunctions", 0);
	static U32 prev_render_auto_mute_functions = (U32) -1;
	if (prev_render_auto_mute_functions != render_auto_mute_functions)
	{
		prev_render_auto_mute_functions = render_auto_mute_functions;

		// Adjust menus
		BOOL show_items = (BOOL)(render_auto_mute_functions & 0x04);
		gMenuAvatarOther->setItemVisible( std::string("Normal"), show_items);
		gMenuAvatarOther->setItemVisible( std::string("Always use impostor"), show_items);
		gMenuAvatarOther->setItemVisible( std::string("Never use impostor"), show_items);
		gMenuAvatarOther->setItemVisible( std::string("Impostor seperator"), show_items);
		
		gMenuAttachmentOther->setItemVisible( std::string("Normal"), show_items);
		gMenuAttachmentOther->setItemVisible( std::string("Always use impostor"), show_items);
		gMenuAttachmentOther->setItemVisible( std::string("Never use impostor"), show_items);
		gMenuAttachmentOther->setItemVisible( std::string("Impostor seperator"), show_items);

		if (!show_items)
		{	// Turning off visual muting
			for (std::vector<LLCharacter*>::iterator iter = LLCharacter::sInstances.begin();
					iter != LLCharacter::sInstances.end(); ++iter)
			{	// Make sure all AVs have the setting cleared
				LLVOAvatar* inst = (LLVOAvatar*) *iter;
				inst->setCachedVisualMute(false);
			}
		}
	}*/
}

//.........这里部分代码省略.........
					{
						line.append(LLTrans::getString("TooltipFreeToCopy"));
						suppressObjectHoverDisplay = FALSE;		//  Show tip
					}
					else if (for_sale)
					{
						LLStringUtil::format_map_t args;
						args["[AMOUNT]"] = llformat("%d", nodep->mSaleInfo.getSalePrice());
						line.append(LLTrans::getString("TooltipForSaleL$", args));
						suppressObjectHoverDisplay = FALSE;		//  Show tip
					}
					else
					{
						// Nothing if not for sale
						// line.append("Not for sale");
					}
				}
				else
				{
					LLStringUtil::format_map_t args;
					args["[MESSAGE]"] = LLTrans::getString("RetrievingData");
					line.append(LLTrans::getString("TooltipForSaleMsg", args));
				}
				mText.push_back(line);
			}
			line.clear();
			S32 prim_count = LLSelectMgr::getInstance()->getHoverObjects()->getObjectCount();
			line.append(llformat("Prims: %d", prim_count));
			mText.push_back(line);

			line.clear();
			line.append("Position: ");

			LLViewerRegion *region = gAgent.getRegion();
			LLVector3 position = region->getPosRegionFromGlobal(hit_object->getPositionGlobal());//regionp->getOriginAgent();
			LLVector3 mypos = region->getPosRegionFromGlobal(gAgent.getPositionGlobal());
			

			LLVector3 delta = position - mypos;
			F32 distance = (F32)delta.magVec();

			line.append(llformat("<%.02f,%.02f,%.02f>",position.mV[0],position.mV[1],position.mV[2]));
			mText.push_back(line);
			line.clear();
			line.append(llformat("Distance: %.02fm",distance));
			mText.push_back(line);
			
			//  If the hover tip shouldn't be shown, delete all the object text
			if (suppressObjectHoverDisplay)
			{
				mText.clear();
			}
		}
	}
	else if ( mHoverLandGlobal != LLVector3d::zero )
	{
		// 
		//  Do not show hover for land unless prefs are set to allow it.
		// 
		
		if (!gSavedSettings.getBOOL("ShowLandHoverTip")) return; 

		// Didn't hit an object, but since we have a land point we
		// must be hovering over land.

		LLParcel* hover_parcel = LLViewerParcelMgr::getInstance()->getHoverParcel();

void LLDrawPoolTerrain::renderFullShader()
{
	// Hack! Get the region that this draw pool is rendering from!
	LLViewerRegion *regionp = mDrawFace[0]->getDrawable()->getVObj()->getRegion();
	LLVLComposition *compp = regionp->getComposition();
	LLViewerTexture *detail_texture0p = compp->mDetailTextures[0];
	LLViewerTexture *detail_texture1p = compp->mDetailTextures[1];
	LLViewerTexture *detail_texture2p = compp->mDetailTextures[2];
	LLViewerTexture *detail_texture3p = compp->mDetailTextures[3];

	LLVector3d region_origin_global = gAgent.getRegion()->getOriginGlobal();
	F32 offset_x = (F32)fmod(region_origin_global.mdV[VX], 1.0/(F64)sDetailScale)*sDetailScale;
	F32 offset_y = (F32)fmod(region_origin_global.mdV[VY], 1.0/(F64)sDetailScale)*sDetailScale;

	LLVector4 tp0, tp1;
	
	tp0.setVec(sDetailScale, 0.0f, 0.0f, offset_x);
	tp1.setVec(0.0f, sDetailScale, 0.0f, offset_y);

	//
	// detail texture 0
	//
	S32 detail0 = sShader->enableTexture(LLViewerShaderMgr::TERRAIN_DETAIL0);
	gGL.getTexUnit(detail0)->bind(detail_texture0p);
	gGL.getTexUnit(0)->activate();

	LLGLSLShader* shader = LLGLSLShader::sCurBoundShaderPtr;
	llassert(shader);
		
	shader->uniform4fv("object_plane_s", 1, tp0.mV);
	shader->uniform4fv("object_plane_t", 1, tp1.mV);

	gGL.matrixMode(LLRender::MM_TEXTURE);
	gGL.loadIdentity();
	gGL.matrixMode(LLRender::MM_MODELVIEW);

	//
	// detail texture 1
	//
	S32 detail1 = sShader->enableTexture(LLViewerShaderMgr::TERRAIN_DETAIL1); 
	gGL.getTexUnit(detail1)->bind(detail_texture1p);
	
	/// ALPHA TEXTURE COORDS 0:
	gGL.getTexUnit(1)->activate();
	gGL.matrixMode(LLRender::MM_TEXTURE);
	gGL.loadIdentity();
	gGL.matrixMode(LLRender::MM_MODELVIEW);
	
	// detail texture 2
	//
	S32 detail2 = sShader->enableTexture(LLViewerShaderMgr::TERRAIN_DETAIL2);
	gGL.getTexUnit(detail2)->bind(detail_texture2p);

	gGL.getTexUnit(2)->activate();
	
	/// ALPHA TEXTURE COORDS 1:
	gGL.matrixMode(LLRender::MM_TEXTURE);
	gGL.loadIdentity();
	gGL.translatef(-2.f, 0.f, 0.f);
	gGL.matrixMode(LLRender::MM_MODELVIEW);

	//
	// detail texture 3
	//
	S32 detail3 = sShader->enableTexture(LLViewerShaderMgr::TERRAIN_DETAIL3);
	gGL.getTexUnit(detail3)->bind(detail_texture3p);
	
	/// ALPHA TEXTURE COORDS 2:
	gGL.getTexUnit(3)->activate();
	gGL.matrixMode(LLRender::MM_TEXTURE);
	gGL.loadIdentity();
	gGL.translatef(-1.f, 0.f, 0.f);
	gGL.matrixMode(LLRender::MM_MODELVIEW);

	//
	// Alpha Ramp 
	//
	S32 alpha_ramp = sShader->enableTexture(LLViewerShaderMgr::TERRAIN_ALPHARAMP);
	gGL.getTexUnit(alpha_ramp)->bind(m2DAlphaRampImagep);
		
	// GL_BLEND disabled by default
	drawLoop();

	// Disable multitexture
	sShader->disableTexture(LLViewerShaderMgr::TERRAIN_ALPHARAMP);
	sShader->disableTexture(LLViewerShaderMgr::TERRAIN_DETAIL0);
	sShader->disableTexture(LLViewerShaderMgr::TERRAIN_DETAIL1);
	sShader->disableTexture(LLViewerShaderMgr::TERRAIN_DETAIL2);
	sShader->disableTexture(LLViewerShaderMgr::TERRAIN_DETAIL3);

	gGL.getTexUnit(alpha_ramp)->unbind(LLTexUnit::TT_TEXTURE);
	gGL.getTexUnit(4)->disable();
	gGL.getTexUnit(4)->activate();
	
	gGL.getTexUnit(detail3)->unbind(LLTexUnit::TT_TEXTURE);
	gGL.getTexUnit(3)->disable();
	gGL.getTexUnit(3)->activate();
	
	gGL.matrixMode(LLRender::MM_TEXTURE);
	gGL.loadIdentity();
//.........这里部分代码省略.........

F32 LLViewerRegion::getCompositionXY(const S32 x, const S32 y) const
{
	if (x >= 256)
	{
		if (y >= 256)
		{
			LLVector3d center = getCenterGlobal() + LLVector3d(256.f, 256.f, 0.f);
			LLViewerRegion *regionp = LLWorld::getInstance()->getRegionFromPosGlobal(center);
			if (regionp)
			{
				// OK, we need to do some hackery here - different simulators no longer use
				// the same composition values, necessarily.
				// If we're attempting to blend, then we want to make the fractional part of
				// this region match the fractional of the adjacent.  For now, just minimize
				// the delta.
				F32 our_comp = getComposition()->getValueScaled(255, 255);
				F32 adj_comp = regionp->getComposition()->getValueScaled(x - 256.f, y - 256.f);
				while (llabs(our_comp - adj_comp) >= 1.f)
				{
					if (our_comp > adj_comp)
					{
						adj_comp += 1.f;
					}
					else
					{
						adj_comp -= 1.f;
					}
				}
				return adj_comp;
			}
		}
		else
		{
			LLVector3d center = getCenterGlobal() + LLVector3d(256.f, 0, 0.f);
			LLViewerRegion *regionp = LLWorld::getInstance()->getRegionFromPosGlobal(center);
			if (regionp)
			{
				// OK, we need to do some hackery here - different simulators no longer use
				// the same composition values, necessarily.
				// If we're attempting to blend, then we want to make the fractional part of
				// this region match the fractional of the adjacent.  For now, just minimize
				// the delta.
				F32 our_comp = getComposition()->getValueScaled(255.f, (F32)y);
				F32 adj_comp = regionp->getComposition()->getValueScaled(x - 256.f, (F32)y);
				while (llabs(our_comp - adj_comp) >= 1.f)
				{
					if (our_comp > adj_comp)
					{
						adj_comp += 1.f;
					}
					else
					{
						adj_comp -= 1.f;
					}
				}
				return adj_comp;
			}
		}
	}
	else if (y >= 256)
	{
		LLVector3d center = getCenterGlobal() + LLVector3d(0.f, 256.f, 0.f);
		LLViewerRegion *regionp = LLWorld::getInstance()->getRegionFromPosGlobal(center);
		if (regionp)
		{
			// OK, we need to do some hackery here - different simulators no longer use
			// the same composition values, necessarily.
			// If we're attempting to blend, then we want to make the fractional part of
			// this region match the fractional of the adjacent.  For now, just minimize
			// the delta.
			F32 our_comp = getComposition()->getValueScaled((F32)x, 255.f);
			F32 adj_comp = regionp->getComposition()->getValueScaled((F32)x, y - 256.f);
			while (llabs(our_comp - adj_comp) >= 1.f)
			{
				if (our_comp > adj_comp)
				{
					adj_comp += 1.f;
				}
				else
				{
					adj_comp -= 1.f;
				}
			}
			return adj_comp;
		}
	}

	return getComposition()->getValueScaled((F32)x, (F32)y);
}