in order to better understand the present invention and the advantages that it produces , it is useful to provide descriptions of some of the vu concepts and terms that are encountered . the list below is exemplary and is not intended to be all inclusive . ( 1 ) an avatar is a graphical representation a user selects that other users can see , often taking the form of a cartoon - like human but with increasing desire to render the depiction in more realistic fashion . ( 2 ) an agent is the user &# 39 ; s account , upon which the user can build an avatar , and which is tied to the inventory of assets a user owns . ( 3 ) a region is a virtual area of land within the vu . ( 4 ) assets , avatars , the environment , and anything visual consists of uuids ( unique identifiers ) tied to geometric data ( distributed to users as textual coordinates ), textures ( distributed to users as graphics files such as jpeg2000 files ), and effects data ( rendered by the user &# 39 ; s client according to the user &# 39 ; s preferences and user &# 39 ; s device capabilities ). note too that , throughout this disclosure , for clarity of presentation only , reference is made to an individual or avatar , which is a digital representative of the individual . however , it should be noted that this term not only applies to an individual , but to any computerized processes that may execute on behalf of the individual , using the same credentials and capabilities of the individual that owns / controls the process . in general , this embodies many forms , such as prescheduled , automatically running maintenance processes , system level processes ( owned by the system administrator ), etc . in all cases , this process is treated like an avatar , with the same inputs and outputs , regardless of whether the credentials come directly from an individual or from a computerized process acting in his or her stead . fig1 illustrates the basic structure of the present invention . in particular , server 100 is seen as providing support for virtual environment 130 which for practical limitations illustrates the presence of three avatars , one of which represents the current user owner . for purposes of understanding the present invention , it is best to consider the center figure as representing the user &# 39 ; s avatar . the other figures will have their own uuid &# 39 ; s , contexts and levels ( not shown for reasons of clarity ). server 100 provides virtual environment 130 within virtual address space 110 which is allocated to the subject user . the subject user 105 acts through agent 112 . agent 112 has access to inventory database 114 which , among other things , includes a list of objects and properties for those objects owned by the user within the virtual environment . address space 110 is associated with the subject user through avatar uuid 116 . address space 110 also includes avatar renderer 120 . in accordance with the present invention , it is noted that avatar renderer 120 is not only provided with avatar uuid 116 , but also with context and level information , 118 and 122 respectively , as described more particularly below . as indicated above , there are two aspects of the present invention : avatar rendering and computational load reduction . the first of these components to be considered is avatar rendering . furthermore , two distinct methods of determining avatar rendering importance are described : manual and automated . both of these methods enable the client to reduce its computational load when rendering virtual universe regions . often , interactions between users within a vu are restricted to a small number of users . for example , avatar a is attending a virtual concert with avatar b . both avatar a and b are friends . avatar c is also attending the virtual concert . however , avatar c is not interested in what clothing avatar a and b are wearing , but only interested in his own friend , avatar d as well as the concert band . while the clothing of avatar a and b are not of interest to avatar c , in current art , the vu client renders all interactions which thus increases the computational load placed on the vu client . in current art , methods do not exist for the convenient and selective reduction of computational load by modifying the rendering characteristics of avatars within a virtual universe . nor do ( manual or automatic ) methods exist to select which avatar &# 39 ; s rendering characteristics to modify . previously unknown methods for the rendering or ranking of avatars include : avatar interaction based rankings , inventory similarity based rankings , detection of in progress business interactions and company hierarchy based rankings . in the manual embodiment , a user is responsible for designating the relative rendering ranking of avatars . a modification to a virtual universe client allows residents of that universe to denote other avatars &# 39 ; rendering importance . it is known for users of a virtual universe to be able to select objects within that universe . this is commonly done with an input device such as a mouse or a keyboard . also known is for an input combination to display to the user a “ context ” menu for said selected object . the “ context ” menu commonly displays actions appropriate for the selected item . the present invention modifies the “ context ” menu of a virtual universe user interface adding an action to allow a ranking of rendering importance for each avatar . those skilled in the art will note that many possible variations and combinations exist to select an object and to request an action be performed upon the object . additionally , the selection of avatars and subsequent selection of rendering importance is applied simultaneously across multiple avatars within a visible region . embodiments of the present invention may differ in the number of distinct rendering importance levels or rankings . exemplified herein is a sample embodiment that contains three levels . level one denotes avatars to always render ( and usually with high quality ), level two consists of “ normal avatars ,” and level three denotes “ extraneous ” avatars . the rendering ranking for each avatar is stored as metadata associated with the avatar uuid and is made to persist in a non - volatile database . on the other hand , the selections may be ephemeral , resetting over time or upon user log - off . in another embodiment , the user may choose an avatar &# 39 ; s rendering ranking using the uuids of the avatars without the use of a graphical interface . in the automatic embodiment , the client software is responsible for designating the rendering importance of avatars , with little or no user guidance . as in the manual method described above , distinct rendering importance levels exist for avatars within the virtual universe . it should be noted , that while it is impractical for the manual method to make use of a large number of levels , the automated methods provides more fine - grained rendering levels , or rankings , of other avatars within the vu . ranking methods : the following ranking methods are exemplary in nature and many other potential ranking methods are possible without deviating from the scope of the present invention . the ranking methods are usable in combination with each other and each type of ranking may have greater or lesser influence on the ranking , depending on the embodiment . avatar interactions : if two or more avatars are involved in a chat session , the avatars involved in the chat session may be assigned a higher rendering ranking when compared with other avatars . additionally , other interactions such as waving or handing a virtual document to another avatar should result in those avatars having a higher rendering ranking . interaction ranking may also contain a temporal component , such that , recent interactions are ranked higher than previous interactions . inventory similarities : if avatars have overlapping inventory items , there is a potential for those avatars to be interested in each other and therefore should have a higher rendering ranking than those who contain divergent inventory items . the percentage of overlap may be a factor in determining rendering ranking based on inventory similarity . for example , those with a 75 % overlapping inventory should be ranked higher than those with a 12 % overlapping inventory . business transaction detection : if it is determined that an avatar is involved in a business transaction with another avatar , those avatars should receive a higher rendering ranking than other avatars . business transaction detection is achievable through parsing chat text , location within a vu ( a region zoned for business ), or engagement of an intra - vu fund transaction . transaction ranking may also contain a temporal component , such that recent interactions are ranked higher than less recent interactions . it is also noted that the present model and process provides the ability to prevent select advertisements from having their rendering quality overridden , such as those supplied from platinum or gold level sponsors . such ads may , for example , appear on billboards within the vu . company hierarchy : some embodiments may have access to a company directory which contains the company hierarchy . in such embodiments , those within a user &# 39 ; s management chain and within his group , department , line of business , or unit should be given a higher ranking than other avatars within the company . it should be noted that the above methods , manual and automated , might be used independently or in conjunction with each other . this component uses the rendering rankings computed by the avatar rendering ranking component to reduce computational load on the client . invocation : several potential methods exist for invoking the computational load reduction component . manual invocation : manual invocation occurs at the request of the user who is typically in control of many aspects of the virtual universe ( vu ) client . for example , the user is using his pc that runs the vu client . the user may choose to engage the system application for any reason , including but not limited to : observation of system slowdown , preference for enhanced performance , the need to be undistracted by unimportant avatars , the need to find important avatars or avatars of interest , etc . system invocation may take many forms known in the art of user interface design . some potential invocations methods include : selecting an icon , activation with a keyboard hot key , selection from a menu , voice instructions , mouse pointing , etc . constant invocation / manual deactivation : some embodiments may enable the load reduction system by default . in such embodiments the system is always engaged . furthermore , a subset of these embodiments may provide the user with a manual deactivation method to disable the system load - based invocation : more complex embodiments may engage the load reduction system by measuring the computational load on the client system . such embodiments periodically poll the client system to obtain metrics describing the current system load . load can include such factors as system memory usage , page faults , graphic memory usage and cpu statistics including run queue length , wait queue length , system queue length , etc . the previous are examples and many substitute metrics may be used without deviating from the core idea of the present invention . note that predicted load and usage may be also be considered . for example , if usage trends indicate that in 15 minutes the vu will be very slow , engagement of the system may take place . upon invocation , steps are taken to reduce the computational load on the client for rendering the virtual universe . several example methods for reducing computational load are described below . polygon / triangle reduction : to reduce computational load on either the cpu ( central processing unit ) or gpu ( graphical processing unit ) the client may reduce the number of polygons required to render an avatar . in 3d rendering , polygons and triangles are the primitive objects which make up complex 3d objects such as avatars . reducing the number of polygons and triangles for an avatar reduces the load on the system during the graphical rendering process called rasterisation . rasterisation is well known in the art of 3d rendering and is the method used by virtually all current gpus to create realistic images . simple calculations may be performed in real time to reduce the number of polygons that are required for each animated frame within a virtual universe . these calculations replace many smaller polygons and triangles with larger such primitives . reducing primitives results in a lower quality and less realistic rendering . it is also possible to use zero polygons and simply render the avatars as line segments . frame rate reduction : a second method to reduce load is to modify the frame rate for rendering individual avatars within a virtual universe . as with movies and television , smooth motion within a virtual universe is an illusion created by rapidly changing static images . another term for these static images is rendered frames . each avatar within each frame takes computational load to render . if the number of times an avatar was rendered per time period was reduced , the computational load would likewise be reduced . in such systems the last previously rendered avatar image would be cached and used for subsequent frames . such a reduction may result in avatars having jerky movement throughout the virtual universe . texture / lighting elision : a third optimization method is the elimination of texturing mapping and lighting calculations for individual avatars within a virtual universe . texture mapping is the process of applying a flat texture stored in image format to a three dimensional shape . texture mapping is a computationally intensive process and eliminating this process reduces load on the client . without textures , the avatars may be rendered in a “ wireframe ” format . other embodiments may display avatars without textures as primitives ( cones , cubes , tubes , etc ) as solid textures . a second optimization that may be used with or without texture elision is to eliminate lighting calculations from avatar rendering . lighting calculations are computationally intensive operations that modify the brightness , shading and other visual characteristics of an object by realistically simulating how light ( directional and omnidirectional ) affects an object . removing lighting ( and the time and resource consuming calculations associated therewith ) results in less realistic avatar representations . the number of lighting sources are reduced or even eliminated as one method for controlling the requirements for controlling avatar rendition . furthermore , while focus herein has been directed to reducing avatar detail , more generally it is directed also to methods for controlling avatar rendition . avatar elision : another optimization method is the elimination of an avatar which would otherwise be rendered within a scene . this method typically saves more computational resources than any previously described method . it should be noted that the above methods are usable independently or in conjunction with each other . the combination of methods to use and the level of reduction within each method is dependent on the rankings provided by the previously described ranking component . it is noted that aggregate ranking information is desirable for use by advertisers . those avatars with a high rendering ranking may be candidates to have advertising information ( logos , teleport invitations , etc ) as part of their avatar rendering . while this disclosure focuses on avatars , the methods and systems of the present inventions are equally applicable to other rendered objects within a virtual universe . in yet another embodiment , the present invention provides a business method that performs the process steps of the invention on a subscription , advertising , and / or fee basis . that is , a service provider , such as a solution integrator , offers to provide both manual and automatic avatar ( or object ) rendering under selective control of the user as to its use and the parameters employed to carry out avatar rendering . in this case , the service provider creates , maintains , supports , etc ., a computer infrastructure that performs the process steps of the invention for one or more customers . in return , the service provider receives payment from the customer ( s ) under a subscription and / or fee agreement and / or the service provider receives payment from the sale of advertising content to one or more third parties . fig2 illustrate the two basic steps employed in the present invention : ( step 201 ) capturing user ranking with respect to at least one avatar ; and ( step 202 ) dynamically rendering at least one avatar in accordance with the captured user ranking . in any event an end user environment in which the present invention operates is shown in fig3 . the present invention operates through a data processing environment which effectively includes one or more of the computer elements shown in fig3 . while fig3 is more suited for illustrating an end user environment , it is noted that a similar , albeit typically much larger , data processing system is connected via the internet to the local environment depicted . in particular , a similar non - volatile memory 540 is typically present at the server end to contain program instructions for carrying out the virtual reality program which are loaded into a corresponding main memory 510 for execution . turning to a local focus , computer 500 includes central processing unit ( cpu ) 520 which accesses programs and data stored within random access memory 510 . memory 510 is typically volatile in nature and accordingly such systems are provided with nonvolatile memory typically in the form of rotatable magnetic memory 540 . while memory 540 is preferably a nonvolatile magnetic device , other media may be employed . cpu 530 communicates with users at consoles such as terminal 550 through input / output unit 530 . terminal 550 is typically one of many , if not thousands , of consoles in communication with computer 500 through one or more i / o unit 530 . in particular , console unit 550 is shown as having included therein device 560 for reading medium of one or more types such as cd - rom 600 shown in fig4 . media 600 , an example of which is shown in fig4 , comprises any convenient device including , but not limited to , magnetic media , optical storage devices and chips such as flash memory devices or so - called thumb drives . disk 600 also represents a more generic distribution medium in the form of electrical signals used to transmit data bits which represent codes for the instructions discussed herein . while such transmitted signals may be ephemeral in nature they still , nonetheless constitute a physical medium carrying the coded instruction bits and are intended for permanent capture at the signal &# 39 ; s destination or destinations . while the invention has been described in detail herein in accordance with certain preferred embodiments thereof , many modifications and changes therein may be effected by those skilled in the art . accordingly , it is intended by the appended claims to cover all such modifications and changes as fall within the true spirit and scope of the invention .
the rendering of avatars in a virtual universe is selectively controlled by the avatar owner . avatar ranking by several criteria , operating either jointly or independently , is employed to control avatar rendering in ways intended to reduce computational loading while not significantly impacting the virtual universe experience .