1 / 14

Distributed VR Architectures

Distributed VR Architectures. 2003. 12. 5 임형준. index. Multipipeline Synchronization graphics and haptics pipelines synchronization Colocated Rendering Pipelines multipipe graphics cards PC clusters Distributed Virtual Environments network types topologies.

PamelaLan
Télécharger la présentation

Distributed VR Architectures

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Distributed VR Architectures 2003. 12. 5 임형준

  2. index • Multipipeline Synchronization • graphics and haptics pipelines synchronization • Colocated Rendering Pipelines • multipipe graphics cards • PC clusters • Distributed Virtual Environments • network types • topologies

  3. 1. Multipipeline Synchronization • Distributed VR engine • use two or more rendering pipelines • pipelines perform graphics or haptics computations • on a single compute or multiple computers • Different synchronization approach • software • frame buffer • video

  4. 1. Multipipeline Synchronization • Need external signal : genlock

  5. 1. Multipipeline Synchronization • Synchronization between two heterogeneous pipelines : graphics and haptics • Force computation • on the host computer • on the embedded processor in haptic interface controller • Different output rates • haptics rendering is much faster than graphics rendering

  6. 2. Colocated Rendering Pipelines • Multipipe graphics cards • Multiple single-pipe graphics cards • in a single PC • sharing CPU, main memory, and bus bandwidth • cheaper alternative to the master-slave model • Single multipipe graphics cards • cheaper than using single-pipe graphics cards • Wildcat II 5110 : • synchronization without genlock • “parascale” (parallel and scalable)

  7. 2. Colocated Rendering Pipelines • Wildcat architecture

  8. 2. Colocated Rendering Pipelines • Problem in single PC system • not proper for large number of displays • resolution goes down • Solution • large, multipipeline workstations • Better choice : PC cluster • synchronization by a control server • the more PCs, the slower refresh rate

  9. 2. Colocated Rendering Pipelines • Example : Chromium system • WireGL • runs on control server • communicates with rendering servers (PCs) • forks OpenGL commands to the corresponding PC

  10. 3. Distributed Virtual Environments • A virtual environment which resides on two or more networked computers • Collaborative distributed VE • take turns performing a task • only one user interacts with an object at a time • Cooperative distributed VE • users interact with an object simultaneously

  11. 3. Distributed Virtual Environments

  12. 3. Distributed Virtual Environments • Basic communication between two PCs • each PC has an identical copy of virtual environment • transmit any changes • buffering • Network topologies • server-client model • peer-to-peer model

  13. server client2 client3 client1 3. Distributed Virtual Environments • Server-client model • single server • multiple servers

  14. client2 client3 client1 client4 client5 client3 client5 client4 client1 client2 LAN 3. Distributed Virtual Environments • Peer-to-peer model

More Related