Research into efficient rendering of large data sets

1
Three-Dimensional Videoconferencing Part IV

• Research into efficient rendering of large data
  sets
• By Daniel Tenedorio
• August 15, 2008

2
COVISE Plugin

• Once I had refined the algorithm, it was time to
  implement it in a COVISE plugin so different
  research departments could use it.
• The coding took a few days, and then it was done!
  I was able to get the plugin running without
  problems.
• The rendering performance under COVISE was
  slightly worse than in a simple OpenGL window,
  probably due to the extra overhead for polling
  for menu input, etc.
• This is okay resampling the point cloud to draw
  fewer points makes even more sense if the
  systems GPU cannot perform as well.

3
Streaming!

• I had recently started to collaborate with Rachel
  Chu in the University of Osaka, Japan, as she was
  finishing installing their CAVE.
• I started to investigate UNIX network
  programming. I settled on Berkeley UNIX network
  socket-based TCP and added streaming
  functionality to the plugin.
• The destination IP and connection port reside in
  the XML configuration file. Streaming
  automatically begins once the user loads any
  Stanford PLY model.
• Rachel and I spent about a week trying to get
  streaming to work. Finally, I was able to send
  the 35,947 point Stanford bunny to her at about
  30fps!

4
Putting It All Together

• Finally, we have flexible software that
• Is cleanly written in easily extendible C
• Can load 3D point model data from a variety of
  formats (QSPLAT, Stanford PLY, and C3D for now)
  into memory, and send it to another machine
• Can receive streamed point clouds and render them
  within any time constraints (user sets min. frame
  rate)
• Runs in multiple display environments, from a
  single computer to a tiled display wall to a CAVE
  (because of COVISE)

5
Paper

• Rachel and I are currently co-writing a research
  paper about stereoscopic three-dimensional
  videoconferencing.
• The paper will be submitted to the PRAGMA
  Workshop on e-Science Highlights in 2008.

6
Cultural Experiences

• We spent the third week of August in Kenting, a
  beach town in the southern tip of Taiwan.
• While there is only one night market on one
  street in Kenting, there are many beaches to
  explore and tasty fish to eat.

7
(No Transcript)
8
(No Transcript)
9
(No Transcript)