Difference between revisions of "HanProgressReportAugust08"

Revision as of 14:04, 11 August 2008

UP

Deadline

• Aug/11/2008
  • new class restructuring
• Sep/22/2008
  • deadline

TODO

• multi-volume support

   * mesh generation - generating a mesh for multivolumes under one constraint - memory size
   * rendering - multi-volume rendering
         o new rendering algorithm: need to manage multi bricks overlaps with several bricks! 
   * time-series multivolume rendering - need to handle multi timesteps

• mipmapped video support

   * measuring performance for each step
     - find bottlenecks
   * prefetching next frames (check libc max filedes)
     - frame window: [x-5, x+20]
     - open new frame files
     - close old frame files
   * point of interest (check paper again)
   * limiting # of bricks loaded at each frame
   * prefetching bricks?

10 Sun

• reimplemented covise plugin with the new MipMapVideoLib
• tested on covise
  • 30 fps when cached
  • below 10 fps when first played

09 Sat

• tested with 750 frames
  • 2M pixel screen
  • horrible performance 3~5 fps without caching
  • second run (with cache) achieves around 30~50 frames per second

08 Fri

• debugged the bug
• tested with 200 tornado data frames and it plays interactively
  • nearest neighbor interpolation causes lots of aliasing especially on lines and edges
  • no prefetching or asynchronous I/O was used
  • trying to come up with an algorithm that limits the total number of bricks loaded at each frame
    • heuristic. there can be a smarter algorithm than one in octreemizer..
    • don't know how much this would impact the overall performance
• generating 600 frames

07 Thur

• refine and debug frame window
  • debugging frame window..
  • data isn't changing...

06 Weds

Done

• generated tornado tiff data sets
• implemented frame window - need test!!!!!
  • opening next 10 frames
  • closing previous 10 frames
  • activating/deactivating BrickReaders
• grpof to find bottlenecks
  • no bad calls, which means my system is IO bounded. =(

August/05/2008 (Tu)

• multi-volume support

   * user interface - need to be able to manipulate one volume at a time
   * new class structures? like in virvo/multirend

• dynamic change in volume control UI
  • hide/show according to volume selection

August/01/2008 (Fri)

Done

• finalized the interface between MipMapVideo library and GUI part