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Subject: 
Re: LDGLite outputting gobble-dee-goo to terminal window
Newsgroups: 
lugnet.cad.dev.mac
Date: 
Mon, 28 Jul 2003 15:09:02 GMT
Viewed: 
1943 times
  
In lugnet.cad.dev.mac, Don Heyse wrote:
Oops... before I get to excited, moving a piece creates some bitchin'
trail lines :) that go away when the view is changed.

http://users.rcn.com/cjmasi/trail_lines.png

I think I may have found the cause of this one.

  http://www.geocrawler.com/archives/3/704/2000/9/0/4312491/

This guy found the same bug on his Mac.  Writing to the GL_FRONT
buffer seems to also write over whatever you may have stashed away
in the GL_BACK buffer.

Found a much more recent post on this indicating that it may still be
a problem with current Macs...  Also contains a bit more info as to
what's really going on.

  http://www.blender.org/pipermail/bf-committers/2003-June/003382.html

The only workaround I can think of is to
copy the image to regular system memory, or redraw the whole model
every time you move a part.  Copying an an opengl image buffer to
system memory is typically quite slow.  How slow are the full
model redraws when you change the view?



Don



Message is in Reply To:
  Re: LDGLite outputting gobble-dee-goo to terminal window
 
(...) (URL) guy found the same bug on his Mac. Writing to the GL_FRONT buffer seems to also write over whatever you may have stashed away in the GL_BACK buffer. The only workaround I can think of is to copy the image to regular system memory, or (...) (21 years ago, 28-Jul-03, to lugnet.cad.dev.mac)

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