Subject:
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Re: LDGLite outputting gobble-dee-goo to terminal window
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Newsgroups:
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lugnet.cad.dev.mac
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Date:
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Wed, 6 Aug 2003 13:47:22 GMT
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Viewed:
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4979 times
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In lugnet.cad.dev.mac, Christopher Masi wrote:
> "Don Heyse" <dheyse@hotmail.spam.go.away.com> 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. 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?
>
> Less that a second for my Mini, but it is mini :) About 4 seaconds for
> my black tank car, which has 284 (?) parts. About 8 seconds to draw my
> GP30. The dat for the GP30 has 817 lines (not all of them are parts).
> Redraw the model every time... that would mean a eight second wait for
> every move of the brick, right? I think that would be a bad idea. The
> intro level Macs aren't that much faster than mine.
> How bad a hit is system memory? Do the new fancy Macs have the smae
> trail line problem?
> My feeling is... as long as you are having fun tracking down bugs,
> track away, but if it it is driving you crazy, and you are only fixing
> it for us old timers (though there are always more Mac old timers than
> there are in other OS's) a big "don't do this, but this works fine"
> section in the read me would be more than adequate.
Ok, I might've fixed all of this. If not, I'll have to make a 1.1
release real soon because I couldn't wait any longer. Ldglite has
finally reached 1.0. Give the OS X executable a spin and see what
I missed.
http://ldglite.sourceforge.net/
By the way, Tom Bozzo sent me a really nice screenshot of your GP30
and said you approved it's use on the ldglite web page. I hope that's
all right.
Don
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