Subject:
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Re: Line Thickness and Antialiasing in LdGLite 0.7.3
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Newsgroups:
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lugnet.cad, lugnet.cad.dev
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Date:
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Sat, 30 Dec 2000 22:25:33 GMT
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Viewed:
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613 times
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In lugnet.cad, Fredrik Glöckner writes:
> I've tested LdGLite 0.7.3 on Linux, and the line width option worked
> fine! Thanks!
>
> While rendering a model with steps, I noticed that the whole image is
> rerendered at each step. Is this normal? I don't remember right now if
> the same thing happened with the previous version of LdGLite.
Yeah, it's been that way for a while. Perhaps forever. I've fiddled
with various ways to fix it, but haven't yet come up with anything
that made me happy. You can see the remnants of one such attempt
inside the #ifdef IGNORE_DIRTY sections of main.c and stub.c. I
think I couldn't tell if the redraw was because the window got dirty
or because the user clicked to see the next step.
Add -DIGNORE_DIRTY to the CFLAGS line in the make file and recompile to
see what I mean. The first thing you'll notice is that I don't handle
the "step N of N" prompt all that well. Then if you partially cover
and then expose the window you'll see my main problem. I also have
a problem with the spin mode.
More proof of my laziness, I found something that sorta works and used
it rather than digging really deep into the parsing code and working out
a better solution. However since this is my first real feedback in quite
a while I'll consider it a priority. A little reading in the green OpenGl
book turns up the function glutLayerGet(GLUT_NORMAL_DAMAGED) which seems
to be just what I was looking for. I've got it just about working now so
this should be fixed in the next release...
Have fun,
Don
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