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  Problem with line stippling  (Read 1339 times)
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Offline girvine

Junior Devvie




Java games rock!


« Posted 2004-06-28 04:04:46 »

I'm having a strange issue with line stippling.

I can successful enable line stippling (glEnable(GL_LINE_STIPPLE), then set a glLineStipple(5, 0x5555) which correctly stipples my line(s).
However, when I then do a glDisable(GL_LINE_STIPPLE), it seems to have no effect, and any subsequent lines are stippled also.

I did a quick test, and it seems that if I do:
glEnable(GL_LINE_STIPPLE)
glLineStipple(....)
glDisable(GL_LINE_STIPPLE)
glBegin
....vertex..
glEnd

I, as expected, get no stippling at all b/c the stippling is disabled prior to the glBegin/End.

However, if i move the glDisable to AFTER the glEnd, I correctly get stippling, but the disable has no effect.


Also, if I don't do the glEnable() I get no stippling as expected.

However, in a JUnit test, I create a canvas using the canvas factory.  I then test glIsEnabled on GL_LINE_STIPPLE, which initially is false, then call glEnable(GL_LINE_STIPPLE) but the value is still false on a subsequent call to glIsEnabled().  Quite strange.

Is there something stupid I've missed?

Greg.
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