On 21 Aug 2013, at 13:11, [email protected] wrote: > Regardless of values is glColor3f, black is the only line colour drawn. > > Suggestions gratefully received.
Do you have lighting enabled? If so you probably want to disable it while drawing the lines, and then re-enable it. Or you can lookup glColorMaterial. Other possibilities (less likely) are a strange blending mode, but I'd start with the lighting. Regards, James
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