[Development] Blacklines only in OpenGL in a QGLView

[James Turner]

On 21 Aug 2013, at 13:11, niallcwhelan at eircom.net 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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