I need a clarification with GL_LINE_SMOOTH.
- I draw a line (linewidth 5) with activated GL_LINE_SMOOTH to the depth buffer.
- Then I draw that line again (linewidth 10) with deactivated GL_LINE_SMOOTH to the color buffer with activated depth test(GL_LEQUAL).
-What I get in the color buffer is the line but with holes where parts of the line with linewidth 5 were rendered to the depth buffer.
-If I don’t use GL_LINE_SMOOTH at all, everything works as expected.
-If I use GL_GEQUAL for the depth test I see exactly the inverse parts of the line.
-I therefore suspect that the GL_LINE_SMOOTH option affects the depth values so that when I draw the wider line the depth test fails for some portions of the line.
Can anybody say something to this observation?
I know that linewidth > 1 are deprecated but it still should work in my opinion.
Nvidia Quadro K2000 driver version 369.49
Windows7 64 bit Professional