hi guys, i would like to draw a double sized quads with alpha component.
My problem is that my quad is just transparent in one side 
i do:
glEnable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glDepthFunc(GL_LESS);
glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
glBegin(GL_QUADS);
glColor4f(0.5f, 0.5f, 0.5f, 0.5f);
glVertex3fv(First);
glVertex3fv(Second);
glVertex3fv(Third);
glVertex3fv(Fourth);
glEnd();
I thought that if i used the front and back polygonmode, it should work ???
Thanks for u’r help
Try setting glDepthMask to false, before you draw your quad.
After you have drawn the quad, you can set it back to true again.
I think this works, but I’m not sure.
Edo
I have tried but it doesn’t work too …
I tried glDephtMask(0) before the code i sent and glDephtMask(1) after…
Any other suggestion ?
system
5
where is the alpha func defined …
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
?
Well, if its just invisible from one side, try to
glDisable( GL_CULL_FACE );
or something in that why. Perhaps that will help you out.
jc1
7
I think u must use two quads, because one quad has one normal and when u light a scene, it’s with normals…