Questions about rendering invisible objects

[Flux]

How do you render a straight line with nurbs?
Do you need nurbs for lines?
With OpenGL how do you normally render a line?(no color, no effects,no textures)
How do you render a dot(no color) with lines coming out of it without using polygons?
Is it possible to generate a single pixel sprite?
Is it possible to map Nurbs with displacement maps?

[Davros]

if something has no colour its invisible - do you need to render it at all ?

[Graham]

er...

glBegin(GL_LINES);

?


As for nurbs, are you talking about glu nerbs? (whcih are older than time itself, times infinity).