Flip normals?

Hi everyone.
I want to place a camera inside a big skydome. How can I draw this skydome? I suppose I have to draw it (using simple sphere function) and “flipping” normals.
How can I do this flip?


Originally posted by vofka:

How can I do this flip?

It’s easy: you just negate all the coordinates of your normal vector.



But what if I use function such as glutSolidSphere() to draw my skydome?

Why dont you use gluSphere , gluQuadricNormals and gluQuadricOrientation functions.
With gluQuadricOrientation you can change where your normals are pointing.
Hope this helps.