rantingrick <rantingr...@gmail.com> wrote:
>
>WHY did i need do this you may ask?
>I am creating geometry with OpenGL. When you create a face you must
>specify a winding order (clockwise or counter clockwise) this winding
>order controls which side of the face will be visible (since only one
>side of a face is rendered). So to create a two sided face you must
>create two faces that share the exact same points, BUT have opposite
>windings, hence the need to create a face with a "backface" attribute
>that contains the mirrored face instance. So now i can move the
>frontface around and i have a handy reference to the backface so i can
>make it follow!
Surely it would be better to use inheritance for this. Create a class
RawFace that encapsulated the points, then have a derived class Face that
creates a second RawFace for the backface. No recursion problems with
that.
As it is, you have a somewhat confusing situation. If I do this:
x = Face( points )
Now I can refer to x.backface, but there is no x.backface.backface.
--
Tim Roberts, t...@probo.com
Providenza & Boekelheide, Inc.
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