Re: Implementing Browsers

Bernie Roehl ([email protected])
Mon, 5 Jun 1995 11:48:08 -0400


According to Syndesis Corporation:
> No, 3D Studio uses only triangles, even in release 4. However,
> they do use the trick of having a flag for each edge of a triangle
> that sets whether that edge is drawn in the user interface or not.

So any models created by 3D Studio will effectively have only triangles,
which I suspect is the case for most modeling packages.

> When my company's InterChange file format translator creates
> a 3D Studio file from a model in another format that supports
> polygons, we set the edge visibility flags so that you see the
> same "polygon" edges as the original object.

Quick question: How does InterChange handle conversion from a format
which supports non-convex polygons to one which only supports convex
ones? Say from Open Inventor to 3D Studio? Do you decompose them?

-- 
   Bernie Roehl
   University of Waterloo Dept of Electrical and Computer Engineering
   Mail: [email protected]    Voice:  (519) 888-4567 x 2607 [work]
   URL: http://sunee.uwaterloo.ca/~broehl