[x3d-public] standard ambiguities

[simon place]

thinking about this a bit more;

this problem will also show up with 'varying' values in shaders.

On 27 August 2015 at 16:30, simon place <psiplace at netscape.net> wrote:
> sorry but here's another issue.
>
>
> suppose you texture a square quad (a face in an IFS) from texture
> coordinates that form a 'kite'
> http://en.wikipedia.org/wiki/Kite_(geometry) shape in the texture,
> then does the colour needed for the centre of the square face come
> from the pixel in the texture mid-way between the two wing tips or
> mid-way between the head and the tail?
>
> see discussion on comp.lang.vrml group;
> https://groups.google.com/forum/?fromgroups#!searchin/comp.lang.vrml/ambiguous$20texturing$20of$20non-triangles$3F/comp.lang.vrml/-0LIizFojDY/D3ZjQNnGjnEJ
>
> it has an example and results from various browsers of one way to
> force visibility of the issue.