[Fluxus] 'polygon
Kassen
signal.automatique at gmail.com
Wed Mar 3 07:12:41 PST 2010
>
> Take for instance this shape:
>
> http://www.flickr.com/photos/dave-griffiths/4404021664/
>
> The L faces can't be single polygons as they are concave, so they are
> built out of triangles. The white wireframe are from (hint-wire), the
> black wireframe is a bunch of ribbon primitives.
>
>
These could, I think. As long as you start drawing at either the inner or
outer corner of the "elbow" it should work. Two 'polygons and a 'quad-list
could build this and it should work with a normal wire-frame. That's just
nitpicking but let's be clear as it's all quite confusing enough :-).
The choices we make here are quite interesting. If we'd have a shape like a
flat cake with a single piece missing we could make the top and bottom out
of 'polygon types and wire-frame those, then use a quad list to do the
vertical dimension. Using hint-wire on that would result in either exposing
the low resolution or colouring the whole side black. I suppose that in that
case we'd have to try to use a shader on just that primitive to hopefully
catch the vertical outline as it appears to the camera?
The effect of stacking the ribbons with the hint-wire that you are using
here is quite interesting, BTW. I assume these use a sort of "depth sort"
with the ones drawn last placed "on top"? I got some cute glitter effects by
drawing a thick black ribbon over a thinner white wire. Moving the whole
thing about made single pixel glitches get through to create a nice
sparkling effect. Cheap and cheerful fun.
Yours,
Kas.
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