Miles Bader <miles.bader@[EMAIL PROTECTED]
> writes:
> R
> /
> ---+ +----------4-+ +---
> | | I / | |
> +-------+--------3---+--------+
> \ | / | /
> | +------2-----+ |
> | / |
> | W/ |
> \ / /
> +--------1----------------+
> /
> G .
> .
> -------0-----------------------
Hmm now that I think about it, the problem with that this is that it
gives different depending on what direction you come from...
Maybe if each material had a priority associated with it, and it would
essentially ignore "enter" transitions for puproses of setting the
current IOR, when entering a material with a priority less than the
current priority. So in this example you'd give the ice-cube higher
priority than the water. If you think about a ray going the opposite
direction from the previous example, any transition from I->W without
exiting the I first would act like it was still in the I; then when I
was eventually exited, W would be the innermost active medium, and so
_then_ would become current.
-Miles
--
..Numeric stability is probably not all that im****tant when you're
guessing.
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