Rune wrote:
> 
> [...]
> 
> The new algorithm works the same way except that if the algorithm loop is
> run more than once, then for each loop the ray is traced not from the
> OldLocation but from the collision point from the loop before. That works
> fairly well, but not perfect.
> 
> Perhaps one reason for the occasional errors could be that a ray
> accidentally hits exactly between two triangles of the heightfield?

I must admit that your method seems rather strange, but without knowing
the 'surrounding' parts of the algorithm, i can't say much.  Maybe try
moving upwards rather than in direction of the normal vector, this should
be save for heightfields.  Furthermore an additional 'trace()' from
'OldLocation' to 'OldLocation_rotated' could avoid this "getting below the
surface"

Christoph

-- 
Christoph Hormann <chr### [at] gmxde>
IsoWood include, radiosity tutorial, TransSkin and other 
things on: http://www.schunter.etc.tu-bs.de/~chris/

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