In article <3A925B1C.CD85ADFE@gmx.de>, Christoph Hormann 
<chr### [at] gmxde> wrote:

> Yes, although a version calculating the dot product with another vector
> could also be interesting.

Too bad this stuff can't (yet) be done with function patterns...if the 
available information was expanded from just xyz coordinates to include 
surface normal and ray direction, you could do most of this stuff as a 
function. Maybe someone will write that patch after POV 3.5 is released.


> A pattern giving the slope of an object just like the slope pattern 
> right now, but that can be applied to any other object too.  The 
> value would be constant in direction of the slope vector. 

If the point being evaluated isn't on the object, how does it get the 
normal? Does it search for the nearest point on the object?


> It would also be possible to use 'eval_pattern' on this.  

It should also work for media density.

-- 
Christopher James Huff
Personal: chr### [at] maccom, http://homepage.mac.com/chrishuff/
TAG: chr### [at] tagpovrayorg, http://tag.povray.org/

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