"Sven Littkowski" <sve### [at] jamaica-focuscom> schreef in bericht 
news:45558490@news.povray.org...
>
> I intent to place some objects (called "Licht") in a circle. Since the 
> underground is a height_field, I want to use Trace to get the proper Y 
> coordinate of the current location. There I fail. I don't know exactly, 
> how to properly define the location for Trace. Please see above. of 
> course, that returns an error message. How to do it better?
>

I think you should determine first the new location by using: 
vtransform(Vect, Trans)
in transform.inc, and then apply that to the trace().

Thomas

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