Georg Olesen wrote:
> I'm trying to get a laserbeam to work. I've used the following code for the
> laser
> #declare LaserPosition = <2,1.5,1>;
> #declare LaserTarget=<0,1.5,20>;
> #declare LaserSize=<0.5,0.5,0.5>;
> light_source {LaserPosition
>               color Green
>               cylinder radius .1
>               falloff 0
>               point_at LaserTarget
>               looks_like { box {LaserPosition-LaserSize,
> LaserPosition+LaserSize color Black}}
> (There's also an additional white light source)
> 
> I want to shine the laser on the side of a silver colored box, see the spot
> where it hits this box, reflect the beam onto the side of another silver
> colored box, and see the spot where it hits this box. Also I would like to
> be able to see a trace of the beam as it propagates through the "air".
> 
> How do I do this??
> 
> Hope you guys can help me
> In advance thanx
> kind regards
> Georg
>               }
> 
> 
> 
Some more experienced huys will correct if I'm mistaken, but :
You can use a transparent cylinder with interior media (see the examples 
in pov, or some scenes at IRTC : I used grdesert recently for a similar 
need).
Be aware that objects do not reflect *light* (you cannot light something 
by using a mirror), they reflect their environment. If the light must 
follow a reflected path, you'll have to make as many media cylinders as 
segments in the path of the light.

Regis.

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