[Johannes]

dear farshizzo,

You wrote:
>The viz.screentoworld command >returns a 3d vector in world >coordinates that points into the >screen from the given 2d screen >coordinates.

I still don't understand where it get's the start-point from (the first three numbers)? Howdoes vizard determine how far to point into the screen? Why does this begin-point not start at the origin of the 3d universe?

The mouse is simply selecting any point on the screen!

The program below works, just wanted to understand, where screentoworld get's its startvalue from and second if there is an easier way to get the point where the mouse is pressed (in 3d coordinates e.g. [3,3,3]) - so I could simplify it.

Best, Johannes