Draw Line between Points selected by mouse

[farshizzo]

Hi,

The viz.screentoworld command returns a 3d vector in world coordinates that points into the screen from the given 2d screen coordinates. The return value is a list of 6 numbers. The first 3 numbers represent the begin point of the vector and the last 3 numbers represent the end point of the vector.

In your program, is the mouse selecting a specific 3d object, or is it simply selecting any point on the screen?