visualizing mirrors that can be dragged, with light paths.

[Rhombixx]

I am trying to model a system of mirrors with a camera that gets images that have been bounced of many mirrors, and I would like to be able to drag the mirrors around (ie: in a mechanism type mode) and have the light cones, that represent the cameras view, update dynamically, instead of having to rebuild all the time.

The first problem is basically a time saving problem, as I currently model with a series of semi transparent extrudes.

The big problem is, how can I make the cone of the cameras view not error out if it goes off the edge of a mirror ? ie : how can if just keep shining thru for that portion ?

Any help would be much appreciated,

Thanks.