Quote: "Perhaps I'm oversimplifying what you want, but if I wanted to see if a particular point in space was outside the camera view I would just place a small dummy plain there and use the OBJECT IN SCREEN command."
Nearly, but basically I want a 3D POINT IN SCREEN command, also object in screen is terrible command, avoid using it and go with frustrum culling which in it's simplest form is easy to implement for bounding meshes like spheres and boxes.
@Van B, I learned that from you a long time ago

Thou I usually go with the math (trig) approach!
Though, looking at it now and doing tests, the inverse of the view method is really fast. For instance:
1. Inverse Method is the fastest
2. Trig Method is 1.75 times slower (what I've been using cause I can supply it with any angle from whatever)
3. Van B's cheap method is 3 times slower than the fastest
Quote: "@Sasuke Any chance to see screenies of your editor ?? I like screenies of 3D editors..."
Well it's a new editor. Need to rewrite mine where I could edit the editor inside my editor, confusing yes. But I was thinking the other day, I created an object and my standard editor just didn't show all the info I wanted to see and it hit me, what if I could script how the editor functions inside the editor, so the major rewrite has begun. Gimme a sec to make a pic, I was rewriting something so it doesn't display anything at the mo, I warn you, early stage... but it's pretty!
"Get in the Van!" - Van B