Highlighting objects

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Kenneth Gordon (gordon++at++ait.nrl.navy.mil)
Mon, 12 Aug 1996 11:07:41 -0400

I am trying to use a laser pointer to highlight certain certain objects, and am
trying to find a simple way to do it. The objects are fairly small, so I am
trying to highlight the bounding box (or sphere, if the box won't work) around
the object. I have come up with a couple of different ways, but none of them
seems to work very well, and I was wondering if anyone has any other ideas:

1. Using a pfHighlight for each geoset. This looks great when an object is
made up of only one geoset, however my objects are often made up of many
geosets. Is there a way to use a pfHighlight with a group node? I tried
highlighting each geoset individually, but it looks pretty bad that way (for
one thing, parts of the object disappear when the different highlighted boxes
intersect). If I could put ONE pfHighlight around the entire object, that
would be ideal.

2. Calculating the bounding sphere. Several problems with this method, the
worst being that for some reason, the radius of the bounding sphere is MUCH
larger than the object itself (the object is a plane (an F15) which is around
20 meters in length, but the bounding sphere I am getting has a radius of 501
meters). Something isn't working here!

Does anyone know of any other ways to do what I have in mind? Ideally, I'd
like one bounding box around the entire plane, but if that isn't possible, a
bounding sphere of the correct size would be fine.

Thanks, in advance.

-- Ken
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