Intersections in Alpha 72 Beta

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Cindy Tonnesen (tonnesen++at++enews.nrl.navy.mil)
Fri, 3 Dec 93 16:21:55 -0500

1) What is the proper strategy for detecting intersections between
two performer objects? What are the functions that I should look
at to do this?
2) What is the proper strategy for detecting intersections of line
segments with performer objects? I've been using pfSegsIsectNode(). But
since my line is actually contained in a GeoSet that has 3 DCS ancestors
I must concatenate 3 matrices together and call pfXformPt3() twice, one
for the startpoint and one for the endpoint of my line segment, to transform
my line segment into world coords. This all happens before calling
pfSegsIsectNode(). This is quite inefficient - What is a better way to do this?

Thanks in advance for your help,
Cynthia Tonnesen
Naval Research Lab

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