Tracking camera...

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Jan A. Barglowski (jan++at++archimedes.chinalake.navy.mil)
Wed, 11 May 1994 12:24:20 -0700 (PDT)

Forgive me if this is really basic, but I want to implement a "tracking"
camera. That is, a camera which always looks at a particular model. This
model will be driven by data, so its position cannot be known before hand.

The way I've been going about it is: take the position of the model and
subtract the position of the camera. This gives a vector from the camera
to the model. The problem now is getting this vector into a hpr form so
that I can use the pfChanView function to set the viewing direction.

Am I going about this wrong? I've looked in the myriad of Performer
function calls to see if there is a conversion from vector to hpr, but
can't find any. Is there a "Performer way" that does all this
automatically?

Thanks in advance!

jan.

 Jan Anthony Barglowski Phone: (619) 927-1057
 Computer Dude Internet: jan++at++archimedes.nwc.navy.mil
 Visualization Lab Packet: SYSOP++at++WA6YBN.#SOCA.CA.US.NA
  Naval Air Warfare Center kc6uth++at++kc6uth.ampr.org
  -Weapons Division [44.17.2.6]

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