Re: hpr calculations

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Nicolas Gauvin (nicolas++at++cae.ca)
Thu, 6 Feb 1997 23:02:12 -0500

The pfChannel view offset is relative to the regular channel view. The
final view is the product of both.

You should set the channel view of both channels as the center direction
returned by the bird and then add a left and right offset to the
appropriate channels.

Something like:

  Poll_Bird(Look_at,Look_up);
  AtUp_to_HPR(Look_at,Look_up,Dir);
  pfChanView(LeftChan, CurPos,Dir);
  pfChanView(RightChan, CurPos,Dir);
  pfChanViewOffsets(LeftChan,<0,0,0>,<+20,0,0>);
  pfChanViewOffsets(RightChan,<0,0,0>,<-20,0,0>);

You could also use a channel group to avoid calling pfChanView twice for
both channels.

Nicolas Gauvin CAE Electronics Ltd., 8585 Cote De Liesse
Software Developer Saint-Laurent, Quebec, Canada, H4L-4X4
3-D Graphics Applications tel: +1 514 341 2000 extension 2275
nicolas++at++cae.ca fax: +1 514 340 5496
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