Q: When does pfDCS & pfSetChannelOffset occure?

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Eric Heft (eheft++at++dnaco.net)
Mon, 28 Jul 1997 19:06:15 -0400 (EDT)

Hi,

    I'm working on a flight simulator using perfly a the basis of this
code. . I've loaded an aircraft model into a DCS node which I use
pfDSCTrans and pfDSCRotate to move the aircraft around. I'm using
pfChanViewOffsets to have the camera move in response to the aircraft.
Using the following updateSim I expect the viewpoint to be somewhere
inside the model, instead the viewpoint seems to be trailing one
frame behind the model. The model and viewpoint seems to be
translating and rotating correctly.

void
updateSim(pfChannel *chan)
{
   /* ... all the perfly updateSim code ... */
   /* ... Stuff to read stick inputs and call the f15 dynamics ... */
   /* ... ship->rot contains current h,p,r rotations ... */
   /* ... ship->pos contains current x,y,z translations ... */
    
   pfDCSTrans(ship->dcs,ship->pos[0],ship->pos[1],ship->pos[2]);
   pfDCSRot(ship->dcs,ship->rot[0],ship->rot[1],ship->rot[2]);

   pfChanViewOffsets(Chan[0],ship->pos,ship->rot);
}

Thanks for any advise you may have.
Eric

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