[Plib-users] Problem with sgHPRfromVec3

[Troy Y. <tro...@ho...>]

I saw a post about this before (I think in the plib-devel list)
but didn't see any response to confirm the problem.

I found that I had to do the following when I tried to use 
sgHPRfromVec3() to set my camera to look at a the
desired point.

sgSetVec3(lLookFrom, lX, lY, lZ);
sgSubVec3(lLookDir, gLookAt, lLookFrom);

sgHPRfromVec3(lLookHPR, lLookDir);

/* Seems to be an error in sgHPRfromVec3().
// Need to change pitch sign to get correct result.
*/
lLookHPR[1] *= -1.0;

/* set up the camera
*/
sgSetCoord(&lCameraPos, lLookFrom, lLookHPR);

Am I doing something wrong or is there really a problem?
I've been using v1.1.11 - was it a problem that has been fixed?
(I've upgraded to v1.2.0 but don't recall a change in behaviour -
I'll have to check to be sure I recompiled though).

Thanks for any help,

Troy.