[ggt-devel] Problems with Quats and scales on Matrix44f

[Doug M. <mc...@ia...>]

Hello,
     I am using gmtl 0.4.9. If I try to create a quat from this matrix I
get the following:

| 0.5 -0.866025 0 0 |
| 0.866025 0.5 0 0 |
| 0 0 1 0 |
| 0 0 0 1 |

 quat
(0, 0, 0.5, 0.866025)

Which gives me the correct end rotation. Now, if I take the same matrix
from above and apply a scale of 3 I get the following:

| 1.5 -2.59808 0 0 |
| 2.59808 1.5 0 0 |
| 0 0 3 0 |
| 0 0 0 1 |

 quat
(0, 0, 0.981981, 1.32288)

Which ends up over rotating by what appears to be a few degrees. It is my
understanding that I should be able to create a quat with a matrix that
does have scale on it, correct?

Thanks for the help.

Doug