Forward vector from Affine3f

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mmarcin Registered Member Posts 9 Karma 0	Forward vector from Affine3f Tue Dec 06, 2011 2:01 am Is there an easy way to extract the forward vector from an Affine3f? Is transform.matrix().block<1,3>( 2, 0 ) the best I can do?
ggael Moderator Posts 3447 Karma 19 OS	Re: Forward vector from Affine3f Tue Dec 06, 2011 10:44 am transformation.translation(); see: http://eigen.tuxfamily.org/dox-devel/cl ... d7df00bc09
mmarcin Registered Member Posts 9 Karma 0	Re: Forward vector from Affine3f Tue Dec 06, 2011 4:57 pm I see it but isn't that the translation (4th column) not the forward vector (3rd column)?
ggael Moderator Posts 3447 Karma 19 OS	Re: Forward vector from Affine3f Tue Dec 06, 2011 7:15 pm oh, then t.affine().col(2) is what you want
mmarcin Registered Member Posts 9 Karma 0	Re: Forward vector from Affine3f Tue Dec 06, 2011 8:26 pm Perfect thanks!