3 ms·
> The rotation formula eludes me. Interestingly, in a way, rotation is less mystical than the perspective projection. The rotation is linear: x' = Rx, but the
by smokel 10mo ago
> The rotation formula eludes me.
Interestingly, in a way, rotation is less mystical than the perspective projection. The rotation is linear: x' = Rx, but the perspective projection is non-linear.
This is where things become fun. Next up are homogeneous coordinates or quaternions. Takes a few years of your life to actually enjoy this though :)
- corysama 10mo agoI recently appreciated this vid explaining that 3D translation using the traditional 4x4 transform matrix is performing a shear operation in 4D. https://youtu.be/x1F4eFN_cos https://youtu.be/x1F4eFN_cos
- chuckadams 10mo agoI get how quaternions beat Euler angles, but I still can't visualize the damn things 8-/
- aleph_minus_one 10mo ago> I get how quaternions beat Euler angles, but I still can't visualize the damn things 8-/ And spin groups beat quaternions since they work in every (finite) dimension. :-)