CGTalk - rotation problem

squall_svk

02-20-2006, 09:20 AM

hi,

i'm trying to rotate object by 10 degrees in X,Y and Z at the same time. after first rotation, everything is OK, but after second is not. thanks for your help, here's the code :)

a = eulerangles 10 10 10
(eulerAngles 10 10 10)

rotate $ a
OK

inverse $.rotation as eulerangles
(eulerAngles 10 10 10) -- this is OK

rotate $ a
OK

inverse $.rotation as eulerangles
(eulerAngles 22.0451 17.9134 22.0451) -- this is what ??

Jeff_hanna

02-21-2006, 02:37 PM

You're probably encountering translation rounding error between eulerAngles and quaternions. Have you tried your code applying the rotations as quaternions?

squall_svk

02-21-2006, 02:51 PM

yes, same result with quat rotation

cyberluigi2k

02-21-2006, 04:11 PM

I think, the result you are getting is the multiplication of the two rotations. If you want to have your selected object with a given rotation you have to use:

$.rotation.controller.value = a

Using "rotate $ a" you add the given rotation to the one the object already has...

But maybe I haven't understood what you wanted to do... which result were you expecting Max to return you??

/Lui

squall_svk

02-21-2006, 04:49 PM

thanks a lot, cyberluigi2k. your way is working ok, for me

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02-21-2006, 04:49 PM

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