Hi all,

I've just uploaded a set of quaternion helper objects for Max. You can find more info here:

OSX (UB) and Windows.

Enjoy!

Graham

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Quaternion helper objects. Convert between quaternion, Euler, cartesian and axis/angle representations.

quat "Represent, store and transform a quaternion" "The mul messsage, with a quaternion argument, rotates the stored quaternion by the argument. bang outputs the stored value. reset sets it to zero rotation. quat takes an optional int argument - how often quaternions are normalized. Reduce to improve object efficiency, but increase to avoid floating point error creeping into the angles. Default every 30 operations."

axis2quat Convert an axis/angle rotation (e.g. the output of jit.gl.handle) to quaternion

euler2quat Convert Euler rotations (azimuth/elevation/tilt or heading/attitude/ bank or yaw/pitch/roll) to quaternion

quat2axis Convert quaternion to axis/angle rotation (e.g. most jit.gl rotate arguments)

quat2car Select a unit vector in the quaternion rotation quat2car returns a unit vector representing a principal axis of the rotation, which can be useful to accumulate positions of moving objects for example. Argument 'x', 'y', 'z, '-x', '-y' or '-z' specifies which axis is the 'front'

quat2euler Convert quaternion to Euler angles (azimuth/elevation/tilt or heading/ attitude/bank or yaw/pitch/roll). NOTE: there is a loss of information in the conversion from quaternion to Euler angles. This behaviour is matched by the original Shoemake algorithm.

quatpov Rotate a cartesian point by a quaternion