Joint rotate order

[matthew park]

Hi there,

since I am pretty new to Maya python api, I wonder how to set up the joint rotation order.  as you know default is xyz. 

In a python plug-in code,  I created joints and manipulate them. I want to set rotation order for the joints but when I looked up the api ref, it said rotation order should be set in MFnTransform function class not in MFnIkJoint with method. sounds like MFnTransform class is for any dag node needs to move and wonder how I can I use this or if my guess is right or not? using script flag could be another way, but as purpose of learning api to build a plug-in, I want to know about using lower level.

Any help will be much appreciate it!

Thanks a lot!

Matt,

       OMA ==> OpenMayaAnim

        jointFn = OMA.MFnIkJoint()

        for i in range(1, len(self.jointObjects)):

            jointFn.setObject(self.jointObjects[i])

            OpenMaya.MFnTransform.setRotationOrder(self, order, reorder)  <===?

            rotationAngle = OM.MAngle(self.jointOrientation, OM.MAngle.kDegrees)

            jointFn.setOrientation(OM.MEulerRotation(rotationAngle.asRadians(), 0, 0, self.rotOrder))

            translationVector = OM.MVector(0, self.jointDistance, 0)

            jointFn.setTranslation(translationVector, OM.MSpace.kTransform)

[br...@meljunky.com]

You need to create an instance of MFnTransform with a MObject or MDagPath before you can call setRotationOrder.

-brian

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[matthew park]

Hi Brian, 

Thanks for the quick reply.

Before I try, can you send me simple code hierarchy? peusdo is great enough for me.

Thanks for helping a starter!

Matt,

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[br...@meljunky.com]

Looking at the help docs for MFnIkJoint inheritance diagram, you already have access to the class MFnTransform and the method setOrientation.

You can just use:

jointFn.setOrientation(...)

without creating an instance of MFnTransform

-brian

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[matthew park]

Thanks brian, but jointFn.setOrientation(rotation, rotation order) seemed not working. I already tried with variable of flag if you see my code.

 jointFn.setOrientation(OM.MEulerRotation(rotationAngle.asRadians(), 0, 0, self.rotOrder))

Thanks anyway, I will look into it further.

Matt,

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