Wire Parameters & Rotation to Local Axis?

[peterjung]

Hi there

I have seen this type of problem discussed in several places however the suggested solutions have not been clear to me and I have not been able to understand.

The scene below shows the issue I have.  The red, green and blue  shapes are all linked to respective dummy objects. 

I have set up wire parameters to do the following:

I tried posting a screencast but seems to be an issue:

https://autode.sk/37Wj9g9

Dummy Red X rotation rotates Dummy Green in X axis

Dummy Blue Z rotation rotates Dummy Green in Z axis.

As long as Dummy Red is not rotated the rotation of Dummy Green is ok.

However with Dummy Red and Dummy Green rotated in X axis Dummy Green still rotates in the world Z axis rather than the rotated local Z axis.

Can someone please give a basic simple method on how to resolve this problem?

Thanks in advance!

[peterjung]

I have found some suggestions that you should use a Helper point as the link parent for the object you want to rotate and rotate the point.

I tried this but I am still getting something wrong.

Dummy-Blue Z rotation is wired to the Point-helper Z rotation

Dummy-Red X rotation is wired to the Point-helper X rotation

Dummy-Green is linked as a child to Point-helper

<iframe width="640" height="590" src="https://screencast.autodesk.com/Embed/Timeline/eb6e4a85-19d2-41df-8be7-afd70db5ac91" frameborder="0" allowfullscreen webkitallowfullscreen></iframe>

Same result as before… what am I missing?

[leeminardi]

Please post the Max file.

[leeminardi · Accepted solution]

I think the following does what you want without any helpers.

[peterjung]

Hi Leeminardi

Thank you so much for taking the time to look at this - you solution is logical and simple... seems I was overthinking this !  I just got time just now to look at your solution and I think I would do well to remember the K.I.S.S. principle.

Thanks again and I really appreciate your help!