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mgear-dev / shifter_classic_components

Components library for Shifter
MIT License
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shifter_classic_components: issue with arm 2jnt_freeTangents & leg 2jnt_freeTangents #33

Closed adamavery closed 5 years ago

adamavery commented 5 years ago

Orientation of deformers in both 2jnt_freeTangents & leg 2jnt_freeTangents seems to be strange, very hard to get good results when skinning.(see example attached) arm_issue

miquelcampos commented 5 years ago

Hi @adamavery Thanks for the feedback. and sorry for the late reply. I will try to check this on new year holidays.

miquelcampos commented 5 years ago

Hi @adamavery I have been checking this issue and here are the conclusions and solution/workarounds (I post this here just in case other people has the same questions/issue :) )

For the first issue: for this, the easiest solution for the elbow and knee mid-rotation is just add a gimmick blended joint: image after creation, you will see the new blended joint (yellow color) image

the process can be scripted. Check this video: https://www.youtube.com/watch?v=-JFPD3k3Sl4&t=8s

For the second issue: About the way is calculating the rotation for round arms. I can't change it. This is something related to the solver itself.
In the arm_2jnt_01 we are using the custom mgear roll spline solver. For the arm_2jnt_freetangent we are using the default Maya spline IK. I am talking about the differences and how to skin it in this video: https://www.youtube.com/watch?v=g5oEkXz_vaE

Fun fact: I have received last year same request but the other way. the freetangent orientation style in the regular arm :P I am sorry that I can't change this since it is the way that the solvers are design

Best regards, Miquel