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<p class="MsoNormal">I successfully implemented HAnimMotion node export from Maya using RawKee.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">You can see a video of the result running in Sunrize<o:p></o:p></p>
<p class="MsoNormal"><a href="https://drive.google.com/file/d/1JBe6kO1UnbsXvfpMKfI-75DhpDdzng-L/view?usp=sharing">https://drive.google.com/file/d/1JBe6kO1UnbsXvfpMKfI-75DhpDdzng-L/view?usp=sharing</a><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">If you look closely, you will notice that the rotation values are in the following order:<o:p></o:p></p>
<p class="MsoNormal">Xrotation Yrotation Zrotation<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is different from the recommend rotation order of:<o:p></o:p></p>
<p class="MsoNormal">Zrotation Xrotation Yrotation<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Here is my justification.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’m guessing that mocap systems that use BVH to record data have a rotation order of ZXY.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, characters in Maya, at least the ones that I have worked with, have a joint rotation order of XYZ.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Maya allows the artist to choose the rotation order of its joints. So I wrote the exporter so that it would export HAnimMotion nodes based on the joint rotation order chosen by the artist.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The Conan character’s joint rotation order in Maya is XYZ.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">From what I can tell, this is allowed by the spec, even though it might not be the recommended practice.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">It’s just not worth effort for me to do all the math required to force the animator to use an ZXY joint rotation order. Because that would completely mess up the animation within Maya.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The animation in the video looks slightly different than the TimeSensor/Interpolator version of the same animation, because the HAnimMotion version doesn’t export all the joint “translation” animations used by the Advanced Skelton tool.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">This is actually not a problem, as I only told it to export the joint position of the root joint node, but all the rotation values for the entire skeleton. I could have just as easily had RawKee export all the Position and Rotation information
for all the joint nodes.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We can debate whether or not I should allow anything other than ZXY joint rotation order, and we can debate whether I should allow position data to be exported for all joints, but it’s essentially working<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">RawKee can now export HAnimMotion nodes.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I’ll make a new release available once I’ve cleaned up a couple GUI issues and I enable AudioClip and MovieTexture support.<o:p></o:p></p>
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