BVH Export

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The BVH export exports all root objects, and their children, from the current shot. As with the BVH imports, you'll have the options to select whether you want to write the file with Y up or Z up, and to scale the scene; choose these according to what you want downstream.

There's one important question: whether to allow translating joints or not. This is relevant only if your hierarchy includes some unlocked translating joints (aside from the root object), or if the only unlocked non-root joints are rotational. You would typically have translational joints for secondary surface animations, however, BVH files do not normally contain this kind of joint, only rotational joints. Translational joints can easily be described, and the SynthEyes exporter does that—but some BVH-reading programs may not be designed to accommodate that. This checkbox controls only whether you are warned about this potential problem, or not.

If your hierarchy has translating joints, and your downstream app does not read them, you are better off using FBX or ABC exports. Alternatively, you will have to reformulate your hierarchy to use rotational joints with a very long pivot distance, instead of the translational joints.

Note that SynthEyes's BVH-reading scripts can accept translating joints, of course.

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