4/24/2021 0 Comments Free Mocap Bvh
Not surprisingly, the homepage of mocapdata.com has the addressLINK --.Most of the fundamental information is quite usable, nevertheless.The motion of each bone is specified in local coordinates, relative to the parent and the bones own rest pose.If the rest poses of the source and target armatures differ, the source F-curves can not be used directly by the target armature.
Since the parents local Y points along its axis and its local Z points up, the child bone is rotated around the local X axis. This is not very useful if the target armature has a diffent rest pose. To retarget the pose, we therefore reexpress the transformation in the global coordinate system, as shown below. The local X rotation corresponds to a global Y rotation, and by a different angle. Once the global transformation matrix is known, we can reexpress it in the target bones local coordinate system. This will ensure that the source bone and the target bone will have the same global orientation. We do not always want the source and target bones to have identical orientation. In particular, the root or pelvis bone may point in entirely different directions in different armatures. ![]() If we instead keep the rotation offset from the rest poses, the target pose becomes much better, as shown below. To calibrate the source and target armature against each other, MalkWalk introduces extra keyframes at frame 0, where both armatures are posed in T-pose. In this way we can transfer animations from CMU to the MHX rig, despite the fact that the rest poses are very different. In the file selector, select the.bvh file. We choose the file 9004.bvh from the CMU database. This is not part of the originial.bvh file, but inserted by MakeWalk to calibrate the source armature (defined by the bvh file) and the target armature (the selected armature in the viewport) against each other. There is also built-in support for some more complex rigs: the MHX advanced rig from MakeHuman, the MHX rig from MakeHuman and Rigify. If so, a bone map must be defined manually, see -- Defining a Target Rig Manually. The process may even fail completely, usually because MakeWalk failed to automatically identify the bones of a complex rig. If this should happen, seeLINK:MakeWalkErrorsandCorrectiveActions -- Errors and Corrective ActionsLINK. ![]() BVH files can be bought from many commercial sources, but a large range of mocap files are also available for free download. However, the mocap tool can only read BVH files, so none of these files can be used directly. According to their homepage, mocapdata.com provides 744 premium motion data and 4197 free motion data.
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