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BVH是BioVision等設(shè)備對(duì)人體運(yùn)動(dòng)進(jìn)行捕獲后產(chǎn)生文件格式的文件擴(kuò)展名。
BVH文件包含角色的骨骼和肢體關(guān)節(jié)旋轉(zhuǎn)數(shù)據(jù)。BVH 是一種通用的人體特征動(dòng)畫文件格式,，廣泛地被當(dāng)今流行的各種動(dòng)畫制作軟件支持。通?？蓮挠涗浫祟愋袨檫\(yùn)動(dòng)的運(yùn)動(dòng)捕獲硬件獲得。

BVH Importer就是After Effects導(dǎo)入運(yùn)動(dòng)數(shù)據(jù)動(dòng)作捕捉數(shù)據(jù)腳本，不僅支持“標(biāo)準(zhǔn)”ZXY Euler旋轉(zhuǎn)，但超越了這一點(diǎn)，接受混合聯(lián)合旋轉(zhuǎn)。任何XYZ，XZY，YXZ等組合是可以接受的。

What is BVH Importer
A BVH file is a format that was developed by Biovision, a motion capture services company, as a way to provide motion capture data and skeleton hierarchy information in addition to the motion data. A .bvh file is nothing more than a text file that has data that was captured from a moving skeletal system. Another name for this type of data capture is “Motion Capture” which has been abbreviated as mocap. You can find tons of free BVH motion data on the web or motion libraries for sale in BVH format. By using BVH Importer you can convert all these available resources to something that After Effects can handle and enrich your motion content.

The goal of this script is to use motion capture data on an avatar, or an articulated figure, which could be the first step in creating real world motion gestures in After Effects.

Euler angles
BVH Importer not only supports “standard” ZXY Euler rotations, but goes beyond that and accepts mixed joint rotations. Any XYZ, XZY, YXZ, etc combination is acceptable. The tool has a built-in file compatibility check option that will report any errors regarding the BVH file.

Skeleton
You can have skeletons in it’s rest position which will make rigging much easier, even if neutral pose is not defined in the BVH file. No motion data deformations are applied to it at the beginning of the animation. Use options to set the skeleton in the center of composition screen instead of arbitrary offsets defined in the BVH file.

工程流程：
01.Run BVH Importer and import BVH file. Check for file compatibility if it’s your first run for that particular script;
02.Adjust files parameters such as FPS, duration, animation range. Enable rest pose if you are planning on rigging this skeleton;
03.Set composition parameters and geometry options;
04.Apply the Beam Effect in order to get visual lines between joints
就這么簡(jiǎn)單?。?！

兼容性：After Effects CC 2014, CC, CS6, CS5.5, CS5, CS4, CS3

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