BVH 文件格式说明(中英文对照).doc

BVH 文件格式说明(中英文对照) 版本信息 版本号 作者 时间 备注 1.0 卢弋 2011-5-16 完成 目录 1 Biovision BVH 1 2 Parsing the file解析文件 1 3 Interpreting the data解读数据 4 BVH 文件格式说明(中英文对照) Biovision BVH The BVH file format was originally developed by Biovision, a motion capture services company, as a way to provide motion capture data to their customers. The name BVH stands for Biovision hierarchical data. This format mostly replaced an earlier format that they developed, the BVA format which is discussed in the next section, as a way to provide skeleton hierarchy information in addition to the motion data. The BVH format is an excellent all around format, its only drawback is the lack of a full definition of the basis pose (this format has only translational offsets of children segments from their parent, no rotational offset is defined), it also lacks explicit information for how to draw the segments but that has no bearing on the definition of the motion. BVH文件格式最初是由从事动画捕捉服务的公司Biovision开发，用于向其客户提供动画捕捉数据的方法。BVH这个名字代表Biovision层次数据。这种格式最大化的取代了他们以前开发的BVA格式(我们在下一节中讨论BVA格式)作为除了提供骨骼层次信息以外的动画数据的方法。BVH格式在所有格式里面是优秀的，它唯一的缺陷是对基础姿势缺乏完整定义（这种格式仅仅有来自父节点的子segments的水平偏移，没有定义旋转偏移），它还缺乏对如何绘制在动画定义中没有方位的部分的精确的信息。 Parsing the file解析文件 A BVH file has two parts, a header section which describes the hierarchy and initial pose of the skeleton; and a data section which contains the motion data. Examine the example BVH file called Example1.bvh. The start of the header section begins with the keyword HIERARCHY. The following line starts with the keyword ROOT followed by the name of the root segment of the hierarchy to be defined. After this hierarchy is described it is permissable to define another hierarchy, this too would be denoted by the keyword ROOT. In principle, a BVH file many contain any number of skeleton hierarchies. In practice the number of segments is limited by the format of the motion section, one sample in time for all segments is on one line of data and this will cause problems for readers which a