The _Vocaloid Motion Data_ (VMD) file format is the file format used to store animations for models used in the MikuMikuDance (Polygon Movie Maker) animation program.
**load '.vmd' file**
```
pub fn vmd_read<R: Read>(read: &mut R) -> Result<Vmd, VmdError>
```
**save '.vmd' file**
```
pub fn vmd_write<W: Write>(write: &mut W, vmd: &Vmd) -> Result<(), VmdError>
```