Instance

origin returns:

Method
`isOpen`	Whether it's open or opening.
`open({ instant })`	Open, or turn round if it's closing.
`close({ instant })`	Close, or turn round if it's opening.
`toggle()`	Open if it's closed or closing, and close otherwise.
`set(options)`	Change any option except `open`.
`destroy()`	Stop, and remove anything it added.

instant: true jumps to the end with no animation. The meshes, springs and drivers the effects are built from are exported too, for drawing them some other way.