`'thickness`

property of slurs variable depending on its length.The following snippet uses the function

`variable-bow-thickness`

which requires four values, two for min and max bow length (`min-l`

and `max-l`

, respectively) and two for min and max bow thickness (`min-t`

and `max-t`

, respectively). The final thickness is determined by the following conditions:- Length <
`min-l`

, then thickness =`min-t`

- Length >
`max-l`

, then thickness =`max-t`

`min-l`

≤ Length ≤`max-l`

, then thickness = linearly interpolated between`min-t`

and`max-t`