Function kurbo::flatten

pub fn flatten(
    path: impl IntoIterator<Item = PathEl>, 
    tolerance: f64, 
    callback: impl FnMut(PathEl)
)

Flatten the path, invoking the callback repeatedly.

See BezPath::flatten for more discussion. This signature is a bit more general, allowing flattening of &[PathEl] slices and other iterators yielding PathEl.