1.2 KiB
1.2 KiB
| title |
|---|
| Path.roughLength() |
The Path.roughLength() method returns a (very) rough estimate of the path's length.
Signature
Number path.roughLength()
Example
```js ({ Point, points, Path, paths, macro, units, part }) => {points.B = new Point(10, 30) points.BCp2 = new Point(40, 20) points.C = new Point(120, 30) points.CCp1 = new Point(50, -30)
paths.example = new Path() .move(points.B) .curve(points.BCp2, points.CCp1, points.C)
macro("pd", {
path: paths.example,
d: -10,
text: Path.roughLength() = ${units(paths.example.roughLength())}
})
macro("pd", {
path: paths.example,
d: 10,
text: Path.length() = ${units(paths.example.length())}
})
return part }
</Example>
## Notes
The `Path.roughLength()` is not intended to give an estimate that is accurate, but rather differentiates between paths that are a few millimeter long, or meters long.
It calculates the length without *walking the (cubic) Bezier curve* making it very fast and very inaccurate (for curves).
It is typically used to determine how much precision to apply when walking a curve.