@turf/bezier

@turf/bezier

bezier

Takes a line and returns a curved version by applying a Bezier spline algorithm.

The bezier spline implementation is by Leszek Rybicki.

Parameters

• line Feature<LineString> input LineString
• resolution [number] time in milliseconds between points (optional, default 10000)
• sharpness [number] a measure of how curvy the path should be between splines (optional, default 0.85)

Examples

var line = {
  "type": "Feature",
  "properties": {
    "stroke": "#f00"
  },
  "geometry": {
    "type": "LineString",
    "coordinates": [
      [-76.091308, 18.427501],
      [-76.695556, 18.729501],
      [-76.552734, 19.40443],
      [-74.61914, 19.134789],
      [-73.652343, 20.07657],
      [-73.157958, 20.210656]
    ]
  }
};

var curved = turf.bezier(line);

//addToMap
curved.properties = { stroke: '#0f0' };
var addToMap = [line, curved]

Returns Feature<LineString> curved line

---

This module is part of the Turfjs project, an open source module collection dedicated to geographic algorithms. It is maintained in the Turfjs/turf repository, where you can create PRs and issues.

Installation

Install this module individually:

$ npm install @turf/bezier

Or install the Turf module that includes it as a function:

$ npm install @turf/turf

Changelog

4.5.0

🚀 New Modules

• @turf/clusters Takes a set of points and partition them into clusters using the k-means clustering algorithm. (PR https://github.com/Turfjs/turf/pull/787 - Author @stebogit )

• @turf/boolean-disjoint Boolean-disjoint returns (TRUE) if the intersection of the two geometries is an empty set. (PR https://github.com/Turfjs/turf/pull/805 - Author @rowanwins)

• @turf/boolean-contains Boolean-contains returns True if the second geometry is completely contained by the first geometry. The interiors of both geometries must intersect and, the interior and boundary of the secondary (geometry b) must not intersect the exterior of the primary (geometry a). Boolean-contains returns the exact opposite result of the @turf/boolean-within. (PR https://github.com/Turfjs/turf/pull/797 - Author @rowanwins)

• @turf/boolean-crosses Boolean-Crosses returns True if the intersection results in a geometry whose dimension is one less than the maximum dimension of the two source geometries and the intersection set is interior to both source geometries. Boolean-Crosses returns t (TRUE) for only multipoint/polygon, multipoint/linestring, linestring/linestring, linestring/polygon, and linestring/multipolygon comparisons. (PR https://github.com/Turfjs/turf/pull/796 - Author @rowanwins)

• @turf/boolean-clockwise Takes a ring and return true or false whether or not the ring is clockwise or counter-clockwise. (PR https://github.com/Turfjs/turf/pull/789 - Authors @morganherlocker @stebogit)

• @turf/clone Prevents GeoJSON coordinates from being mutated, similar to JSON.parse(JSON.stringify(geojson)). Only cloning the coordinates can be 3x-20x faster than the parse + stringify approach. (PR https://github.com/Turfjs/turf/pull/824 - Author @DenisCarriere)

🏅 New Features/Enhancements

• convertArea Converts a area to the requested unit. (PR https://github.com/Turfjs/turf/pull/821 - Author @wnordmann)
• Adds mask option to @turf/point-grid (PR https://github.com/Turfjs/turf/pull/791)
• New @turf/isolines based on MarchingSquares.js (PR https://github.com/Turfjs/turf/pull/781)
• Use ES6 modules / Add module.js to @turf/turf (PR https://github.com/Turfjs/turf/pull/793)
• Create-new-module script (PR https://github.com/Turfjs/turf/pull/823)

🐛 Bug Fixes

• Buffer - Drop circle buffer operation (PR https://github.com/Turfjs/turf/pull/786)
• Fixes @turf/idw bad property name #774 (PR https://github.com/Turfjs/turf/pull/800)
• Fix for @turf/polygon-tangents - Resolves #785 (PR https://github.com/Turfjs/turf/pull/792)