Overview
Developer Guide
Basics
3D Math
Geospatial Math
API Reference
@math.gl/culling
@math.gl/geoid
@math.gl/geospatial
@math.gl/proj4
@math.gl/sun
@math.gl/web-mercator
Concepts

cutPolylineByMercatorBounds

Splits a geospatial polyline at the 180th meridian.

``````import {cutPolylineByMercatorBounds} from '@math.gl/polygon';

cutPolylineByMercatorBounds([-10, -10, 10, 10, 30, -10], {size: 2, gridResolution: 10});
// returns [-10, -10, 0, 0, 10, 10, 20, 0, 30, -10]``````

Usage

``cutPolylineByMercatorBounds(positions, [options]);``

Arguments:

• `positions` (Array|TypedArray) - a flat array of the vertex positions that define the polyline. `x` is longitude in degrees, and `y` is latitude in degrees.
• `options` (Object, optional)
• `size` (Number) - the number of elements in each vertex. Size `2` will interpret `positions` as `[x0, y0, x1, y1, ...]` and size `3` will interpret `positions` as `[x0, y0, z0, x1, y1, z1, ...]`. Default `2`.
• `startIndex` (Number, optional) - the index in `positions` to start reading vertices. Default `0`.
• `endIndex` (Number, optional) - the index in `positions` to stop reading vertices. Default `positions.length`.
• `normalize` (Boolean) - make sure the output longitudes are within `[-180, 180]`. Default `true`.

Returns:

An array of polylines. Each polyline is represented by a positions array that uses the same vertex size as the input.