Draw polyline with regl
npm install regl-line2dDraw polyline with regl.
Remake on gl-line2d:
* GPU join calculation.
* Bevel, round and rectangular joins.
* Dash patterns.
* Self-overlapping and sharp angles cases.
* Multiline rendering.
* Float64 precision.
*
Demo.
``js
let regl = require('regl')({extensions: 'angle_instanced_arrays'})
let line2d = require('regl-line2d')(regl)
// draw red triangle
line2d.render({ thickness: 4, points: [0,0, 1,1, 1,0], close: true, color: 'red' })
`
Draw line or multiple lines and update options, once per frame at most.
Option | Default | Description
---|---|---
positions, points, data | [] | Point coordinates, eg. [0,0, 1,1, 0,2, 1,-1] or [[0,0], [1,1], [0,2], [1,-1]].color, colors, stroke | black | CSS color string or an array with 0..1 values, eg. 'red' or [0, 0, 0, 1].fill | null | Fill area enclosed by line with defined color.opacity | 1 | Line transparency regardless of color.thickness, lineWidth, width, strokeWidth | 1 | Line width in px.dashes, dash, dasharray | null | Array with dash lengths in px, altering color/space pairs, ie. [2,10, 5,10, ...]. null corresponds to solid line.join, type | bevel | Join style: 'rect', 'round', 'bevel'. Applied to caps too.miterLimit | 1 | Max ratio of the join length to the thickness.close, closed, closePath | false | Connect last point with the first point with a segment.overlay | false | Enable overlay of line segments.range, dataBox | null | Visible data range.viewport, viewBox | null | Area within canvas, an array [left, top, right, bottom] or an object {x, y, w, h} or {left, top, bottom, right}.
To render multiple lines pass an array with options for every line as list:
`js`
line2d.render([
{thickness: 2, points: [0,0, 1,1], color: 'blue'},
{thickness: 2, points: [0,1, 1,0], color: 'blue'}
])
null argument will destroy line2d instance and dispose resources.
Update line(s) not incurring redraw.
Draw lines from last updated options. id integer can specify a single line from the list to redraw.
Dispose line2d` and associated resources.
* regl-scatter2d
* regl-error2d
* regl-line-builder
* instanced-lines-demos
(c) 2017 Dima Yv. MIT License
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