gl-scatter2d

WebGL 2D scatter plots for lots of points

Example

For now, see gl-plot2d.

Install

Using npm, you can install this module as follows:

npm i gl-scatter2d

API

Constructor

var scatter = require('gl-scatter2d')(plot, options)

Creates a new 2D scatter plot.

• plot is a reference to a gl-plot2d object
• options is a JSON object containing the parameters which are passed to the object when it is updated.

options has the following properties:

• positions is a packed 2*n length array of the unrolled xy coordinates of the points (required)
• size is a number giving the diameter of a marker in pixels (default 12)
• color is the color of a marker as a length 4 RGBA array (default [1,0,0,1])
• borderSize is the width of the border around each point in pixels (default 1)
• borderColor is the color of the border of each point (default [0,0,0,1])
• snapPoints defines whether points should be grouped hierarchically to optimize rendering of huge number of points

Returns A new scatter plot object, which is also registered to plot

Methods

scatter.update(options)

Updates the scatter plot.

• options is an object with the same properties as in the scatter plot constructor

scatter.dispose()

Destroys the scatter plot and all associated resources.

License

(c) 2015 Mikola Lysenko. MIT License

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