snap-points-2d

    4.0.0 • Public • Published

    snap-points-2d

    Runs iterative snap rounding on a set of 2D coordinates to produce a hierarchical level of detail for optimizing online rendering of huge 2D plots.

    Install

    npm i snap-points-2d
    

    API

    {levels, ids, weights, points} = require('snap-points-2d')(points, bounds?)

    Reorders the points hierarchically such that those which are drawn at the same pixel coordinate are grouped together.

    Inputs
    • points is an input array of 2*n coordinate values. It is kept untouched.
    • bounds is an optional array of 4 bounding box values of the points.
    Outputs
    • points is an output float64 array with reordered an normalized to bounds point values.
    • ids is an output uint32 array which gets the reordered index of the points.
    • weights is an output uint32 array of point weights (number of points at the same pixel), which can be used for transparent rendering.
    • levels is an array of LOD scales. Each record is an object with the following properties:
      • pixelSize the pixel size of this level of detail in data units
      • offset the offset of this lod within the output array
      • count the number of items in the lod

    License

    (c) 2015 Mikola Lysenko. MIT License

    Install

    npm i snap-points-2d

    DownloadsWeekly Downloads

    862

    Version

    4.0.0

    License

    MIT

    Unpacked Size

    22 kB

    Total Files

    9

    Last publish

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    • mikolalysenko
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