regl-map-animation

Animate x/y point data using regl and categorize them into a bar chart. Point data should be defined as an array of objects {x,y,value} - with "value" being the numerical indicator with which the points will be categorized.

Examples

Population grid of Europe | code

Different animation patterns

Phyllotaxis | Random | Sine | Spiral | Rollout

Installation & Usage

The project is built using UMD so it works both in browsers and in node.js

Node.js

Within a node.js project simply run the following command:

npm i regl-map-animation --save

Then import:

import { animation } from "regl-map-animation";

  ReglMapAnimation.animation()
    .container(container) // div element
    .pointData(pointData) // array of {x,y,value} objects
    .width(width)
    .height(height)
    .duration(500)
    .delayAtEnd(500)
    .binLabels(true)
    .legend(true)
    .legendTitle("Population per 5 km²")
    .animate();
});

Browsers

As a standalone script use:

<script src="https://unpkg.com/regl-map-animation/build/reglmapanimation.js"></script>

Then:

  ReglMapAnimation.animation()
    .container(container)
    .pointData(pointData)
    .width(width)
    .height(height)
    .duration(500)
    .delayAtEnd(500)
    .binLabels(true)
    .legend(true)
    .legendTitle("Population per 5 km²")
    .animate();
});

Methods

| Name | Description | Type | Required | Default | | ------------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | --------------------------------------- | -------- | -------------------------------------------------------------------- | | pointData | An array of objects with the following format: {x,y,value} - where value is the indicator used for categorization and colouring | [{x: number, y: number, value: number}] | True | | | logoData | An array of objects with the following format: {x,y,color?} - Can be used to display the points initially as a logo (or whatever other coordinates you wish) | [{x: number, y: number, color: string}] | False | | | logoColor | When the logoData does not have a color property specified, this color will be used for all points | string | False | 'red' | | centerLogo | Whether or not the logo should be centered in the container, if true it uses logoWidth() and logoHeight(), if false it uses the raw logo coordinates | Boolean | False | false | | logoWidth | Sets the width of the logo in pixels when using logoData and centerLogo is set to true | Number | False | 300 | | logoHeight | Sets the height of the logo in pixels when using logoData and centerLogo is set to true | Number | False | 100 | | container | container div on which regl will append its canvas | HTML element | False | document.body | | numPoints | number of points to display | number | False | pointData.length | | pointMargin | Margin applied to the bars in the bar chart | number | False | 1 | | pointWidth | webgl point width | number | False | 1 | | duration | The duration of each transition animation in milliseconds | number | False | 5000 | | delayAtEnd | How long to stay at a final frame before animating again (in milliseconds). Can also be specified as an array with one number for each transition e.g. logo > map > chart could be [500, 1000, 6000] | Number or Array | False | 0 | | width | Width of the animation container (pixels) | number | False | window.innerWidth | | height | Height of the animation container (pixels) | number | False | window.innerHeight | | thresholds | Thresholds used for categorizing points by their "value" attribute | array[number] | False | | | colors | An array of Hex values corresponding with the number of defined thresholds | array[hexString] | False | | | projectionFunction | d3-geo projection function | string | False | generates x and y scales based on the extents of the x/y data | | mapPadding | Add padding (in pixels) to the map animation | number | False | | backgroundColor | Sets the container's background colour (WebGL RGBA array of values from 0 to 1) | [number,number,number,number] | False | [1,1,1,1] (white) | | legend | Show legend | Boolean | False | True | | legendTitle | Title of legend | String | False | null | | xAxisTitle | Title text for x axis | String | False | null | | yAxisTitle | Title text for y axis | String | False | null | | chartOffsetX | X offset in pixels of the chart position in the container | Number | False | 100 | | chartOffsetY | Y offset in pixels of the chart position in the container | Number | False | -150 | | binlabels | Show labels for each bar chart 'bin' (bar) | Boolean | False | True | | binLabelOffsetX | X offset in pixels of each bin label | Number | False | 40 | | binLabelOffsetY | Y offset in pixels of each bin label | Number | False | -30 | | binLabelYFunction | Function used to define bin Y label | Function | False | (bin) => Math.round(bin.binCount) | | binLabelXFunction | Function used to define bin X label | Function | False | Returns threhold labels in the form of: threshold "to" nextThreshold | | initialAnimation | Define the type of transition used to load the initial points. Accepted values: "random", "phyllotaxis", "sine", "spiral", "rollout" | String | False | null (uses x & y from pointData) |

Notes

Inspired by Peter Beshai and adapted from his excellent tutorial on regl.

Node.js v16.