veldt-js

> High performance on-demand tile-based rendering library


Installation

``bash
npm install veldt
`

Example

`javascript
// WebSocket endpoint for initiating tiling request
const WS_ENDPOINT = 'ws/tile';

// HTTP endpoint for pulling the finished tile.
const HTTP_ENDPOINT = 'tile';

// Open WebSocket connection for requesting tiles.
const requestor = new veldt.Requestor(WS_ENDPOINT, HTTP_ENDPOINT, err => {
// Check for error
if (err) {
console.error(err);
return;
}

// Create the central map object.
const map = new veldt.Map('#map', {
zoom: 3
});

// Create a CARTO base layer using a REST proxy tile.
const carto = new veldt.Layer.Rest();
carto.setPipeline('rest');
carto.setURI('dark_nolabels');
carto.setScheme('http');
carto.setEndpoint('a.basemaps.cartocdn.com');
carto.setExt('png');
carto.useXYZ();
carto.setRequestor(requestor);

// Create a Macro point layer.
const macro = new veldt.Layer.Macro();
macro.setPipeline('elastic');
macro.setURI('twitter-index');
macro.setLOD(4);
macro.setResolution(256);
macro.setXField('pixel.x');
macro.setYField('pixel.y');
macro.setBounds(0, Math.pow(2, 32), 0, Math.pow(2, 32));
macro.setRequestor(requestor);
macro.setRenderer(new veldt.Renderer.WebGL.Macro({
radius: 4,
color: [ 0.4, 0.8, 0.2, 0.8 ]
}));

// Add layers to the map.
map.add(carto);
map.add(macro);
});
`

Building

Note: currently, veldt-js requires node 8.x to build. It will not build in 10.x.
`javascript
npm run build
``