Creating new track types

To create new track types, there are a number of methods that need to be implemented:

Required

draw()

Render this track to the SVG or Pixi canvas.

Optional

These methods are not strictly required but may cause problems with certain functionality if not implemented.

exportSVG()

This method should return a string version of the SVG representation of this track. This is required for exporting and is not rendered.

Example: (from HeatmapTiledPixiTrack.js)

    exportSVG() {
        let svg = '<g>'
        for (let tile of this.visibleAndFetchedTiles()) {
            //console.log('sprite:', tile.canvas.toDataURL());
            let rotation = tile.sprite.rotation * 180 / Math.PI;

            svg += `<g
                    transform="translate(${tile.sprite.x}, ${tile.sprite.y})rotate(${rotation})scale(${tile.sprite.scale.x},${tile.sprite.scale.y})"
                >`;
            svg += '<image xlink:href="' + tile.canvas.toDataURL() + '"/>';
            svg += "</g>";
        }

        svg += '</g>';
        return svg;
    }