84 lines
2.0 KiB
JavaScript
84 lines
2.0 KiB
JavaScript
"use strict";
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import Voronoi from 'voronoi';
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import Vector2 from '../Helpers/Vector2.mjs';
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import Rectangle from '../Helpers/Rectangle.mjs';
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import SvgWriter from '../Helpers/SVGWriter.mjs';
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/**
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* Generates and manages a single voronoi SVGOverlay layer.
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*/
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class VoronoiOverlay {
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constructor() {
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this.border = new Vector2(0.1, 0.1); // lat / long
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this.cells = [];
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}
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addCells(...cells) {
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this.cells.push(...cells);
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}
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/**
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* Computes the bounding box of all the currently registered points.
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* Includes a border, which is defined by this.border.
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* @return {Rectangle} The bounding box of the currently registered points.
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*/
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computeBoundingBox() {
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let result = new Rectangle(Infinity, Infinity, -Infinity, -Infinity);
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for(let cell of this.cells) {
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if(cell.point.x < result.x) result.x = cell.point.x;
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if(cell.point.y < result.y) result.y = cell.point.y;
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if(cell.point.x > result.Right) result.Right = cell.point.x;
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if(cell.point.y > result.Bottom) result.Bottom = cell.point.y;
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}
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result.Left -= this.border.x;
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result.Right += this.border.x;
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result.Top -= this.border.y;
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result.Bottom += this.border.y;
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return result;
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}
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render() {
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let bounding_box = this.computeBoundingBox();
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// Recycle the diagram object if possible
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if(typeof VoronoiOverlay.diagram !== "undefined")
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VoronoiOverlay.voronoi.recycle(VoronoiOverlay.diagram);
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VoronoiOverlay.diagram = VoronoiOverlay.voronoi.compute(
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this.cells.map((cell) => cell.point),
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bounding_box
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);
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console.log(VoronoiOverlay.diagram);
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// TODO: Map the generated polygons back onto this.cells
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for(let their_cell of VoronoiOverlay.diagram.cells) {
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let our_cell = this.cells.find((el) => el.point.x == their_cell.site.x && el.point.y == their_cell.site.y);
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our_cell.def = their_cell;
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}
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console.log(this.cells);
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this.svg = new SvgWriter();
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// TODO: Render the SVG here
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}
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generate_overlay() {
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// TODO: Generate the Leaflet SVGOverlay here
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}
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}
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VoronoiOverlay.voronoi = new Voronoi();
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export default VoronoiOverlay;
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