21 lines
776 B
JavaScript
21 lines
776 B
JavaScript
import Quad from "./quad.js";
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export default function(callback) {
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var quads = [], next = [], q;
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if (this._root) quads.push(new Quad(this._root, this._x0, this._y0, this._x1, this._y1));
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while (q = quads.pop()) {
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var node = q.node;
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if (node.length) {
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var child, x0 = q.x0, y0 = q.y0, x1 = q.x1, y1 = q.y1, xm = (x0 + x1) / 2, ym = (y0 + y1) / 2;
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if (child = node[0]) quads.push(new Quad(child, x0, y0, xm, ym));
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if (child = node[1]) quads.push(new Quad(child, xm, y0, x1, ym));
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if (child = node[2]) quads.push(new Quad(child, x0, ym, xm, y1));
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if (child = node[3]) quads.push(new Quad(child, xm, ym, x1, y1));
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}
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next.push(q);
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}
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while (q = next.pop()) {
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callback(q.node, q.x0, q.y0, q.x1, q.y1);
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}
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return this;
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}
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