47 lines
1.8 KiB
TypeScript
47 lines
1.8 KiB
TypeScript
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// pathfinder/demo2/path-utils.ts
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//
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// Copyright © 2018 The Pathfinder Project Developers.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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import {Point2D} from "./geometry";
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import {SVGPath} from "./tiling";
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const SVGPath: (path: string) => SVGPath = require('svgpath');
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export function flattenPath(path: SVGPath): SVGPath {
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return path.abs().iterate(segment => {
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if (segment[0] === 'C') {
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const ctrl0 = new Point2D(parseFloat(segment[segment.length - 6]),
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parseFloat(segment[segment.length - 5]));
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const ctrl1 = new Point2D(parseFloat(segment[segment.length - 4]),
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parseFloat(segment[segment.length - 3]));
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const to = new Point2D(parseFloat(segment[segment.length - 2]),
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parseFloat(segment[segment.length - 1]));
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const ctrl = new Point2D(0.5 * (ctrl0.x + ctrl1.x), 0.5 * (ctrl0.y + ctrl1.y));
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return [['Q', "" + ctrl.x, "" + ctrl.y, "" + to.x, "" + to.y]];
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}
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if (segment[0] === 'A') {
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const to = new Point2D(parseFloat(segment[segment.length - 2]),
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parseFloat(segment[segment.length - 1]));
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return [['L', "" + to.x, "" + to.y]];
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}
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return [segment];
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});
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}
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export function canonicalizePath(path: SVGPath): SVGPath {
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return path.abs().iterate(segment => {
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if (segment[0] === 'H')
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return [['L', segment[1], '0']];
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if (segment[0] === 'V')
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return [['L', '0', segment[1]]];
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return [segment];
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});
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}
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