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node_modules/d3-shape/src/curve/basisClosed.js
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52
node_modules/d3-shape/src/curve/basisClosed.js
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import noop from "../noop.js";
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import {point} from "./basis.js";
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function BasisClosed(context) {
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this._context = context;
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}
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BasisClosed.prototype = {
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areaStart: noop,
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areaEnd: noop,
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lineStart: function() {
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this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
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this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
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this._point = 0;
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},
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lineEnd: function() {
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switch (this._point) {
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case 1: {
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this._context.moveTo(this._x2, this._y2);
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this._context.closePath();
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break;
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}
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case 2: {
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this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
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this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
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this._context.closePath();
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break;
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}
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case 3: {
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this.point(this._x2, this._y2);
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this.point(this._x3, this._y3);
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this.point(this._x4, this._y4);
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break;
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}
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}
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},
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point: function(x, y) {
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x = +x, y = +y;
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switch (this._point) {
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case 0: this._point = 1; this._x2 = x, this._y2 = y; break;
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case 1: this._point = 2; this._x3 = x, this._y3 = y; break;
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case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;
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default: point(this, x, y); break;
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}
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this._x0 = this._x1, this._x1 = x;
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this._y0 = this._y1, this._y1 = y;
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}
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};
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export default function(context) {
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return new BasisClosed(context);
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}
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