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104 lines
3.6 KiB
104 lines
3.6 KiB
import { isAroundZero } from './helper.js';
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var mathSin = Math.sin;
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var mathCos = Math.cos;
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var PI = Math.PI;
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var PI2 = Math.PI * 2;
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var degree = 180 / PI;
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var SVGPathRebuilder = (function () {
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function SVGPathRebuilder() {
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}
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SVGPathRebuilder.prototype.reset = function (precision) {
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this._start = true;
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this._d = [];
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this._str = '';
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this._p = Math.pow(10, precision || 4);
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};
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SVGPathRebuilder.prototype.moveTo = function (x, y) {
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this._add('M', x, y);
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};
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SVGPathRebuilder.prototype.lineTo = function (x, y) {
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this._add('L', x, y);
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};
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SVGPathRebuilder.prototype.bezierCurveTo = function (x, y, x2, y2, x3, y3) {
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this._add('C', x, y, x2, y2, x3, y3);
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};
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SVGPathRebuilder.prototype.quadraticCurveTo = function (x, y, x2, y2) {
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this._add('Q', x, y, x2, y2);
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};
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SVGPathRebuilder.prototype.arc = function (cx, cy, r, startAngle, endAngle, anticlockwise) {
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this.ellipse(cx, cy, r, r, 0, startAngle, endAngle, anticlockwise);
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};
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SVGPathRebuilder.prototype.ellipse = function (cx, cy, rx, ry, psi, startAngle, endAngle, anticlockwise) {
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var dTheta = endAngle - startAngle;
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var clockwise = !anticlockwise;
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var dThetaPositive = Math.abs(dTheta);
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var isCircle = isAroundZero(dThetaPositive - PI2)
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|| (clockwise ? dTheta >= PI2 : -dTheta >= PI2);
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var unifiedTheta = dTheta > 0 ? dTheta % PI2 : (dTheta % PI2 + PI2);
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var large = false;
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if (isCircle) {
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large = true;
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}
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else if (isAroundZero(dThetaPositive)) {
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large = false;
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}
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else {
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large = (unifiedTheta >= PI) === !!clockwise;
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}
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var x0 = cx + rx * mathCos(startAngle);
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var y0 = cy + ry * mathSin(startAngle);
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if (this._start) {
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this._add('M', x0, y0);
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}
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var xRot = Math.round(psi * degree);
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if (isCircle) {
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var p = 1 / this._p;
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var dTheta_1 = (clockwise ? 1 : -1) * (PI2 - p);
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this._add('A', rx, ry, xRot, 1, +clockwise, cx + rx * mathCos(startAngle + dTheta_1), cy + ry * mathSin(startAngle + dTheta_1));
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if (p > 1e-2) {
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this._add('A', rx, ry, xRot, 0, +clockwise, x0, y0);
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}
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}
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else {
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var x = cx + rx * mathCos(endAngle);
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var y = cy + ry * mathSin(endAngle);
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this._add('A', rx, ry, xRot, +large, +clockwise, x, y);
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}
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};
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SVGPathRebuilder.prototype.rect = function (x, y, w, h) {
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this._add('M', x, y);
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this._add('l', w, 0);
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this._add('l', 0, h);
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this._add('l', -w, 0);
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this._add('Z');
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};
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SVGPathRebuilder.prototype.closePath = function () {
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if (this._d.length > 0) {
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this._add('Z');
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}
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};
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SVGPathRebuilder.prototype._add = function (cmd, a, b, c, d, e, f, g, h) {
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var vals = [];
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var p = this._p;
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for (var i = 1; i < arguments.length; i++) {
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var val = arguments[i];
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if (isNaN(val)) {
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this._invalid = true;
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return;
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}
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vals.push(Math.round(val * p) / p);
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}
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this._d.push(cmd + vals.join(' '));
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this._start = cmd === 'Z';
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};
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SVGPathRebuilder.prototype.generateStr = function () {
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this._str = this._invalid ? '' : this._d.join('');
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this._d = [];
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};
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SVGPathRebuilder.prototype.getStr = function () {
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return this._str;
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};
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return SVGPathRebuilder;
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}());
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export default SVGPathRebuilder;
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