bd028579
 易尊强
2/28
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
|
import { isAroundZero } from './helper.js';
var mathSin = Math.sin;
var mathCos = Math.cos;
var PI = Math.PI;
var PI2 = Math.PI * 2;
var degree = 180 / PI;
var SVGPathRebuilder = (function () {
function SVGPathRebuilder() {
}
SVGPathRebuilder.prototype.reset = function (precision) {
this._start = true;
this._d = [];
this._str = '';
this._p = Math.pow(10, precision || 4);
};
SVGPathRebuilder.prototype.moveTo = function (x, y) {
this._add('M', x, y);
};
SVGPathRebuilder.prototype.lineTo = function (x, y) {
this._add('L', x, y);
};
SVGPathRebuilder.prototype.bezierCurveTo = function (x, y, x2, y2, x3, y3) {
this._add('C', x, y, x2, y2, x3, y3);
};
SVGPathRebuilder.prototype.quadraticCurveTo = function (x, y, x2, y2) {
this._add('Q', x, y, x2, y2);
};
SVGPathRebuilder.prototype.arc = function (cx, cy, r, startAngle, endAngle, anticlockwise) {
this.ellipse(cx, cy, r, r, 0, startAngle, endAngle, anticlockwise);
};
SVGPathRebuilder.prototype.ellipse = function (cx, cy, rx, ry, psi, startAngle, endAngle, anticlockwise) {
var dTheta = endAngle - startAngle;
var clockwise = !anticlockwise;
var dThetaPositive = Math.abs(dTheta);
var isCircle = isAroundZero(dThetaPositive - PI2)
|| (clockwise ? dTheta >= PI2 : -dTheta >= PI2);
var unifiedTheta = dTheta > 0 ? dTheta % PI2 : (dTheta % PI2 + PI2);
var large = false;
if (isCircle) {
large = true;
}
else if (isAroundZero(dThetaPositive)) {
large = false;
}
else {
large = (unifiedTheta >= PI) === !!clockwise;
}
var x0 = cx + rx * mathCos(startAngle);
var y0 = cy + ry * mathSin(startAngle);
if (this._start) {
this._add('M', x0, y0);
}
var xRot = Math.round(psi * degree);
if (isCircle) {
var p = 1 / this._p;
var dTheta_1 = (clockwise ? 1 : -1) * (PI2 - p);
this._add('A', rx, ry, xRot, 1, +clockwise, cx + rx * mathCos(startAngle + dTheta_1), cy + ry * mathSin(startAngle + dTheta_1));
if (p > 1e-2) {
this._add('A', rx, ry, xRot, 0, +clockwise, x0, y0);
}
}
else {
var x = cx + rx * mathCos(endAngle);
var y = cy + ry * mathSin(endAngle);
this._add('A', rx, ry, xRot, +large, +clockwise, x, y);
}
};
SVGPathRebuilder.prototype.rect = function (x, y, w, h) {
this._add('M', x, y);
this._add('l', w, 0);
this._add('l', 0, h);
this._add('l', -w, 0);
this._add('Z');
};
SVGPathRebuilder.prototype.closePath = function () {
if (this._d.length > 0) {
this._add('Z');
}
};
SVGPathRebuilder.prototype._add = function (cmd, a, b, c, d, e, f, g, h) {
var vals = [];
var p = this._p;
for (var i = 1; i < arguments.length; i++) {
var val = arguments[i];
if (isNaN(val)) {
this._invalid = true;
return;
}
vals.push(Math.round(val * p) / p);
}
this._d.push(cmd + vals.join(' '));
this._start = cmd === 'Z';
};
SVGPathRebuilder.prototype.generateStr = function () {
this._str = this._invalid ? '' : this._d.join('');
this._d = [];
};
SVGPathRebuilder.prototype.getStr = function () {
return this._str;
};
return SVGPathRebuilder;
}());
export default SVGPathRebuilder;
|
