laya-coreui-es
Version:
laya核心库、ui库es版本，剔除了媒体、TTF等功能。基于 LayaAir-release_2.12.0 修改
73 lines (72 loc) • 2.6 kB
JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.Bezier = void 0;
const Point_1 = require("./Point");
class Bezier {
constructor() {
this._controlPoints = [new Point_1.Point(), new Point_1.Point(), new Point_1.Point()];
this._calFun = this.getPoint2;
}
_switchPoint(x, y) {
var tPoint = this._controlPoints.shift();
tPoint.setTo(x, y);
this._controlPoints.push(tPoint);
}
getPoint2(t, rst) {
var p1 = this._controlPoints[0];
var p2 = this._controlPoints[1];
var p3 = this._controlPoints[2];
var lineX = Math.pow((1 - t), 2) * p1.x + 2 * t * (1 - t) * p2.x + Math.pow(t, 2) * p3.x;
var lineY = Math.pow((1 - t), 2) * p1.y + 2 * t * (1 - t) * p2.y + Math.pow(t, 2) * p3.y;
rst.push(lineX, lineY);
}
getPoint3(t, rst) {
var p1 = this._controlPoints[0];
var p2 = this._controlPoints[1];
var p3 = this._controlPoints[2];
var p4 = this._controlPoints[3];
var lineX = Math.pow((1 - t), 3) * p1.x + 3 * p2.x * t * (1 - t) * (1 - t) + 3 * p3.x * t * t * (1 - t) + p4.x * Math.pow(t, 3);
var lineY = Math.pow((1 - t), 3) * p1.y + 3 * p2.y * t * (1 - t) * (1 - t) + 3 * p3.y * t * t * (1 - t) + p4.y * Math.pow(t, 3);
rst.push(lineX, lineY);
}
insertPoints(count, rst) {
var i;
count = count > 0 ? count : 5;
var dLen;
dLen = 1 / count;
for (i = 0; i <= 1; i += dLen) {
this._calFun(i, rst);
}
}
getBezierPoints(pList, inSertCount = 5, count = 2) {
var i, len;
len = pList.length;
if (len < (count + 1) * 2)
return [];
var rst = [];
switch (count) {
case 2:
this._calFun = this.getPoint2;
break;
case 3:
this._calFun = this.getPoint3;
break;
default:
return [];
}
while (this._controlPoints.length <= count) {
this._controlPoints.push(Point_1.Point.create());
}
for (i = 0; i < count * 2; i += 2) {
this._switchPoint(pList[i], pList[i + 1]);
}
for (i = count * 2; i < len; i += 2) {
this._switchPoint(pList[i], pList[i + 1]);
if ((i / 2) % count == 0)
this.insertPoints(inSertCount, rst);
}
return rst;
}
}
exports.Bezier = Bezier;
Bezier.I = new Bezier();