traffic-laser/src/graphic/Geometry/Geometry.js

import { dataService } from "../Service/DataService";
// import { mathUtil } from "../Util/MathUtil.js/index.js";
import SymbolEvents from "../enum/SymbolEvents.js";

export default class Geometry {
  constructor() {
    this.len = null;
  }

  setId(vectorId) {
    if (vectorId == null || typeof vectorId === "undefined") {
      vectorId = dataService.getCurrentId();
      dataService.updateCurrentId();
      this.vectorId = this.geoType + vectorId;
    } else {
      this.vectorId = vectorId;
    }
  }

  setPointParent(parentId, dir) {
    if (this.parent == null) {
      this.parent = {};
    }

    this.parent[parentId] = dir;
  }

  setLeftEdge(edgeId) {
    this.leftEdgeId = edgeId;
  }

  setRightEdge(edgeId) {
    this.rightEdgeId = edgeId;
  }

  getParent() {
    return this.parent;
  }

  // ptSrc: 圆上某点(初始点);
  // ptRotationCenter: 圆心点;
  // angle: 旋转角度°  -- [angle * M_PI / 180]:将角度换算为弧度
  // 【注意】angle 逆时针为正，顺时针为负
  rotatePoint(ptSrc, ptRotationCenter, angle) {
    angle = -1 * angle; //设计是逆时针为负，顺时针为正
    var a = ptRotationCenter.x;
    var b = ptRotationCenter.y;
    var x0 = ptSrc.x;
    var y0 = ptSrc.y;
    var rx =
      a +
      (x0 - a) * Math.cos((angle * Math.PI) / 180) -
      (y0 - b) * Math.sin((angle * Math.PI) / 180);
    var ry =
      b +
      (x0 - a) * Math.sin((angle * Math.PI) / 180) +
      (y0 - b) * Math.cos((angle * Math.PI) / 180);
    var json = { x: rx, y: ry };
    return json;
  }
}