@polygonjs/polygonjs/dist/src/core/CursorMoveMonitor.js

node-based WebGL 3D engine https://polygonjs.com

"use strict";
import { Vector2 } from "three";
const _cursorDelta = new Vector2();
const _currentCursorPos = new Vector2();
export class CursorMoveMonitor {
  constructor() {
    this._lastCursorPosSet = false;
    this._movedCursorDistance = 0;
    this._lastCursorPos = new Vector2();
    this._bound = {
      pointermove: this._onPointermove.bind(this)
    };
  }
  addPointermoveEventListener(cursorRef) {
    this.cursorRef = cursorRef;
    this._movedCursorDistance = 0;
    this._lastCursorPosSet = false;
    document.addEventListener("pointermove", this._bound.pointermove);
    document.addEventListener("touchmove", this._bound.pointermove);
  }
  removeEventListener() {
    document.removeEventListener("pointermove", this._bound.pointermove);
    document.removeEventListener("touchmove", this._bound.pointermove);
  }
  movedCursorDistance() {
    return this._movedCursorDistance;
  }
  _onPointermove() {
    if (!this.cursorRef) {
      return;
    }
    const cursor = this.cursorRef.value;
    if (this._lastCursorPosSet == false) {
      this._lastCursorPos.copy(cursor);
      this._lastCursorPosSet = true;
    }
    _currentCursorPos.copy(cursor);
    _cursorDelta.copy(_currentCursorPos).sub(this._lastCursorPos);
    this._movedCursorDistance += _cursorDelta.manhattanLength() / 2;
    this._lastCursorPos.copy(_currentCursorPos);
  }
}