我在我的代码中创建了一个ArrowHelper并通过调用下面的函数更新它的参数(每次调用此函数都会更新ArrowHelper维度):functionupdateArrowHelper(){//UpdateparametersfortransportedVectortransportedVector.arrowHelper.setLength(transportedVector.coordLocal.length(),headLengthVector,headWidthVector);transportedVector.arrowHelper.setDirection(direction

效果：代码：//引入轨道控制器扩展库OrbitControls.jsimport{OrbitControls}from"three/examples/jsm/controls/OrbitControls.js";exportdefault{data(){return{sphereGeometry:null,group:null,camera:null,mesh:null,renderer:null,requestAnimationFrame_time:null,B:null,lengthVal:0,normalizeVal:null,css3DRenderer:null,};},mounted