问在运行时在三个js上裁剪平面

EN

switch(this.data.Axis){
   case 'X' : 
        this.clippingplane = new THREE.Plane(new THREE.Vector3(-1 , 0 , 0) , this.data.Slide) ; 
   break ; 


   case 'Y' :
   this.clippingplane = new THREE.Plane(new THREE.Vector3(0 , -1 , 0) , this.data.Slide) ; 
   break ; 

   case 'Z' :
   this.clippingplane = new THREE.Plane(new THREE.Vector3(0 , 0 , -1) , this.data.Slide) ; 
   break ; }
obj.traverseBreadthFirst(function(node){
        if(node instanceof THREE.Mesh){

            node.material.clipShadows = true ; 
            node.material.clippingPlanes = [] ; 
            node.material.clippingPlanes .push( this.clippingplane ); 
            node.material.needsUpdate = true ; 

        }
    });