问手动编辑几何图形后，三个JS无视觉更新

EN

        var oldVertices = this.vertices
        var oldFaces = this.faces;

        var newVertices = []
        var newFaces = [];

        var verticeChanges = [];

        this.vertices = [];
        this.faces = [];        


        for(var i in oldVertices){
            var curAr = ((newData.vertices[i]) ? (newVertices):(this.vertices));
            curAr.push(oldVertices[i]);
            verticeChanges[i] = curAr.length-1;
        }

        for(var i in oldFaces){
            var curAr = ((newData.faces[i]) ? (newFaces):(this.faces));
            oldFaces[i].a = verticeChanges[oldFaces[i].a];
            oldFaces[i].b = verticeChanges[oldFaces[i].b];
            oldFaces[i].c = verticeChanges[oldFaces[i].c];
        }
        console.log('Vertices Cut from', oldVertices.length, "to:", newVertices.length, 'and', this.vertices.length);
        console.log('Faces Cut from', oldFaces.length, "to:", newFaces.length,  'and', this.faces.length);