set method
Implementation
Frustum set(Plane p0, Plane p1, Plane p2, Plane p3, Plane p4, Plane p5) {
var planes = this.planes;
planes[0].copy(p0);
planes[1].copy(p1);
planes[2].copy(p2);
planes[3].copy(p3);
planes[4].copy(p4);
planes[5].copy(p5);
return this;
}