message: added Vec3.setNaN
diff: @@ -47,6 +47,13 @@ namespace Vec3 {
  return isNaN(a[0]) || isNaN(a[1]) || isNaN(a[2])
  }
  + export function setNaN(out: Vec3) {
  + out[0] = NaN;
  + out[1] = NaN;
  + out[2] = NaN;
  + return out
  + }
  +
  export function fromObj(v: { x: number, y: number, z: number }): Vec3 {
  return create(v.x, v.y, v.z);
  }
  