code: public AABBf union(float x, float y, float z, AABBf dest) {
          dest.minX = this.minX < x ? this.minX : x;
          dest.minY = this.minY < y ? this.minY : y;
          dest.minZ = this.minZ < z ? this.minZ : z;
          dest.maxX = this.maxX > x ? this.maxX : x;
          dest.maxY = this.maxY > y ? this.maxY : y;
          dest.maxZ = this.maxZ > z ? this.maxZ : z;
          return dest;
      }
docs: Compute the union of <code>this</code> and the given point <code>(x, y, z)</code> and store the result in <code>dest</code>.
  
  @param x
  the x coordinate of the point
  @param y
  the y coordinate of the point
  @param z
  the z coordinate of the point
  @param dest
  will hold the result
  @return dest