code: public AABBd union(AABBd other, AABBd dest) {
          dest.minX = this.minX < other.minX ? this.minX : other.minX;
          dest.minY = this.minY < other.minY ? this.minY : other.minY;
          dest.minZ = this.minZ < other.minZ ? this.minZ : other.minZ;
          dest.maxX = this.maxX > other.maxX ? this.maxX : other.maxX;
          dest.maxY = this.maxY > other.maxY ? this.maxY : other.maxY;
          dest.maxZ = this.maxZ > other.maxZ ? this.maxZ : other.maxZ;
          return dest;
      }
docs: Compute the union of <code>this</code> and <code>other</code> and store the result in <code>dest</code>.
  
  @param other
  the other {@link AABBd}
  @param dest
  will hold the result
  @return dest