Hi,
I have a littlie future request / suggestion.
Problem :
If I want to i.e. center object I have to do soemthing like :

#declare obj = union { .....  }
object { obj translate (max_extent(obj)-min_extent(obj))/2 }

So it would be useful to declare keyword 'this' :

object { obj translate (max_extent(this)-min_extent(this))/2 }

so 'this' is currently declared object, like :

union {
  // 'this' is now an empty object
  sphere { 0 1 } // 'this' is now an sphere
  sphere { 0 5 } // 'this' is now an union of two spheres
  box { 0, 1
     // 'this' placed here - is only a box
  }
  // 'this' placed here - is union of 2 spheres an a box
}


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