(see attached pic) 
  
Would like to create cutter geo procedurally based on hand-drawn curves.. 
Wondering if there's a trick to generate closed geo pieces wherever 
drawn curves form "closed" shapes.. 
  
Messing with using cookie-type operations to progressively cut-up 
an existing surface, but wondering if there's a more elegant 
way to detect closed spaces within the lines, and extrude them.. 
  
(intending to feed resulting cutters into vdb fracture 
  
  
  
thanks!