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<div class="fragment"><pre class="comment"> bin_tree =PSLz3aI_recursive_break_tree(c_x,c_y,index)

 Break a continuous curve into a set of straight line 
 tokens using the procedure described in Lowe's SCEPRO '87 paper. 
 The procedure is recursive and scale invariant.
 At each recursion level it breaks  the curve into two curve segments
 at the point where the curve difference from its straight-line
 approximation is maximal.
 Termi