След на паутине

   
  


  


     { position   }


     { circle   }


     { x, y, r   }


 circlesIntersect      


 circlesIntersect c1 c2  sqr (r c1  r c2)  sqr (x c1  x c2)  sqr (y c1  y c2)
      sqr x  xx


 findIntersecting    []  
 findIntersecting circle_ entities