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...Determine The circumcenter of 3 points?
Autor: Arash Partow
Homepage: http://www.partow.net
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Tip Rating (16):  
     


procedure Circumcenter(const x1, y1, x2, y2, x3, y3: Double; out Px, Py: Double);
var
  
A: Double;
  C: Double;
  B: Double;
  D: Double;
  E: Double;
  F: Double;
  G: Double;
begin
  
A := x2 - x1;
  B := y2 - y1;
  C := x3 - x1;
  D := y3 - y1;
  E := A * (x1 + x2) + B * (y1 + y2);
  F := C * (x1 + x3) + D * (y1 + y3);
  G := 2.0 * (A * (y3 - y2) - B * (x3 - x2));
  if IsEqual(G, 0.0) then Exit;
  Px := (D * E - B * F) / G;
  Py := (A * F - C * E) / G;
end;
(* End of Circumcenter *)


 

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