Forumunuz.Com - İki nokta arasındaki açı kaç derece?

Kod:
function RelativeAngle(X1,Y1, X2,Y2 : Integer) : Integer;

 

var

 

  Theta : Extended;

 

  XDist,

 

  YDist : Integer;

 

begin

 

  Result := 0;

 

 

 

  //arctan((y2-y1)/(x2-x1))

 

  XDist := X2 - X1;

 

  YDist := Y1 - Y2;

 

  if (XDist = 0) and (YDist=0) then exit;

 

 

 

  if YDist=0 then

 

    Theta := arctan((X2-X1))

 

  else

 

    Theta := arctan((X2-X1)/(Y1-Y2));

 

 

 

  Result := Round(RadToDeg(Theta));

 

  if (X2 >= X1) and (Y2 >= Y1) then //Quadrant = 2

 

    Result := 90+(90-Abs(Result))

 

  else

 

  if (X2 <= X1) and (Y2 >= Y1) then //Quadrant = 3

 

    Result := 180 + Result

 

  else

 

  if (X2 <= X1) and (Y2 <= Y1) then //Quadrant = 4

 

    Result := 270+90-Abs(Result);

 

end;