function Subtract(AVec1, AVec2 : TPoint) : TPoint;
begin
Result.X := AVec1.X - AVec2.X;
Result.Y := AVec1.Y - AVec2.Y;
end;
function LineIntersect(LineAP1, LineAP2, LineBP1, LineBP2 : TPoint) : TPointFloat;
Var
LDetLineA, LDetLineB, LDetDivInv : Real;
LDiffLA, LDiffLB : TPoint;
begin
LDetLineA := LineAP1.X*LineAP2.Y - LineAP1.Y*LineAP2.X;
LDetLineB := LineBP1.X*LineBP2.Y - LineBP1.Y*LineBP2.X;
LDiffLA := Subtract(LineAP1, LineAP2);
LDiffLB := Subtract(LineBP1, LineBP2);
if (LDiffLA.X*LDiffLB.Y) - (LDiffLA.Y*LDiffLB.X) <> 0 then begin
LDetDivInv := 1 / ((LDiffLA.X*LDiffLB.Y) - (LDiffLA.Y*LDiffLB.X));
Result.X := ((LDetLineA*LDiffLB.X) - (LDiffLA.X*LDetLineB)) * LDetDivInv;
Result.Y := ((LDetLineA*LDiffLB.Y) - (LDiffLA.Y*LDetLineB)) * LDetDivInv;
end;
end;
Сообщение отредактировано: bigglewood -