UE4线条交点坐标获取方法

    // Get A,B,C of first line - points : ps1 to pe1
	float A1 = pe1.Y - ps1.Y;
	float B1 = ps1.X - pe1.X;
	float C1 = A1 * ps1.X + B1 * ps1.Y;

	// Get A,B,C of second line - points : ps2 to pe2
	float A2 = pe2.Y - ps2.Y;
	float B2 = ps2.X - pe2.X;
	float C2 = A2 * ps2.X + B2 * ps2.Y;

	// Get delta and check if the lines are parallel
	float delta = A1 * B2 - A2 * B1;
	if (delta == 0)
	{
		success = false;
	}
	else
	{
		success = true;
	}
	return FVector2D(
		(B2*C1 - B1 * C2) / delta,
		(A1*C2 - A2 * C1) / delta
	);