private static void DoCubicForwardDifferencing(Point[] controlPoints, double leftParameter, double rightParameter, double inverseErrorTolerance, List <Point> resultPolyline, List <double> resultParameters)
{
double num1 = controlPoints[1].X - controlPoints[0].X;
double num2 = controlPoints[1].Y - controlPoints[0].Y;
double num3 = controlPoints[2].X - controlPoints[1].X;
double num4 = controlPoints[2].Y - controlPoints[1].Y;
double num5 = controlPoints[3].X - controlPoints[2].X;
double num6 = controlPoints[3].Y - controlPoints[2].Y;
double num7 = num3 - num1;
double num8 = num4 - num2;
double num9 = num5 - num3;
double num10 = num6 - num4;
double num11 = num9 - num7;
double num12 = num10 - num8;
Vector vector = controlPoints[3] - controlPoints[0];
double length = vector.Length;
double num13 = length < FloatingPointArithmetic.DistanceTolerance ? Math.Max(0.0, Math.Max(VectorUtilities.Distance(controlPoints[1], controlPoints[0]), VectorUtilities.Distance(controlPoints[2], controlPoints[0]))) : Math.Max(0.0, Math.Max(Math.Abs((num7 * vector.Y - num8 * vector.X) / length), Math.Abs((num9 * vector.Y - num10 * vector.X) / length)));
uint num14 = 0U;
if (num13 > 0.0)
{
double d = num13 * inverseErrorTolerance;
num14 = d < (double)int.MaxValue ? BezierCurveFlattener.Log4UnsignedInt32((uint)(d + 0.5)) : BezierCurveFlattener.Log4Double(d);
}
int exp1 = -(int)num14;
int exp2 = exp1 + exp1;
int exp3 = exp2 + exp1;
double num15 = FloatingPointArithmetic.DoubleFromMantissaAndExponent(3.0 * num7, exp2);
double num16 = FloatingPointArithmetic.DoubleFromMantissaAndExponent(3.0 * num8, exp2);
double num17 = FloatingPointArithmetic.DoubleFromMantissaAndExponent(6.0 * num11, exp3);
double num18 = FloatingPointArithmetic.DoubleFromMantissaAndExponent(6.0 * num12, exp3);
double num19 = FloatingPointArithmetic.DoubleFromMantissaAndExponent(3.0 * num1, exp1) + num15 + 1.0 / 6.0 * num17;
double num20 = FloatingPointArithmetic.DoubleFromMantissaAndExponent(3.0 * num2, exp1) + num16 + 1.0 / 6.0 * num18;
double num21 = 2.0 * num15 + num17;
double num22 = 2.0 * num16 + num18;
double x = controlPoints[0].X;
double y = controlPoints[0].Y;
Point point = new Point(0.0, 0.0);
int num23 = 1 << (int)num14;
double num24 = num23 > 0 ? (rightParameter - leftParameter) / (double)num23 : 0.0;
double num25 = leftParameter;
for (int index = 1; index < num23; ++index)
{
x += num19;
y += num20;
point.X = x;
point.Y = y;
resultPolyline.Add(point);
num25 += num24;
resultParameters.Add(num25);
num19 += num21;
num20 += num22;
num21 += num17;
num22 += num18;
}
}
