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;
}
}
private static bool Solve2By2LinearSystem(double[][] m, double[] v)
{
double k = m[0][0] * m[1][1] - m[0][1] * m[1][0];
if (FloatingPointArithmetic.IsVerySmall(k))
{
return(false);
}
double num1 = v[0];
double num2 = v[1];
v[0] = (num1 * m[1][1] - m[0][1] * num2) / k;
v[1] = (m[0][0] * num2 - num1 * m[1][0]) / k;
return(true);
}
public static bool CompareAlgorithmsOnChordMonotoneCubic(Point[] controlPoints, double errorTolerance)
{
if (!BezierCurveFlattener.IsCubicChordMonotone(controlPoints, errorTolerance * errorTolerance))
{
return(false);
}
List <Point> list1 = new List <Point>(16);
List <Point> list2 = new List <Point>(16);
list1.Add(controlPoints[0]);
list2.Add(controlPoints[0]);
double x = controlPoints[3].X - controlPoints[2].X + controlPoints[1].X - controlPoints[0].X;
double y = controlPoints[3].Y - controlPoints[2].Y + controlPoints[1].Y - controlPoints[0].Y;
double num = 1.0 / errorTolerance;
uint depth = BezierCurveFlattener.Log8UnsignedInt32((uint)(FloatingPointArithmetic.Hypotenuse(x, y) * num + 0.5));
if (depth > 0U)
{
--depth;
}
if (depth > 0U)
{
BezierCurveFlattener.DoCubicMidpointSubdivision(controlPoints, depth, 0.75 * num, list1);
}
else
{
BezierCurveFlattener.DoCubicForwardDifferencing(controlPoints, 0.75 * num, list1);
}
BezierCurveFlattener.AdaptiveForwardDifferencingCubicFlattener differencingCubicFlattener = new BezierCurveFlattener.AdaptiveForwardDifferencingCubicFlattener(controlPoints, errorTolerance, errorTolerance, false);
Point p = new Point();
while (differencingCubicFlattener.Next(ref p))
{
list2.Add(p);
}
list1.Add(controlPoints[3]);
list2.Add(controlPoints[3]);
double[] cumulatedChordLength1 = VectorUtilities.GetCumulatedChordLength(list1, 0, list1.Count - 1);
double[] cumulatedChordLength2 = VectorUtilities.GetCumulatedChordLength(list2, 0, list2.Count - 1);
int firstBadVertexInQ = 0;
return(VectorUtilities.ArePolylinesClose(list1, cumulatedChordLength1, 0, list1.Count - 1, list2, cumulatedChordLength2, 0, list2.Count - 1, errorTolerance, ref firstBadVertexInQ));
}
public static void FlattenCubic(Point[] controlPoints, double errorTolerance, List <Point> resultPolyline, bool connect, List <double> resultParameters)
{
if (!connect || resultPolyline.Count == 0)
{
resultPolyline.Add(controlPoints[0]);
resultParameters.Add(0.0);
}
if (BezierCurveFlattener.IsCubicChordMonotone(controlPoints, errorTolerance * errorTolerance))
{
BezierCurveFlattener.AdaptiveForwardDifferencingCubicFlattener differencingCubicFlattener = new BezierCurveFlattener.AdaptiveForwardDifferencingCubicFlattener(controlPoints, errorTolerance, errorTolerance, true);
Point p = new Point();
double u = 0.0;
while (differencingCubicFlattener.Next(ref p, ref u))
{
resultPolyline.Add(p);
resultParameters.Add(u);
}
}
else
{
double x = controlPoints[3].X - controlPoints[2].X + controlPoints[1].X - controlPoints[0].X;
double y = controlPoints[3].Y - controlPoints[2].Y + controlPoints[1].Y - controlPoints[0].Y;
double num = 1.0 / errorTolerance;
uint depth = BezierCurveFlattener.Log8UnsignedInt32((uint)(FloatingPointArithmetic.Hypotenuse(x, y) * num + 0.5));
if (depth > 0U)
{
--depth;
}
if (depth > 0U)
{
BezierCurveFlattener.DoCubicMidpointSubdivision(controlPoints, depth, 0.0, 1.0, 0.75 * num, resultPolyline, resultParameters);
}
else
{
BezierCurveFlattener.DoCubicForwardDifferencing(controlPoints, 0.0, 1.0, 0.75 * num, resultPolyline, resultParameters);
}
}
resultPolyline.Add(controlPoints[3]);
resultParameters.Add(1.0);
}
