private static double BinarySubdivide(
double aX,
double aA,
double aB,
double mX1,
double mX2)
{
int num1 = 0;
double aT;
double num2;
do
{
aT = aA + (aB - aA) / 2.0;
num2 = CubicBezier.CalcBezierX(aT, mX1, mX2) - aX;
if (num2 > 0.0)
{
aB = aT;
}
else
{
aA = aT;
}
}while (Math.Abs(num2) > 1E-07 && ++num1 < 10);
return(aT);
}
private double NewtonRaphsonIterate(double aX, double aGuessT, double mX1, double mX2)
{
for (int index = 0; index < 4; ++index)
{
double slopeX = CubicBezier.GetSlopeX(aGuessT, mX1, mX2);
if (Math.Abs(slopeX) < 1E-07)
{
return(aGuessT);
}
double num = CubicBezier.CalcBezierX(aGuessT, mX1, mX2) - aX;
aGuessT -= num / slopeX;
}
return(aGuessT);
}
private CubicBezier(double x1, double y1, double x2, double y2, double yBegin = 0.0, double yEnd = 1.0)
{
this._y0 = yBegin;
this._y3 = yEnd;
this._x1 = x1;
this._y1 = y1;
this._x2 = x2;
this._y2 = y2;
if (0.0 > this._x1 || this._x1 > 1.0 || (0.0 > this._x2 || this._x2 > 1.0))
{
throw new ArgumentOutOfRangeException();
}
for (int index = 0; index < 11; ++index)
{
this._sampleValues[index] = CubicBezier.CalcBezierX((double)index * 0.1, this._x1, this._x2);
}
}