public static FInt Sqrt(FInt f)
{
byte numberOfIterations = 8;
if (f.RawValue > 0x64000)
{
numberOfIterations = 12;
}
if (f.RawValue > 0x3e8000)
{
numberOfIterations = 16;
}
return(Sqrt(f, numberOfIterations));
}
public static FInt Asin(FInt F)
{
bool isNegative = F < 0;
F = Abs(F);
if (F > FInt.OneF)
{
throw new ArithmeticException("Bad Asin Input:" + F.ToDouble());
}
FInt f1 = mul(mul(mul(mul(FInt.Create(145103 >> FInt.SHIFT_AMOUNT, false), F) -
FInt.Create(599880 >> FInt.SHIFT_AMOUNT, false), F) +
FInt.Create(1420468 >> FInt.SHIFT_AMOUNT, false), F) -
FInt.Create(3592413 >> FInt.SHIFT_AMOUNT, false), F) +
FInt.Create(26353447 >> FInt.SHIFT_AMOUNT, false);
FInt f2 = PI / FInt.Create(2, true) - (Sqrt(FInt.OneF - F) * f1);
return(isNegative ? f2.Inverse : f2);
}
public static FInt Sin(FInt i)
{
FInt j = (FInt)0;
for (; i < 0; i += FInt.Create(25736, false))
{
;
}
if (i > FInt.Create(25736, false))
{
i %= FInt.Create(25736, false);
}
FInt k = (i * FInt.Create(10, false)) / FInt.Create(714, false);
if (i != 0 && i != FInt.Create(6434, false) && i != FInt.Create(12868, false) &&
i != FInt.Create(19302, false) && i != FInt.Create(25736, false))
{
j = (i * FInt.Create(100, false)) / FInt.Create(714, false) - k * FInt.Create(10, false);
}
if (k <= FInt.Create(90, false))
{
return(sin_lookup(k, j));
}
if (k <= FInt.Create(180, false))
{
return(sin_lookup(FInt.Create(180, false) - k, j));
}
if (k <= FInt.Create(270, false))
{
return(sin_lookup(k - FInt.Create(180, false), j).Inverse);
}
else
{
return(sin_lookup(FInt.Create(360, false) - k, j).Inverse);
}
}
public static FInt Atan(FInt F)
{
return(Asin(F / Sqrt(FInt.OneF + (F * F))));
}
public static FInt Tan(FInt i)
{
return(Sin(i) / Cos(i));
}
public static FInt Cos(FInt i)
{
return(Sin(i + FInt.Create(6435, false)));
}
private static FInt mul(FInt F1, FInt F2)
{
return(F1 * F2);
}
public static FInt operator >>(FInt one, int amount)
{
return(FInt.Create(one.RawValue >> amount, false));
}