public override bool TryTransform(Point uv, out Point outPoint)
{
double R = 0.5;
double u = double.NaN;
double v = double.NaN;
if (IsInverse)
{
Vector3D xyz = new Vector3D((uv.X - 0.5) * 2.0, uv.Y - 0.5, 0.0);
double z2 = R * R - xyz.X * xyz.X - xyz.Y * xyz.Y;
if (z2 >= 0)
{
xyz.Z = Math.Sqrt(z2);
xyz = PlateCarreEffect.InverseMatrix3D.Transform(xyz);
u = 0.995 * MathTool.Frac(0.5 * Math.Atan2(xyz.X, xyz.Z) / Math.PI - 0.5);
v = 0.5 + Math.Asin(xyz.Y / R) / Math.PI;
}
}
else
{
}
outPoint = new Point(u, v);
return(!(double.IsNaN(u) || double.IsNaN(v)));
}