/// <summary>
/// Rotation round the X-Axis
/// </summary>
/// <param name="angle"></param>
/// <returns></returns>
public static Matrixd RotateZ(double angle)
{
Matrixd m = Matrixd.GetIdentity(4, 4);
m[0, 0] = Math.Cos(angle);
m[0, 1] = -Math.Sin(angle);
m[1, 0] = Math.Sin(angle);
m[1, 1] = Math.Cos(angle);
return(m);
}
public Matrixd To33Matrix()
{
Matrixd m = Matrixd.GetIdentity(3, 3);
for (int r = 0; r < Math.Min(3, this.Rows); r++)
{
for (int c = 0; c < Math.Min(3, this.Columns); c++)
{
m[r, c] = this[r, c];
}
}
return(m);
}