public void SetIdentity ()
{
var m = new Matrix (5, 5, 5, 5, 5, 5);
m.SetIdentity ();
CheckMatrix (Matrix.Identity, m);
}
public void RotateQuadrants ()
{
var matrix = new Matrix ();
Action<double, double, double, double, double> prove = (angle, m11, m12, m21, m22) => {
matrix.SetIdentity ();
matrix.RotateAppend (angle);
CheckMatrix (new Matrix (m11, m12, m21, m22, 0, 0), matrix);
};
prove (90, 0, 1, -1, 0);
prove (-90, 0, -1, 1, 0);
prove (180, -1, 0, 0, -1);
prove (-180, -1, 0, 0, -1);
prove (270, 0, -1, 1, 0);
prove (-270, 0, 1, -1, 0);
prove (0, 1, 0, 0, 1);
prove (360, 1, 0, 0, 1);
prove (-360, 1, 0, 0, 1);
prove (360 + 90, 0, 1, -1, 0);
}
