public static void rotate12(SMat3 vtav, Mat3 v)
{
if (vtav.m12 == 0)
{
return;
}
float c = 0, s = 0;
Schur2.rot12(vtav, c, s);
Givens.rot12_post(v, c, s);
}
public static void rotate01(SMat3 vtav, Mat3 v)
{
if (vtav.m01 == 0)
{
return;
}
float c = 0, s = 0;
Schur2.rot01(vtav, c, s);
Givens.rot01_post(v, c, s);
}
public static void Rotate01(SMat3 vtav, Mat3 v)
{
if (vtav.m01 == 0)
{
return;
}
double c = 0, s = 0;
Schur2.Rot01(vtav, c, s);
Givens.Rot01Post(v, c, s);
}
public static void Rotate12(SMat3 vtav, Mat3 v)
{
if (vtav.m12 == 0)
{
return;
}
double c = 0, s = 0;
Schur2.Rot12(vtav, c, s);
Givens.Rot12Post(v, c, s);
}
public static void getSymmetricSvd(SMat3 a, out SMat3 vtav, out Mat3 v,
float tol, int max_sweeps)
{
vtav = new SMat3();
v = new Mat3();
vtav.setSymmetric(a);
v.set(1, 0, 0, 0, 1, 0, 0, 0, 1);
float delta = tol * MatUtils.fnorm(vtav);
for (int i = 0; i < max_sweeps && MatUtils.off(vtav) > delta; ++i)
{
Schur2.rotate01(out vtav, out v, vtav, v);
Schur2.rotate02(out vtav, out v, vtav, v);
Schur2.rotate12(out vtav, out v, vtav, v);
}
}
