void SBGaussian::SBGaussianImpl::fillKValue(tmv::MatrixView<std::complex<double> > val,
double kx0, double dkx, int izero,
double ky0, double dky, int jzero) const
{
dbg<<"SBGaussian fillKValue\n";
dbg<<"kx = "<<kx0<<" + i * "<<dkx<<", izero = "<<izero<<std::endl;
dbg<<"ky = "<<ky0<<" + j * "<<dky<<", jzero = "<<jzero<<std::endl;
if (izero != 0 || jzero != 0) {
xdbg<<"Use Quadrant\n";
fillKValueQuadrant(val,kx0,dkx,izero,ky0,dky,jzero);
} else {
xdbg<<"Non-Quadrant\n";
assert(val.stepi() == 1);
const int m = val.colsize();
const int n = val.rowsize();
typedef tmv::VIt<double,1,tmv::NonConj> It;
kx0 *= _sigma;
dkx *= _sigma;
ky0 *= _sigma;
dky *= _sigma;
tmv::Vector<double> gauss_kx(m);
It kxit = gauss_kx.begin();
for (int i=0;i<m;++i,kx0+=dkx) *kxit++ = exp(-0.5 * kx0*kx0);
tmv::Vector<double> gauss_ky(n);
It kyit = gauss_ky.begin();
for (int j=0;j<n;++j,ky0+=dky) *kyit++ = exp(-0.5 * ky0*ky0);
val = _flux * gauss_kx ^ gauss_ky;
}
}
void SBGaussian::SBGaussianImpl::fillKImage(ImageView<std::complex<T> > im,
double kx0, double dkx, int izero,
double ky0, double dky, int jzero) const
{
dbg<<"SBGaussian fillKImage\n";
dbg<<"kx = "<<kx0<<" + i * "<<dkx<<", izero = "<<izero<<std::endl;
dbg<<"ky = "<<ky0<<" + j * "<<dky<<", jzero = "<<jzero<<std::endl;
if (izero != 0 || jzero != 0) {
xdbg<<"Use Quadrant\n";
fillKImageQuadrant(im,kx0,dkx,izero,ky0,dky,jzero);
} else {
xdbg<<"Non-Quadrant\n";
const int m = im.getNCol();
const int n = im.getNRow();
std::complex<T>* ptr = im.getData();
int skip = im.getNSkip();
assert(im.getStep() == 1);
kx0 *= _sigma;
dkx *= _sigma;
ky0 *= _sigma;
dky *= _sigma;
// The Gaussian profile is separable:
// im(kx,ky) = _flux * exp(-0.5 * (kx*kx + ky*ky)
// = _flux * exp(-0.5 * kx*kx) * exp(-0.5 * ky*ky)
std::vector<double> gauss_kx(m);
std::vector<double> gauss_ky(n);
typedef std::vector<double>::iterator It;
It kxit = gauss_kx.begin();
for (int i=0; i<m; ++i,kx0+=dkx) *kxit++ = fmath::expd(-0.5 * kx0*kx0);
if ((kx0 == ky0) && (dkx == dky) && (m==n)) {
gauss_ky = gauss_kx;
} else {
It kyit = gauss_ky.begin();
for (int j=0; j<n; ++j,ky0+=dky) *kyit++ = fmath::expd(-0.5 * ky0*ky0);
}
for (int j=0; j<n; ++j,ptr+=skip) {
for (int i=0; i<m; ++i)
*ptr++ = _flux * gauss_kx[i] * gauss_ky[j];
}
}
}
