/***********************************************************************//**
* @brief Set sky directions and solid angles of events cube.
*
* @exception GLATException::no_sky
* No sky pixels found in event cube.
*
* This method computes the sky directions and solid angles for all event
* cube pixels. Sky directions are stored in an array of GLATInstDir objects
* while solid angles are stored in units of sr in a double precision array.
***************************************************************************/
void GLATEventCube::set_directions(void)
{
// Throw an error if we have no sky pixels
if (npix() < 1) {
throw GLATException::no_sky(G_SET_DIRECTIONS, "Every LAT event cube"
" needs a definition of the sky pixels.");
}
// Clear old pixel directions and solid angle
m_dirs.clear();
m_solidangle.clear();
// Reserve space for pixel directions and solid angles
m_dirs.reserve(npix());
m_solidangle.reserve(npix());
// Set pixel directions and solid angles
for (int iy = 0; iy < ny(); ++iy) {
for (int ix = 0; ix < nx(); ++ix) {
GSkyPixel pixel = GSkyPixel(double(ix), double(iy));
m_dirs.push_back(GLATInstDir(m_map.pix2dir(pixel)));
m_solidangle.push_back(m_map.solidangle(pixel));
}
}
// Return
return;
}
/***********************************************************************//**
* @brief Set event bin
*
* @param[in] index Event index [0,...,size()-1].
*
* @exception GException::out_of_range
* Event index is outside valid range.
* @exception GCTAException::no_energies
* Energy vectors have not been set up.
* @exception GCTAException::no_dirs
* Sky directions and solid angles vectors have not been set up.
*
* This method provides the event attributes to the event bin. The event bin
* is in fact physically stored in the event cube, and only a single event
* bin is indeed allocated. This method sets up the pointers in the event
* bin so that a client can easily access the information of individual bins
* as if they were stored in an array.
***************************************************************************/
void GCTAEventCube::set_bin(const int& index)
{
// Optionally check if the index is valid
#if defined(G_RANGE_CHECK)
if (index < 0 || index >= size())
throw GException::out_of_range(G_SET_BIN, index, 0, size()-1);
#endif
// Check for the existence of energies and energy widths
if (m_energies.size() != ebins() || m_ewidth.size() != ebins())
throw GCTAException::no_energies(G_SET_BIN);
// Check for the existence of sky directions and solid angles
if (m_dirs.size() != npix() || m_omega.size() != npix())
throw GCTAException::no_dirs(G_SET_BIN);
// Get pixel and energy bin indices.
int ipix = index % npix();
int ieng = index / npix();
// Set pointers
m_bin.m_counts = &(m_map.pixels()[index]);
m_bin.m_energy = &(m_energies[ieng]);
m_bin.m_time = &m_time;
m_bin.m_dir = &(m_dirs[ipix]);
m_bin.m_omega = &(m_omega[ipix]);
m_bin.m_ewidth = &(m_ewidth[ieng]);
m_bin.m_ontime = &m_ontime;
// Return
return;
}
/***********************************************************************//**
* @brief Print event cube information
***************************************************************************/
std::string GCTAEventCube::print(void) const
{
// Initialise result string
std::string result;
// Append header
result.append("=== GCTAEventCube ===");
result.append("\n"+parformat("Number of events")+str(number()));
result.append("\n"+parformat("Number of elements")+str(size()));
result.append("\n"+parformat("Number of pixels")+str(npix()));
result.append("\n"+parformat("Number of energy bins")+str(ebins()));
// Append skymap definition
result.append("\n"+m_map.print());
// Append GTI intervals
result.append("\n"+parformat("Time interval"));
if (gti().size() > 0) {
result.append(str(tstart().secs())+" - "+str(tstop().secs())+" sec");
}
else {
result.append("not defined");
}
// Append energy intervals
if (ebounds().size() > 0) {
result.append("\n"+ebounds().print());
}
else {
result.append("\n"+parformat("Energy intervals")+"not defined");
}
// Return result
return result;
}
/***********************************************************************//**
* @brief Print event cube information
*
* @param[in] chatter Chattiness.
* @return String containing event cube information.
***************************************************************************/
std::string GCTAEventCube::print(const GChatter& chatter) const
{
// Initialise result string
std::string result;
// Continue only if chatter is not silent
if (chatter != SILENT) {
// Append header
result.append("=== GCTAEventCube ===");
result.append("\n"+gammalib::parformat("Number of events") +
gammalib::str(number()));
result.append("\n"+gammalib::parformat("Number of elements") +
gammalib::str(size()));
result.append("\n"+gammalib::parformat("Number of pixels") +
gammalib::str(npix()));
result.append("\n"+gammalib::parformat("Number of energy bins") +
gammalib::str(ebins()));
// Append GTI intervals
result.append("\n"+gammalib::parformat("Time interval"));
if (gti().size() > 0) {
result.append(gammalib::str(tstart().secs()) +
" - " +
gammalib::str(tstop().secs())+" sec");
}
else {
result.append("not defined");
}
// Append energy intervals
if (gammalib::reduce(chatter) > SILENT) {
if (ebounds().size() > 0) {
result.append("\n"+ebounds().print(gammalib::reduce(chatter)));
}
else {
result.append("\n"+gammalib::parformat("Energy intervals") +
"not defined");
}
}
// Append skymap definition
if (gammalib::reduce(chatter) > SILENT) {
result.append("\n"+m_map.print(gammalib::reduce(chatter)));
}
} // endif: chatter was not silent
// Return result
return result;
}
/***********************************************************************//**
* @brief Set event bin
*
* @param[in] index Event index [0,...,size()-1].
*
* @exception GException::out_of_range
* Event index is outside valid range.
* @exception GLATException::no_energies
* Energy vectors have not been set up.
* @exception GLATException::no_dirs
* Sky directions and solid angles vectors have not been set up.
*
* This method provides the event attributes to the event bin. The event bin
* is in fact physically stored in the event cube, and only a single event
* bin is indeed allocated. This method sets up the pointers in the event
* bin so that a client can easily access the information of individual bins
* as if they were stored in an array.
***************************************************************************/
void GLATEventCube::set_bin(const int& index)
{
// Optionally check if the index is valid
#if defined(G_RANGE_CHECK)
if (index < 0 || index >= size()) {
throw GException::out_of_range(G_SET_BIN, index, 0, size()-1);
}
#endif
// Check for the existence of energies and energy widths
if (m_energies.size() != ebins() || m_ewidth.size() != ebins()) {
throw GLATException::no_energies(G_SET_BIN);
}
// Check for the existence of sky directions and solid angles
if (m_dirs.size() != npix() || m_solidangle.size() != npix()) {
throw GLATException::no_dirs(G_SET_BIN);
}
// Get pixel and energy bin indices.
m_bin.m_index = index;
m_bin.m_ipix = index % npix();
m_bin.m_ieng = index / npix();
// Set pointers
m_bin.m_cube = this;
m_bin.m_counts = const_cast<double*>(&(m_map.pixels()[index]));
m_bin.m_energy = &(m_energies[m_bin.m_ieng]);
m_bin.m_time = &m_time;
m_bin.m_dir = &(m_dirs[m_bin.m_ipix]);
m_bin.m_solidangle = &(m_solidangle[m_bin.m_ipix]);
m_bin.m_ewidth = &(m_ewidth[m_bin.m_ieng]);
m_bin.m_ontime = &m_ontime;
// Return
return;
}
/***********************************************************************//**
* @brief Print column information
*
* @param[in] chatter Chattiness.
* @return String containing column information.
*
* @todo Format and cfitsio information is mainly for debugging. This could
* be vanish in a more stable version of the code, or it could be compiled
* in conditionally using a debug option.
***************************************************************************/
std::string GFitsImage::print(const GChatter& chatter) const
{
// Initialise result string
std::string result;
// Continue only if chatter is not silent
if (chatter != SILENT) {
// Append header
result.append("=== GFitsImage ===");
// Append HDU information
result.append("\n"+print_hdu(chatter));
// Append image dimensions
result.append("\n"+gammalib::parformat("Image type"));
result.append(typecode(type()));
result.append("\n"+gammalib::parformat("Number of dimensions"));
result.append(gammalib::str(naxis()));
result.append("\n"+gammalib::parformat("Number of image pixels"));
result.append(gammalib::str(npix()));
for (int i = 0; i < naxis(); ++i) {
result.append("\n"+gammalib::parformat("Number of bins in "+gammalib::str(i)));
result.append(gammalib::str(naxes(i)));
}
// NORMAL: Append header information
if (chatter >= NORMAL) {
result.append(+"\n"+m_header.print(gammalib::reduce(chatter)));
}
} // endif: chatter was not silent
// Return result
return result;
}
