Sergio Hernández Cadena / gammalib

Commit 4f199898170cf8bc0c21bf11cb44e9a3cf859ce7

Authored by Jürgen Knödlseder
1 parent f5618c95

Add sky map example code.

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Showing 2 changed files with 77 additions and 0 deletions
examples/cpp/createskymap/Makefile 0 → 100644
  View file @4f19989
  1 +CXX=g++
  2 +CFLAGS=-I/usr/local/gamma/include/gammalib
  3 +LDFLAGS=-L/usr/local/gamma/lib -lgamma
  4 +DEPS=
  5 +OBJ=createskymap.cpp
  6 +
  7 +createskymap: $(OBJ)
  8 + $(CXX) -o $@ $^ $(CFLAGS) $(LDFLAGS)
... ...
examples/cpp/createskymap/createskymap.cpp 0 → 100644
  View file @4f19989
  1 +/***************************************************************************
  2 + * createskymap.cpp - Create sky map *
  3 + * ----------------------------------------------------------------------- *
  4 + * copyright (C) 2013 by Juergen Knoedlseder *
  5 + * ----------------------------------------------------------------------- *
  6 + * *
  7 + * This program is free software: you can redistribute it and/or modify *
  8 + * it under the terms of the GNU General Public License as published by *
  9 + * the Free Software Foundation, either version 3 of the License, or *
  10 + * (at your option) any later version. *
  11 + * *
  12 + * This program is distributed in the hope that it will be useful, *
  13 + * but WITHOUT ANY WARRANTY; without even the implied warranty of *
  14 + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
  15 + * GNU General Public License for more details. *
  16 + * *
  17 + * You should have received a copy of the GNU General Public License *
  18 + * along with this program. If not, see <http://www.gnu.org/licenses/>. *
  19 + * *
  20 + ***************************************************************************/
  21 +/**
  22 + * @file createskymap.cpp
  23 + * @brief Create sky map
  24 + * @author Juergen Knoedlseder
  25 + */
  26 +
  27 +/* __ Includes ___________________________________________________________ */
  28 +#include "GammaLib.hpp"
  29 +
  30 +
  31 +/***********************************************************************//**
  32 + * @brief Create sky map
  33 + *
  34 + * This code illustrates the creation of a sky map.
  35 + ***************************************************************************/
  36 +int main(void) {
  37 +
  38 + // Create a SNR shell model. The shell is centred on RA=0.3 deg and
  39 + // Dec=0.1 deg. The shell has an inner radius of 0.5 deg and a width
  40 + // of 0.1 deg.
  41 + GSkyDir centre;
  42 + centre.radec_deg(0.3, 0.1);
  43 + GModelSpatialRadialShell model(centre, 0.5, 0.1);
  44 +
  45 + // Create an empty sky map in celestial coordinates using a cartesian
  46 + // projection. The image is centred on RA=Dec=0, has a bin size of
  47 + // 0.01 degrees and 300 pixels in RA and Dec
  48 + double ra(0.0);
  49 + double dec(0.0);
  50 + double binsz(0.01);
  51 + int npix(300);
  52 + GSkymap image("CAR", "CEL", ra, dec, -binsz, binsz, npix, npix, 1);
  53 +
  54 + // Fill the sky map with the model image
  55 + GEnergy energy; // Dummy (not relevant as model is not energy dependent)
  56 + GTime time; // Dummy (not relevant as model is not time dependent)
  57 + for (int index = 0; index < image.npix(); ++index) {
  58 + GSkyDir dir = image.inx2dir(index); // sky coordinate of pixel
  59 + double theta = centre.dist(dir); // distance in radians
  60 + image(index) = model.eval(theta, energy, time);
  61 + }
  62 +
  63 + // Save the image to a FITS file
  64 + image.save("my_sky_map.fits", true);
  65 +
  66 + // Exit
  67 + return 0;
  68 +}
  69 +
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