Imported healpix tree

external/healpix/libpsht/psht_geomhelpers.h

@@ -0,0 +1,72 @@
+/*
+ *  This file is part of libpsht.
+ *
+ *  libpsht is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  libpsht is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with libpsht; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/*
+ *  libpsht is being developed at the Max-Planck-Institut fuer Astrophysik
+ *  and financially supported by the Deutsches Zentrum fuer Luft- und Raumfahrt
+ *  (DLR).
+ */
+
+/*! \file psht_geomhelpers.h
+ *  PSHT helper function for the creation of grid geometries
+ *
+ *  Copyright (C) 2006, 2007, 2008 Max-Planck-Society
+ *  \author Martin Reinecke
+ */
+
+#ifndef PLANCK_PSHT_GEOMHELPERS_H
+#define PLANCK_PSHT_GEOMHELPERS_H
+
+#include "psht.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*! Creates a geometry information describing a HEALPix map with an
+    Nside parameter \a nside.
+    \ingroup geominfogroup */
+void psht_make_healpix_geom_info (int nside, int stride,
+  psht_geom_info **geom_info);
+
+/*! Creates a geometry information describing a HEALPix map with an
+    Nside parameter \a nside. \a weight contains the relative ring
+    weights and must have \a 2*nside entries.
+    \ingroup geominfogroup */
+void psht_make_weighted_healpix_geom_info (int nside, int stride,
+  const double *weight, psht_geom_info **geom_info);
+
+/*! Creates a geometry information describing a Gaussian map with \a nrings
+    iso-latitude rings and \a nphi pixels per ring. The azimuth of the first
+    pixel in each ring is 0.
+    \ingroup geominfogroup */
+void psht_make_gauss_geom_info (int nrings, int nphi, int stride,
+  psht_geom_info **geom_info);
+
+/*! Creates a geometry information describing an ECP map with \a nrings
+    iso-latitude rings and \a nphi pixels per ring. The azimuth of the first
+    pixel in each ring is \a phi0 (in radians).
+    \ingroup geominfogroup */
+void psht_make_ecp_geom_info (int nrings, int nphi, double phi0, int stride,
+  psht_geom_info **geom_info);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif