Spherical maps

There are two kinds of spherical maps according pixelization algorithms. SphereHEALPix represents spheres pixelized following the HEALPIix algorithm (E. Yvon, K. Gorski), SphereThetaPhi represents spheres pixelized following an algorithm developed at LAL-ORSAY. The example below shows creating and filling of a SphereHEALPix with nside = 8 (it will be 12*8*8= 768 pixels) :

#include "spherehealpix.h"
// ...
SphereHEALPix<double> sph(8);
for (int k=0; k< sph.NbPixels(); k++) sph(k) = (double)(10*k);

SphereThetaPhi is used in a similar way with an argument representing number of slices in theta (Euler angle) for an hemisphere.