Index: /trunk/Ohana/src/addstar/include/skycells.h
===================================================================
--- /trunk/Ohana/src/addstar/include/skycells.h	(revision 23136)
+++ /trunk/Ohana/src/addstar/include/skycells.h	(revision 23137)
@@ -12,5 +12,5 @@
 # include <glob.h>
 
-enum {SQUARES, TRIANGLES, LOCAL};
+enum {SQUARES, TRIANGLES, LOCAL, RINGS};
 enum {TETRAHEDRON, CUBE, OCTOHEDRON, DODECAHEDRON, ICOSAHEDRON};
 
@@ -67,4 +67,5 @@
 double SCALE;
 double PADDING;
+double CELLSIZE;
 int    LEVEL;
 
@@ -84,12 +85,19 @@
 int 	     sky_tessellation 	       	    PROTO((FITS_DB *db, int level, int Nmax, int mode, double scale));
 int          sky_tessellation_init          PROTO((double scale));
+
 int 	     sky_tessellation_local         PROTO((FITS_DB *db, int level, int Nmax));
 int 	     sky_tessellation_triangles     PROTO((FITS_DB *db, int level, int Nmax));
 int 	     sky_tessellation_squares       PROTO((FITS_DB *db, int level, int Nmax));
+int          sky_tessellation_rings         PROTO((FITS_DB *db, int level, int Nmax));
+
 int 	     sky_triangle_to_image     	    PROTO((Image *image, SkyTriangle *triangle));
 int 	     sky_triangle_to_rectangle 	    PROTO((SkyRectangle *image, SkyTriangle *triangle));
+
 int          sky_rectangle_local            PROTO((SkyRectangle *rectangle));
 int 	     sky_subdivide_image       	    PROTO((Image *output, SkyRectangle *input, int Nx, int Ny));
 int 	     sky_triangle_coords       	    PROTO((SkyTriangle *triangle));
+
+SkyRectangle *sky_rectangle_ring            PROTO((float dec, float dDEC, int *nring));
+
 SkyTriangle *sky_divide_triangles      	    PROTO((SkyTriangle *in, int *ntriangles));
 SkyTriangle *sky_base_triangles        	    PROTO((int *ntriangles));