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## Copyright (C) 2013-2022 Carnë Draug <carandraug@octave.org>
##
## This program 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 3 of the License, or
## (at your option) any later version.
##
## This program 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 this program; if not, see <http://www.gnu.org/licenses/>.
## private function with mean planet radius
function radius = spheres_radius (obj)
objects = struct ("sun", 694460,
"mercury", 2439,
"venus", 6051,
"earth", 6371,
"moon", 1738,
"mars", 3390,
"jupiter", 69882,
"saturn", 58235,
"uranus", 25362,
"neptune", 24622,
"pluto", 1151);
obj = tolower (obj);
if (! isfield (objects, obj))
stack = dbstack;
error ("%s: unknown SPHERE object", stack(2).name);
endif
radius = objects.(obj);
endfunction
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