40 lines
1.1 KiB
C++
40 lines
1.1 KiB
C++
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// point2d.cxx -- 2d coordinate routines
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//
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// Written by Curtis Olson, started September 1998.
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//
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// Copyright (C) 1998 Curtis L. Olson - curt@me.umn.edu
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// $Id$
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//
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#include <math.h>
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#include "point2d.hxx"
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// convert a point from cartesian to polar coordinates
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point2d cart_to_polar_2d(point2d in) {
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point2d result;
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result.dist = sqrt( in.x * in.x + in.y * in.y );
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result.theta = atan2(in.y, in.x);
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return(result);
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}
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