107 lines
3.0 KiB
C++
107 lines
3.0 KiB
C++
/*
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Copyright (C) 2010 Paul Davis
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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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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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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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#ifndef __libpbd_cartesian_h__
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#define __libpbd_cartesian_h__
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#include <cfloat>
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#include <cmath>
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#include "pbd/libpbd_visibility.h"
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namespace PBD {
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LIBPBD_API void spherical_to_cartesian (double azi, double ele, double len, double& x, double& y, double& z);
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LIBPBD_API void cartesian_to_spherical (double x, double y, double z, double& azi, double& ele, double& len);
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struct AngularVector;
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struct LIBPBD_API CartesianVector {
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double x;
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double y;
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double z;
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CartesianVector () : x(0.0), y(0.0), z(0.0) {}
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CartesianVector (double xp, double yp, double zp = 0.0) : x(xp), y(yp), z(zp) {}
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CartesianVector& translate (CartesianVector& other, double xtranslate, double ytranslate, double ztranslate = 0.0) {
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other.x += xtranslate;
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other.y += ytranslate;
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other.z += ztranslate;
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return other;
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}
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CartesianVector& scale (CartesianVector& other, double xscale, double yscale, double zscale = 1.0) {
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other.x *= xscale;
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other.y *= yscale;
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other.z *= zscale;
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return other;
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}
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inline void angular (AngularVector& a) const;
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};
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struct LIBPBD_API AngularVector {
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double azi;
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double ele;
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double length;
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AngularVector () : azi(0.0), ele(0.0), length (0.0) {}
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AngularVector (double a, double e, double l = 1.0) : azi(a), ele(e), length (l) {}
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AngularVector operator- (const AngularVector& other) const {
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AngularVector r;
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r.azi = azi - other.azi;
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r.ele = ele - other.ele;
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r.length = length - other.length;
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return r;
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}
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AngularVector operator+ (const AngularVector& other) const {
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AngularVector r;
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r.azi = azi + other.azi;
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r.ele = ele + other.ele;
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r.length = length + other.length;
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return r;
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}
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bool operator== (const AngularVector& other) const {
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return fabs (azi - other.azi) <= FLT_EPSILON &&
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fabs (ele - other.ele) <= FLT_EPSILON &&
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fabs (length - other.length) <= FLT_EPSILON;
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}
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bool operator!= (const AngularVector& other) const {
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return fabs (azi - other.azi) > FLT_EPSILON ||
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fabs (ele - other.ele) > FLT_EPSILON ||
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fabs (length - other.length) > FLT_EPSILON;
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}
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void cartesian (CartesianVector& c) const {
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spherical_to_cartesian (azi, ele, length, c.x, c.y, c.z);
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}
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};
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inline void CartesianVector::angular (AngularVector& a) const {
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cartesian_to_spherical (x, y, z, a.azi, a.ele, a.length);
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}
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}
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#endif /* __libpbd_cartesian_h__ */
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