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/*
Copyright (C) 2010 Paul Davis
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 2 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, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef __libpbd_cartesian_h__
#define __libpbd_cartesian_h__
#include <cfloat>
#include <cmath>
namespace PBD {
void azi_ele_to_cart (double azi, double ele, double& x, double& y, double& z);
void cart_to_azi_ele (double x, double y, double z, double& azi, double& ele);
struct AngularVector;
struct CartesianVector {
double x;
double y;
double z;
CartesianVector () : x(0.0), y(0.0), z(0.0) {}
CartesianVector (double xp, double yp, double zp = 0.0) : x(xp), y(yp), z(zp) {}
CartesianVector& translate (CartesianVector& other, double xtranslate, double ytranslate, double ztranslate = 0.0) {
other.x += xtranslate;
other.y += ytranslate;
other.z += ztranslate;
return other;
}
CartesianVector& scale (CartesianVector& other, double xscale, double yscale, double zscale = 1.0) {
other.x *= xscale;
other.y *= yscale;
other.z *= zscale;
return other;
}
void angular (AngularVector&) const;
};
struct AngularVector {
double azi;
double ele;
double length;
AngularVector () : azi(0.0), ele(0.0), length (0.0) {}
AngularVector (double a, double e, double l = 1.0) : azi(a), ele(e), length (l) {}
AngularVector operator- (const AngularVector& other) const {
AngularVector r;
r.azi = azi - other.azi;
r.ele = ele - other.ele;
r.length = length - other.length;
return r;
}
AngularVector operator+ (const AngularVector& other) const {
AngularVector r;
r.azi = azi + other.azi;
r.ele = ele + other.ele;
r.length = length + other.length;
return r;
}
bool operator== (const AngularVector& other) const {
return fabs (azi - other.azi) <= FLT_EPSILON &&
fabs (ele - other.ele) <= FLT_EPSILON &&
fabs (length - other.length) <= FLT_EPSILON;
}
bool operator!= (const AngularVector& other) const {
return fabs (azi - other.azi) > FLT_EPSILON ||
fabs (ele - other.ele) > FLT_EPSILON ||
fabs (length - other.length) > FLT_EPSILON;
}
void cartesian (CartesianVector& c) const {
azi_ele_to_cart (azi, ele, c.x, c.y, c.z);
}
};
inline
void CartesianVector::angular (AngularVector& a) const {
cart_to_azi_ele (x, y, z, a.azi, a.ele);
}
}
#endif /* __libpbd_cartesian_h__ */
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