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annotate libs/vmath/sphvec.cc @ 15:2d48f65da357

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author John Tsiombikas <nuclear@member.fsf.org>
date Sun, 07 Jun 2015 20:40:37 +0300
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nuclear@10 1 /*
nuclear@10 2 libvmath - a vector math library
nuclear@10 3 Copyright (C) 2004-2015 John Tsiombikas <nuclear@member.fsf.org>
nuclear@10 4
nuclear@10 5 This program is free software: you can redistribute it and/or modify
nuclear@10 6 it under the terms of the GNU Lesser General Public License as published
nuclear@10 7 by the Free Software Foundation, either version 3 of the License, or
nuclear@10 8 (at your option) any later version.
nuclear@10 9
nuclear@10 10 This program is distributed in the hope that it will be useful,
nuclear@10 11 but WITHOUT ANY WARRANTY; without even the implied warranty of
nuclear@10 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
nuclear@10 13 GNU Lesser General Public License for more details.
nuclear@10 14
nuclear@10 15 You should have received a copy of the GNU Lesser General Public License
nuclear@10 16 along with this program. If not, see <http://www.gnu.org/licenses/>.
nuclear@10 17 */
nuclear@10 18 #include "sphvec.h"
nuclear@10 19 #include "vector.h"
nuclear@10 20
nuclear@10 21 /* theta: 0 <= theta <= 2pi, the angle around Y axis.
nuclear@10 22 * phi: 0 <= phi <= pi, the angle from Y axis.
nuclear@10 23 * r: radius.
nuclear@10 24 */
nuclear@10 25 SphVector::SphVector(scalar_t theta, scalar_t phi, scalar_t r) {
nuclear@10 26 this->theta = theta;
nuclear@10 27 this->phi = phi;
nuclear@10 28 this->r = r;
nuclear@10 29 }
nuclear@10 30
nuclear@10 31 /* Constructs a spherical coordinate vector from a cartesian vector */
nuclear@10 32 SphVector::SphVector(const Vector3 &cvec) {
nuclear@10 33 *this = cvec;
nuclear@10 34 }
nuclear@10 35
nuclear@10 36 /* Assignment operator that converts cartesian to spherical coords */
nuclear@10 37 SphVector &SphVector::operator =(const Vector3 &cvec) {
nuclear@10 38 r = cvec.length();
nuclear@10 39 //theta = atan2(cvec.y, cvec.x);
nuclear@10 40 theta = atan2(cvec.z, cvec.x);
nuclear@10 41 //phi = acos(cvec.z / r);
nuclear@10 42 phi = acos(cvec.y / r);
nuclear@10 43 return *this;
nuclear@10 44 }