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annotate libs/vmath/sphvec.cc @ 17:aef7f51f6397
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| author | John Tsiombikas <nuclear@member.fsf.org> |
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| date | Wed, 10 Jun 2015 06:56:27 +0300 |
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| children |
| rev | line source |
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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 } |