goat3d: libs/vmath/sphvec.cc annotate

goat3d

ops, screwed up the GOAT3DAPI define

author	John Tsiombikas <nuclear@member.fsf.org>
date	Thu, 05 Dec 2013 18:49:19 +0200
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rev	line source
nuclear@27	1 #include "sphvec.h"
nuclear@27	2 #include "vector.h"
nuclear@27	3
nuclear@27	4 /* theta: 0 <= theta <= 2pi, the angle around Y axis.
nuclear@27	5 * phi: 0 <= phi <= pi, the angle from Y axis.
nuclear@27	6 * r: radius.
nuclear@27	7 */
nuclear@27	8 SphVector::SphVector(scalar_t theta, scalar_t phi, scalar_t r) {
nuclear@27	9 this->theta = theta;
nuclear@27	10 this->phi = phi;
nuclear@27	11 this->r = r;
nuclear@27	12 }
nuclear@27	13
nuclear@27	14 /* Constructs a spherical coordinate vector from a cartesian vector */
nuclear@27	15 SphVector::SphVector(const Vector3 &cvec) {
nuclear@27	16 *this = cvec;
nuclear@27	17 }
nuclear@27	18
nuclear@27	19 /* Assignment operator that converts cartesian to spherical coords */
nuclear@27	20 SphVector &SphVector::operator =(const Vector3 &cvec) {
nuclear@27	21 r = cvec.length();
nuclear@27	22 //theta = atan2(cvec.y, cvec.x);
nuclear@27	23 theta = atan2(cvec.z, cvec.x);
nuclear@27	24 //phi = acos(cvec.z / r);
nuclear@27	25 phi = acos(cvec.y / r);
nuclear@27	26 return *this;
nuclear@27	27 }