1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/libs/vmath/quat.h	Sun May 31 00:40:26 2015 +0300
     1.3 @@ -0,0 +1,114 @@
     1.4 +/*
     1.5 +libvmath - a vector math library
     1.6 +Copyright (C) 2004-2015 John Tsiombikas <nuclear@member.fsf.org>
     1.7 +
     1.8 +This program is free software: you can redistribute it and/or modify
     1.9 +it under the terms of the GNU Lesser General Public License as published
    1.10 +by the Free Software Foundation, either version 3 of the License, or
    1.11 +(at your option) any later version.
    1.12 +
    1.13 +This program is distributed in the hope that it will be useful,
    1.14 +but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.15 +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    1.16 +GNU Lesser General Public License for more details.
    1.17 +
    1.18 +You should have received a copy of the GNU Lesser General Public License
    1.19 +along with this program.  If not, see <http://www.gnu.org/licenses/>.
    1.20 +*/
    1.21 +
    1.22 +#ifndef VMATH_QUATERNION_H_
    1.23 +#define VMATH_QUATERNION_H_
    1.24 +
    1.25 +#include <stdio.h>
    1.26 +#include "vmath_types.h"
    1.27 +#include "vector.h"
    1.28 +
    1.29 +#ifdef __cplusplus
    1.30 +extern "C" {
    1.31 +#endif	/* __cplusplus */
    1.32 +
    1.33 +#define quat_cons(s, x, y, z)	v4_cons(x, y, z, s)
    1.34 +#define quat_vec(q)				v3_cons((q).x, (q).y, (q).z)
    1.35 +#define quat_s(q)				((q).w)
    1.36 +#define quat_identity()			quat_cons(1.0, 0.0, 0.0, 0.0)
    1.37 +void quat_print(FILE *fp, quat_t q);
    1.38 +
    1.39 +#define quat_add		v4_add
    1.40 +#define quat_sub		v4_sub
    1.41 +#define quat_neg		v4_neg
    1.42 +
    1.43 +static inline quat_t quat_mul(quat_t q1, quat_t q2);
    1.44 +
    1.45 +static inline quat_t quat_conjugate(quat_t q);
    1.46 +
    1.47 +#define quat_length		v4_length
    1.48 +#define quat_length_sq	v4_length_sq
    1.49 +
    1.50 +#define quat_normalize	v4_normalize
    1.51 +static inline quat_t quat_inverse(quat_t q);
    1.52 +
    1.53 +quat_t quat_rotate(quat_t q, scalar_t angle, scalar_t x, scalar_t y, scalar_t z);
    1.54 +quat_t quat_rotate_quat(quat_t q, quat_t rotq);
    1.55 +
    1.56 +static inline void quat_to_mat3(mat3_t res, quat_t q);
    1.57 +static inline void quat_to_mat4(mat4_t res, quat_t q);
    1.58 +
    1.59 +#define quat_lerp quat_slerp
    1.60 +quat_t quat_slerp(quat_t q1, quat_t q2, scalar_t t);
    1.61 +
    1.62 +
    1.63 +#ifdef __cplusplus
    1.64 +}	/* extern "C" */
    1.65 +
    1.66 +/* Quaternion */
    1.67 +class Quaternion {
    1.68 +public:
    1.69 +	scalar_t s;
    1.70 +	Vector3 v;
    1.71 +
    1.72 +	Quaternion();
    1.73 +	Quaternion(scalar_t s, const Vector3 &v);
    1.74 +	Quaternion(scalar_t s, scalar_t x, scalar_t y, scalar_t z);
    1.75 +	Quaternion(const Vector3 &axis, scalar_t angle);
    1.76 +	Quaternion(const quat_t &quat);
    1.77 +
    1.78 +	Quaternion operator +(const Quaternion &quat) const;
    1.79 +	Quaternion operator -(const Quaternion &quat) const;
    1.80 +	Quaternion operator -() const;
    1.81 +	Quaternion operator *(const Quaternion &quat) const;
    1.82 +
    1.83 +	void operator +=(const Quaternion &quat);
    1.84 +	void operator -=(const Quaternion &quat);
    1.85 +	void operator *=(const Quaternion &quat);
    1.86 +
    1.87 +	void reset_identity();
    1.88 +
    1.89 +	Quaternion conjugate() const;
    1.90 +
    1.91 +	scalar_t length() const;
    1.92 +	scalar_t length_sq() const;
    1.93 +
    1.94 +	void normalize();
    1.95 +	Quaternion normalized() const;
    1.96 +
    1.97 +	Quaternion inverse() const;
    1.98 +
    1.99 +	void set_rotation(const Vector3 &axis, scalar_t angle);
   1.100 +	void rotate(const Vector3 &axis, scalar_t angle);
   1.101 +	/* note: this is a totally different operation from the above
   1.102 +	 * this treats the quaternion as signifying direction and rotates
   1.103 +	 * it by a rotation quaternion by rot * q * rot'
   1.104 +	 */
   1.105 +	void rotate(const Quaternion &q);
   1.106 +
   1.107 +	Matrix3x3 get_rotation_matrix() const;
   1.108 +};
   1.109 +
   1.110 +Quaternion slerp(const Quaternion &q1, const Quaternion &q2, scalar_t t);
   1.111 +inline Quaternion lerp(const Quaternion &q1, const Quaternion &q2, scalar_t t);
   1.112 +
   1.113 +#endif	/* __cplusplus */
   1.114 +
   1.115 +#include "quat.inl"
   1.116 +
   1.117 +#endif	/* VMATH_QUATERNION_H_ */