added libanim, and moved gph-cmath into libs/cgmath

[dosdemo] / src / cgmath / cgmquat.inl

diff --git a/src/cgmath/cgmquat.inl b/src/cgmath/cgmquat.inl
deleted file mode 100644 (file)
index 4b29fd2..0000000
--- a/src/cgmath/cgmquat.inl
+++ /dev/null
@@ -1,159 +0,0 @@
-/* gph-cmath - C graphics math library
- * Copyright (C) 2018 John Tsiombikas <nuclear@member.fsf.org>
- *
- * This program is free software. Feel free to use, modify, and/or redistribute
- * it under the terms of the MIT/X11 license. See LICENSE for details.
- * If you intend to redistribute parts of the code without the LICENSE file
- * replace this paragraph with the full contents of the LICENSE file.
- */
-static inline void cgm_qcons(cgm_quat *q, float x, float y, float z, float w)
-{
-       q->x = x;
-       q->y = y;
-       q->z = z;
-       q->w = w;
-}
-
-
-static inline void cgm_qneg(cgm_quat *q)
-{
-       q->x = -q->x;
-       q->y = -q->y;
-       q->z = -q->z;
-       q->w = -q->w;
-}
-
-static inline void cgm_qadd(cgm_quat *a, const cgm_quat *b)
-{
-       a->x += b->x;
-       a->y += b->y;
-       a->z += b->z;
-       a->w += b->w;
-}
-
-static inline void cgm_qsub(cgm_quat *a, const cgm_quat *b)
-{
-       a->x -= b->x;
-       a->y -= b->y;
-       a->z -= b->z;
-       a->w -= b->w;
-}
-
-static inline void cgm_qmul(cgm_quat *a, const cgm_quat *b)
-{
-       float x, y, z, dot;
-       cgm_vec3 cross;
-
-       dot = a->x * b->x + a->y * b->y + a->z * b->z;
-       cgm_vcross(&cross, (cgm_vec3*)a, (cgm_vec3*)b);
-
-       x = a->w * b->x + b->w * a->x + cross.x;
-       y = a->w * b->y + b->w * a->y + cross.y;
-       z = a->w * b->z + b->w * a->z + cross.z;
-       a->w = a->w * b->w - dot;
-       a->x = x;
-       a->y = y;
-       a->z = z;
-}
-
-static inline float cgm_qlength(const cgm_quat *q)
-{
-       return sqrt(q->x * q->x + q->y * q->y + q->z * q->z + q->w * q->w);
-}
-
-static inline float cgm_qlength_sq(const cgm_quat *q)
-{
-       return q->x * q->x + q->y * q->y + q->z * q->z + q->w * q->w;
-}
-
-static inline void cgm_qnormalize(cgm_quat *q)
-{
-       float len = cgm_qlength(q);
-       if(len != 0.0f) {
-               float s = 1.0f / len;
-               q->x *= s;
-               q->y *= s;
-               q->z *= s;
-               q->w *= s;
-       }
-}
-
-static inline void cgm_qconjugate(cgm_quat *q)
-{
-       q->x = -q->x;
-       q->y = -q->y;
-       q->z = -q->z;
-}
-
-static inline void cgm_qinvert(cgm_quat *q)
-{
-       float len_sq = cgm_qlength_sq(q);
-       cgm_qconjugate(q);
-       if(len_sq != 0.0f) {
-               float s = 1.0f / len_sq;
-               q->x *= s;
-               q->y *= s;
-               q->z *= s;
-               q->w *= s;
-       }
-}
-
-static inline void cgm_qrotation(cgm_quat *q, const cgm_vec3 *axis, float angle)
-{
-       float hangle = angle * 0.5f;
-       float sin_ha = sin(hangle);
-       q->w = cos(hangle);
-       q->x = axis->x * sin_ha;
-       q->y = axis->y * sin_ha;
-       q->z = axis->z * sin_ha;
-}
-
-static inline void cgm_qrotate(cgm_quat *q, const cgm_vec3 *axis, float angle)
-{
-       cgm_quat qrot;
-       cgm_qrotation(&qrot, axis, angle);
-       cgm_qmul(q, &qrot);
-}
-
-static inline void cgm_qslerp(cgm_quat *res, const cgm_quat *quat1, const cgm_quat *q2, float t)
-{
-       float angle, dot, a, b, sin_angle;
-       cgm_quat q1 = *quat1;
-
-       dot = quat1->x * q2->x + quat1->y * q2->y + quat1->z * q2->z + quat1->w * q2->w;
-       if(dot < 0.0f) {
-               /* make sure we inteprolate across the shortest arc */
-               cgm_qneg(&q1);
-               dot = -dot;
-       }
-
-       /* clamp dot to [-1, 1] in order to avoid domain errors in acos due to
-        * floating point imprecisions
-        */
-       if(dot < -1.0f) dot = -1.0f;
-       if(dot > 1.0f) dot = 1.0f;
-       angle = acos(dot);
-
-       sin_angle = sin(angle);
-       if(sin_angle == 0.0f) {
-               /* use linear interpolation to avoid div/zero */
-               a = 1.0f;
-               b = t;
-       } else {
-               a = sin((1.0f - t) * angle) / sin_angle;
-               b = sin(t * angle) / sin_angle;
-       }
-
-       res->x = q1.x * a + q2->x * b;
-       res->y = q1.y * a + q2->y * b;
-       res->z = q1.z * a + q2->z * b;
-       res->w = q1.w * a + q2->w * b;
-}
-
-static inline void cgm_qlerp(cgm_quat *res, const cgm_quat *a, const cgm_quat *b, float t)
-{
-       res->x = a->x + (b->x - a->x) * t;
-       res->y = a->y + (b->y - a->y) * t;
-       res->z = a->z + (b->z - a->z) * t;
-       res->w = a->w + (b->w - a->w) * t;
-}