*r = *a;
}
+static inline float ao_quaternion_dot(const struct ao_quaternion *a,
+ const struct ao_quaternion *b)
+{
+#define T(_a) (((a)->_a) * ((b)->_a))
+ return T(r) + T(x) + T(y) + T(z);
+#undef T
+}
+
+
static inline void ao_quaternion_rotate(struct ao_quaternion *r,
const struct ao_quaternion *a,
const struct ao_quaternion *b)