The open source OpenXR runtime
a/math: Add math_quat_dot()
Add a function to compute the dot product of 2 quaternions
Part-of: <https://gitlab.freedesktop.org/monado/monado/-/merge_requests/2188>
authored by
Jan Schmidt
and committed by
Marge Bot
ab5b21de
36eaad64
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src/xrt/auxiliary/math/m_api.h
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src/xrt/auxiliary/math/m_api.h
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math_quat_len(const struct xrt_quat *quat);
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/*!
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* The dot product of 2 quaternions. It has a analogous interpretation
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* as for vec3. For unit quaternions, it provides cos(theta) of the
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* angle between the 2 quaternion rotations.
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*
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* @relates xrt_quat
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* @ingroup aux_math
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*/
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static inline float
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math_quat_dot(const struct xrt_quat *l, const struct xrt_quat *r)
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{
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return l->x * r->x + l->y * r->y + l->z * r->z + l->w * r->w;
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}
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/*!
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* Normalize a quaternion.
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*
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* @relates xrt_quat