shz_quat_squad

SHZ_INLINE shz_quat_t shz_quat_squad(shz_quat_t q1, shz_quat_t q2, shz_quat_t s1, shz_quat_t s2, float t) SHZ_NOEXCEPT;

Evaluates a smooth cubic spherical interpolation (SQUAD) at parameter t.

Parameters

Name	Type	Description
q1	shz_quat_t	Start quaternion.
q2	shz_quat_t	End quaternion.
s1	shz_quat_t	Inner control point for q1 (typically computed from surrounding keyframes).
s2	shz_quat_t	Inner control point for q2 (typically computed from surrounding keyframes).
t	float	Interpolation factor in [0, 1].

Returns

Resulting interpolated quaternion

Notes

• SQUAD(q1, q2, s1, s2, t) = slerp(slerp(q1, q2, t), slerp(s1, s2, t), 2t(1-t))

Availability

• C++ equivalent: shz::quat::squad
• Type-generic form: none
• Back-ends: SH4: shared C implementation · SW: portable C · SPU: shared C implementation
• Defined in: sh4zam/shz_quat.h:143
• Module: Quaternion, section "Initialization"