seadQuatCalcCommon.hpp

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#pragma once
 
#include <math/seadMathCalcCommon.h>
#include <math/seadQuat.h>
 
namespace sead {
 
template <typename T>
inline void
QuatCalcCommon<T>::makeUnit(Base& q)
{
    q = Quat<T>::unit;
}
 
template <typename T>
bool QuatCalcCommon<T>::makeVectorRotation(Base& q, const Vec3& from, const Vec3& to)
{
    Vec3 cross;
    Vector3CalcCommon<T>::cross(cross, from, to);
    const T dot = Vector3CalcCommon<T>::dot(from, to) + 1;
 
    if (dot <= MathCalcCommon<T>::epsilon())
    {
        makeUnit(q);
        return false;
    }
    else
    {
        T v1 = MathCalcCommon<T>::sqrt(2 * dot);
        T v2 = 1 / v1;
        set(q, v1 * 0.5f,
               cross.x * v2, cross.y * v2, cross.z * v2);
    }
 
    return true;
}
 
template <typename T>
inline void
QuatCalcCommon<T>::set(Base& q, T w, T x, T y, T z)
{
    q.w = w;
    q.x = x;
    q.y = y;
    q.z = z;
}
 
} // namespace sead