Function stVec2QtUpdate

src/Sato/stMath.cpp:205–223

}

void stVec2QtUpdate(Quaternion &p, Quaternion &q, const TVec3f &dir, const TVec3f &vec)
{
    TVec3f crossp;
    crossp.cross(dir, vec);

    float length = stspeedy_sqrtf(2.0f * (1.0f + dir.dot(vec)));
    if (length > 0.0f)
    {
        Quaternion a;
        a.x = crossp.x / length;
        a.y = crossp.y / length;
        a.z = crossp.z / length;
        a.w = (0.5f * length);

        Quaternion c;
        stQtMult(&c, &a, &p);
        stQtNormalize(&q, &c);
    }
}

void stVec2QtUpdate(Quaternion &q, const Vec &dir, const Vec &vec)
{