Function xMat4x3OrthoInv

src/SB/Core/x/xCollide.cpp:2561–2567

    if (len >= -0.0000099999997f && len <= 0.0000099999997f)
    {
        mat = g_I3;
        len = 0.0f;
    }
    else
    {
        mat.at = at;
        mat.at *= 1.0f / len;
        F32 absx = xabs(mat.at.x);
        F32 absy = xabs(mat.at.y);
        F32 absz = xabs(mat.at.z);