Function AngleBetween

SampleFramework11/v1.02/Graphics/Skybox.cpp:22–25

{

static float AngleBetween(const Float3& dir0, const Float3& dir1)
{
    return std::acos(std::max(Float3::Dot(dir0, dir1), 0.00001f));
}

void SkyCache::Init(Float3 sunDirection, Float3 groundAlbedo, float turbidity)
{