Method UpdateStarfield

TombEngine/Game/effects/weather.cpp:233–323

	}

	void EnvironmentController::UpdateStarfield(const ScriptInterfaceLevel& level)
	{
		int starCount = level.GetStarfieldStarCount();
		if (starCount == 0)
			return;

		if (ResetStarField)
		{
			Stars.clear();
			ResetStarField = false;
		}

		if (starCount != Stars.size())
		{
			// If starCount increased, add new stars to existing list.
			if (starCount > Stars.size())
			{
				// Reserve space for new stars if necessary.
				Stars.reserve(starCount);

				for (int i = (int)Stars.size(); i < starCount; i++)
				{
					auto starDir = Random::GenerateDirectionInCone(-Vector3::UnitY, 70.0f);
					starDir.Normalize();

					auto star = StarParticle{};
					star.Direction = starDir;
					star.Color = Vector3(
						Random::GenerateFloat(0.6f, 1.0f),
						Random::GenerateFloat(0.6f, 1.0f),
						Random::GenerateFloat(0.6f, 1.0f));
					star.Scale = Random::GenerateFloat(0.5f, 1.5f);

					float cosine = Vector3::UnitY.Dot(starDir);
					float maxCosine = cos(DEG_TO_RAD(50.0f));
					float minCosine = cos(DEG_TO_RAD(70.0f));

					if (cosine >= minCosine && cosine <= maxCosine)
					{
						star.Extinction = (cosine - minCosine) / (maxCosine - minCosine);
					}
					else
					{
						star.Extinction = 1.0f;
					}

					Stars.push_back(star);
				}
			}
			// If starCount decreased, resize vector without reinitializing.
			else
			{
				Stars.resize(starCount);
			}

		}

		for (auto& star : Stars)