Function GetRoomLosCollision

TombEngine/Game/collision/Los.cpp:277–423

	}

	RoomLosCollisionData GetRoomLosCollision(const Vector3& origin, int roomNumber, const Vector3& dir, float dist, bool collideBridges)
	{
		constexpr auto PORTAL_THRESHOLD = 0.001f;

		// FAILSAFE.
		if (dir == Vector3::Zero)
		{
			TENLog("GetRoomLosCollision(): Direction is not a unit vector.", LogLevel::Warning);
			return {};
		}

		auto roomLos = RoomLosCollisionData{};

		// 1) Define ray.
		auto ray = Ray(origin, dir);
		float rayDist = dist;
		int rayRoomNumber = roomNumber;

		// 2) Traverse rooms.
		bool traversePortal = true;
		while (traversePortal)
		{
			auto closestTri = std::optional<CollisionTriangleData>();
			float closestDist = rayDist;
			int portalRoomNumber = NO_VALUE;

			// 2.1) Clip room.
			const auto& room = g_Level.Rooms[rayRoomNumber];
			auto meshColl = room.CollisionMesh.GetCollision(ray, closestDist);
			if (meshColl.has_value())
			{
				closestTri = meshColl->Triangle;
				closestDist = meshColl->Distance;
			}

			// 2.2) Clip doors.
			auto doorItemNumbers = room.Doors.GetBoundedIds(ray, closestDist);
			for (int doorItemNumber : doorItemNumbers)
			{
				const auto& doorItem = g_Level.Items[doorItemNumber];
				const auto& door = GetDoorObject(doorItem);

				auto doorMeshColl = door.CollisionMesh.GetCollision(ray, closestDist);
				if (doorMeshColl.has_value())
				{
					closestTri = doorMeshColl->Triangle;
					closestDist = doorMeshColl->Distance;
				}
			}

			// 2.3) Clip bridge (if applicable).
			if (collideBridges)
			{
				// Run through neighbor rooms.
				for (int neighborRoomNumber : room.NeighborRoomNumbers)
				{
					const auto& neighborRoom = g_Level.Rooms[neighborRoomNumber];