/// <summary>
        /// Draws lines representing entity paths.
        /// </summary>
        private void DrawLines()
        {
            if (drawn)
            {
                RemoveLines();
            }
            drawn = true;

            List <Vector3> playerPositions;

            List <Vector3>[] lemmingPositions;
            if (logFile == null)
            {
                playerPositions  = logger.playerPositions;
                lemmingPositions = logger.lemmingPositions;
            }
            else
            {
                string logText = logFile.text;

                int currentIndex = InputUtil.GetIndexAfter(logText, "Player:\n");
                playerPositions = InputUtil.ParseVectorList(logText, ref currentIndex);

                List <List <Vector3> > lemmingPositionsList = new List <List <Vector3> >();
                while (currentIndex < logText.Length && logText[currentIndex] == 'L')
                {
                    currentIndex = logText.IndexOf('(', currentIndex);
                    lemmingPositionsList.Add(InputUtil.ParseVectorList(logText, ref currentIndex));
                }

                int numLemmings = lemmingPositionsList.Count;
                lemmingPositions = new List <Vector3> [numLemmings];
                for (int i = 0; i < numLemmings; i++)
                {
                    lemmingPositions[i] = lemmingPositionsList[i];
                }
            }

            DrawLine(playerPositions, playerPathColor, true);
            if (lemmingPositions != null)
            {
                foreach (List <Vector3> lemmingPath in lemmingPositions)
                {
                    DrawLine(lemmingPath, lemmingPathColor);
                }
            }
        }