Terrarium.Game.WorldState.FindOrganisms C# (CSharp) Method

        public ArrayList FindOrganisms(int x1, int x2, int y1, int y2)
        {
            int minX, maxX, minY, maxY;
            if (x1 < x2)
            {
                minX = x1;
                maxX = x2;
            }
            else
            {
                minX = x2;
                maxX = x1;
            }

            if (y1 < y2)
            {
                minY = y1;
                maxY = y2;
            }
            else
            {
                minY = y2;
                maxY = y1;
            }

            if (minX < 0)
            {
                minX = 0;
            }
            if (maxX < 0)
            {
                maxX = 0;
            }
            if (minY < 0)
            {
                minY = 0;
            }
            if (maxY < 0)
            {
                maxY = 0;
            }

            minX >>= EngineSettings.GridWidthPowerOfTwo;
            if (minX > _gridWidth - 1)
            {
                minX = _gridWidth - 1;
            }

            maxX >>= EngineSettings.GridWidthPowerOfTwo;
            if (maxX > _gridWidth - 1)
            {
                maxX = _gridWidth - 1;
            }

            minY >>= EngineSettings.GridHeightPowerOfTwo;
            if (minY > _gridHeight - 1)
            {
                minY = _gridHeight - 1;
            }

            maxY >>= EngineSettings.GridHeightPowerOfTwo;
            if (maxY > _gridHeight - 1)
            {
                maxY = _gridHeight - 1;
            }

            return FindOrganismsInCells(minX, maxX, minY, maxY);
        }