public static void Generate(Domain domain, uint numRocks)
        {
            var mapSize          = Settings.MAP_SIZE;
            var boundarySize     = 800;
            var boundaryPosition = mapSize * 0.5 + boundarySize * 0.5;

            // Create boundaries
            {
                EntityUtility.CreateBoundary(domain, -boundaryPosition, 0, boundarySize, mapSize * 2);
                EntityUtility.CreateBoundary(domain, boundaryPosition, 0, boundarySize, mapSize * 2);
                EntityUtility.CreateBoundary(domain, 0, -boundaryPosition, mapSize * 2, boundarySize);
                EntityUtility.CreateBoundary(domain, 0, boundaryPosition, mapSize * 2, boundarySize);
            }


            // Generate rocks
            var rockMargin        = 0.1;
            var rockSpawnBoundary = mapSize * (0.5 - rockMargin);

            for (uint i = 0; i < numRocks; i++)
            {
                Rock   rock     = new Rock();
                double x        = RandomGenerator.Double(-rockSpawnBoundary, rockSpawnBoundary);
                double y        = RandomGenerator.Double(-rockSpawnBoundary, rockSpawnBoundary);
                double scale    = RandomGenerator.Double(0.5, 1.5);
                double rotation = RandomGenerator.Double(0, 360);
                rock.SetAttributes(x, y, scale, rotation);

                while (!rock.CheckDistance())
                {
                    x += 10;
                    y += 10;
                    rock.SetAttributes(x, y, scale, rotation);
                }

                Rock.all.Add(rock);
            }

            foreach (Rock rockElement in Rock.all)
            {
                EntityUtility.CreateRock(domain, rockElement.x, rockElement.y, rockElement.scale, rockElement.rotation);
            }
        }