If you combine multiple images into one texture - called a texture atlas - instead of having multiple draw calls, there’s only one, which is more efficient. When your game is rendered, SpriteKit will make a “draw call” on the GPU for each and every texture you send it. The advantage of using texture atlases is performance. Texture atlases look and behave just like a folder. The tile images are in texture atlases instead of folders. It includes all of the tile and sprite images you’ll need for this tutorial. The starter project has an asset catalog named Assets.xcassets. Managing Your Images in the Asset Catalog This is a great site with tons of tiles and other sprites available. Fortunately, there are a few free asset sites that developers can use. Tile map art is an art form all of its own. To create a tile map, you’ll first need some tile images. Later, you’ll create a new tile map in code with the objects that the car needs to collect. In Rubber Duckie Rescue, you’ll first paint two simple background tile maps with grass and water, replacing the current gray background. Sid Meier’s Civilization moved with great visual effect from an isometric grid in Civ 4 to a hexagonal grid in Civ 5. This is an example of a pointy hexagon tile grid: There are two ways of placing hexagons: with the point on top or the flat side on top. Isometric tiles are a diamond shape as in Ravenwood Fair. This a top down game, but you can also use grid tiles for a side scroller. You choose the tile set depending on the style of your game. There are four types of Tile Sets you can create: grid, isometric, hexagonal pointy or hexagonal flat. You’ll also create a tiled area with ducks placed randomly for the car to rescue. In this tutorial, you’ll be making the background environment using grass and water tiles that have different effects on the car’s movement. This means you know exactly on which tile your character is currently standing. Flexibility: Each tile can be addressed in code.Smaller tiles can be repeated, and take up fewer resources. Performance: Aside from the convenience of painting tiles, performance will be improved.To change from summer to winter, just replace the lush verdant grass layer with a desolate brown layer. You can place a village on one tiled layer and grass on a lower layer. It’s easy to place individual tiles and amazingly easy to paint a whole background in seconds. Now you place one SKTileMapNode, and then paint it with tiles.
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