Sample Xcode 13 project using a Sprite Atlas inside an Assets Catalog.
- When using the
SKTextureAtlas(named:)initializer to load the texture atlas from data stored in the app bundle, the draw calls are not batched. - When using the
SKTextureAtlas(dictionary:)initializer to create a texture atlas from a set of image files, the draw calls are batched.
Related questions:
- https://stackoverflow.com/questions/69957326/spritekit-draw-calls-not-batched-when-using-a-texture-atlas-from-data-stored-in
- https://developer.apple.com/forums/thread/694641
Here, there are 2 draw calls, one for each sprite node:
Here, there is only 1 draw call, batched:
The SpriteAtlas in the Assets Catalog:
The code is very simple, in GameScene.swift:
import SpriteKit
class GameScene: SKScene {
override func didMove(to view: SKView) {
let atlas = SKTextureAtlas(named: "Sprites")
// let atlas = SKTextureAtlas(dictionary: ["costume": UIImage(named: "costume")!, "tank": UIImage(named: "tank")!])
let costume = SKSpriteNode(texture: atlas.textureNamed("costume"))
costume.setScale(0.3)
costume.position = CGPoint(x: 200, y: 650)
let tank = SKSpriteNode(texture: atlas.textureNamed("tank"))
tank.setScale(0.3)
tank.position = CGPoint(x: 500, y: 650)
addChild(costume)
addChild(tank)
}
}
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