SKTileMap getting Values from GKNoiseMap

Question

ive been following the Apple Docs on GKNoiseMaps and i managed to get an image to spawn and it looks really good

using this code here

class GameScene: SKScene {


class Noise: GKNoise {
    var NoiseSource = GKPerlinNoiseSource(frequency: 0.05, octaveCount: 3, persistence: 1, lacunarity: 1, seed: Int32(arc4random_uniform(UInt32(500 - 1))))
    override init(_ noiseSource: GKNoiseSource, gradientColors: [NSNumber : UIColor]) {
        super.init(NoiseSource, gradientColors: [ (+1.0 as NSNumber): UIColor.red, (-1.0 as NSNumber) : UIColor.black])
    }
}
let noise = Noise()
let Vector1 = vector_double2(1.0, 1.0)

override func didMove(to view: SKView) {
    let NoiseMap = GKNoiseMap(noise, size: vector_double2(300.0, 300.0),
                              origin: vector_double2(0.0, 0.0),
                              sampleCount: vector_int2(100),
                              seamless: true)
    let texture = SKTexture(noiseMap: NoiseMap)
    let Node = SKSpriteNode(texture: texture)

    Node.size = CGSize(width: 1000,height: 1000)
    Node.position = CGPoint(x: 0,y: 0)
    self.addChild(Node)
}

    override func update(_ currentTime: TimeInterval) {
        // Called before each frame is rendered
    }
}

now how do i create a SKTileMap with this updated code here

class GameScene: SKScene {


class Noise: GKNoise {
    var NoiseSource = GKPerlinNoiseSource(frequency: 0.05, octaveCount: 3, persistence: 1, lacunarity: 1, seed: Int32(arc4random_uniform(UInt32(500 - 1))))
    override init(_ noiseSource: GKNoiseSource, gradientColors: [NSNumber : UIColor]) {
        super.init(NoiseSource, gradientColors: [(+1.0 as NSNumber): UIColor.red, (-1.0 as NSNumber) : UIColor.black])
    }
}
let noise = Noise()
let Vector1 = vector_double2(1.0, 1.0)

override func didMove(to view: SKView) {
    let NoiseMap = GKNoiseMap(noise, size: vector_double2(300.0, 300.0),
                              origin: vector_double2(0.0, 0.0),
                              sampleCount: vector_int2(100),
                              seamless: true)
    let tileGroup = [SKTileGroup]()
    let tileSet = SKTileSet(tileGroups: tileGroup)
    let map = SKTileMapNode(tileSet: tileSet, columns: 10, rows: 10, tileSize: CGSize(width: 20,height: 20), tileGroupLayout: tileGroup)
}

    override func update(_ currentTime: TimeInterval) {
        // Called before each frame is rendered
    }
}

and generate the SKTileMap with values from the GKNoiseMap as stated in the Apple Docs?

any help would be appreciated as i dont really know about SKTileMaps and how they work

Answer 1

You can create an SKTileDefinition using the texture created from the NoiseMap. Then it's possible to paint this tile into the SKTileMapNode at any location. This example iterates through all columns and rows and sets the tile. I made the size of the NoiseMap 64 x 64 since that is a typical size for a tile.

override func sceneDidLoad() {
    let noise = Noise()
    let noiseMap = GKNoiseMap(noise, size: vector_double2(64.0, 64.0), origin: vector_double2(0.0, 0.0), sampleCount: vector_int2(100), seamless: true)
    let bgTexture = SKTexture(noiseMap: noiseMap)

    let bgDefinition = SKTileDefinition(texture: bgTexture, size: bgTexture.size())
    let bgGroup = SKTileGroup(tileDefinition: bgDefinition)
    bgGroup.name = "noiseTest"

    let tileSet = SKTileSet(tileGroups: [bgGroup])

    let bgNode = SKTileMapNode(tileSet: tileSet, columns: 10, rows: 10, tileSize: bgTexture.size())
    let tile = bgNode.tileSet.tileGroups.first(where: { $0.name == "noiseTest" })

    for column in 0 ..< bgNode.numberOfColumns {
        for row in 0 ..< bgNode.numberOfRows {
            bgNode.setTileGroup(tile, forColumn: column, row: row)
        }
    }

    bgNode.position = CGPoint(x: 0, y: 0)
    bgNode.setScale(1)

    self.addChild(bgNode)
}