game-assets

Game Asset Management

Downloading Assets

Use nw_download_asset to download sprites, backgrounds, textures, sounds, and 3D models from free CC0 sources:

nw_download_asset:
  project_dir: /path/to/project
  app_name: MyGame
  url: https://example.com/sprite.png   (HTTPS only)
  asset_name: paddle                     (becomes Assets.xcassets/paddle.imageset/)
  asset_kind: sprite | background | texture | sound | model

After download, use in SpriteKit:

let texture = SKTexture(imageNamed: "paddle")
let sprite = SKSpriteNode(texture: texture)

After download, use in SceneKit (3D models):

let scene = SCNScene(named: "car.usdz")!
let modelNode = scene.rootNode.childNodes.first!

Trusted free sources:

• 2D: Kenney.nl (CC0), OpenGameArt.org (mixed CC0/CC-BY), GitHub game asset repos
• 3D: Sketchfab (CC0/CC-BY USDZ/OBJ), Poly Pizza (CC0), Kenney.nl 3D assets (CC0 OBJ/DAE)

Procedural Asset Generation

Generate sprites in code — no external files needed:

import UIKit
import SpriteKit

class TextureFactory {
    static func circle(diameter: CGFloat, color: UIColor) -> SKTexture {
        let renderer = UIGraphicsImageRenderer(size: CGSize(width: diameter, height: diameter))
        let image = renderer.image { ctx in
            color.setFill()
            ctx.cgContext.fillEllipse(in: CGRect(x: 0, y: 0, width: diameter, height: diameter))
        }
        return SKTexture(image: image)
    }

    static func roundedRect(size: CGSize, color: UIColor, cornerRadius: CGFloat = 8) -> SKTexture {
        let renderer = UIGraphicsImageRenderer(size: size)
        let image = renderer.image { ctx in
            color.setFill()
            UIBezierPath(roundedRect: CGRect(origin: .zero, size: size), cornerRadius: cornerRadius).fill()
        }
        return SKTexture(image: image)
    }

    static func gradient(size: CGSize, colors: [UIColor]) -> SKTexture {
        let renderer = UIGraphicsImageRenderer(size: size)
        let image = renderer.image { ctx in
            let cgColors = colors.map { $0.cgColor } as CFArray
            let gradient = CGGradient(colorsSpace: CGColorSpaceCreateDeviceRGB(), colors: cgColors, locations: nil)!
            ctx.cgContext.drawLinearGradient(gradient,
                start: .zero, end: CGPoint(x: 0, y: size.height),
                options: [])
        }
        return SKTexture(image: image)
    }
}