360 degrees spinnable object from a photographed real object

Question

I want to create the ability to spin a photographed object 360 degrees.

• It spins endlessly based on the speed you \"flick\" .
• You spin it left or rig

Answer 1

Here is the second draft of my answer that shows off the basic functionality of a simple sprite animation:

class GameScene: SKScene {

  // Left spin is ascending indices, right spin is descending indices.
  var initialTextures = [SKTexture]()

  // Reset then reload this from 0-6 with the correct image sequences from initialTextures:
  var nextTextures = [SKTexture]()

  var sprite = SKSpriteNode()

  // Use gesture recognizer or other means to set how fast the spin should be.
  var velocity = TimeInterval(0.1)

  enum Direction { case left, right }

  func spin(direction: Direction, timePerFrame: TimeInterval) {

    nextTextures = []
    for _ in 0...6 {

      var index = initialTextures.index(of: sprite.texture!)

      // Left is ascending, right is descending:
      switch direction {
      case .left:
        if index == (initialTextures.count - 1) { index = 0 } else { index! += 1 }
      case .right:
        if index == 0 { index = (initialTextures.count - 1) } else { index! -= 1 }
      }

      let nextTexture = initialTextures[index!]
      nextTextures.append(nextTexture)
      sprite.texture = nextTexture
    }

    let action = SKAction.repeatForever(.animate(with: nextTextures, timePerFrame: timePerFrame))
    sprite.run(action)
  }

  override func didMove(to view: SKView) {
    removeAllChildren()

    // Make our textures for spinning:
    for i in 0...6 {
      initialTextures.append(SKTexture(imageNamed: "img_\(i)"))
    }
    nextTextures = initialTextures

    sprite.texture = nextTextures.first!
    sprite.size = nextTextures.first!.size()
    addChild(sprite)
    spin(direction: .left, timePerFrame: 0.10)
  }

  override func touchesBegan(_ touches: Set, with event: UIEvent?) {
    spin(direction: .right, timePerFrame: velocity)
  }

  override func touchesEnded(_ touches: Set, with event: UIEvent?) {
    spin(direction: .left, timePerFrame: velocity)
  }
}

---

Right now you just click / release to alternate right left.

Todo for next draft:
- Implement gesture recognizer for velocity
- Implement decay if wanted (so it will slow down over time)

(Old video, new code does not reset frame to 0):

Image assets are found here for the animation: https://drive.google.com/open?id=0B3OoSBYuhlkgaGRtbERfbHVWb28