These are configured by changing the following parameters: Once you have set up your shape, you then need to define the basic physical properties that your object is to have. If you have a custom (polygon) mask, it must have a minimum of 3 and a maximum of 8 points to it, and it must be convex (see image below).If you have rectangular mask, then you can move any of the four corners, but the corresponding ones will adjust position automatically to always maintain a rectangle.If you have a circular mask, then you can only pull any of the path points to make the circle diameter larger or smaller.However, depending on the mask you have chosen, it can be rather more restrictive: This looks similar to the Path Editor, and functions in much the same way. Clicking on the Modify Collision Shape button will open the following chained window to edit the shape: We need to assign a collision shape to the object ourselves (this is properly called a fixture, see The Physics Functions for more information), which can either be a circle, a rectangle or a polygon shape that you yourself define. With the 'normal' collision system your collisions are based off of the mask of the sprite assigned to the object, but with physics enabled this is no longer the case. When you check this, the object resource window opens a new chained window for the physics editor:īefore you start to edit the values for the physics behaviours it's a good idea to first set the collision shape. See the section on the Room Editor Properties). Selecting this option will radically change the behaviour of your object when an instance of it is placed in a room, as this switches on the object's physical properties and means that its 'traditional' movement and collision functions are no longer valid (but only when the room it is placed on is also marked as being a physics room. Open GameScene.When you first create a new object resource, there is a check-box marked Uses Physics, which is not checked by default. To quote Josh, “Nodeness makes Sprite Kit awesome!” I don’t know about you, but the coolest thing in the app so far is the spinning spaceship that appears when the screen is tapped. In SpriteKit, scenes (implementations of SKScene) are represented as a tree structure, and the nodes of the tree are SKNodes. Looking into GameViewController.swift we see it overrides viewDidLoad, and sets up a SKScene. That’s pretty sweet, so what’s happening here, exactly? Well, we have a storyboard containing a single view controller whose custom class is GameViewController. Now you’ve made your first SpriteKit app-or maybe you could even consider it a “game”! If you run the app, you should see a ‘Hello World’ message, and clicking on the screen will create spinning spaceships.

In this tutorial I used iPad as my device, but it doesn’t matter too much. Give it a name, choose “Swift” for the language and (this is important) “SpriteKit” for the “Game Technology”. Setting up the PhysicsCup Projectįirst, open xCode 6+ and create a new project, selecting iOS -> Application -> Game. For those who are impatient or want to follow along, I’ve posted a github repo with the code. In this blog post, I’ll show you how (in Swift!). When you tilt and rotate your phone, the stars tumble around in an interesting and “realistic” way.Īfter Josh Smith’s gaming workshop, I realized how easy this neat visualization would be to implement in SpriteKit. you get a “star” that falls into a graphical representation of a cup. When you buy a cup of coffee via the app. In this post I’ll cover some major features of SK’s sprite rendering and physics engine by implementing a small iOS game! The ProjectĪ few months back a co-worker of mine, Matt Nedrich showed me the Starbucks iPhone App. The workshop featured Apple’s SpriteKit (SK), which was released two years ago and is a very powerful 2D gaming framework that also includes a great, easy to use, physics engine. I recently had the pleasure of attending Cocoaconf Atlanta, where I attended an excellent 2D gaming workshop given by Josh Smith.

Physicseditor will get a sprite kit