Add Code to Destroy Collectibles
Switch back to the Player.swift file, and in the attack() method, above the line that reads var throwDirection = CGVector(dx: 0, dy: 0), add the following code:
| | // Set up physics for projectile |
| | let physicsBody = SKPhysicsBody(rectangleOf: projectile.size) |
| | |
| | physicsBody.affectedByGravity = false |
| | physicsBody.allowsRotation = true |
| | physicsBody.isDynamic = true |
| | |
| | physicsBody.categoryBitMask = PhysicsBody.projectile.categoryBitMask |
| | physicsBody.contactTestBitMask = PhysicsBody.projectile.contactTestBitMask |
| | physicsBody.collisionBitMask = PhysicsBody.projectile.collisionBitMask |
| | |
| | projectile.physicsBody = physicsBody |
This sets the projectile’s physics body to use the projectile category.
Next, back in the GameScene+PhysicsContact.swift file, add the code necessary to handle the contacts between the projectile and collectible categories:
| | // MARK: - Projectile | Collectible |
| | |
| | case PhysicsBody.projectile.categoryBitMask | |
| | PhysicsBody.collectible.categoryBitMask: |
| | let projectileNode = contact.bodyA.categoryBitMask == |
| | PhysicsBody.projectile.categoryBitMask ? |
| | contact.bodyA.node : contact.bodyB.node |
| | |
| | let collectibleNode = contact.bodyA.categoryBitMask == |
| | PhysicsBody.collectible.categoryBitMask ? |
| | contact.bodyA.node : contact.bodyB.node |
| | |
| | if let collectibleComponent = |
| | collectibleNode?.entity?.component(ofType: CollectibleComponent.self) { |
| | collectibleComponent.destroyedItem() |
| | } |
| | projectileNode?.removeFromParent() |
Build and run the project. Try shooting the key, the treasure, and the food. Notice you’re able to shoot and destroy only the food.
..................Content has been hidden....................
You can't read the all page of ebook, please click here login for view all page.