Swift 3 Physicsbody Collisions doesn't work - swift

Question

This is my class for the Player
My Player doesn't collide with the Gamefield they just go through each other.
I dont want them to be on top of each other.
I tried to google the solution but for me it seems that I did mostly all right.
Please Help:
class Player: SKShapeNode {
static public let length: CGFloat = 50
static public let rect = CGRect(x: -length/2, y: -length/2, width: length, height: length)
var life = 100
override init() {
super.init()
self.fillColor = SKColor.blue
self.strokeColor = SKColor.black
self.position = CGPoint(x: 50, y: 50)
self.physicsBody = SKPhysicsBody(edgeLoopFrom: Player.rect)
self.physicsBody?.isDynamic = true
self.physicsBody?.allowsRotation = false
self.physicsBody?.categoryBitMask = PhysicsCategory.Robot
self.physicsBody?.contactTestBitMask = PhysicsCategory.Projectile
self.physicsBody?.collisionBitMask = PhysicsCategory.Gamefield
self.physicsBody?.usesPreciseCollisionDetection = true
}; required init?(coder aDecoder: NSCoder) {fatalError("init(coder:) has not been implemented")}
func moveBy(vect: CGVector) {
self.position.x += vect.dx
self.position.y += vect.dy
//print(vect.dx, vect.dy)
}
}
This is my Gamescene Class
struct PhysicsCategory {
static let None : UInt32 = UInt32.min
static let All : UInt32 = UInt32.max
static let Robot : UInt32 = 0b0001 // 1
static let Gamefield : UInt32 = 0b0010 // 2
static let Monster : UInt32 = 0b0011 // 3
static let Projectile : UInt32 = 0b0100 // 4
}
class GameScene: SKScene, SKPhysicsContactDelegate {
var player = Player(rect: Player.rect)
var controlL: Control
var controlR: Control
var cam = SKCameraNode()
override init(size: CGSize) {
controlL = Control(posX: 0, size: size, direction: 1)
controlR = Control(posX: size.width, size: size, direction: -1)
super.init(size: size)
}; required init?(coder aDecoder: NSCoder) {fatalError("init(coder:) has not been implemented")}
override func didMove(to view: SKView) {
self.backgroundColor = SKColor.white
physicsWorld.gravity = CGVector.zero
physicsWorld.contactDelegate = self
cam.xScale = 1
cam.yScale = 1
self.camera = cam
player.addChild(cam)
let gameFieldRect = CGRect(x: 0, y: 0, width: 1000, height: 600)
let gameField = SKShapeNode(rect: gameFieldRect)
gameField.fillColor = SKColor.clear
gameField.strokeColor = SKColor.black
gameField.position = CGPoint(x: 0, y: 0)
gameField.physicsBody = SKPhysicsBody(edgeLoopFrom: gameFieldRect)
gameField.physicsBody?.isDynamic = true
gameField.physicsBody?.allowsRotation = false
gameField.physicsBody?.categoryBitMask = PhysicsCategory.Gamefield
gameField.physicsBody?.contactTestBitMask = PhysicsCategory.None
gameField.physicsBody?.collisionBitMask = PhysicsCategory.Robot
self.addChild(gameField)
self.addChild(player)
cam.addChild(controlL.add())
cam.addChild(controlR.add())
I hope someone sees the mistake. It took me quite long allready.

Answer 1

You need to change your robot to a different physics body type (rectangleOf)?:
SpriteKit supports two kinds of physics bodies, volume-based bodies and edge-based bodies. When you create a physics body, its kind, size, and shape are determined by the constructor method you call. An edge-based body does not have mass or volume and is unaffected by forces or impulses in the system. Edge-based bodies are used to represent volume-less boundaries or hollow spaces in your physics simulation. In contrast, volume-based bodies are used to represent objects with mass and volume.
Also, are you using impulses or forces to move your robot? Not .move(to:) or .position =? move and position will break your physics world (it will go through it in some scenarios)
Also, it looks like you need to change your category masks to a proper series (for didBegin(contact:))
it should be, 1, 2 , 4, 8, 16, so on... that is how you get unique contact hits.. Right now you could get a hit of "4" from 0+4 or 1+3... thus, not unique collisions.
Your collisionBitMask looks good though.. They should be bumping into each other.