ios - 如何在两个 SpriteKit 对象之间创建分隔

Question

我有一个圆形和内部和外部的三角形。我正在检查我的角色是否不在接触三角形的圆外的圆内，反之亦然。

即使我的角色脱离了我的圈子，这种情况仍然会发生。事实上，如果我在我的圆圈内并且三角形在我的圆圈外，那么我的角色不应该接触它们。我该如何解决这个问题？

有人有想法吗？

我的代码:

 func AddCharacter() {

        BooCharacter.size = CGSize(width: 30, height: 30)
        BooCharacter.anchorPoint.y = 0
        BooCharacter.zRotation = CGFloat(-M_PI_2)
        //BooCharacter.position.y += circleRadius
        BooCharacter.position = CGPoint(x:0.0, y:circleRadius)
        BooCharacter.physicsBody = SKPhysicsBody(texture:BooCharacterSKT, size: CGSize(width: 30, height: 30))
        BooCharacter.physicsBody = SKPhysicsBody(circleOfRadius: 15);
        BooCharacter.physicsBody?.categoryBitMask = heroCategory
        BooCharacter.physicsBody?.contactTestBitMask = triangleCategory
        BooCharacter.physicsBody?.collisionBitMask = triangleCategory;
    }


    func AddCircle() {

        Circle = SKShapeNode(circleOfRadius: circleRadius)
        Circle.position = CGPoint(x: self.size.width/2, y: self.size.height/2)
        Circle.strokeColor = UIColor.whiteColor()
        self.addChild(Circle)
        Circle.addChild(BooCharacter)

        self.AddTriangleToCircle(Circle, Location: CGFloat(random(1...90)), Inside: true)
        self.AddTriangleToCircle(Circle, Location: CGFloat(random(90...280)), Inside: false)
        self.AddTriangleToCircle(Circle, Location: CGFloat(random(280...360)), Inside: false)
        //self.AddTriangleToCircle(Circle, Location: 90)
        //self.AddTriangleToCircle(Circle, Location: 180)
        //self.AddTriangleToCircle(Circle, Location: 240)
        //self.AddTriangleToCircle(Circle, Location: 300)
    }

    func AddPointsLable() {

        pointsLabel = PointsLabel(num: 0)
        pointsLabel.position = CGPoint(x: self.size.width/2, y: self.size.height/2 - 35)
        pointsLabel.name = "pointsLabel"
        addChild(pointsLabel)
    }

    override func touchesBegan(touches: Set<UITouch>, withEvent event: UIEvent?) {

        BooCharacter.zRotation += CGFloat(M_PI)



         //for touch in touches {
         //let location = touch.locationInNode(self)

            let TapLable = childNodeWithName("tap")
            TapLable?.removeFromParent()

        //}



    }



    override func update(currentTime: NSTimeInterval) {
        angleRelatedToCircle -= rotationSpeed
        //BooCharacter.zRotation -= rotationSpeed

        let newLocation = CGPointMake(circleRadius * cos(angleRelatedToCircle), circleRadius * sin(angleRelatedToCircle));
//      BooCharacter.position.x = circleRadius * cos(angleRelatedToCircle)
//      BooCharacter.position.y = circleRadius * sin(angleRelatedToCircle)

        BooCharacter.runAction(SKAction.rotateByAngle(-rotationSpeed, duration: 0));
        BooCharacter.runAction(SKAction.moveTo(newLocation, duration: 0));

        //SKAction.moveTo(CGP, duration: <#T##NSTimeInterval#>)

        //NSLog("x = %f, y = %f, r = %f",BooCharacter.position.x,BooCharacter.position.y,BooCharacter.zRotation);
    }

    func AddTriangleToCircle(Circle: SKShapeNode, Location: CGFloat, Inside: Bool) {

        let Triangle: SKSpriteNode = SKSpriteNode(imageNamed: "Triangle")

        Triangle.size = CGSize(width: 30, height: 30)
        Triangle.anchorPoint.y = 0


        if Inside == true {
            // Inside Triangle
            Triangle.zRotation = CGFloat(M_PI_2)
        } else {
            // Outside Triangle
            Triangle.zRotation = CGFloat(-M_PI_2)
        }

        Triangle.position = CGPoint(x:0.0, y:circleRadius)

        let rotationSpeed1 = rotationSpeed + Location;
        var angleRelatedToCircle1 = angleRelatedToCircle;

        angleRelatedToCircle1 -= rotationSpeed1
        Triangle.zRotation -= rotationSpeed1

        Triangle.position.x = circleRadius * cos(angleRelatedToCircle1)
        Triangle.position.y = circleRadius * sin(angleRelatedToCircle1)

        //Triangle.name = "Triangle";
        Triangle.physicsBody = SKPhysicsBody(texture:TriangelSKT, size: CGSize(width: 30, height: 30))
        //TODO:  Make this a polygon body
        Triangle.physicsBody?.categoryBitMask = triangleCategory
        Triangle.physicsBody?.contactTestBitMask = heroCategory
        Triangle.physicsBody?.collisionBitMask = heroCategory
        Circle.addChild(Triangle);
    }

    func didBeginContact(contact: SKPhysicsContact) {
        // ---------------------------------------------
        // Hero Hit Triangle
        // ---------------------------------------------
        if (contact.bodyA.categoryBitMask == triangleCategory) {

            // Play Sound Effect

            // Remove Triangle
            //contact.bodyA.node?.removeFromParent();

            // Update Score

            NSLog("Hero hit Triangle");
        }
    }

    func random(range: Range<Int> ) -> Int
    {
        var offset = 0

        if range.startIndex < 0   // allow negative ranges
        {
            offset = abs(range.startIndex)
        }

        let mini = UInt32(range.startIndex + offset)
        let maxi = UInt32(range.endIndex   + offset)

        return Int(mini + arc4random_uniform(maxi - mini)) - offset
    }

}

Answer 1

您可能想要像这样设置角色的物理体:

BooCharacter.physicsBody = SKPhysicsBody(circleOfRadius: 15);

因为目前，字符大小是一个30x30的矩形，它的主体是一个直径为60(d=2r)的圆。你需要一个直径为 30 的物体。

此外，您正在更改角色 anchor ，但请记住物理 body 不受该操作的影响。它始终以节点的位置为中心...阅读更多内容 example .

关于三角节点。目前它有一个矩形的物理体，即使它是三角形。不确定你是否想要那样，但这可能会导致你遇到的问题。您有几个选项可以解决这个问题:

1. 手动创建物理体，就像您的 previous questions 中指出的那样，或者

2. Create a physics body from a texture .请记住，这可能是性能密集型的，但它可能适合您的游戏，因为场景中没有很多物体。