fix bug in swing practice

Better Together/Better Together/GameViews/TutorialScene.swift

@@ -103,6 +103,7 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
     var showRedLine = false
     var leftHandCanSwing = false
     var rightHandCanSwing = false
+    var bodyOnSwingPracticeGround = false
     
     // MARK: - Tutorial Scene
     override func didMove(to view: SKView) {
@@ -161,7 +162,7 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
         self.ground = obstacleCreator.createRectObstacle(rectSize: CGSize(width: groundWidth, height: groundHeight), type: .StartPoint, texture: nil)
         //MARK: why is the position not changed?
         self.ground?.position = CGPoint(x: 0, y: -self.frame.width / 6)
-        ground?.name = "ground"
+        ground!.name = "ground"
         obstacles["ground"] = ground!
         addChild(self.ground!)
         
@@ -331,6 +332,8 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
             if resetGrabStatus {
                 character.makeHandReleaseFromObstacle(hand: .LeftHand)
                 character.makeHandReleaseFromObstacle(hand: .RightHand)
+                leftGrabButtonPressed = false
+                rightGrabButtonPressed = false
                 resetGrabStatus = false
             }
             
@@ -623,7 +626,7 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
         
         if startSwingPractice && convert(character.bodyParts[.LeftUpperArm]!.position, from: character).y < ground!.position.y &&
             convert(character.bodyParts[.RightUpperArm]!.position, from: character).y < ground!.position.y {
-            if leftHandCanSwing && rightHandCanSwing {
+            if leftHandCanSwing && rightHandCanSwing && !bodyOnSwingPracticeGround {
                 
                 hangingSuccesful = true
                 
@@ -691,8 +694,11 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
                     character.makeHandGrabbingObstacle(hand: .LeftHand)
                     character.leftHandGrabbingAt = contactNodeB as? SKShapeNode
                     HapticResponseController.grabSucceedFeedback()
+                    
+                    if contactNodeB.name == "ground" {
                         leftHandCanSwing = true
                     }
+                }
                 
                 if contactNodeB.name == "handsUpLine" && canReachTiltUp {
                     character.leftHandFirstLineContact = true
@@ -719,11 +725,15 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
                     character.makeHandGrabbingObstacle(hand: .LeftHand)
                     HapticResponseController.grabSucceedFeedback()
                     character.leftHandGrabbingAt = contactNodeB as? SKShapeNode
+                    
+                    if contactNodeA.name == "ground" {
                         leftHandCanSwing = true
                     }
+                }
                 
                 if contactNodeA.name == "handsUpLine" && canReachTiltUp {
                     character.leftHandFirstLineContact = true
+                
                 }
                 
                 if contactNodeA.name == "firstFlag" {
@@ -748,8 +758,11 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
                     character.makeHandGrabbingObstacle(hand: .RightHand)
                     character.rightHandGrabbingAt = contactNodeB as? SKShapeNode
                     HapticResponseController.grabSucceedFeedback()
+                    
+                    if contactNodeB.name == "ground" {
                         rightHandCanSwing = true
                     }
+                }
                 
                 if contactNodeB.name == "handsUpLine" && canReachTiltUp {
                     character.rightHandFirstLineContact = true
@@ -776,8 +789,11 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
                     character.makeHandGrabbingObstacle(hand: .RightHand)
                     character.rightHandGrabbingAt = contactNodeB as? SKShapeNode
                     HapticResponseController.grabSucceedFeedback()
+                    
+                    if contactNodeA.name == "ground" {
                         rightHandCanSwing = true
                     }
+                }
                 
                 if contactNodeA.name == "handsUpLine" && canReachTiltUp {
                     character.rightHandFirstLineContact = true
@@ -803,10 +819,13 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
                     secondFlagReached = true
                 }
                 
+                if contact.bodyB.node!.name == "swingPractice" {
+                    bodyOnSwingPracticeGround = true
+                }
+                
                 if contact.bodyB.node!.name == "swingPractice" && startMovingPracticeGround && hangingSuccesful {
                     landed = true
                 }
- 
             }
         } else if contact.bodyB.node! == character.bodyParts[.Body]! {
             if obstacles.values.contains(contact.bodyA.node!) {
@@ -819,6 +838,10 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
                     secondFlagReached = true
                 }
                 
+                if contact.bodyB.node!.name == "swingPractice" {
+                    bodyOnSwingPracticeGround = true
+                }
+                
                 if contact.bodyA.node!.name == "swingPractice" && startMovingPracticeGround && hangingSuccesful {
                     landed = true
                 }
@@ -868,6 +891,20 @@ class TutorialScene: SKScene, SKPhysicsContactDelegate {
                 rightHandCanSwing = false
             }
         }
+        
+        if contact.bodyA.node! == character.bodyParts[.Body]! {
+            if obstacles.values.contains(contact.bodyB.node!) {
+                if contact.bodyB.node!.name == "swingPractice" {
+                    bodyOnSwingPracticeGround = false
+                }
+            }
+        } else if contact.bodyB.node! == character.bodyParts[.Body]! {
+            if obstacles.values.contains(contact.bodyA.node!) {
+                if contact.bodyB.node!.name == "swingPractice" {
+                    bodyOnSwingPracticeGround = false
+                }
+            }
+        }
     }