Remove sad macs when the bounce off screen

st3fan · Apr 24, 2018 · 34bce96 · 34bce96
1 parent 954e707
commit 34bce96
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Showing 2 changed files with 17 additions and 1 deletion.
diff --git a/SadMac/SadMacScene.h b/SadMac/SadMacScene.h
@@ -4,7 +4,7 @@
 
 #import <SpriteKit/SpriteKit.h>
 
-@interface SadMacScene: SKScene {
+@interface SadMacScene: SKScene <SKPhysicsContactDelegate> {
     BOOL _isPreview;
 }
 - (instancetype) initWithSize:(CGSize)size isPreview: (BOOL) isPreview;

diff --git a/SadMac/SadMacScene.m b/SadMac/SadMacScene.m
@@ -59,6 +59,8 @@ - (SKNode*) createSadMacAtPosition: (CGPoint) position {
         node.physicsBody.density = 0.5;
         node.physicsBody.angularVelocity = RandomAngularVelocity();
         node.physicsBody.velocity = RandomVelocity();
+        node.physicsBody.categoryBitMask = 2;
+        node.physicsBody.contactTestBitMask = 1;
     }
 
     return node;
@@ -67,6 +69,11 @@ - (SKNode*) createSadMacAtPosition: (CGPoint) position {
 - (void)sceneDidLoad {
     self.backgroundColor = [NSColor blackColor];
 
+    self.physicsBody = [SKPhysicsBody bodyWithEdgeLoopFromRect: NSInsetRect(self.frame, -400, -400)];
+    self.physicsBody.categoryBitMask = 1;
+    self.physicsBody.contactTestBitMask =  2;
+    self.physicsWorld.contactDelegate = self;
+
     SKNode *floor = [self createFloor];
     [self addChild: floor];
 
@@ -98,4 +105,13 @@ - (void)sceneDidLoad {
     [node runAction: [SKAction sequence: actions]];
 }
 
+- (void)didBeginContact:(SKPhysicsContact *)contact {
+    if (contact.bodyA.categoryBitMask == 2 && contact.bodyB.categoryBitMask == 1) {
+        [contact.bodyA.node removeFromParent];
+    }
+    if (contact.bodyB.categoryBitMask == 2 && contact.bodyA.categoryBitMask == 1) {
+        [contact.bodyB.node removeFromParent];
+    }
+}
+
 @end