为什么碰撞不工作，cocos2d v3？ [英] why collision not working , cocos2d v3?

问题描述

我用cocos2d v3创建简单的游戏，如flapy bird。
接口类：

  @interface GameScene：CCScene< CCPhysicsCollisionDelegate> 
 
 // ---------------------------------------- ------------------------------- 
 
 +（GameScene *）场景; 
  - （id）init; 
 
 // ---------------------------------------- ------------------------------- 
 @end 
  

在.m文件中：

  _physicsWorld = [CCPhysicsNode节点]; 
 _physicsWorld.gravity = ccp（0，0）; 
 _physicsWorld.collisionDelegate = self; 
 _physicsWorld.debugDraw = YES; 
 [self addChild：_physicsWorld]; 
 ......... 
 bird.physicsBody = [CCPhysicsBody bodyWithRect：（CGRect）{CGPointZero，bird.contentSize} cornerRadius：0]; 
 bird.physicsBody.collisionGroup = @birdGroup; 
 bird.physicsBody.collisionType = @birdCollision; 
 [_physicsWorld addChild：bird]; 
 ........ 
 
 tubeBody.physicsBody.collisionGroup = @tubeGroup; 
 tubeBody.physicsBody.collisionType = @tubeCollision; 
 tubeBody.physicsBody.type = CCPhysicsBodyTypeStatic; 
 
 [_physicsWorld addChild：tubeBody]; 
  - （BOOL）ccPhysicsCollisionBegin：（CCPhysicsCollisionPair *）pair typeA：（CCNode *）nodeA typeB：（CCNode *）nodeB {
 [self endGame] 
 NSLog（@end game）; 
 return YES; 
} 
  

为什么方法ccPhysicsCollisionBegin从不调用？

   - （BOOL）ccPhysicsCollisionBegin：（CCPhysicsCollisionPair *）对类型A：（CCNode *）nodeA typeB：（CCNode *）nodeB {
  

>

   - （BOOL）ccPhysicsCollisionBegin：（CCPhysicsCollisionPair *）pair tubeCollision：（CCNode *）nodeA birdCollision：（CCNode *）nodeB {
 

您有碰撞代理的示例代码，因此您必须使用nodeA将其适配为您的代码，管和节点B的鸟。

i create simple game like flapy bird with cocos2d v3 . Interface class:

@interface GameScene : CCScene<CCPhysicsCollisionDelegate>

// -----------------------------------------------------------------------

+ (GameScene *)scene;
- (id)init;

// -----------------------------------------------------------------------
@end

In .m file:

          _physicsWorld =[CCPhysicsNode node];
          _physicsWorld.gravity=ccp(0, 0);
          _physicsWorld.collisionDelegate=self;
          _physicsWorld.debugDraw =YES;
          [self addChild:_physicsWorld];
          .........
          bird.physicsBody=[CCPhysicsBody bodyWithRect:(CGRect){CGPointZero,bird.contentSize} cornerRadius:0];
          bird.physicsBody.collisionGroup=@"birdGroup";
          bird.physicsBody.collisionType=@"birdCollision";
           [_physicsWorld addChild:bird];
          ........

    tubeBody.physicsBody.collisionGroup =@"tubeGroup";
    tubeBody.physicsBody.collisionType=@"tubeCollision";
    tubeBody.physicsBody.type=CCPhysicsBodyTypeStatic;

    [_physicsWorld addChild:tubeBody];
-(BOOL)ccPhysicsCollisionBegin:(CCPhysicsCollisionPair *)pair typeA:(CCNode *)nodeA typeB:(CCNode *)nodeB{
    [self endGame];
    NSLog(@"end game");
    return YES;
}

why method ccPhysicsCollisionBegin never call?

解决方案

Change

-(BOOL)ccPhysicsCollisionBegin:(CCPhysicsCollisionPair *)pair typeA:(CCNode *)nodeA typeB:(CCNode *)nodeB{

To:

-(BOOL)ccPhysicsCollisionBegin:(CCPhysicsCollisionPair *)pair tubeCollision:(CCNode *)nodeA birdCollision:(CCNode *)nodeB{

You have the example code of the collision delegate, so you have to adapt it to your code with your nodeA that is the tube and nodeB the bird.

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