Cocos2d 游戏中的碰撞检测?

发布时间：2023/10/11 cocos 游戏

本文介绍了Cocos2d 游戏中的碰撞检测?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我正在尝试通过以下方式检测两个精灵的碰撞...但是当我尝试运行游戏时没有发生碰撞......什么我可能做错了吗?

i am trying to detect Collision of two sprites in the following way...but when i try to run the game no collision takes place.... what am i possibly doing wrong??

- (void)update:(ccTime)dt {



    CGRect projectileRect = CGRectMake(projectile.position.x - (projectile.contentSize.width/2), 
                                       projectile.position.y - (projectile.contentSize.height/2), 
                                       projectile.contentSize.width, 
                                       projectile.contentSize.height);

    //CGRectMake(0,220,320,50);
    CGRect targetRects =  CGRectMake(_monkey.position.x - (_monkey.contentSize.width/2), 
                                 _monkey.position.y - (_monkey.contentSize.height/2), 
                                 _monkey.contentSize.width, 
                                 _monkey.contentSize.height);

        if (CGRectIntersectsRect(projectileRect, targetRects)) {
                    NSLog(@"ha ha Collision detected"); 
        }

}

projectile 精灵从屏幕顶部到底部动画，monkey 精灵在底部从左到右动画弹丸穿过猴子，但日志确实不被叫???

projectile sprite is animating from top of screen to the bottom and monkey sprite is animating from left to right at the bottom the projectile goes through the monkey but the log does not get called???

- (void)update:(ccTime)dt {

CGRect projectileRect = [projectile boundingBox];
CGRect targetRects = [_monkey boundingBox];

if (CGRectIntersectsRect(projectileRect, targetRects))
{
    NSLog(@"ha ha Collision detected");
}

CGRect projectileRects = CGRectMake(projectile.position.x - (projectile.contentSize.width/2), 
                                   projectile.position.y - (projectile.contentSize.height/2), 
                                   projectile.contentSize.width, 
                                  projectile.contentSize.height);
CGRect targetRect = CGRectMake(_monkey.position.x - (_monkey.contentSize.width/2), 
                               _monkey.position.y - (_monkey.contentSize.height/2), 
                               _monkey.contentSize.width, 
                              _monkey.contentSize.height);
if (CGRectIntersectsRect(projectileRects, targetRect)) {
    NSLog(@"@@@@@@@@@@@@@@@@@@@@@@@@@@@@");             
}

}

-(void)spriteMoveFinished:(id)sender {

//NSLog(@"spriteMoveFinished");
CCSprite *sprite = (CCSprite *)sender;
[self removeChild:sprite cleanup:YES];

if (sprite.tag == 1) { 
    [_targets removeObject:sprite];



} else if (sprite.tag == 2) { 
    [_projectiles removeObject:sprite];
}

}

-(void)addTarget {

projectile = [CCSprite spriteWithFile:@"egg.png" rect:CGRectMake(0, 0, 10, 10)];
projectile.position = ccp(_bear.position.x,_bear.position.y-20);
projectile.tag=2;
[self addChild:projectile];

CGPoint realDest = ccp(_bear.position.x, _bear.position.y - 380);

int minDuration = 2.0;
int maxDuration = 4.0;
int rangeDuration = maxDuration - minDuration;
int actualDuration = (arc4random() % rangeDuration) + minDuration;

// Move projectile to actual endpoint
[projectile runAction:[CCSequence actions:
                       [CCMoveTo actionWithDuration:actualDuration position:realDest],
                       [CCCallFuncN actionWithTarget:self selector:@selector(spriteMoveFinished:)],
                       nil]];

// Add to projectiles array
projectile.tag = 2;
[_projectiles addObject:projectile];

}

-(void) registerWithTouchDispatcher
{
    [[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:0 swallowsTouches:YES];
}

-(BOOL) ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event {

CGPoint touchLocation = [self convertTouchToNodeSpace:touch];


if(CGRectContainsPoint(CGRectMake(0,0,320,50),touchLocation)) 
{
    if (![_walkMonkey isDone]) {
        [_monkey runAction:_walkMonkey];
    }


}
else {

}

return YES;

}

-(void) ccTouchEnded:(UITouch *)touch withEvent:(UIEvent *)event {

CGPoint touchLocation = [self convertTouchToNodeSpace:touch];

if(CGRectContainsPoint(CGRectMake(0,0,320,50),touchLocation)) 
{

    [_monkey stopAction:_walkMonkey];

}

}

- (void)ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event {       

    CGPoint touchLocation = [self convertTouchToNodeSpace:touch];

    CGPoint oldTouchLocation = [touch previousLocationInView:touch.view];
    oldTouchLocation = [[CCDirector sharedDirector] convertToGL:oldTouchLocation];
    oldTouchLocation = [self convertToNodeSpace:oldTouchLocation];

    CGPoint translation = ccpSub(touchLocation, oldTouchLocation);    

    if (translation.x > 3) {

        _monkey.flipX=YES;
    }
    else if (translation.x < -3){
        _monkey.flipX=NO;

    }

    if(CGRectContainsPoint(CGRectMake(40,0,240,50),touchLocation)) 
    {

        CGPoint newPos = ccpAdd(translation,_monkey.position);
        if(newPos.x >= 320 || newPos.x <= 20)
        {
            NSLog(@"monkey not walking");
        }
        else {
            newPos.y = 100;
            _monkey.position = newPos;
        }

    }

}

Cocos2d 游戏中的碰撞检测?

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