处理touch ＋判断是否碰到sprite

最新推荐文章于 2024-08-13 10:01:57 发布

转载最新推荐文章于 2024-08-13 10:01:57 发布 · 2.3k 阅读

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本文介绍了如何在 Cocos2d-x 中注册触摸事件并实现精灵之间的碰撞检测。通过调整精灵的 bounding box 大小来更精确地匹配精灵的实际可见区域，从而提高碰撞检测的准确性。

-(void) registerWithTouchDispatcher
{
	[[CCTouchDispatcher sharedDispatcher] addTargetedDelegate:self priority:kCCMenuTouchPriority swallowsTouches:NO];
}
 
-(BOOL) ccTouchBegan:(UITouch *)touch withEvent:(UIEvent *)event
{ 
    CGPoint touchLocation = [self convertTouchToNodeSpace:touch];
    for (CCSprite *mole in moles) {
        if (mole.userData == FALSE) continue;
        if (CGRectContainsPoint(mole.boundingBox, touchLocation)) {
 
            mole.userData = FALSE;            
            score+= 10;
 
            [mole stopAllActions];
            CCAnimate *hit = [CCAnimate actionWithAnimation:hitAnim restoreOriginalFrame:NO];
            CCMoveBy *moveDown = [CCMoveBy actionWithDuration:0.2 position:ccp(0, -mole.contentSize.height)];
            CCEaseInOut *easeMoveDown = [CCEaseInOut actionWithAction:moveDown rate:3.0];
            [mole runAction:[CCSequence actions:hit, easeMoveDown, nil]];
        }
    }


#pragma mark - Adjusted Box
-(CGRect)adjustedBoundingBox {
    // Adjust the bouding box to the size of the sprite
    // without the transparent space
CGRect vikingBoundingBox = [self boundingBox];
    float xOffset;
    float xCropAmount = vikingBoundingBox.size.width * 0.5482f;
    float yCropAmount = vikingBoundingBox.size.height * 0.095f;
    if ([self flipX] == NO) {
        // Viking is facing to the rigth, back is on the left
        xOffset = vikingBoundingBox.size.width * 0.1566f;
    } else {
        // Viking is facing to the left; back is facing right
        xOffset = vikingBoundingBox.size.width * 0.4217f;
    }
    vikingBoundingBox =
    CGRectMake(vikingBoundingBox.origin.x + xOffset,
               vikingBoundingBox.origin.y,
               vikingBoundingBox.size.width - xCropAmount,
               vikingBoundingBox.size.height - yCropAmount);
    if (characterState == kStateCrouching) {
        // Shrink the bounding box to 56% of height
        // 88 pixels on top on iPad
        vikingBoundingBox = CGRectMake(vikingBoundingBox.origin.x,
        vikingBoundingBox.origin.y,
        vikingBoundingBox.size.width,
        vikingBoundingBox.size.height * 0.56f);
}
    return vikingBoundingBox;
}

return TRUE;}