cocos2d-x的跟随图片是怎么做的啊

Question

效果是那种鼠标触屏 、移动时 ，总有图片跟着走，这种用了什么技术啊，谢谢大家!!

Answer 1

有个moveto的事件啊  你在实现那个事件就可以啦

Answer 2

上面的记错了  应该是这个  你参考一下
-  (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    lastTouch = [touch locationInView:self];
    
    if (shapeType == kImageShape) {
        CGFloat horizontalOffset = drawImage.size.width / 2;
        CGFloat verticalOffset = drawImage.size.height / 2;
        redrawRect = CGRectUnion(redrawRect, 
                                 CGRectMake(lastTouch.x - horizontalOffset,
                                            lastTouch.y - verticalOffset, 
                                            drawImage.size.width, 
                                            drawImage.size.height));
    }
    else
        redrawRect = CGRectUnion(redrawRect, self.currentRect);
    redrawRect = CGRectInset(redrawRect, -2.0, -2.0);
    [self setNeedsDisplayInRect:redrawRect];
}-  (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *touch = [touches anyObject];
    lastTouch = [touch locationInView:self];
    
    if (shapeType == kImageShape) {
        CGFloat horizontalOffset = drawImage.size.width / 2;
        CGFloat verticalOffset = drawImage.size.height / 2;
        redrawRect = CGRectUnion(redrawRect,
                                 CGRectMake(lastTouch.x - horizontalOffset,
                                            lastTouch.y - verticalOffset, 
                                            drawImage.size.width,
                                            drawImage.size.height));
    }
    redrawRect = CGRectUnion(redrawRect, self.currentRect);
    [self setNeedsDisplayInRect:redrawRect];
}

Answer 3

-(void) ccTouchMoved:(UITouch *)touch withEvent:(UIEvent *)event
{
    //获取触摸点位置
    CGPoint touchLocation = [self convertTouchToNodeSpace:touch];
    //获取上一个触摸点位置
    CGPoint oldTouchLocation = [touch previousLocationInView:touch.view];
    oldTouchLocation = [[CCDirector sharedDirector] convertToGL:oldTouchLocation];
    oldTouchLocation = [self convertToNodeSpace:oldTouchLocation];
    //得到两个位置之间的向量
    CGPoint translation = ccpSub(touchLocation, oldTouchLocation);    attackPoint = touchLocation;
    //touchLocation = [[CCDirector sharedDirector] convertToGL:touchLocation];
    if (selmagic.magiccdend)
    {
        selmagic.magic_ring.opacity = 250;
        canmagic = YES;
        //移动后的触点位置
CGPoint newPos = ccpAdd(selmagic.magic_ring.position, translation);
        //让释放魔法可移动精灵随触点移动
        selmagic.magic_ring.position = newPos;
    }
    
}
按照这个方法写就可以了

Answer 4

ccTouchbegin  ccTouchMoved  重设精灵的位置