如何检测cocos2d中旋转的sprite上的触摸 [英] how to detect touch on rotated sprite in cocos2d

问题描述

我已经旋转精灵到90.我检查了旋转的精灵的触摸位置如下：

I have rotated sprite to 90. I checked the touch location of the rotated sprite as follows:

matchsprite.rotation=90;

CGRect r=CGRectMake(matchstick.position.x, matchstick.position.y, matchstick.contentSize.height,matchstick.contentSize.width);
if(CGRectContainsPoint(r, location))    
    NSLog(@"Hii");

此代码中的错误是什么？我没有得到嗨。

What is the error in this code? I didnt get "Hii". How to detect whether we tap that rotated sprite or not?

推荐答案

这里有两个CCNode扩展添加到 Kobold2D 游戏引擎：

Here are the two CCNode extension (category) methods I've added to the Kobold2D game engine:

-(BOOL) containsPoint:(CGPoint)point
{
    CGRect bbox = CGRectMake(0, 0, contentSize_.width, contentSize_.height);
    CGPoint locationInNodeSpace = [self convertToNodeSpace:point];
    return CGRectContainsPoint(bbox, locationInNodeSpace);
}

-(BOOL) containsTouch:(UITouch*)touch
{
    CCDirector* director = [CCDirector sharedDirector];
    CGPoint locationGL = [director convertToGL:[touch locationInView:director.openGLView]];
    return [self containsPoint:locationGL];
}

测试点是否在精灵（或标签或任何其他节点）那么简单如下：

Testing if a point is on a sprite (or label or any other node) then is as simple as:

UITouch* uiTouch = [touches anyObject];
if ([aSprite containsTouch:uiTouch])
{
    // do something
}

这篇关于如何检测cocos2d中旋转的sprite上的触摸的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！