第1课的地址：
http://blog.csdn.net/xingxiliang/article/details/18557631
书接上回：今天我们让我们的主角可以发射飞镖。
avi版本可以方便的在手机，pc上查看。下载地址（只有20M左右，下载很快）：http://pan.baidu.com/s/1ELk78
this->setTouchEnabled(true); // 在HelloWorld::init函数中
void HelloWorld::ccTouchesEnded(CCSet *pTouches, CCEvent *pEvent) // 触摸事件响应函数
{
CCTouch* touch = (CCTouch*)pTouches->anyObject();
CCPoint locInView = touch->getLocationInView();
CCPoint loc = CCDirector::sharedDirector()->convertToGL(locInView); //从UI坐标变换到cococs2d中的坐标
if (loc.x <= 20)// 触摸点在出发点左侧不处理
{
return ;
}
CCSize screenSize = CCDirector::sharedDirector()->getVisibleSize();
CCSprite* proj = CCSprite::create("Projectile.png");
proj->setPosition(ccp(20, screenSize.height / 2.0));
this->addChild(proj); //创建飞镖精灵
double dx = loc.x - 20;
double dy = loc.y - screenSize.height / 2.0;
double d = sqrt(dx * dx + dy * dy); // 触摸点到出发点的距离
double D = sqrt(screenSize.width * screenSize.width + screenSize.height * screenSize.height); // 总的运行距离
double ratio = D / d;
double endx = ratio * dx + 20; // 最终点的x坐标
double endy = ratio * dy + screenSize.height / 2.0;// 最终点的y坐标
CCMoveTo* move = CCMoveTo::create(D / 320, ccp(endx, endy));
CCCallFuncN* moveFinish = CCCallFuncN::create(this, callfuncN_selector(HelloWorld::myDefine));
CCSequence* actions = CCSequence::create(move, moveFinish, NULL);
proj->runAction(actions);
}
转载请注明出处：http://blog.csdn.net/xingxiliang/article/details/18599871