Toland的专栏

scrollToPercentVertical无效原因和解决方法及百分比问题研究

以一个点为起始点，向周围其他点发出射线，这时候就要对射线图片进行旋转，旋转角度通过起始两点间夹角来计算。封装的函数如下：float YourClassName::getAngle( Vec2& from, Vec2& to ){ float len_y = to.y - from.y; float len_x = to.x - from.x; if( 0 == len_x && from.

cocos2dx动画整理，陆续添加。基于win7，vs2012，cocos2dx v3.91）翻牌动画 auto pokerFront = Sprite::create("poker_front.png"); pokerFront->setPosition(Vec2(visibleSize.width/2 + origin.x, visibleSize.height/2