directshow实务精选第四章，主要内容是视频叠加，内容仅供学习-directshow substantive selected fourth chapter, the main content of the video overlay, only learning content

基于D3D的2D小游戏，供新手学习 实现功能有，天上落下娃娃， 人物碰撞实现， 图片渐进消失， 仅供学习-Based on D3D for 2D game for the novice to learn to achieve function, the sky falling dolls, figures to achieve the collision, pictures gradual disappear, only to learn