我自己学dx9编程时候的一个练习,只渲染了简单的2个三角形(有纹理映射),可以用vk_up来简单控制摄像机视角,可以帮助大家入门-My own school dx9 programming when a practice only render a simple two triangle (texture mapping), with vk_up simple control of the camera angle, you can help people get started

Open_GL的小程序，实现了人机互动 放大缩小 改变视角等功能-Open_GL small program to achieve human-computer interaction zoom function to change the viewing angle

osg中用代码对模型cow画的AABB包围盒，(AABB encircling box for model cow in OSG)