创建一个基于QOpenglWidget的点云显示窗口，主要实现点云的着色显示（基于z坐标相对值转为伪彩色），添加了键鼠控制点云放大，缩小，旋转，平移。
Comprehensive, latest, and deployable video deep learning algorithm, including video recognition, action localization, and temporal action detection tasks. It's a high-performance, light-weight codebase provides practical models for video understanding research and application
