MapEarth二次开发及数字地球二次开发手册-Second MapEarth development and secondary development of Digital Earth Manual

jogl（java绑定opengl）源码，此文件包括opengl的直线、圆以及三角形篓垫算法，其中的直线和圆组成一个时钟。-jogl (java binding opengl) source, this document includes opengl linear, circular and triangular baskets, mats algorithm, which form a line and round the clock.