图形学程序包 包括图形学所学过的所有算法 平移 裁剪 旋转 B样条 等等 -Graphics Graphics by package including all the algorithms studied pan B-spline rotary cutting, etc.

一个旋转输出文本的例子，适合初学者进行学习研究。-A rotary output of the example text, suitable for beginners to study.