本章主要介绍图元属性，对于各种图元的属性具有详细的描述，以及相关的算法和思想，还有涉及到区域填充的各种方法，相信对大家的学习有帮助-This chapter introduces the element attributes, for a variety of graphic elements with the attributes described in detail, as well as related algorithms and ideas, but also relates to