Python 海龟创意绘画

|Author|Mifen| |---|--- |Blog|博客地址

演示

Symbols The following characters have a geometric interpretation.

|#|Character |Meaning| |---|----|-----| |1|F| Move forward by line length drawing a line| |2|f |Move forward by line length without drawing a line| |3|+|Turn left by turning angle| |4|-|Turn right by turning angle| |5|/|Reverse direction (ie: turn by 180 degrees)| |6|[|Push current drawing state onto stack| |7|]|Pop current drawing state from the stack| |8|#|Increment the line width by line width increment| |9|!| Decrement the line width by line width increment| |10|@| Draw a dot with line width radius| |11|{|Open a polygon| |12|}|Close a polygon and fill it with fill colour| |13|<| Multiply the line length by the line length scale factor| |14|>|Divide the line length by the line length scale factor| |15|&|Swap the meaning of + and -| |16|(|Decrement turning angle by turning angle increment| |17|)|Increment turning angle by turning angle increment|

以下符号字符的几何解释。

|#|字符 |含义| |---|----|-----| |1|F|按行绘制一条线向前移动| |2|f |按线条长度向前移动而不绘制线条| |3|+|通过转动角度向左转动| |4|-|通过转动角度向右转动| |5|/|反向（即：转动180度）| |6|[|将当前绘图状态推入堆栈| |7|]|从堆栈弹出当前绘图状态| |8|#|按线宽增量增加线宽| |9|!| 通过线宽增量减小线宽| |10|@| 绘制带有线宽半径的点 |12|}|关闭多边形并用填充颜色填充 |13|<| 将线长乘以线长比例因子| |14|>|将线长除以线长比例因子| |15|&|交换+和 - 的含义| |16|(|通过转动角度增量减小转动角度| |17|)|通过转动角度增量来增加转动角度 | |18|{|打开多边形|

函数介绍

• draw_path(length, angle, path, expalnation)
  • 主要用来绘制海龟行走路径
    • length ---->每次行走的距离
    • angle ---->偏移的角度
    • path ---->初始路径图案,即0阶的形状
    • expalnation ---->用来记录打印每一步操作
• apply_rules(path, rules)
  • 主要是转换每一阶段的path
    • path ---->初始路径图案,即0阶的形状
    • rules ---->转换的规则
• getColor()
  • 提供一个随机rgb值
• initialization()
  • 初始化各种参数
• Introduction(x=-600, y=-350)
  • 注解
    • 默认海龟初始位置(-600,-350)
• run(n,angle,length,path,rules)
  • 启动程序