Python 海龟创意绘画

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Author	Mifen
Blog	博客地址

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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

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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

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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