python turtle 绘制创意梅花
""" author:魏振东 data：2019.10.25 func:绘制创意图形 """ from turtle import * from random import * #画雪花 def drawSnow(): hideturtle() pensize(2) for i in range(20): pencolor("white") penup() setx(randint(-640,640)) sety(randint(-400,400)) pendown() dens=randint(8,12) snowsize=randint(10,14) for j in range(dens): forward(snowsize) backward(snowsize) right(360/dens) # 位移函数 def gotopos(x, y): up() goto(x, y) down() ht() def apply_rules(path, rules): L = [_ for _ in path] for i in range(len(L)): symbol = L[i] if symbol == 'F': L[i] = rules[symbol] if symbol == 'X': L[i] = rules[symbol] path = ''.join(L) return path def draw_path(path): posList, angleList = [], [] for symbol in path: if symbol == 'F': forward(length) elif symbol == '+': left(angle) elif symbol == '-': rt(angle) elif symbol == '[': posList.append(pos()) angleList.append(heading()) elif symbol == 'a': pensize(3) color("black") elif symbol == 'b': pensize(2) color("black") elif symbol == 'c': pensize(2) color("black") elif symbol == ']': up() home() goto(posList.pop()) left(angleList.pop()) down() # 写字 def writez(x, y, str_, size=56, font="华文行楷"): gotopos(x, y) write(str_, font=(font, size)) # 画布 setup(1280, 800) speed(5) bgcolor("Silver") # 题字 color("black") writez(-213, -210, "梅", 196) writez(-50, 100, "宋") writez(80, 20, "王") writez(33, -30, "安", 62) writez(-18, -95, "石", 78) # 写诗 color("black") s = "墙角数枝梅" s2 = "凌寒独自开" s3 = "遥知不是雪" s4 = "为有暗香来" for i in range(len(s)): writez(560, 350 - i * 50, s[i], 36) for i in range(len(s2)): writez(510, 320 - i * 50, s2[i], 36) for i in range(len(s3)): writez(460, 290 - i * 50, s3[i], 36) for i in range(len(s4)): writez(410, 260 - i * 50, s4[i], 36) # 画雪 drawSnow() # 画梅 gotopos(249, -26) speed(0) gotopos(-650, -100) length = 6 path = 'F' angle = 27 rules = { 'F': 'aFF[b-F++F][c+F--F]c++F--F', 'X': 'aFF+[b+F]+[c-F]' } for _ in range(4): path = apply_rules(path, rules) draw_path(path) done()
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