107 lines
2.0 KiB
Python
107 lines
2.0 KiB
Python
#
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# Code under the MIT license by Alexander Pruss
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#
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# L-system with turtle graphics
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#
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import lsystem
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import random
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from mcturtle import *
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t = Turtle()
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t.pendelay(0)
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t.turtle(None)
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t.verticalangle(90)
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def tree():
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global angle
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global thickness
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global length
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angle = 15
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thickness = 8
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length = 10
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t.pendown()
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t.penblock(WOOD)
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rules = {'A': [(0.55,'^f[^^f>>>>>>A]>>>[^^f>>>>>>A]>>>>>[^^f>>>>>>A]'),
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(0.25,'^f>>[^^f>>>>>>A]>>>[^^f>>>>>>A]')]}
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axiom = 'fA'
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material = WOOD
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t.penwidth(thickness)
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t.penblock(material)
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stack = []
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def push():
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global length
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global thickness
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stack.append((length,thickness))
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t.push()
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thickness = thickness * 0.6
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if length == 10:
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length = 9
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elif length == 9:
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length = 8.4
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else:
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length = length * 0.75
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if thickness < 1:
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thickness = 1
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if length <= 1.6:
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t.penblock(LEAVES_OAK_PERMANENT)
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t.penwidth(thickness)
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def pop():
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global length
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global thickness
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length,thickness = stack.pop()
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t.pop()
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dictionary = {
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'[': push,
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']': pop,
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'^': lambda: t.pitch(angle),
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'>': lambda: t.roll(angle),
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'f': lambda: t.go(length)
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}
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lsystem.lsystem(axiom, rules, dictionary, 11)
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#tree()
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MIN_DISTANCE = 30
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MAX_TRIES = 100
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SIZE = MIN_DISTANCE * 10
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OVALITY = 1.5
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cx = t.position.x
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cy = t.position.y
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cz = t.position.z
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tryCount = 0
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positions = []
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while tryCount < MAX_TRIES:
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x = random.uniform(-1,1)
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z = random.uniform(-1,1)
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if x**2 + z**2 > 1:
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continue
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x = cx + SIZE/2 * x
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z = cz + SIZE/2 * OVALITY * z
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ok = True
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for x0,z0 in positions:
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if (x-x0)**2 + (z-z0)**2 < MIN_DISTANCE**2:
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ok = False
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break
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if not ok:
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tryCount += 1
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continue
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positions.append((x,z))
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tryCount = 0
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t.goto(x,cy,z)
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print x,cy,z
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t.push()
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t.roll(random.uniform(0,30))
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tree()
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t.pop()
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