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Yin and yang: Difference between revisions
→{{header|Python}}: Add Turtle graphics.
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=={{header|Python}}==
===Text===
For positive integer n > 0, the following generates an ASCII representation of the Yin yang symbol.
{{works with|Python|3.x}}
Line 505 ⟶ 506:
*
>>> </pre>
===Turtle Graphics===
<lang python>from turtle import *
mode('logo')
def taijitu(r):
'''\
Draw a classic Taoist taijitu of the given radius centered on the current
turtle position. The "eyes" are placed along the turtle's heading, the
filled one in front, the open one behind.
'''
# useful derivative values
r2, r4, r8 = (r >> s for s in (1, 2, 3))
# remember where we started
x0, y0 = start = pos()
startcolour = color()
startheading = heading()
color('black', 'black')
# draw outer circle
pendown()
circle(r)
# draw two 'fishes'
begin_fill(); circle(r, 180); circle(r2, 180); circle(-r2, 180); end_fill()
# black 'eye'
setheading(0); penup(); goto(-(r4 + r8) + x0, y0); pendown()
begin_fill(); circle(r8); end_fill()
# white 'eye'
color('white', 'white'); setheading(0); penup(); goto(-(r+r4+r8) + x0, y0); pendown()
begin_fill(); circle(r8); end_fill()
# put the turtle back where it started
penup()
setpos(start)
setheading(startheading)
color(*startcolour)
if __name__ == '__main__':
# demo code to produce image at right
reset()
#hideturtle()
penup()
goto(300, 200)
taijitu(200)
penup()
goto(-150, -150)
taijitu(100)
hideturtle()</lang>
=={{header|SVG}}==
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