def drawStar(x0, y0, numArms, skip=[]):
for i in range(numArms):
a = a0 + i * 2 * pi / numArms
x = x0 + cos(a)
y = y0 + sin(a)
if i in skip:
ps.dot(x, y, fillcolor='lightgray')
ps.zigzag(x, y, x0, y0, linecolor='lightgray')
else:
ps.dot(x, y);
ps.zigzag(x, y, x0, y0)
ps.dot(x0, y0)
def hexagon(x0, y0, a0=2 * pi / 12, n=6):
lastX = 0
lastY = 0
for i in range(n):
a = a0 + i * 2.0 * pi / 6
x = x0 + cos(a)
y = y0 + sin(a)
ps.dot(x, y)
if i > 0:
ps.zigzag(x, y, lastX, lastY)
lastX = x
lastY = y
def drawStar(x0, y0, numArms, skip=[], connect=[]):
for i in range(numArms):
a = a0 + i * 2 * pi / numArms
x = x0 + cos(a)
y = y0 + sin(a)
if i in skip:
ps.dot(x, y, fillcolor='lightgray')
ps.zigzag(x, y, x0, y0, linecolor='lightgray')
else:
ps.dot(x, y)
ps.zigzag(x, y, x0, y0)
if i in connect:
a2 = a0 + (i + 1) * 2 * pi / numArms
x2 = x0 + cos(a2)
y2 = y0 + sin(a2)
ps.zigzag(x, y, x2, y2)
ps.dot(x0, y0)
import pstricks as ps
# Setup
rows = 4
cols = 4
# ps.put('\psset { coilarm=0.5, coilwidth=0.3, coilheight=0.4 }\n')
ps.init()
ps.dotSize = 0.2
ps.text(1.3, 1.4, '$\overset{\scriptscriptstyle{2, 2}}{u}$')
for y in range(rows):
for x in range(cols):
ps.dot(x, y)
if x == cols - 1 and y == rows - 2:
ps.zigzag(x, y, x, y + 1)
else:
if x < cols - 1:
ps.zigzag(x, y, x + 1, y)
if y < rows - 1:
if x == cols - 1:
ps.zigzag(x, y, x, y + 1)
else:
ps.zigzag(x, y, x, y + 1)
ps.end()
ps.render()
drawStar(x0, y0, numArms) ps.text(x0, y0 - 2.5, 'a)') ps.arc(x0, y0, 1.2, 0, -90, arrowEnd=True) a = - pi / 4 l = 1.6 ps.text(x0 + l * cos(a), y0 + l * sin(a), '$N-1$') x0 += 1.5 ps.line(x0, y0, x0 + 1, y0, arrowEnd=True) x0 += 2.5 y0 -= 0.5 drawStar(x0, y0, numArms, skip=[5]) ps.text(x0, y0 - 2.0, 'b)') ps.zigzag(x0, y0 + 1, x0, y0 + 2) ps.dot(x0, y0 + 2) ps.arc(x0, y0, 1.2, 0, -90, arrowEnd=True) a = - pi / 4 l = 1.6 ps.text(x0 + l * cos(a), y0 + l * sin(a), '$N-2$') ps.framebox(x0 + 0.5, y0, '$-1$') ps.framebox(x0 + 1.4, y0 + 0.5, '$-2$') ps.framebox(x0 + 0.5, y0 + 1, '$+2$') ps.framebox(x0 + 0.5, y0 + 2, '$+2$') ps.end() ps.render()