def write(size, color):
size = size * 0.3
cwrite = canvas.canvas()
p = path.path(path.moveto(-0.2, 0.8), path.lineto(0.2, 0.8),
path.lineto(0.2, 0), path.lineto(0, -0.2),
path.lineto(-0.2, 0), path.lineto(-0.2, 0.8),
path.closepath(), path.moveto(0, 0.8), path.lineto(0, 0.05),
path.moveto(-0.2, 0), path.arcn(-0.1, 0, 0.1, 180, 20),
path.arcn(0.1, 0, 0.1, 160, 0))
cwrite.stroke(
p, [color,
trafo.scale(size).rotated(-30).translated(0, -0.4 * size)])
return cwrite
def draw_sector(self, end):
"""draw the sector"""
segment = path.path(
path.arc(self.xo, self.yo, self.inner_r, self.start_angle,
self.end_angle),
path.arcn(self.xo, self.yo, self.sector_width + self.inner_r,
self.end_angle, self.start_angle), path.closepath())
self.shape_canvas.fill(segment, [self.sector_color])
# draw a delimiting line between sectors
line_color = color.gray(0.15)
if end and (self.end_angle - self.start_angle) < 0.25:
line_color = color.rgb.red
r = self.inner_r + self.sector_width
start_radians = self.start_angle * pi / 180.0
end_radians = self.end_angle * pi / 180.0
x0 = self.inner_r * cos(start_radians) + self.xo
y0 = self.inner_r * sin(start_radians) + self.yo
x1 = r * cos(start_radians) + self.xo
y1 = r * sin(start_radians) + self.yo
self.shape_canvas.stroke(path.line(x0, y0, x1, y1),
[style.linewidth(0.01), line_color])
x0 = self.inner_r * cos(end_radians) + self.xo
y0 = self.inner_r * sin(end_radians) + self.yo
x1 = r * cos(end_radians) + self.xo
y1 = r * sin(end_radians) + self.yo
self.shape_canvas.stroke(path.line(x0, y0, x1, y1),
[style.linewidth(0.01), line_color])
def server(r, servercolor=color.rgb(0.5, 0.5, 0.8)):
c = canvas.canvas()
c.fill(path.circle(0, 0, r), [servercolor, trafo.scale(1, 0.5)])
h = 2 * r
p = path.path(path.moveto(-r, 0), path.lineto(-r, -h),
path.arc(0, -h, r, 180, 0), path.lineto(r, 0),
path.arcn(0, 0, r, 0, 180), path.closepath())
c.fill(p, [servercolor, trafo.scale(1, 0.5).translated(0, -0.08 * r)])
return c
c.text(width, labelypos, '$L$', [text.halign.center])
for q, label in ((qi, r'$q_\text{i}$'),
(qf, r'$q_\text{f}$')):
c.stroke(path.line(q, 0, q, height), [style.linestyle.dashed])
c.text(q, labelypos, label, [text.halign.center])
pathsegments = [path.path(path.moveto(qi, 0),
path.lineto(qf, 0)),
path.path(path.moveto(qf, 0),
path.lineto(width-radius, 0),
path.arc(width-radius, radius, radius, -90, 90),
path.lineto(qf, 2*radius)),
path.path(path.moveto(qf, 0),
path.lineto(qi, 0)),
path.path(path.moveto(qi, 0),
path.lineto(radius, 0),
path.arcn(radius, radius, radius, 270, 90),
path.lineto(qi, 2*radius))]
anzahl_segmente = (1, 2, 2, 3)
ypos = 0.5*dy
for n in range(1, ntraj+1):
offset = 0
if n % 2 == 0:
offset = -1
nsegmente = anzahl_segmente[(n-1) % 4] + (n-1)//4*4
for nsegment in range(1, nsegmente+1):
yshift = (-offset+nsegment-1)//2*2*radius
c.stroke(pathsegments[(offset+nsegment-1) % 4],
[trafo.translate(0, ypos+yshift),
linecolor, style.linewidth.Thick])
c.stroke(path.circle(qi, ypos, 0.06),
[style.linewidth.thick, linecolor, deco.filled([color.grey(1)])])
t.stroke(extra)
t.stroke(extra+[deco.earrow()])
c = canvas.canvas()
R = 1.7*r
for i in range(3):
theta = 2*i*pi/3
x, y = R*sin(theta), R*cos(theta)
tetra(x, y, [1, 0, 2][i], reflect=(i in [0,1]))
w = 30 + 120*i
c.stroke(path.path(path.arc(0., 0., 1.1*R, w-20, w+20)), [deco.earrow()])
c.stroke(path.path(path.arcn(0., 0., 1.1*R, w+20, w-20)), [deco.earrow()])
theta = 2*(i+0.5)*pi/3
x, y = 1.3*R*sin(theta), 1.3*R*cos(theta)
c.text(x, y, "$F$", center)
c.writePDFfile("pic-fmove-relation.pdf")
c = canvas.canvas()
R = 1.7*r
for i in range(3):
theta = 2*i*pi/3
x, y = R*sin(theta), R*cos(theta)
tetra(x, y, [2, 1, 0][i], reflect=(i in [0,2]))
