from math import *
from boxes import vectors
[docs]def arcOnCircle(spanning_angle, outgoing_angle, r=1.0):
angle = spanning_angle + 2 * outgoing_angle
radius = r * sin(radians(0.5 * spanning_angle)) / sin(radians(180 - outgoing_angle - 0.5 * spanning_angle))
return angle, abs(radius)
[docs]class Parts:
def __init__(self, boxes):
self.boxes = boxes
"""
def roundKnob(self, diameter, n=20, callback=None, move=""):
size = diameter+diameter/n
if self.move(size, size, move, before=True):
return
self.moveTo(size/2, size/2)
self.cc(callback, None, 0, 0)
self.move(size, size, move)
"""
def __getattr__(self, name):
return getattr(self.boxes, name)
[docs] def disc(self, diameter, hole=0, callback=None, move=""):
"""Simple disc
:param diameter: diameter of the disc
:param hole: (Default value = 0)
:param callback: (Default value = None) called in the center
:param move: (Defaultvalue = None)
"""
size = diameter
r = diameter / 2.0
if self.move(size, size, move, before=True):
return
self.moveTo(size / 2, size / 2)
if hole:
self.hole(0, 0, hole / 2)
self.cc(callback, None, 0, 0)
self.moveTo(r + self.burn, 0, 90)
self.corner(360, r, tabs=6)
self.move(size, size, move)
[docs] def waivyKnob(self, diameter, n=20, angle=45, hole=0, callback=None, move=""):
"""Disc with a waivy edge to be easier to be gripped
:param diameter: diameter of the knob
:param n: (Default value = 20) number of waves
:param angle: (Default value = 45) maximum angle of the wave
:param hole: (Default value = 0)
:param callback: (Default value = None) called in the center
:param move: (Defaultvalue = None)
"""
if n < 2:
return
size = diameter + pi * diameter / n
if self.move(size, size, move, before=True):
return
self.moveTo(size / 2, size / 2)
self.cc(callback, None, 0, 0)
if hole:
self.hole(0, 0, hole / 2)
self.moveTo(diameter / 2, 0, 90-angle)
a, r = arcOnCircle(360. / n / 2, angle, diameter / 2)
a2, r2 = arcOnCircle(360. / n / 2, -angle, diameter / 2)
for i in range(n):
self.boxes.corner(a, r, tabs=(i % max(1, (n+1) // 6) == 0))
self.boxes.corner(a2, r2)
self.move(size, size, move)
[docs] def concaveKnob(self, diameter, n=3, rounded=0.2, angle=70, hole=0,
callback=None, move=""):
"""Knob with dents to be easier to be gripped
:param diameter: diameter of the knob
:param n: (Default value = 3) number of dents
:param rounded: (Default value = 0.2) proportion of circumferen remaining
:param angle: (Default value = 70) angle the dents meet the circumference
:param hole: (Default value = 0)
:param callback: (Default value = None) called in the center
:param move: (Defaultvalue = None)
"""
size = diameter
if n < 2:
return
if self.move(size, size, move, before=True):
return
self.moveTo(size / 2, size / 2)
if hole:
self.hole(0, 0, hole / 2)
self.cc(callback, None, 0, 0)
self.moveTo(diameter / 2, 0, 90 + angle)
a, r = arcOnCircle(360. / n * (1 - rounded), -angle, diameter / 2)
if abs(a) < 0.01: # avoid trying to make a straight line as an arc
a, r = arcOnCircle(360. / n * (1 - rounded), -angle - 0.01, diameter / 2)
for i in range(n):
self.boxes.corner(a, r)
self.corner(angle)
self.corner(360. / n * rounded, diameter / 2, tabs=
(i % max(1, (n+1) // 6) == 0))
self.corner(angle)
self.move(size, size, move)
[docs] def ringSegment(self, r_outside, r_inside, angle, n=1, move=None):
"""Ring Segment
:param r_outside: outer radius
:param r_inside: inner radius
:param angle: anlge the segment is spanning
:param n: (Default value = 1) number of segments
:param move: (Defaultvalue = None)
"""
space = 360 * r_inside / self.spacing
n = min(n, 360 / (angle+space))
# XXX be smarter about space
if self.move(r_outside, r_outside, move, True):
return
self.moveTo(r_outside)
for i in range(n):
self.polyline(
0, (angle, r_outside), 0, 90, (r_outside-r_inside, 2),
90, (angle, r_inside), 0, 90, (r_outside-r_inside, 2),
90)
x, y = vectors.circlepoint(r_outside, math.radians(angle+space))
self.moveTo(y, r_outside-x, angle+space)
self.move(r_outside, r_outside)
return n
