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