82 lines
2.9 KiB
Python
82 lines
2.9 KiB
Python
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from math import *
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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+2*spacing
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if self.move(size, size, move, before=True):
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return
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self.boxes.ctx.save()
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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.boxes.ctx.restore()
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self.move(size, size, move, before=True)
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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, callback=None, move=""):
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size = diameter+2*spacing
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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.boxes.ctx.save()
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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.moveTo(r+self.burn,0, 90)
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self.corner(360, r)
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self.boxes.ctx.restore()
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self.move(size, size, move, before=True)
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def waivyKnob(self, diameter, n=20, angle=45, callback=None, move=""):
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size = diameter+pi*diameter/n+2*self.boxes.spacing
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if self.move(size, size, move, before=True):
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return
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self.boxes.ctx.save()
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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.moveTo(diameter/2, 0, angle)
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a, r = arcOnCircle(360./n, angle, diameter/2)
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a2, r2 = arcOnCircle(360./n, -angle, diameter/2)
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for i in range(n//2):
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self.boxes.corner(a, r)
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self.boxes.corner(a2, r2)
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self.boxes.ctx.restore()
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self.move(size, size, move, before=True)
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def concaveKnob(self, diameter, n=3, rounded=0.2, angle=70, callback=None, move=""):
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size = diameter+2*self.boxes.spacing
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if self.move(size, size, move, before=True):
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return
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self.boxes.ctx.save()
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self.rectangularHole(size/2, size/2, size, size)
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self.moveTo(size/2, size/2)
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self.hole(0,0, 3)
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self.hole(0,0, diameter/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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print(360./n*(1-rounded), a, r)
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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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print(a, r)
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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)
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self.corner(angle)
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self.boxes.ctx.restore()
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self.move(size, size, move, before=True)
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