100 lines
3.9 KiB
Python
Executable File
100 lines
3.9 KiB
Python
Executable File
#!/usr/bin/env python3
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import math
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import sys
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import argparse
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import svgturtle
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parser = argparse.ArgumentParser(description='Generate a hexagonal battery case')
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parser.add_argument('--dimension', default=5, type=int, help='Grid dimension')
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parser.add_argument('--height', type=float, help='Height of battery')
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parser.add_argument('--hole', default='AA', help='Hole diameter (mm or A, AA, AAA)')
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parser.add_argument('--kerf', default=.1, type=float, help='Kerf')
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parser.add_argument('--horizontal-finger', default=10.0, type=float, help='Width of horizontal fingers')
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parser.add_argument('--vertical-finger', default=5.0, type=float, help='Width of vertical fingers')
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parser.add_argument('--padding', default=1.5, type=float, help='Padding around holes')
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parser.add_argument('--outside-padding', default=2, type=float, help='Extra padding between holes and wall')
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parser.add_argument('--thickness', default=3.0, type=float, help='Thickness of material')
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parser.add_argument('--lid', default=0.2, type=float, help='How much extra play to give the lid')
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args = parser.parse_args()
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assert (args.dimension % 2) == 1
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BATTERY = {
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'AAA': [10.5, 44.5],
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'AA': [14.5, 50.5],
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'C': [26.2, 50.0],
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'D': [34.2, 61.5],
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}
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if args.hole in BATTERY:
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dim = BATTERY[args.hole]
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args.hole = dim[0]
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if args.height == None:
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args.height = dim[1]
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else:
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args.hole = float(args.hole)
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assert(args.height != None)
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GRID = args.hole+args.padding
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RADIUS = args.hole/2
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DIMX = 2*(args.dimension+1)*GRID
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DIMY = 2*(args.dimension+1)*GRID
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PI3 = math.pi/3
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def draw_grid(cx, cy):
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for row in range(-int(args.dimension/2), int((args.dimension+1)/2)):
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cyr = cy+GRID*row*math.sin(PI3)
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num_col = args.dimension-abs(row)
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cxr = cx-.5*GRID*(num_col-1.0)
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for col in range(num_col):
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print('<circle cx="%.2f" cy="%.2f" r="%.2f" stroke="black" fill="none"/>' % (cxr+col*GRID, cyr, RADIUS))
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def draw_plane(cx, cy, interior=False):
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radius = GRID*args.dimension*0.5+args.outside_padding
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if not interior:
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radius += args.thickness
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turtle = svgturtle.SvgTurtle(cx, cy)
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turtle.penup()
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turtle.forward(radius)
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turtle.right(120)
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turtle.pendown()
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if interior:
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leg = (radius-args.horizontal_finger-args.kerf)/2
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for side in range(6):
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turtle.forward(leg)
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turtle.left(90)
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turtle.forward(args.thickness)
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turtle.right(90)
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turtle.forward(args.horizontal_finger+args.kerf)
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turtle.right(90)
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turtle.forward(args.thickness)
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turtle.left(90)
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turtle.forward(leg)
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turtle.right(60)
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else:
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num_fingers = int(radius/args.horizontal_finger/2)
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leg = (radius-(2*num_fingers-1)*args.horizontal_finger-args.kerf)/2
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for side in range(6):
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turtle.forward(leg)
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for finger in range(num_fingers):
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turtle.right(90)
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turtle.forward(args.thickness)
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turtle.left(90)
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turtle.forward(args.horizontal_finger+args.kerf)
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turtle.left(90)
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turtle.forward(args.thickness)
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turtle.right(90)
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turtle.forward(leg if finger == num_fingers-1 else args.horizontal_finger-args.kerf)
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turtle.right(60)
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print('<path d="%s" fill="none" stroke="black"/>' % turtle.to_s())
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print('<svg viewBox="0 0 %.2f %.2f" width="%.2fmm" height="%.2fmm" stroke-width="0.1" xmlns="http://www.w3.org/2000/svg">' % (DIMX, DIMY, DIMX, DIMY))
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draw_grid(GRID*(0.5*args.dimension+0.5), GRID*(0.5*args.dimension+1))
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draw_grid(GRID*(1.5*args.dimension+1.5), GRID*(0.5*args.dimension+1))
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draw_plane(GRID*(0.5*args.dimension+0.5), GRID*(0.5*args.dimension+1), True)
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draw_plane(GRID*(1.5*args.dimension+1.5), GRID*(0.5*args.dimension+1), True)
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draw_plane(GRID*(0.5*args.dimension+0.5), GRID*(1.5*args.dimension+1))
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draw_plane(GRID*(1.5*args.dimension+1.5), GRID*(1.5*args.dimension+1))
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print('</svg>')
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