91 lines
3.7 KiB
Python
91 lines
3.7 KiB
Python
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#! /usr/bin/env python3
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import inkex
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import numpy as np
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from math import pi, sin, cos
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from Path import Path
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from Pattern import Pattern
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# Select name of class, inherits from Pattern
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# TODO:
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# 1) Implement __init__ method to get all custom options and then call Pattern's __init__
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# 2) Implement generate_path_tree to define all of the desired strokes
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class PleatCircular(Pattern):
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def __init__(self):
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Pattern.__init__(self)
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self.add_argument("-p", "--pattern", default="pleat_circular", help="Origami pattern")
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self.add_argument("--radius", type=float, default=55.0, help="Radius of circle")
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self.add_argument("--ratio", type=float, default=0.4, help="Opening ratio")
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self.add_argument("--rings", type=int, default=15, help="Number of rings")
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self.add_argument("--simulation_mode", type=inkex.Boolean, default=True, help="Approximate circle and draw semicreases for simulation?")
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self.add_argument("--sides", type=int, default=20, help="Number of sides for polygon approximating half circle")
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def generate_path_tree(self):
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""" Specialized path generation for your origami pattern
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"""
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# retrieve saved parameters
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unit_factor = self.calc_unit_factor()
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R = self.options.radius * unit_factor
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ratio = self.options.ratio
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r = R * ratio
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rings = self.options.rings
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dr = (1.-ratio)*R/rings
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self.translate = (R, R)
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if not self.options.simulation_mode:
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inner_circles = []
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for i in range(1, rings):
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inner_circles.append(Path((0, 0), radius=r + i*dr, style='m' if i % 2 else 'v'))
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edges = [Path((0, 0), radius=R, style='e'),
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Path((0, 0), radius=r, style='e')]
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self.path_tree = [inner_circles, edges]
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# append semicreases for simulation
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else:
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sides = self.options.sides
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dtheta = pi / sides
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# create diagonals
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diagonals = []
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for i in range(sides):
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p1 = (0, 0)
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p2 = (R * cos((1 + i * 2) * dtheta), R * sin((1 + i * 2) * dtheta))
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diagonals.append(Path([p1, p2], 'u'))
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s = sin(dtheta)
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c = cos(dtheta)
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# Edge
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paths = [Path([(c * R, -s * R), (R, 0), (c * R, s * R)], style='e'),
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Path([(c * r, -s * r), (r, 0), (c * r, s * r)], style='e')]
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# MV circles
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for i in range(1, rings):
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r_i = r + i * dr
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paths.append(Path([(c * r_i, -s * r_i), (r_i, 0), (c * r_i, s * r_i)],
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style='m' if i % 2 else 'v'))
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# Semicreases
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top = []
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bottom = []
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for i in range(rings + 1):
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r_i = r + i*dr
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top.append((r_i*(1 + (i % 2)*(c-1)), -(i % 2)*s*r_i))
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bottom.append((r_i*(1 + (i % 2)*(c-1)), (i % 2)*s*r_i))
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paths = paths + [Path([(r, 0), (R, 0)], 's'), # straight line 1
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Path([(r*c, r*s), (R*c, R*s)], 's', invert=True), # straight line 2
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Path(top, 's'), # top half of semicrease pattern
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Path(bottom, 's')] # bottom half of semicrease pattern
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all_paths = [paths]
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for i in range(1, sides):
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all_paths.append(Path.list_rotate(all_paths[0], i*2*dtheta))
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self.path_tree = all_paths
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# Main function, creates an instance of the Class and calls inkex.affect() to draw the origami on inkscape
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if __name__ == '__main__':
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PleatCircular().run()
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