86 lines
3.9 KiB
Python
86 lines
3.9 KiB
Python
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#! /usr/bin/env python3
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import numpy as np
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from math import pi, sin, cos
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import inkex
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from Path import Path
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from Pattern import Pattern
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class SupportRing(Pattern):
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def __init__(self):
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Pattern.__init__(self) # Must be called in order to parse common options
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# save all custom parameters defined on .inx file
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self.add_argument('--sides', type=int, default=3)
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self.add_argument('--radius_external', type=float, default=10.0)
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self.add_argument('--radius_ratio', type=float, default=0.5)
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self.add_argument('--radius_type', default='polygonal')
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self.add_argument('--radius_draw', type=inkex.Boolean, default=True)
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self.add_argument('--connector_length', type=float, default=3.0)
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self.add_argument('--connector_thickness', type=float, default=3.0)
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self.add_argument('--head_length', type=float, default=1.0)
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self.add_argument('--head_thickness', type=float, default=1.0)
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self.add_argument('--pattern', default='support ring')
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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 conversion factor for selected unit
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unit_factor = self.calc_unit_factor()
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# retrieve saved parameters, and apply unit factor where needed
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radius_external = self.options.radius_external * unit_factor
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radius_type = self.options.radius_type
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radius_ratio = self.options.radius_ratio
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radius_internal = radius_external * radius_ratio
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dradius = radius_external-radius_internal
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sides = self.options.sides
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connector_length = self.options.connector_length * unit_factor
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connector_thickness = self.options.connector_thickness * unit_factor
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head_length = self.options.head_length * unit_factor
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head_thickness = self.options.head_thickness * unit_factor
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angle = pi / sides
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length_external = 2 * radius_external * sin(angle)
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length_internal = length_external * radius_ratio
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external_points = [(-length_external/2, 0),
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(-connector_thickness / 2, 0),
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(-connector_thickness / 2, -connector_length),
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(-connector_thickness / 2 - head_thickness / 2, -connector_length),
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(-connector_thickness / 2, -connector_length - head_length),
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(0, -connector_length - head_length),
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(+connector_thickness / 2, -connector_length - head_length),
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(+connector_thickness / 2 + head_thickness / 2, -connector_length),
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(+connector_thickness / 2, -connector_length),
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(+connector_thickness / 2, 0),
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(length_external/2, 0)]
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internal_points = [(0, 0), (length_internal, 0)]
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external_lines_0 = Path(external_points, 'm') + (length_external / 2, 0)
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external_lines = [external_lines_0]
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for i in range(sides-1):
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x, y = external_lines[-1].points[-1]
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external_lines.append(external_lines_0*(1, 2*(i+1)*angle) + (x, y))
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self.path_tree = [external_lines]
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if self.options.radius_draw == True:
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if radius_type == 'polygonal':
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internal_lines_0 = Path(internal_points, 'm')
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internal_lines = [internal_lines_0]
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for i in range(sides - 1):
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x, y = internal_lines[-1].points[-1]
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internal_lines.append(internal_lines_0*(1, 2*(i+1)*angle) + (x, y))
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internal_lines = Path.list_add(internal_lines, ((length_external - length_internal) / 2, dradius * cos(angle)))
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elif radius_type == 'circular':
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internal_lines = Path((length_external / 2, radius_internal + dradius/2), radius=radius_internal, style = 'm')
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self.path_tree.append(internal_lines)
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if __name__ == '__main__':
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SupportRing().run()
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