97 lines
4.6 KiB
Python
97 lines
4.6 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
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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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# 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 Template(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="template1", help="Origami pattern")
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self.add_argument('--length', type=float, default=10.0, help="Length of grid square")
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self.add_argument('--theta', type=int, default=0, help="Rotation angle (degree)")
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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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length = self.options.length * unit_factor
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vertex_radius = self.options.vertex_radius * unit_factor
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pattern = self.options.pattern
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theta = self.options.theta * pi / 180
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# create all Path instances defining strokes
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# first define its points as a list of tuples...
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mountain_h_stroke_points = [(length / 2, 0),
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(length / 2, length)]
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mountain_v_stroke_points = [(0, length / 2),
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(length, length / 2)]
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# ... and then create the Path instances, defining its type ('m' for mountain, etc...)
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mountains = [Path(mountain_h_stroke_points, 'm' if pattern == 'template1' else 'v'),
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Path(mountain_v_stroke_points, 'm' if pattern == 'template1' else 'v')]
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# doing the same for valleys
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valley_1st_stroke_points = [(0, 0),
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(length, length)]
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valley_2nd_stroke_points = [(0, length),
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(length, 0)]
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valleys = [Path(valley_1st_stroke_points, 'v' if pattern == 'template1' else 'm'),
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Path(valley_2nd_stroke_points, 'v' if pattern == 'template1' else 'm')]
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vertices = []
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for i in range(3):
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for j in range(3):
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vertices.append(Path(((i/2.) * length, (j/2.) * length), style='p', radius=vertex_radius))
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# multiplication is implemented as a rotation, and list_rotate implements rotation for list of Path instances
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vertices = Path.list_rotate(vertices, theta, (1 * length, 1 * length))
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mountains = Path.list_rotate(mountains, theta, (1 * length, 1 * length))
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valleys = Path.list_rotate(valleys, theta, (1 * length, 1 * length))
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# if Path constructor is called with more than two points, a single stroke connecting all of then will be
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# created. Using method generate_separated_paths, you can instead return a list of separated strokes
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# linking each two points
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# create a list for edge strokes
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edge_points = [(0 * length, 0 * length), # top left
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(1 * length, 0 * length), # top right
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(1 * length, 1 * length), # bottom right
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(0 * length, 1 * length)] # bottom left
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# create path from points to be able to use the already built rotate method
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edges = Path(edge_points, 'e', closed=True)
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edges = Path.list_rotate(edges, theta, (1 * length, 1 * length))
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# division is implemented as a reflection, and list_reflect implements it for a list of Path instances
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# here's a commented example:
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# line_reflect = (0 * length, 2 * length, 1 * length, 1 * length)
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# mountains = Path.list_reflect(mountains, line_reflect)
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# valleys = Path.list_reflect(valleys, line_reflect)
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# edges = Path.list_reflect(edges, line_reflect)
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# IMPORTANT: at the end, save edge points as "self.edge_points", to simplify selection of single or multiple
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# strokes for the edge
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self.edge_points = edges.points
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# IMPORTANT: the attribute "path_tree" must be created at the end, saving all strokes
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self.path_tree = [mountains, valleys, vertices]
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# if you decide not to declare "self.edge_points", then the edge must be explicitly created in the path_tree:
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# self.path_tree = [mountains, valleys, vertices, edges]
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# Main function, creates an instance of the Class and calls self.draw() to draw the origami on inkscape
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# self.draw() is either a call to inkex.affect() or to svg.run(), depending on python version
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if __name__ == '__main__':
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Template().run()
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