106 lines
3.1 KiB
Python
106 lines
3.1 KiB
Python
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#!/usr/bin/env python3
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#
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# Copyright (C) 2021 Stefan Benediktsson
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#
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# GNU Affero General Public License v3.0
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# Permissions of this strongest copyleft license are
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# conditioned on making available complete source code
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# of licensed works and modifications, which include
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# larger works using a licensed work, under the same
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# license. Copyright and license notices must be preserved.
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# Contributors provide an express grant of patent rights.
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# When a modified version is used to provide a service
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# over a network, the complete source code of the modified
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# version must be made available.
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#
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"""
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Generate a Starshine as SVG.
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"""
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import random
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from math import acos, cos, radians, sin, sqrt, tan
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import inkex
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def points_to_svgd(p):
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"""
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p: list of 2 tuples (x, y coordinates)
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"""
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f = p[0]
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p = p[1:]
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svgd = 'M{:.3f},{:.3f}'.format(f[0], f[1])
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for x in p:
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svgd += 'L{:.3f},{:.3f}'.format(x[0], x[1])
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svgd +='Z'
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return svgd
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def checkSize(a, b):
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if a >= b:
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return b, a
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else:
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return a, b
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class Starshine(inkex.GenerateExtension):
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container_label = 'Rendered Starshine'
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def add_arguments(self, pars):
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pars.add_argument("--r1", type=int, default=20, help="Inner Radius min")
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pars.add_argument("--r2", type=int, default=20, help="Inner Radius max")
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pars.add_argument("--R1", type=int, default=350, help="Outer Radius min")
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pars.add_argument("--R2", type=int, default=350, help="Outer Radius min")
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pars.add_argument("--a1", type=int, default=5, help="Angle min")
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pars.add_argument("--a2", type=int, default=7, help="Angle max")
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def generate(self):
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r1 = self.options.r1
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r2 = self.options.r2
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R1 = self.options.R1
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R2 = self.options.R2
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a1 = self.options.a1
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a2 = self.options.a2
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# generate points: list of (x, y) pairs
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r1, r2 = checkSize(r1, r2)
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R1, R2 = checkSize(R1, R2)
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a1, a2 = checkSize(a1, a2)
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a = 0
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style = {'stroke': '#000000', 'fill': '#000000', 'stroke-width': str(self.svg.unittouu('1px'))}
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points = []
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while a < 360:
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dI = random.randint(r1,r2)
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dO = random.randint(R1,R2)
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ad = random.randint(a1,a2)
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x00 = cos(radians(a)) * dI
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y00 = sin(radians(a)) * dI
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x10 = cos(radians(a+ad/2)) * dO
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y10 = sin(radians(a+ad/2)) * dO
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x01 = cos(radians(a+ad)) * dI
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y01 = sin(radians(a+ad)) * dI
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points.append((x00, y00))
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points.append((x10, y10))
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points.append((x01, y01))
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a = a+ad
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path = points_to_svgd(points)
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yield inkex.PathElement(style=str(inkex.Style(style)), d=str(path))
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if __name__ == '__main__':
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Starshine().run()
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