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#!/usr/bin/env python3
"""Randomise the selected item's colours using hsl colorspace"""
from random import randrange, uniform, seed
import inkex
from inkex.localization import inkex_gettext as _
def _rand(
limit, value, roof=255, method=randrange, circular=False, deterministic=False
):
"""Generates a random number which is less than limit % away from value, using the method
supplied."""
if deterministic:
if isinstance(value, float):
seed(int(value * 1000))
else:
seed(value)
limit = roof * float(limit) / 100
limit /= 2
max_ = type(roof)(value + limit)
min_ = type(roof)(value - limit)
if not (circular):
if max_ > roof:
min_ -= max_ - roof
max_ = roof
if min_ < 0:
max_ -= min_
min_ = 0
return method(min_, max_)
return method(min_, max_) % roof
class Randomize(inkex.ColorExtension):
"""Randomize the colours of all objects"""
deterministic_output = False
def add_arguments(self, pars):
pars.add_argument("--tab")
pars.add_argument("-y", "--hue_range", type=int, default=0, help="Hue range")
pars.add_argument(
"-t", "--saturation_range", type=int, default=0, help="Saturation range"
)
pars.add_argument(
"-m", "--lightness_range", type=int, default=0, help="Lightness range"
)
pars.add_argument(
"-o", "--opacity_range", type=int, default=0, help="Opacity range"
)
def _rand(self, limit, value, roof=255, method=randrange, circular=False):
return _rand(
limit,
value,
roof,
method,
circular,
deterministic=self.deterministic_output,
)
def modify_color(self, name, color):
hsl = color.to_hsl()
if self.options.hue_range > 0:
hsl.hue = int(self._rand(self.options.hue_range, hsl.hue, circular=True))
if self.options.saturation_range > 0:
hsl.saturation = int(
self._rand(self.options.saturation_range, hsl.saturation)
)
if self.options.lightness_range > 0:
hsl.lightness = int(self._rand(self.options.lightness_range, hsl.lightness))
return hsl.to_rgb()
def modify_opacity(self, name, opacity):
if name != "opacity":
return opacity
try:
opacity = float(opacity)
except ValueError:
self.msg(_("Ignoring unusual opacity value: {}").format(opacity))
return opacity
orange = self.options.opacity_range
if orange > 0:
return self._rand(orange, opacity, roof=1.0, method=uniform)
return opacity
if __name__ == "__main__":
Randomize().run()
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