123 lines
4.2 KiB
Python
123 lines
4.2 KiB
Python
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#!/usr/bin/env python3
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#
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# Copyright (C) 2021 roberta bennett repeatingshadow@protonmail.com
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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"""
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Create svg path animation as SMIL from frames.
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Place each frame of the animation in a layer named 'frame'.
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Each of these layers should have the same number of paths,
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and each path should have the same number of points as the corresponding
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path in other layers.
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Note if there are more than one path in the frames, the Z order of the paths
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must match. It helps to use the XML editor option to observe the z order.
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The animation is applied to the paths in the first layer in the sequence, so the
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properties of that layer are used. In particular, the first layer ought to be set
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visible.
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Animations with different numbers of frames can be put into different sequences,
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named 'sequence', using sub-groups:
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Layers:
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not_animated_layer1
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sequence
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frame
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path1a
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path2a
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frame
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path1b
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path2b
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frame
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path1c
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path2c
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frame
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path1d
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path2d
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sequence
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frame
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frame
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frame
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Layer names must contain 'frame' and groups names contain 'sequence',
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eg, frame1 frame 2 frame 30, sequence 1, rythm sequence, rocket sequence
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"""
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import inkex
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class AnimateElement(inkex.BaseElement):
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"""animation Elements do not have a visible representation on the canvas"""
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tag_name = 'animate'
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@classmethod
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def new(cls, **attrs):
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return super().new( **attrs)
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class AnimationExtension(inkex.EffectExtension):
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def add_arguments(self, pars):
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pars.add_argument("--delete", type=inkex.Boolean, help="Remove frames")
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pars.add_argument("--begin_str", default="0", help="begin string: eg 0;an2.end;an3.begin")
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pars.add_argument("--repeat_str", default="indefinite", help="indefinite or an integer")
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pars.add_argument("--dur_str", default="7.9", help="duration in seconds. Do not decorate with units")
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def crunchFrames(self,frames):
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if frames is None:
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raise inkex.AbortExtension("layer named frame does not exist.")
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frame0paths = frames[0].findall('svg:path')
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Dlists = ["{}".format(p.get_path()) for p in frame0paths]
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for frame in frames[1:]:
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paths = frame.findall("svg:path")
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for i, p in enumerate(paths):
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Dlists[i] += ";\n{}".format(p.get_path())
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for i, dl in enumerate(Dlists):
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animel = AnimateElement(
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attributeName="d",
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attributeType="XML",
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begin=self.options.begin_str,
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dur=self.options.dur_str,
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repeatCount=self.options.repeat_str,
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values=dl)
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frame0paths[i].append(animel)
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for frame in frames[1:]:
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if self.options.delete:
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frame.delete()
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return
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def effect(self):
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sequences = [ elem for elem in self.svg.findall("svg:g[@inkscape:label]")
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if "sequence" in (elem.get('inkscape:label'))
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]
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if len(sequences)==0:
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frames = [ elem for elem in self.svg.findall("svg:g[@inkscape:label]")
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if "frame" in (elem.get('inkscape:label'))
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]
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self.crunchFrames(frames)
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return
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for sequence in sequences:
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frames = [ elem for elem in sequence.findall("svg:g[@inkscape:label]")
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if "frame" in (elem.get('inkscape:label'))
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]
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self.crunchFrames(frames)
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if __name__ == '__main__':
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AnimationExtension().run()
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