63 lines
2.3 KiB
Python
63 lines
2.3 KiB
Python
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#!/usr/bin/env python3
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import sys
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import math
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import inkex
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from lxml import etree
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class clonesInPerspective(inkex.EffectExtension):
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def add_arguments(self, pars):
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pars.add_argument('--num', type = int, default = 5, help = 'Drag out center of rotation before calling')
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pars.add_argument('--ratio', type = float, default = 0.9, help = 'Ratio of size of nearest neighbor to first. Must be < 1')
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def effect(self):
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if len(self.svg.selected) != 1:
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inkex.errormsg("Select exactly 1 thing. If necessary, group your items before.")
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sys.exit(1)
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xpath = list(self.svg.selected.items())[0][0]
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sel = self.svg.selected[xpath]
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id = sel.get('id')
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try :
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tx = sel.attrib[inkex.addNS('transform-center-x','inkscape')]
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except KeyError:
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tx = '0.'
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try :
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ty = sel.attrib[inkex.addNS('transform-center-y','inkscape')]
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except KeyError:
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ty = '0.'
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if float(tx) == 0. and float(ty) == 0. :
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inkex.errormsg("Center of rotation ist at the center of object. Please move the center first.")
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sys.exit(1)
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bbox = sel.bounding_box()
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width = bbox.height
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height = bbox.width
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cx = float(bbox.left) + 0.5 * width #Find center of selected object
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cy = float(bbox.top) + 0.5 * height #Find center of selected object
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tx = float(tx)
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ty = float(ty)
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crat = 1.0
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otx = tx
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oty = ty
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parent = sel.getparent()
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j = parent.index(sel)
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for i in range(self.options.num) :
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crat *= self.options.ratio
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tx *= self.options.ratio
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ty *= self.options.ratio
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att = {
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"id" : self.svg.get_unique_id("clone" + id),
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inkex.addNS('href','xlink') : "#" + id,
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inkex.addNS('transform-center-x','inkscape') : str(tx),
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inkex.addNS('transform-center-y','inkscape') : str(ty),
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'transform' : ("matrix(%f,0,0,%f,%f,%f)" % (crat, crat,(1. - crat)*(cx + otx), (1. - crat)*(cy - oty))),
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"width" : "100%",
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"height" : "100%",
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}
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parent.insert(j, etree.Element('use', att))
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if __name__ == '__main__':
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clonesInPerspective().run()
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