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- #!/usr/bin/env python
- '''
- Copyright (C) 2007 Terry Brown, terry_n_brown@yahoo.com
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- '''
- import inkex, simplepath, sys, copy
- from math import degrees, atan2
-
- class Edge3d(inkex.Effect):
- def __init__(self):
- inkex.Effect.__init__(self)
- opts = [('-a', '--angle', 'float', 'angle', 45.0,
- 'angle of illumination, clockwise, 45 = upper right'),
- ('-d', '--stddev', 'float', 'stddev', 5.0,
- 'stdDeviation for Gaussian Blur'),
- ('-H', '--blurheight', 'float', 'blurheight', 2.0,
- 'height for Gaussian Blur'),
- ('-W', '--blurwidth', 'float', 'blurwidth', 2.0,
- 'width for Gaussian Blur'),
- ('-s', '--shades', 'int', 'shades', 2,
- 'shades, 2 = black and white, 3 = black, grey, white, etc.'),
- ('-b', '--bw', 'inkbool', 'bw', False,
- 'black and white, create only the fully black and white wedges'),
- ('-p', '--thick', 'float', 'thick', 10.,
- 'stroke-width for path pieces'),
- ]
- for o in opts:
- self.OptionParser.add_option(o[0], o[1], action="store", type=o[2],
- dest=o[3], default=o[4], help=o[5])
- self.filtId = ''
-
- def angleBetween(self, start, end, angle):
- """Return true if angle (degrees, clockwise, 0 = up/north) is between
- angles start and end"""
- def f(x):
- """Maybe add 360 to x"""
- if x < 0: return x + 360.
- return x
- # rotate all inputs by start, => start = 0
- a = f(f(angle) - f(start))
- e = f(f(end) - f(start))
- return a < e
-
- def effectX(self):
- # size of a wedge for shade i, wedges come in pairs
- delta = 360. / self.options.shades / 2.
-
- for shade in range(0, self.options.shades):
- if self.options.bw and shade > 0 and shade < self.options.shades-1:
- continue
- self.start = [self.options.angle - delta * (shade+1)]
- self.end = [self.options.angle - delta * (shade)]
- self.start.append( self.options.angle + delta * (shade) )
- self.end.append( self.options.angle + delta * (shade+1) )
- self.makeShade(float(shade)/float(self.options.shades-1))
-
- def effect(self):
- """Check each internode to see if it's in one of the wedges
- for the current shade. shade is a floating point 0-1 white-black"""
- # size of a wedge for shade i, wedges come in pairs
- delta = 360. / self.options.shades / 2.
- for id, node in self.selected.iteritems():
- if node.tag == inkex.addNS('path','svg'):
- d = node.get('d')
- p = simplepath.parsePath(d)
- g = None
- for shade in range(0, self.options.shades):
- if (self.options.bw and shade > 0 and
- shade < self.options.shades - 1):
- continue
- self.start = [self.options.angle - delta * (shade+1)]
- self.end = [self.options.angle - delta * (shade)]
- self.start.append( self.options.angle + delta * (shade) )
- self.end.append( self.options.angle + delta * (shade+1) )
- level=float(shade)/float(self.options.shades-1)
- last = []
- result = []
- for cmd,params in p:
- if cmd == 'Z':
- last = []
- continue
- if last:
- a = degrees(atan2(params[-2:][0] - last[0],
- params[-2:][1] - last[1]))
- if (self.angleBetween(self.start[0], self.end[0], a) or
- self.angleBetween(self.start[1], self.end[1], a)):
- result.append(('M', last))
- result.append((cmd, params))
- last = params[-2:]
- if result:
- if g is None:
- g = self.getGroup(node)
- nn = copy.deepcopy(node)
- nn.set('d',simplepath.formatPath(result))
-
- col = 255 - int(255. * level)
- a = 'fill:none;stroke:#%02x%02x%02x;stroke-opacity:1;stroke-width:10;%s' % ((col,)*3 + (self.filtId,))
- nn.set('style',a)
- g.append(nn)
-
- def getGroup(self, node):
- defs = self.document.getroot().xpath('//svg:defs', namespaces=inkex.NSS)
- if defs:
- defs = defs[0]
- # make a clipped group, clip with clone of original, clipped group
- # include original and group of paths
- clip = inkex.etree.SubElement(defs,inkex.addNS('clipPath','svg'))
- clip.append(copy.deepcopy(node))
- clipId = self.uniqueId('clipPath')
- clip.set('id', clipId)
- clipG = inkex.etree.SubElement(node.getparent(),inkex.addNS('g','svg'))
- g = inkex.etree.SubElement(clipG,inkex.addNS('g','svg'))
- clipG.set('clip-path', 'url(#'+clipId+')')
- # make a blur filter reference by the style of each path
- filt = inkex.etree.SubElement(defs,inkex.addNS('filter','svg'))
- filtId = self.uniqueId('filter')
- self.filtId = 'filter:url(#%s);' % filtId
- for k, v in [('id', filtId), ('height', str(self.options.blurheight)),
- ('width', str(self.options.blurwidth)),
- ('x', '-0.5'), ('y', '-0.5')]:
- filt.set(k, v)
- fe = inkex.etree.SubElement(filt,inkex.addNS('feGaussianBlur','svg'))
- fe.set('stdDeviation', str(self.options.stddev))
- else:
- # can't find defs, just group paths
- g = inkex.etree.SubElement(node.getparent(),inkex.addNS('g','svg'))
- g.append(node)
-
- return g
-
- if __name__ == '__main__':
- e = Edge3d()
- e.affect()
-
-
- # vim: expandtab shiftwidth=4 tabstop=8 softtabstop=4 encoding=utf-8 textwidth=99
-