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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
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