1 files changed, 62 insertions, 0 deletions
diff --git a/share/extensions/straightseg.py b/share/extensions/straightseg.py
new file mode 100755
index 0000000..172cebb
--- /dev/null
+++ b/share/extensions/straightseg.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python
+# coding=utf-8
+#
+# Copyright (C) 2005 Aaron Spike, aaron@ekips.org
+#
+# 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., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+#
+"""Straintens path segments (but doesn't turn them into lines)"""
+import inkex
+
+from inkex.bezier import percent_point
+
+class SegmentStraightener(inkex.EffectExtension):
+    """Make segments straiter"""
+    def add_arguments(self, pars):
+        pars.add_argument("-p", "--percent", type=float, default=10.0,\
+            help="move curve handles PERCENT percent closer to a straight line")
+        pars.add_argument("-b", "--behavior", type=int, default=1,\
+            help="straightening behavior for cubic segments")
+
+    def effect(self):
+        for node in self.svg.selection.get(inkex.PathElement).values():
+            path = node.path.to_arrays()
+            last = []
+            sub_start = []
+            for cmd, params in path:
+                if cmd == 'C':
+                    if self.options.behavior <= 1:
+                        #shorten handles towards end points
+                        params[:2] = percent_point(params[:2], last[:], self.options.percent)
+                        params[2:4] = percent_point(params[2:4], params[-2:], self.options.percent)
+                    else:
+                        #shorten handles towards thirds of the segment
+                        dest1 = percent_point(last[:], params[-2:], 33.3)
+                        dest2 = percent_point(params[-2:], last[:], 33.3)
+                        params[:2] = percent_point(params[:2], dest1[:], self.options.percent)
+                        params[2:4] = percent_point(params[2:4], dest2[:], self.options.percent)
+                elif cmd == 'Q':
+                    dest = percent_point(last[:], params[-2:], 50)
+                    params[:2] = percent_point(params[:2], dest, self.options.percent)
+                if cmd == 'M':
+                    sub_start = params[-2:]
+                if cmd == 'Z':
+                    last = sub_start[:]
+                else:
+                    last = params[-2:]
+            node.path = path
+
+if __name__ == '__main__':
+    SegmentStraightener().run()