1 files changed, 83 insertions, 0 deletions
diff --git a/share/extensions/straightseg.py b/share/extensions/straightseg.py
new file mode 100755
index 0000000..55f4d45
--- /dev/null
+++ b/share/extensions/straightseg.py
@@ -0,0 +1,83 @@
+#!/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=50.0,
+            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):
+            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()