Added rotation extensions from LaserPrep

extensions/fablabchemnitz_rotate_helper.py

@@ -0,0 +1,59 @@
+#! /usr/bin/env python3
+'''
+Copyright (C) 2019 Grant Patterson <grant@revoltlabs.co>
+
+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
+'''
+
+from math import copysign, cos, pi, sin
+from inkex import Transform
+
+STEPS = 360
+
+def rotate_matrix(node, a):
+    bbox = node.bounding_box()
+    cx = bbox.center_x / 2.0
+    cy = bbox.center_y / 2.0
+    return Transform([[cos(a), -sin(a), cx], [sin(a), cos(a), cy]]) * Transform([[1, 0, -cx], [0, 1, -cy]])
+	
+def optimal_rotations(node):
+    step = pi / float(STEPS)
+    bbox = node.bounding_box()
+    min_width = bbox.right - bbox.left
+    min_width_angle = None
+    min_bbox_area = min_width * (bbox.bottom - bbox.top)
+    min_bbox_area_angle = None
+
+    for i in range(STEPS):
+        angle = -pi/2.0 + i*step
+        rotated = node.bounding_box(rotate_matrix(node, angle))		
+		
+        width = rotated.width
+        height = rotated.height
+        bbox_area = width * height
+
+        if width < min_width:
+            min_width = width
+            min_width_angle = angle
+        if bbox_area < min_bbox_area:
+            if width > height:
+                # To keep results similar to min_width_angle, rotate by an
+                # additional 90 degrees which doesn't affect bbox area.
+                angle -= copysign(pi/2.0, angle)
+                
+            min_bbox_area = bbox_area
+            min_bbox_area_angle = angle
+
+    return min_width_angle, min_bbox_area_angle

extensions/fablabchemnitz_rotate_min_all.inx

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+  <_name>Rotations - Find All Optimal</_name>
+  <id>fablabchemnitz.de.rotateminall</id>
+  <effect>
+    <object-type>all</object-type>
+      <effects-menu>
+            <submenu _name="FabLab Chemnitz">
+			    <submenu _name="Nesting/Cut Optimization" />
+			</submenu>
+      </effects-menu>
+  </effect>
+  <script>
+    <command reldir="extensions" interpreter="python">fablabchemnitz_rotate_min_all.py</command>
+  </script>
+</inkscape-extension>

extensions/fablabchemnitz_rotate_min_all.py

@@ -0,0 +1,66 @@
+#! /usr/bin/env python3
+'''
+Copyright (C) 2019 Grant Patterson <grant@revoltlabs.co>
+
+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 gettext
+import sys
+import inkex
+import fablabchemnitz_rotate_helper
+from inkex import Transform
+import copy
+
+debug = False
+
+error = lambda msg: inkex.errormsg(gettext.gettext(msg))
+if debug:
+    stderr = lambda msg: sys.stderr.write(msg + '\n')
+else:
+    stderr = lambda msg: None
+	
+class RotateMinAll(inkex.Effect):
+    def effect(self):
+        def duplicateNodes(aList):
+            clones={}
+            for id,node in aList.items():
+                clone=copy.deepcopy(node)
+                #!!!--> should it be given an id?
+                #seems to work without this!?!
+                myid = node.tag.split('}')[-1]
+                clone.set("id", self.svg.get_unique_id(myid))
+                node.getparent().append(clone)
+                clones[clone.get("id")]=clone
+            return(clones)
+	
+        for nid, node in self.svg.selected.items():
+            # set() removes duplicates
+            angles = set(
+                # and remove Nones
+                [x for x in fablabchemnitz_rotate_helper.optimal_rotations(node)
+                    if x is not None])
+            # Go backwards so we know if we need to duplicate the node for
+            # multiple rotations. (We don't want to rotate the main node
+            # before duplicating it.)
+            for i, angle in reversed(list(enumerate(angles))):
+                if i > 0:
+                    # Rotate a duplicate of the node
+                    rotate_node = list(duplicateNodes({nid: node}).items())[0][1]
+                else:
+                    rotate_node = node
+                rotate_node.transform = fablabchemnitz_rotate_helper.rotate_matrix(rotate_node, angle) * rotate_node.transform
+if __name__ == '__main__':
+    RotateMinAll().run()

extensions/fablabchemnitz_rotate_min_bbox.inx

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+  <_name>Rotations - Minimum Bounding Box Area</_name>
+  <id>fablabchemnitz.de.rotateminbbox</id>
+  <effect>
+    <object-type>all</object-type>
+      <effects-menu>
+            <submenu _name="FabLab Chemnitz">
+			    <submenu _name="Nesting/Cut Optimization" />
+			</submenu>
+      </effects-menu>
+  </effect>
+  <script>
+    <command reldir="extensions" interpreter="python">fablabchemnitz_rotate_min_bbox.py</command>
+  </script>
+</inkscape-extension>

extensions/fablabchemnitz_rotate_min_bbox.py

@@ -0,0 +1,41 @@
+#! /usr/bin/env python3
+'''
+Copyright (C) 2019 Grant Patterson <grant@revoltlabs.co>
+
+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 gettext
+import sys
+import inkex
+import fablabchemnitz_rotate_helper
+from inkex import Transform
+
+debug = False
+
+error = lambda msg: inkex.errormsg(gettext.gettext(msg))
+if debug:
+    stderr = lambda msg: sys.stderr.write(msg + '\n')
+else:
+    stderr = lambda msg: None
+
+class RotateMinBBox(inkex.Effect):
+    def effect(self):
+        for node in self.svg.selected.values():
+            min_bbox_angle = fablabchemnitz_rotate_helper.optimal_rotations(node)[1]
+            if min_bbox_angle is not None:
+                node.transform = Transform(fablabchemnitz_rotate_helper.rotate_matrix(node, min_bbox_angle)) * node.transform 	
+if __name__ == '__main__':
+    RotateMinBBox().run()

extensions/fablabchemnitz_rotate_min_width.inx

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<inkscape-extension xmlns="http://www.inkscape.org/namespace/inkscape/extension">
+  <_name>Rotations - Minimum Width</_name>
+  <id>fablabchemnitz.de.rotateminwidth</id>
+  <effect>
+    <object-type>all</object-type>
+      <effects-menu>
+            <submenu _name="FabLab Chemnitz">
+			    <submenu _name="Nesting/Cut Optimization" />
+			</submenu>
+      </effects-menu>
+  </effect>
+  <script>
+    <command reldir="extensions" interpreter="python">fablabchemnitz_rotate_min_width.py</command>
+  </script>
+</inkscape-extension>

extensions/fablabchemnitz_rotate_min_width.py

@@ -0,0 +1,42 @@
+#! /usr/bin/env python3
+'''
+Copyright (C) 2019 Grant Patterson <grant@revoltlabs.co>
+
+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 gettext
+import sys
+import inkex
+import fablabchemnitz_rotate_helper
+from inkex import Transform
+
+debug = False
+
+error = lambda msg: inkex.errormsg(gettext.gettext(msg))
+if debug:
+    stderr = lambda msg: sys.stderr.write(msg + '\n')
+else:
+    stderr = lambda msg: None
+
+class RotateMinWidth(inkex.Effect):
+    def effect(self):
+        for node in self.svg.selected.values():
+            min_width_angle = fablabchemnitz_rotate_helper.optimal_rotations(node)[0]
+            if min_width_angle is not None:
+                node.transform = fablabchemnitz_rotate_helper.rotate_matrix(node, min_width_angle) * node.transform
+
+if __name__ == '__main__':
+    RotateMinWidth().run()