updated contour scanner

extensions/fablabchemnitz/contourscanner/contour_scanner.inx

@@ -4,10 +4,8 @@
     <id>fablabchemnitz.de.contour_scanner</id>
     <param name="main_tabs" type="notebook">
         <page name="tab_active" gui-text="Active">
-            <label appearance="header">General</label>
+			<hbox>
-            <param name="breakapart" type="bool" gui-text="Break apart selection into single contours" gui-description="(with ignoring the group hirarchy by taking all children elements)">false</param>
+				<vbox>
-            <param name="removefillsetstroke" type="bool" gui-text="Remove fill and define stroke">false</param>
-            <param name="strokewidth" min="0.0" max="10000.0" gui-text="Stroke width (px)" type="float">1.0</param>
 					<label appearance="header">Highlight paths</label>
 					<param name="highlight_opened" type="bool" gui-text="Highlight opened contours">true</param>
 					<param name="color_opened" type="color" appearance="colorbutton" gui-text="Color opened contours">4012452351</param>
@@ -20,10 +18,22 @@
 					<param name="dotsize" type="int" min="0" max="10000" gui-text="Dot size (px) for self-intersecting points">10</param>
 					<param name="addlines" type="bool" gui-text="Add closing lines for open self-crossing contours" gui-description="They will have the same color as the intersection points and help to better visualize possible virtual crossings. The algorithm can only detect intersections for closed contours by it's nature, but we handle open contours like they were closed. This may put put too much intersection points.">true</param>
 					<param name="polypaths" type="bool" gui-text="Add polypath outline for self-crossing contours" gui-description="This makes only sense if your path is actually a curve. If it's already a polyline you just get a duplicate line (but with reduced nodes)">true</param>
+				</vbox>
+				<separator/>
+				<vbox>
 					<label appearance="header">Remove paths</label>
 					<param name="remove_opened" type="bool" gui-text="Remove opened contours">false</param>
 					<param name="remove_closed" type="bool" gui-text="Remove closed contours">false</param>
 					<param name="remove_selfintersecting" type="bool" gui-text="Remove self-intersecting contours">false</param>
+					<separator/>
+					<label appearance="header">General</label>
+					<param name="apply_transformations" type="bool" gui-text="Use 'Apply Transformations' extension" gui-description="Run 'Apply Transformations' extension before running to avoid IndexErrors in calculation.">false</param>
+					<param name="breakapart" type="bool" gui-text="Break apart selection into single contours" gui-description="(with ignoring the group hirarchy by taking all children elements)">false</param>
+					<param name="removefillsetstroke" type="bool" gui-text="Remove fill and define stroke">false</param>
+					<param name="strokewidth" min="0.0" max="10000.0" gui-text="Stroke width (px)" type="float">1.0</param>
+					<param name="show_debug" type="bool" gui-text="Show debug info">false</param>
+				</vbox>
+			</hbox>
         </page>
         <page name="tab_info" gui-text="About">
             <label appearance="header">About</label>

extensions/fablabchemnitz/contourscanner/contour_scanner.py

@@ -17,19 +17,22 @@ Last patch: 05.09.2020
 License: GNU GPL v3
 """
 
+import sys
 from math import *
-import inkex
-from inkex.paths import Path, CubicSuperPath
-from inkex import Style, Color, Circle
 from lxml import etree
 import poly_point_isect
 import copy
+import inkex
+from inkex.paths import Path, CubicSuperPath
+from inkex import Style, Color, Circle
 
 class ContourScanner(inkex.Effect):
 
     def __init__(self):
         inkex.Effect.__init__(self)
+        self.arg_parser.add_argument("--main_tabs")
         self.arg_parser.add_argument("--breakapart", type=inkex.Boolean, default=False, help="Break apart selection into single contours")
+        self.arg_parser.add_argument("--apply_transformations", type=inkex.Boolean, default=False, help="Run 'Apply Transformations' extension before running to avoid IndexErrors in calculation.")
         self.arg_parser.add_argument("--removefillsetstroke", type=inkex.Boolean, default=False, help="Remove fill and define stroke")
         self.arg_parser.add_argument("--strokewidth", type=float, default=1.0, help="Stroke width (px)")
         self.arg_parser.add_argument("--highlight_opened", type=inkex.Boolean, default=True, help="Highlight opened contours")
@@ -46,7 +49,7 @@ class ContourScanner(inkex.Effect):
         self.arg_parser.add_argument("--remove_opened", type=inkex.Boolean, default=False, help="Remove opened contours")
         self.arg_parser.add_argument("--remove_closed", type=inkex.Boolean, default=False, help="Remove closed contours")
         self.arg_parser.add_argument("--remove_selfintersecting", type=inkex.Boolean, default=False, help="Remove self-intersecting contours")
-        self.arg_parser.add_argument("--main_tabs")
+        self.arg_parser.add_argument("--show_debug", type=inkex.Boolean, default=False, help="Show debug info")
 
     #function to refine the style of the lines  
     def adjustStyle(self, node):
@@ -241,7 +244,12 @@ class ContourScanner(inkex.Effect):
                         #    polySegsNode.attrib['style'] = closingLineStyle
 
                     except AssertionError as e: # we skip AssertionError
-                        #inkex.utils.debug("Error: " + str(e))
+                        if self.options.show_debug is True:
+                            inkex.utils.debug("AssertionError at " + node.get('id'))
+                        continue
+                    except IndexError as i: # we skip IndexError
+                        if self.options.show_debug is True:
+                            inkex.utils.debug("IndexError at " + node.get('id'))
                         continue 
                 #if the intersectionGroup was created but nothing attached we delete it again to prevent messing the SVG XML tree
                 if len(intersectionGroup.getchildren()) == 0:
@@ -257,6 +265,25 @@ class ContourScanner(inkex.Effect):
                 self.scanContours(child) 
  
     def effect(self):
+    
+        applyTransformAvailable = False
+        # at first we apply external extension
+        try:
+            sys.path.append("..") # add parent directory to path to allow importing applytransform (vpype extension is encapsulated in sub directory)
+            import applytransform
+            applyTransformAvailable = True
+        except Exception as e:
+            #inkex.utils.debug(e)
+            inkex.utils.debug("Calling 'Apply Transformations' extension failed. Maybe the extension is not installed. You can download it from official InkScape Gallery. Skipping this step")
+    
+        '''
+        we need to apply transfoms to the complete document even if there are only some single paths selected. 
+        If we apply it to selected nodes only the parent groups still might contain transforms. 
+        This messes with the coordinates and creates hardly controllable behaviour
+        '''
+        if self.options.apply_transformations is True and applyTransformAvailable is True:
+            applytransform.ApplyTransform().recursiveFuseTransform(self.document.getroot())
+    
         if self.options.breakapart:    
             if len(self.svg.selected) == 0:
                  self.breakContours(self.document.getroot())