fixed handling of empty "filename_templates" in "get_filename_via_dialog"

fix floating inaccuracy problem in ContourFollow
added string representation for Bounds instances


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@722 bbaffbd6-741e-11dd-a85d-61de82d9cad9

src/pycam/Gui/Project.py

@@ -2894,8 +2894,10 @@ class ProjectGui:
             for file_filter in get_filters_from_list(type_filter):
                 dialog.add_filter(file_filter)
         # guess the export filename based on the model's filename
-        valid_templates = [one_template for one_template in filename_templates
-                if one_template]
+        if filename_templates is None:
+            valid_templates = []
+        else:
+            valid_templates = [t for t in filename_templates if one_template]
         if valid_templates:
             filename_template = valid_templates[0]
             # remove the extension

src/pycam/PathGenerators/ContourFollow.py

@@ -349,10 +349,15 @@ class ContourFollow:
                     # the highest point of the triangle is at z
                     outer_edges = []
                 else:
-                    # this should not happen
-                    raise ValueError(("Could not find a waterline, but " \
-                            + "there are points above z level (%f): %s / %s") \
-                            % (z, triangle, points_above))
+                    if abs(triangle.minz - z) < epsilon:
+                        # This is just an accuracy issue (see the
+                        # "triangle.minz >= z" statement above).
+                        outer_edges = []
+                    else:
+                        # this should not happen
+                        raise ValueError(("Could not find a waterline, but " \
+                                + "there are points above z level (%f): " \
+                                + "%s / %s") % (z, triangle, points_above))
             else:
                 # remove points that are not part of the waterline
                 points_above = [p for p in points_above
@@ -451,6 +456,7 @@ class ContourFollow:
                 proj_cp = plane.get_point_projection(cp)
                 # e.g. the Spherical Cutter often does not collide exactly above
                 # the potential collision line.
+                # TODO: maybe an "is cp inside of the triangle" check would be good?
                 if (triangle is hit_t) or (edge.is_point_inside(proj_cp)):
                     result.append((cl, edge))
                     # continue with the next outer_edge

src/pycam/Toolpath/__init__.py

@@ -177,6 +177,11 @@ class Bounds:
         self.set_bounds(bounds_low, bounds_high)
         self.reference = reference
 
+    def __repr__(self):
+        bounds_type_labels = ("relative", "fixed", "custom")
+        return "Bounds(%s, %s, %s)" % (bounds_type_labels[self.bounds_type],
+                self.bounds_low, self.bounds_high)
+
     def is_valid(self):
         for index in range(3):
             if self.bounds_low[index] > self.bounds_high[index]: