Merge pull request #2758 from fieldOfView/feature_mesh_types

Improved mesh type UX (Per Model Settings)

cura/Arrange.py

@@ -52,6 +52,8 @@ class Arrange:
         # Place all objects fixed nodes
         for fixed_node in fixed_nodes:
             vertices = fixed_node.callDecoration("getConvexHull")
+            if not vertices:
+                continue
             points = copy.deepcopy(vertices._points)
             shape_arr = ShapeArray.fromPolygon(points, scale = scale)
             arranger.place(0, 0, shape_arr)

cura/ConvexHullDecorator.py

@@ -56,6 +56,11 @@ class ConvexHullDecorator(SceneNodeDecorator):
         if self._node is None:
             return None
 
+        if getattr(self._node, "_non_printing_mesh", False):
+            # infill_mesh, cutting_mesh and anti_overhang_mesh do not need a convex hull
+            # node._non_printing_mesh is set in SettingOverrideDecorator
+            return None
+
         hull = self._compute2DConvexHull()
 
         if self._global_stack and self._node:

cura/Settings/SettingOverrideDecorator.py

@@ -22,6 +22,14 @@ class SettingOverrideDecorator(SceneNodeDecorator):
     ##  Event indicating that the user selected a different extruder.
     activeExtruderChanged = Signal()
 
+    ##  Non-printing meshes
+    #
+    #   If these settings are True for any mesh, the mesh does not need a convex hull,
+    #   and is sent to the slicer regardless of whether it fits inside the build volume.
+    #   Note that Support Mesh is not in here because it actually generates
+    #   g-code in the volume of the mesh.
+    _non_printing_mesh_settings = {"anti_overhang_mesh", "infill_mesh", "cutting_mesh"}
+
     def __init__(self):
         super().__init__()
         self._stack = PerObjectContainerStack(stack_id = id(self))
@@ -78,6 +86,8 @@ class SettingOverrideDecorator(SceneNodeDecorator):
             Application.getInstance().getBackend().needsSlicing()
             Application.getInstance().getBackend().tickle()
 
+            self._node._non_printing_mesh = any(self._stack.getProperty(setting, "value") for setting in self._non_printing_mesh_settings)
+
     ##  Makes sure that the stack upon which the container stack is placed is
     #   kept up to date.
     def _updateNextStack(self):