work around small float inaccuracies for maxz of the bounding box at the...

work around small float inaccuracies for maxz of the bounding box at the height of the model (for DropCutter)


git-svn-id: https://pycam.svn.sourceforge.net/svnroot/pycam/trunk@841 bbaffbd6-741e-11dd-a85d-61de82d9cad9

src/pycam/PathGenerators/__init__.py

@@ -192,7 +192,10 @@ def get_free_paths_ode(physics, p1, p2, depth=8):
     return points
 
 def get_max_height_ode(physics, x, y, minz, maxz):
-    low, high = minz, maxz
+    # Take a small float inaccuracy for the upper limit into account.
+    # Otherwise an upper bound at maxz of the model will not return
+    # a valid surface. That's why we add 'epsilon'.
+    low, high = minz, maxz + epsilon
     trip_start = 20
     safe_z = None
     # check if the full step-down would be ok
@@ -239,7 +242,7 @@ def get_max_height_triangles(model, cutter, x, y, minz, maxz):
     # this avoids zero-cuts for models that exceed the bounding box height
     if (height_max is None) or (height_max < minz + epsilon):
         height_max = minz
-    if height_max > maxz:
+    if height_max > maxz + epsilon:
         return None
     else:
         return Point(x, y, height_max)