def subtract(self,obj):
"""subtract( obj ).
Function to take the difference between the
present object and the object obj.
The present object is updated in-place.
"""
try:
if type(obj.obj) == type(self.obj):
other_obj = obj
except:
raise TypeError("Type mismatch for object difference")
self.obj = ocaml.body_difference(self.obj,[other_obj.obj])
def __sub__(self, other):
""" (-).
Function to take the difference between two objects
"""
new_obj = mesh.mesh_obj() # create new object
for sub_obj in other.obj:
for obj in self.obj:
new_obj.obj.append( ocaml.body_difference(obj,[sub_obj]))
for i in range(len(self.bbox[0])): # update bounding box
new_obj.bbox[0].append(self.bbox[0][i])
new_obj.bbox[1].append(self.bbox[1][i])
return new_obj