ifcopenshell.api.void.add_filling#

Module Contents#

class ifcopenshell.api.void.add_filling.Usecase(file, opening=None, element=None)#

Fill an opening with an element

Physical elements may have openings in them. For example, a wall might have an opening for a door. That opening is then filled by the door. This indicates that when the door moves, the opening will move with it. Or if the door is removed, then the opening may remain and need to be filled.

Parameters
Returns

The new IfcRelFillsElement relationship

Return type

ifcopenshell.entity_instance.entity_instance

Example:

# A bit of preparation, let's create some geometric contexts since
# we want to create some geometry for our wall and opening.
model3d = ifcopenshell.api.run("context.add_context", model, context_type="Model")
body = ifcopenshell.api.run("context.add_context", model,
    context_type="Model", context_identifier="Body", target_view="MODEL_VIEW", parent=model3d)

# Create a wall
wall = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcWall")

# Let's use the "3D Body" representation we created earlier to add a
# new wall-like body geometry, 5 meters long, 3 meters high, and
# 200mm thick
representation = ifcopenshell.api.run("geometry.add_wall_representation", model,
    context=body, length=5, height=3, thickness=0.2)
ifcopenshell.api.run("geometry.assign_representation", model,
    product=wall, representation=representation)

# Place our wall at the origin
ifcopenshell.api.run("geometry.edit_object_placement", model, product=wall)

# Create an opening, such as for a service penetration with fire and
# acoustic requirements.
opening = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcOpeningElement")

# Let's create an opening representation of a 950mm x 2100mm door.
# Notice how the thickness is greater than the wall thickness, this
# helps resolve floating point resolution errors in 3D.
representation = ifcopenshell.api.run("geometry.add_wall_representation", model,
    context=body, length=.95, height=2.1, thickness=0.4)
ifcopenshell.api.run("geometry.assign_representation", model,
    product=opening, representation=representation)

# Let's shift our door 1 meter along the wall and 100mm along the
# wall, to create a nice overlap for the opening boolean.
matrix = np.identity(4)
matrix[:,3] = [1, -.1, 0, 0]
ifcopenshell.api.run("geometry.edit_object_placement", model, product=opening, matrix=matrix)

# The opening will now void the wall.
ifcopenshell.api.run("void.add_opening", model, opening=opening, element=wall)

# Create a door
door = ifcopenshell.api.run("root.create_entity", model, ifc_class="IfcDoor")

# Let's create a door representation of a 950mm x 2100mm door.
representation = ifcopenshell.api.run("geometry.add_wall_representation", model,
    context=body, length=.95, height=2.1, thickness=0.05)
ifcopenshell.api.run("geometry.assign_representation", model,
    product=door, representation=representation)

# Let's shift our door 1 meter along the wall and 100mm along the
# wall, which lines up with our opening.
matrix = np.identity(4)
matrix[:,3] = [1, .05, 0, 0]
ifcopenshell.api.run("geometry.edit_object_placement", model, product=door, matrix=matrix)

# The door will now fill the opening.
ifcopenshell.api.run("void.add_filling", model, opening=opening, element=door)
execute(self)#