ifcopenshell.api.material.remove_layer

Module Contents

ifcopenshell.api.material.remove_layer.remove_layer(file: ifcopenshell.file, layer: ifcopenshell.entity_instance) → None

Removes a layer from a layer set

Note that it is invalid to have zero items in a set, so you should leave at least one layer to ensure a valid IFC dataset.

Parameters:

layer (ifcopenshell.entity_instance) – The IfcMaterialLayer entity you want to remove

Returns:

None

Return type:

None

Example:

# Create a material set for steel stud partition walls.
material_set = ifcopenshell.api.material.add_material_set(model,
    name="Window", set_type="IfcMaterialConstituentSet")

gypsum = ifcopenshell.api.material.add_material(model, name="PB01", category="gypsum")
steel = ifcopenshell.api.material.add_material(model, name="ST01", category="steel")

# Now let's use those materials as three layers in our set, such
# that the steel studs are sandwiched by the gypsum. Let's imagine
# we're setting the layer thickness in millimeters.
layer1 = ifcopenshell.api.material.add_layer(model, layer_set=material_set, material=gypsum)
ifcopenshell.api.material.edit_layer(model, layer=layer1, attributes={"LayerThickness": 13})
layer2 = ifcopenshell.api.material.add_layer(model, layer_set=material_set, material=steel)
ifcopenshell.api.material.edit_layer(model, layer=layer2, attributes={"LayerThickness": 92})
layer3 = ifcopenshell.api.material.add_layer(model, layer_set=material_set, material=gypsum)
ifcopenshell.api.material.edit_layer(model, layer=layer3, attributes={"LayerThickness": 13})

# Let's remove the last layer, such that the wall might be clad only
# one one side such as to line a services riser.
ifcopenshell.api.material.remove_layer(model, layer=layer3)