68 lines
2.4 KiB
Python
68 lines
2.4 KiB
Python
# IfcOpenShell - IFC toolkit and geometry engine
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# Copyright (C) 2022 Dion Moult <dion@thinkmoult.com>
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#
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# This file is part of IfcOpenShell.
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#
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# IfcOpenShell is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# IfcOpenShell is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with IfcOpenShell. If not, see <http://www.gnu.org/licenses/>.
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import ifcopenshell
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import ifcopenshell.util.element
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def remove_surface_style(file: ifcopenshell.file, style: ifcopenshell.entity_instance) -> None:
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"""Removes a presentation item from a presentation style
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:param style: The IfcPresentationItem to remove.
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:return: None
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Example:
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.. code:: python
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# Create a new surface style
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style = ifcopenshell.api.style.add_style(model)
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# Create a simple shading colour and transparency.
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shading = ifcopenshell.api.style.add_surface_style(model,
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style=style, ifc_class="IfcSurfaceStyleShading", attributes={
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"SurfaceColour": { "Name": None, "Red": 1.0, "Green": 0.8, "Blue": 0.8 },
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"Transparency": 0., # 0 is opaque, 1 is transparent
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})
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# Remove the shading item
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ifcopenshell.api.style.remove_surface_style(model, style=shading)
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"""
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to_delete = set()
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if style.is_a("IfcSurfaceStyleWithTextures"):
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textures = style.Textures
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if file.schema == "IFC2X3":
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to_delete.update(textures)
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else:
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for texture in textures:
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if coords := texture.IsMappedBy:
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for coordinate in coords:
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to_delete.add(coordinate)
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else:
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to_delete.add(texture)
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for attribute in style:
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if isinstance(attribute, ifcopenshell.entity_instance) and attribute.id():
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to_delete.add(attribute)
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file.remove(style)
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for element in to_delete:
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ifcopenshell.util.element.remove_deep2(file, element)
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