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| − | {{Start coding}}
| + | To import an IFC: |
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| − | ==Run a script in blender from command line==
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| − | Blender can run any Python script headlessly. This allows for a lot of automation, which may run on a scheduled time. On Linux or Mac, you can combine this with cron, or use scheduled tasks on Windows. For example, to run the script <code>script.py</code>, just execute:
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| − | <syntaxhighlight lang="bash">
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| − | blender -b -P script.py
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| − | </syntaxhighlight>
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| | | | |
| − | ==Import an IFC==
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| | <syntaxhighlight lang="python"> | | <syntaxhighlight lang="python"> |
| | bpy.ops.import_ifc.bim(filepath='/path/to/your/file.ifc') | | bpy.ops.import_ifc.bim(filepath='/path/to/your/file.ifc') |
| | </syntaxhighlight> | | </syntaxhighlight> |
| | | | |
| − | ==Export an IFC==
| + | To export an IFC: |
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| | <syntaxhighlight lang="python"> | | <syntaxhighlight lang="python"> |
| | bpy.ops.export_ifc.bim(filepath='/path/to/your/file.ifc') | | bpy.ops.export_ifc.bim(filepath='/path/to/your/file.ifc') |
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| | ifc_exporter.export(bpy.context.selected_objects) | | ifc_exporter.export(bpy.context.selected_objects) |
| | </syntaxhighlight> | | </syntaxhighlight> |
| − |
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| − | =Access IFC objects=
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| − | Access multiple objects of specific criteria.
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| − | ==Access Elements==
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| − | <syntaxhighlight lang="python">
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| − | import bpy
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| − |
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| − | walls = [obj for obj in bpy.context.scene.objects if obj.name.startswith("IfcWall")]
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| − | voids = [obj for obj in bpy.context.scene.objects if obj.name.startswith("IfcBuildingElementProxy/ProvisionForVoid")]
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| − | </syntaxhighlight>
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| − |
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| − | =Read object IFC data=
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| − | Examples affect active object only.
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| − | ==Element IFC Guid / GlobalId==
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| − | <syntaxhighlight lang="python">
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| − | import bpy
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| − | from blenderbim.bim.ifc import IfcStore
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| − | obj = bpy.context.active_object
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| − | IfcStore.get_file().by_id(obj.BIMObjectProperties.ifc_definition_id).GlobalId
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| − | </syntaxhighlight>
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| − |
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| − | ==Element Storey==
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| − | <syntaxhighlight lang="python">
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| − | import bpy
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| − | users_collections = bpy.context.active_object.users_collection
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| − | obj_storey = next(iter([coll for coll in users_collections if "IfcBuildingStorey" in coll.name]))
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| − | </syntaxhighlight>
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| − |
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| − | =Manipulate object IFC data=
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| − | Examples affect active object only.
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| − | ==PropertySet (Pset)==
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| − | <syntaxhighlight lang="python">
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| − | import bpy
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| − | # Adding a Pset
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| − | pset = bpy.context.active_object.BIMObjectProperties.psets.add()
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| − | pset.name = "MyPset"
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| − | # Adding a property of type string_value
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| − | prop = pset.properties.add()
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| − | prop.name = "MyProperty"
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| − | prop.string_value = "Hello World !"
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| − | </syntaxhighlight>
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| − | [https://docs.blender.org/api/blender_python_api_current/bpy.props.html Available value types]
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| − | ==QuantityTakeOff (Qto)==
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| − | <syntaxhighlight lang="python">
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| − | import bpy
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| − | # Adding a Qto
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| − | qto = bpy.context.active_object.BIMObjectProperties.qtos.add()
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| − | qto.name = "MyQto"
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| − | # Adding a property of type string_value
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| − | prop = qto.properties.add()
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| − | prop.name = "MyQuantity"
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| − | prop.string_value = "10"
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| − | </syntaxhighlight>
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| − | =Manipulate material IFC data=
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| − | ==PropertySet (Pset)==
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| − | <syntaxhighlight lang="python">
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| − | import bpy
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| − | # Adding a Pset
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| − | pset = bpy.context.object.active_material.BIMMaterialProperties.psets.add()
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| − | pset.name = "MyPset"
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| − | # Adding a property of type string_value
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| − | prop = pset.properties.add()
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| − | prop.name = "MyProperty"
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| − | prop.string_value = "Hello World !"
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| − | </syntaxhighlight>
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| − |
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| − | =Clash Detection=
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| − | ==Clash Detection on 2 sets of elements==
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| − | Clash Detection on 3 cubes in two sets in this example:
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| − | <syntaxhighlight lang="python">
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| − | import bpy
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| − | import collision
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| − | import numpy as np
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| − | import bmesh
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| − | import ifcclash
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| − |
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| − | def get_collision_results(set_a=None, set_b=None):
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| − | a_cm = collision.CollisionManager()
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| − | b_cm = collision.CollisionManager()
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| − | add_to_cm(a_cm, set_a)
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| − | add_to_cm(b_cm, set_b)
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| − | return a_cm.in_collision_other(b_cm, return_data=True)
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| − |
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| − | def add_to_cm(cm, object_names):
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| − | for object_name in object_names:
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| − | name = object_name.name
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| − | obj = bpy.data.objects[name]
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| − | triangulated_mesh = triangulate_mesh(obj)
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| − | mat = np.array(obj.matrix_world)
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| − | mesh = ifcclash.Mesh()
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| − | mesh.vertices = np.array([tuple(v.co) for v in triangulated_mesh.vertices])
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| − | mesh.faces = np.array([tuple(p.vertices) for p in triangulated_mesh.polygons])
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| − | cm.add_object(name, mesh, mat)
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| − |
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| − |
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| − | def triangulate_mesh(obj):
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| − | mesh = obj.evaluated_get(bpy.context.evaluated_depsgraph_get()).to_mesh()
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| − | bm = bmesh.new()
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| − | bm.from_mesh(mesh)
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| − | bmesh.ops.triangulate(bm, faces=bm.faces)
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| − | bm.to_mesh(mesh)
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| − | bm.free()
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| − | del bm
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| − | return mesh
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| − |
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| − | set_a = [
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| − | bpy.data.scenes['Scene'].objects['Cube'],
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| − | ]
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| − | set_b = [
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| − | bpy.data.scenes['Scene'].objects['Cube.001'],
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| − | bpy.data.scenes['Scene'].objects['Cube.002'],
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| − | ]
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| − |
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| − |
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| − | err, results = get_collision_results(set_a=set_a, set_b=set_b)
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| − |
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| − | seen_pairs = set()
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| − | for result in results:
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| − | result_pair = result.names
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| − | result_names_str = str(result_pair)
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| − | if result_names_str in seen_pairs:
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| − | continue
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| − | seen_pairs.add(str(result_pair))
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| − | print(35 * "-")
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| − | print(result_names_str)
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| − | </syntaxhighlight>
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| − |
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| − |
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| − | [[Category:Blender]] [[Category:BlenderBIM Add-on]]
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