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Added ShapeBuilder class and library for non structural assets (
`ShapeBuilder` class is used to programmatically create 2d and 3d ifc shapes and representations. It's inspired by the way OpenSCAD language is designed - the goal was to create a readable and easy way to create new shapes. The class can be imported from `ifcopenshell.util.representation` module. Examples of things created with `ShapeBuilder` can be found in `shape_builder_examples.py` or `generate_furniture_library.py` / `Non_structural_assets_library.ifc`. Also added ifc library of non structual assets (furniture etc) - `Non_structural_assets_library.ifc`. All assets are using most common dimensions for them - it makes it good for prototyping. Related to https://community.osarch.org/discussion/1192
This commit is contained in:
Andrej730
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import ifcopenshell
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from ifcopenshell.util.representation import ShapeBuilder
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from mathutils import Vector
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V = lambda *x: Vector([float(i) for i in x])
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# TODO: move examples to more suitable place
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def simple_uses():
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ifc_file = ifcopenshell.file()
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builder = ShapeBuilder(ifc_file)
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triangle_curve = builder.polyline(( (0., 0.), (1., 2.), (2., 0.) ), closed=True)
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print(triangle_curve)
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rectangle_curve = builder.rectangle()
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print(rectangle_curve)
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circle_curve = builder.circle()
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print(circle_curve)
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translated_rect = builder.translate(rectangle_curve, Vector( (2.5, 2.5) ), create_copy=True)
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print(translated_rect)
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rotated_triangle = builder.rotate(triangle_curve, 90,
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pivot_point=Vector( (1., 1.) ),
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counter_clockwise=True,
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create_copy=True)
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print(rotated_triangle)
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a, b = builder.translate(
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[rectangle_curve, circle_curve],
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Vector( (5., 5.) ), create_copy=True)
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print(f"Multiple translated objects: {a}, {b}")
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c, d = builder.rotate(
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[a, b], 90,
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pivot_point=Vector( (0., 0.) ),
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counter_clockwise=False,
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create_copy=True)
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print(f'Multiple rotated objects: {c}, {d}')
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mirrored_objects = builder.mirror(
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[a, b],
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mirror_axes=[Vector((1.0, 0.0)), Vector((0.0, 1.0)), Vector((1.0, 1.0))],
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mirror_point=Vector((3.0, 3.0)),
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create_copy=True,
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)
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print(f"Multiple mirrored objects: {mirrored_objects}")
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rotated_circle = builder.rotate(
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builder.translate(circle_curve, Vector((5.0, 5.0)), create_copy=True),
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90,
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pivot_point=Vector((0.0, 0.0)),
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counter_clockwise=True,
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create_copy=True,
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)
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print(rotated_circle)
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profile = builder.profile(
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rectangle_curve, "test_profile",
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inner_curves=[builder.circle(center=Vector((0.5, 0.5)), radius=0.2)]
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)
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print(profile)
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extruded_area = builder.extrude(profile, 5.0)
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print(extruded_area)
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ifc_file.write("tmp.ifc")
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def generate_desk_test():
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ifc_file = ifcopenshell.file()
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desks = [
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generate_simple_desk(ifc_file, 1000, 600, 730),
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generate_simple_desk(ifc_file, 1200, 700, 750),
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generate_simple_desk(ifc_file, 1500, 800, 750),
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]
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print(f"desks: {desks}")
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table = generate_table(ifc_file, 1000, 600, 730)
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print(f"table: {table}")
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ifc_file.write("tmp.ifc")
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def mirror_placement_test():
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ifc_file = ifcopenshell.api.run("project.create_file")
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project = ifcopenshell.api.run(
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"root.create_entity", ifc_file, ifc_class="IfcProject", name=f"Non-structural assets library"
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)
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library = ifcopenshell.api.run(
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"root.create_entity", ifc_file, ifc_class="IfcProjectLibrary", name=f"Non-structural assets library"
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)
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ifcopenshell.api.run("project.assign_declaration", ifc_file, definition=library, relating_context=project)
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unit = ifcopenshell.api.run("unit.add_si_unit", ifc_file, unit_type="LENGTHUNIT", name="METRE", prefix="MILLI")
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ifcopenshell.api.run("unit.assign_unit", ifc_file, units=[unit])
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model = ifcopenshell.api.run("context.add_context", ifc_file, context_type="Model")
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plan = ifcopenshell.api.run("context.add_context", ifc_file, context_type="Plan")
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representations = {
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"body": ifcopenshell.api.run(
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"context.add_context",
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ifc_file,
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context_type="Model",
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context_identifier="Body",
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target_view="MODEL_VIEW",
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parent=model,
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),
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"annotation": ifcopenshell.api.run(
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"context.add_context",
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ifc_file,
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context_type="Plan",
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context_identifier="Annotation",
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target_view="PLAN_VIEW",
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parent=plan,
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),
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}
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builder = ShapeBuilder(ifc_file)
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width = 15.0
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height = 5.0
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size = V(width, height)
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offset = 2.5
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second_size = V(offset, offset)
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rect = builder.rectangle(size=size)
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rect_small = builder.rectangle(size=size - second_size, position=second_size / 2)
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rect_profile = builder.profile(rect, inner_curves=rect_small)
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pl = builder.extrude(rect_profile,
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magnitude=7.0,
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position_z_axis=V(0, -1, 0),
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extrusion_vector=V(0, 0, -1),
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position=V(0, 5, 0)
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)
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rect = builder.rectangle(size=size)
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back_wall = builder.extrude(rect,
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magnitude=2.0,
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position_z_axis=V(0, -1, 0),
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extrusion_vector=V(0, 0, -1),
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position=V(0, 1, 0)
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)
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items_3d = [pl, back_wall]
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builder.mirror(items_3d, mirror_axes=V(0, 1))
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representation_3d = builder.get_representation(context=representations["body"], items=items_3d)
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element = ifcopenshell.api.run("root.create_entity", ifc_file, ifc_class="IfcFurnitureType", name="test")
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ifcopenshell.api.run("geometry.assign_representation", ifc_file, product=element, representation=representation_3d)
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ifcopenshell.api.run("project.assign_declaration", ifc_file, definition=element, relating_context=library)
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ifc_file.write("tmp.ifc")
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def curve_between_two_points_test():
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ifc_file = ifcopenshell.api.run("project.create_file")
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project = ifcopenshell.api.run(
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"root.create_entity", ifc_file, ifc_class="IfcProject", name=f"Non-structural assets library"
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)
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library = ifcopenshell.api.run(
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"root.create_entity", ifc_file, ifc_class="IfcProjectLibrary", name=f"Non-structural assets library"
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)
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ifcopenshell.api.run("project.assign_declaration", ifc_file, definition=library, relating_context=project)
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unit = ifcopenshell.api.run("unit.add_si_unit", ifc_file, unit_type="LENGTHUNIT", name="METRE", prefix="MILLI")
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ifcopenshell.api.run("unit.assign_unit", ifc_file, units=[unit])
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model = ifcopenshell.api.run("context.add_context", ifc_file, context_type="Model")
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plan = ifcopenshell.api.run("context.add_context", ifc_file, context_type="Plan")
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representations = {
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"body": ifcopenshell.api.run(
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"context.add_context",
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ifc_file,
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context_type="Model",
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context_identifier="Body",
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target_view="MODEL_VIEW",
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parent=model,
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),
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"annotation": ifcopenshell.api.run(
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"context.add_context",
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ifc_file,
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context_type="Plan",
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context_identifier="Annotation",
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target_view="PLAN_VIEW",
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parent=plan,
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),
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}
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builder = ShapeBuilder(ifc_file)
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width, depth = (200.0, 200.0)
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curve_coords = (
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(V(0, depth), V(-width, 0)), # ccw
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(V(0, depth), V(width, 0)), # cw
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(V(0, -depth), V(width, 0)), # ccw
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(V(0, -depth), V(-width, 0)), # cw
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(V(+width/2, 0), V(0, depth)), # ccw
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(V(-width/2, 0), V(0, depth)), # cw
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(V(-width/2, 0), V(0, -depth)), # ccw
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(V(+width/2, 0), V(0, -depth)), # cw
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(V(0, depth/2), V(+width, 0)), # cw
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(V(0, depth/2), V(-width, 0)), # ccw
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(V(0, -depth/2), V(+width, 0)), # ccw
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(V(0, -depth/2), V(-width, 0)), # cw
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)
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items_2d = [builder.curve_between_two_points(c) for c in curve_coords]
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representation_2d = builder.get_representation(context=representations["annotation"], items=items_2d)
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print(representation_2d)
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element = ifcopenshell.api.run("root.create_entity", ifc_file, ifc_class="IfcFurnitureType", name="test")
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ifcopenshell.api.run("geometry.assign_representation", ifc_file, product=element, representation=representation_2d)
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ifcopenshell.api.run("project.assign_declaration", ifc_file, definition=element, relating_context=library)
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ifc_file.write("tmp.ifc")
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def generate_simple_desk(ifc_file, width, depth, height):
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# > width, depth, height in mm
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width, depth, height = [i / 1000 for i in (width, depth, height)]
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builder = ShapeBuilder(ifc_file)
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rectangle_curve = builder.rectangle(size=Vector((width, depth)))
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profile = builder.profile(rectangle_curve, "simple_desk")
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extruded_area = builder.extrude(profile, height)
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return extruded_area
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def generate_table(ifc_file, width, depth, height, countertop_thickness=20, leg_size=40, leg_offset=50):
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# > width, depth, height in mm
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width, depth, height, countertop_thickness, leg_size, leg_offset = [
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i / 1000 for i in (width, depth, height, countertop_thickness, leg_size, leg_offset)
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]
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builder = ShapeBuilder(ifc_file)
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countertop_curve = builder.rectangle(size=Vector((width, depth)))
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countertop_profile = builder.profile(countertop_curve, "table_countertop")
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countertop = builder.extrude(
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countertop_profile, countertop_thickness, position=V(0, 0, height - countertop_thickness)
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)
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leg_curve = builder.rectangle(size=V(leg_size, leg_size))
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builder.translate(leg_curve, Vector((leg_offset, leg_offset)))
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legs_curves = [leg_curve] + builder.mirror(
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leg_curve, mirror_axes=[V(1, 0), V(0, 1), V(1, 1)], mirror_point=V(width / 2, depth / 2), create_copy=True
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)
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legs_profiles = [builder.profile(leg, "table_leg") for leg in legs_curves]
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legs = [builder.extrude(leg, height - countertop_thickness) for leg in legs_profiles]
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return (countertop, legs)
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if __name__ == "__main__":
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simple_uses()
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# main()
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# placement_mirror_test()
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# mirror_placement_test()
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