Extrude line to make it surface body

[harikrushna171]

There is an option in Discovery to extrude a line to create a surface. (example: If i draw simple line and extrude it, It will become rectangle)

How can I do this using PyGeom? Which command should I use?

`modeler = launch_modeler()
print(modeler)

design_name = "ExtrudeProfile"
design = modeler.create_design(design_name)

web = 50
height = 80
width = 200
length = 1000

plane = Plane(origin=Point3D([0,0,0]), direction_x=Vector3D([0,1,0]), direction_y=Vector3D([0,0,1]))
sketch = Sketch(plane)
(sketch.segment(Point2D([0, 0]), Point2D([web, 0]))
.segment_to_point(Point2D([web, height]))
.segment_to_point(Point2D([width-web, height]))
.segment_to_point(Point2D([width-web, 0]))
.segment_to_point(Point2D([width, 0])))
sketch.plot()
body = GeometryCommands.extrude_edges(sketch, distance=length)
design.plot()`

[RobPasMue]

Hi @harikrushna171 - thanks for opening this discussion!

As of now, it is currently not possible to extrude a "sketched" line and create it a surface body. The extrude_edges command allows you to take an existing body's edge and convert it into a new surface body. See this example:

pyansys-geometry/tests/integration/test_geometry_commands.py

Lines 236 to 283 in b0225b1

	def test_extrude_edges_and_up_to(modeler: Modeler):
	"""Test extrude edges and up to."""
	design = modeler.create_design("extrude_edges")
	upto = design.extrude_sketch("box", Sketch().box(Point2D([0, 0]), 1, 1), 1)
	upto.translate(UnitVector3D([0, 0, 1]), 5)
	assert upto.volume.m == pytest.approx(Quantity(1, UNITS.m**3).m, rel=1e-6, abs=1e-8)
	body = design.extrude_sketch("box2", Sketch().box(Point2D([0, 0]), 1, 1), 1)
	assert body.volume.m == pytest.approx(Quantity(1, UNITS.m**3).m, rel=1e-6, abs=1e-8)
	# extrude edge
	created_bodies = modeler.geometry_commands.extrude_edges(
	body.edges[0], 1, body.edges[0].faces[1]
	)
	assert len(created_bodies) == 1
	assert created_bodies[0].is_surface
	assert created_bodies[0].faces[0].area.m == pytest.approx(
	Quantity(1, UNITS.m**2).m, rel=1e-6, abs=1e-8
	)
	# extrude edge up to face
	created_bodies = modeler.geometry_commands.extrude_edges_up_to(
	body.edges[0], upto.faces[0], Point3D([0, 0, 0]), UnitVector3D([0, 0, 1])
	)
	assert len(created_bodies) == 1
	assert created_bodies[0].is_surface
	assert created_bodies[0].faces[0].area.m == pytest.approx(
	Quantity(4, UNITS.m**2).m, rel=1e-6, abs=1e-8
	)
	# extrude multiple edges up to
	created_bodies = modeler.geometry_commands.extrude_edges_up_to(
	body.edges, upto.faces[1], Point3D([0, 0, 0]), UnitVector3D([0, 0, 1])
	)
	assert created_bodies[0].is_surface
	assert created_bodies[0].faces[0].area.m == pytest.approx(
	Quantity(6, UNITS.m**2).m, rel=1e-6, abs=1e-8
	)
	assert created_bodies[0].faces[1].area.m == pytest.approx(
	Quantity(6, UNITS.m**2).m, rel=1e-6, abs=1e-8
	)
	assert created_bodies[0].faces[2].area.m == pytest.approx(
	Quantity(6, UNITS.m**2).m, rel=1e-6, abs=1e-8
	)
	assert created_bodies[0].faces[3].area.m == pytest.approx(
	Quantity(6, UNITS.m**2).m, rel=1e-6, abs=1e-8
	)

In your cawse, you might be interested in using the create_surface method instead. Although you will have to create the rectangle sketch yourself rather than providing a distance. See

pyansys-geometry/src/ansys/geometry/core/designer/component.py

Lines 915 to 943 in b0225b1

	def create_surface(self, name: str, sketch: Sketch) -> Body:
	"""Create a surface body with a sketch profile.
	The newly created body is placed under this component within the design assembly.
	Parameters
	----------
	name : str
	User-defined label for the new surface body.
	sketch : Sketch
	Two-dimensional sketch source for the surface definition.
	Returns
	-------
	Body
	Body (as a planar surface) from the given sketch.
	"""
	self._grpc_client.log.debug(
	f"Creating planar surface from sketch provided on {self.id}. Creating body..."
	)
	response = self._grpc_client.services.bodies.create_planar_body(
	name=name,
	parent_id=self.id,
	sketch=sketch,
	backend_version=self._grpc_client.backend_version,
	)
	return self.__build_body_from_response(response)

[harikrushna171]

Thank you for your response @RobPasMue. Is it possible for ANSYS to add this functionality in the future, similar to what is available in Discovery?

This feature would be very helpful for creating surfaces.

For example, if I want to create a C channel with a length of 1000mm, I can simply create the C shape and extrude it, which will automatically generate a surface model of the C profile same as discovery.

Kindly please include in enhancement request.

[RobPasMue]

Will do - I will bring it to the internal dev team! Thanks @harikrushna171!

[RobPasMue]

FYI @harikrushna171 - have a look at https://geometry.docs.pyansys.com/version/stable/examples/03_modeling/surface_bodies.html

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