About Geometry - General Information

Exact geometry is exported as follows.

• 3D geometry is exported. 3D geometry can be created with apps such as Mechanical Systems, Fluidic Systems, Electrical & Electronic Systems.
• However, spot fasteners and bead fasteners (Fastening app) are not supported by STEP and cannot be exported.

Tessellated geometry is exported as follows.

• Solid geometry is exported to a STEP file as TESSELLATED_SOLID, and TESSELLATED_EDGE for the edges.
• Surfacic geometry is exported as TESSELLATED_SHELL, and TESSELLATED_EDGE for the edges.
• Wireframe geometry is exported as TESSELLATED_WIRE or TESSELLATED_VERTEX.
• Structured tessellations are supported. For example, a structured cgr representing a keyboard is exported to a STEP file as a structured STEP tessellation (the geometry of all the keys of a given type is represented as a single solid).

Axis systems are imported and exported as follows.

At import:

• The axis systems are imported as standard axis systems with coordinates as parameters.
• The STEP name of the axis system is used for defining the name of the axis system in the tree.
• The visibility of the axis system is taken into account like for the other geometrical elements (according to the Show option).

At export:

• The name of the axis system in the tree is exported as the name of the axis system in STEP (i.e. AXIS2_PLACEMENT_3D.NAME).
• The visibility of the axis system is taken into account like for the other geometrical elements (according to the Show option).

Infinite planes are processed as follows.

• The STEP name of the plane is used for defining the name of the plane in the tree.
• The visibility of the plane is taken into account like for the other geometrical elements (according to the Show option).

STEP entities are imported as follows.

Legend

• I=Implemented
• NI=Not yet implemented
• N/A=Not applicable according to the standard

3D Shape Representation		geometrically bounded wireframe	geometrically bounded surface	edge-based wireframe	shell-based wireframe	manifold surface	faceted brep	advanced brep
High Level Entities		geometric_curve_set	geometric_set	edge_based_ wireframe_model	shell_based_ wireframe_model	shell_based_ surface_model	faceted_brep brep_with_voids	manifold_solid_brep brep_with_voids
Point	cartesian_point	I	I	I	I	I	I	I
	point_on_curve	NI	NI	N/A	N/A	NI	N/A	N/A
	point_on_surface	N/A	N/A	N/A	N/A	NI	N/A	NI
	point_replica	NI	NI	NI	NI	N/A	N/A	NI
	degenerate_pcurve	N/A	N/A	N/A	N/A	NI	N/A	NI
Curve	line	I	I	I	I	I	N/A	I
	circle	I	I	I	I	I	N/A	I
	ellipse	I	I	I	I	I	N/A	I
	hyperbola	I	I	I	I	I	N/A	I
	parabola	I	I	I	I	I	N/A	I
	polyline	I	I	I	I	I	N/A	I
	b_spline_curve (+rational) b_spline_curve_with_knots	I	I	I	I	I	N/A	I
	uniform curve (+rational)	NI	NI	NI	NI	NI	N/A	NI
	quasi_uniform_curve (+rational)	I	I	I	I	I	N/A	I
	bezier curve	I	I	I	I	I	N/A	I
	trimmed_curve	I	I	N/A	N/A	N/A	N/A	N/A
	composite_curve	I	I	N/A	N/A	N/A	N/A	N/A
	composite_curve_on_surface	N/A	NI	N/A	N/A	N/A	N/A	N/A
	boundary_curve outer_boundary_curve	N/A	NI	N/A	N/A	N/A	N/A	N/A
	pcurve	NI	N/A	N/A	N/A	NI	N/A	NI
	surface_curve	I	N/A	N/A	N/A		N/A
	offset_curve_3D	NI	N/A	NI	NI	NI	N/A	NI
	curve_replica	NI	N/A	NI	NI	NI	N/A	NI
Surface	plane	N/A	I	N/A	N/A	I	I	I
	cylindrical_surface	N/A	I	N/A	N/A	I	N/A	I
	conical_surface	N/A	I	N/A	N/A	I	N/A	I
	spherical_surface	N/A	I	N/A	N/A	I	N/A	I
	toroidal_surface	N/A	I	N/A	N/A	I	N/A	I
	degenerate_toroidal_surface	N/A	I	N/A	N/A	I	N/A	I
	surface_of_linear_extrusion	N/A	I	N/A	N/A	I	N/A	I
	surface_of_revolution	N/A	I	N/A	N/A	I	N/A	I
	b_spline_surface b_spline_surface_with_knots	N/A	I	N/A	N/A	I	N/A	I
	uniform_surface	N/A	NI	N/A	N/A	NI	N/A	NI
	quasi_uniform_surface	N/A	I	N/A	N/A	I	N/A	I
	bezier_surface	N/A	I	N/A	N/A	I	N/A	I
	rectangular_trimmed_surface	N/A	I	N/A	N/A	N/A	N/A	N/A
	curve_bounded_surface	N/A	I	N/A	N/A	N/A	N/A	N/A
	rectangular_composite_surface	N/A	NI	N/A	N/A	N/A	N/A	N/A
	offset_surface	N/A	I	N/A	N/A	I	N/A	N/A
	surface_replica	N/A	NI	N/A	N/A	NI	N/A	N/A
Topology	vertex_point	N/A	N/A	I	I	I	N/A	I
	edge_curve	N/A	N/A	I	I	I	N/A	I
	oriented_curve	N/A	N/A	N/A	I	I	N/A	I
	vertex_loop	N/A	N/A	N/A	NI	NI	N/A	NI
	poly_loop	N/A	N/A	N/A	NI	N/A	I	N/A
	edge_loop	N/A	N/A	N/A	I	I	N/A	I
	face_bound face_outer_bound	N/A	N/A	N/A	N/A	I	I	I
	face_surface	N/A	N/A	N/A	N/A	I	I	N/A
	advanced_face	N/A	N/A	N/A	N/A	I	I	I
	oriented_face	N/A	N/A	N/A	N/A	NI	N/A	N/A
	vertex_shell	N/A	N/A	N/A	NI	N/A	N/A	N/A
	wire_shell	N/A	N/A	N/A	NI	N/A	N/A	N/A
	connected_edge_set	N/A	N/A	I	N/A	N/A	N/A	N/A
	open_shell	N/A	N/A	N/A	N/A	I	N/A	N/A
	oriented_open_shell	N/A	N/A	N/A	N/A	N/A	N/A	N/A
	closed_shell	N/A	N/A	N/A	N/A	I	I	I
	oriented_closed_shell	N/A	N/A	N/A	N/A	N/A	I	I
	manifold_solid_brep	N/A	N/A	N/A	N/A	N/A	N/A	I
	brep_with_voids	N/A	N/A	N/A	N/A	N/A	N/A	I
	faceted_brep	N/A	N/A	N/A	N/A	N/A	I	N/A

STEP entities are exported as follows.

The geometry is exported:

• Bodies (volumes, shells and faces) of 3D Shape Representations are exported to in AP203/AP214/AP242 ed1 files in compliance with Part 42.
• The export of Shells occurs with no limitation and all the structure information can be recovered.
• A point belonging to a sketch is exported only if the sketch contains only points.
• If a feature contains several wires (result of a section), the wires will be exported as Composite Curves and will all have the same name (that of the feature).
• Thicknesses are supported.
• Other entities are exported as follows.

• I=Implemented
• NI=Not yet implemented
• N/G=Not generated by 3DEXPERIENCE
• N/A=Not applicable according to the standard

		Wire (GSM, Free Style)		Not generated by Dassault Systèmes		OpenShell (GSM, Shape Design, Free Style)	Not generated by Dassault Systèmes	Geometrical Set
3D Shape Representation		geometrically bounded wireframe	geometrically bounded surface	edge-based wireframe	shell-based wireframe	manifold surface	faceted brep	advanced brep
High Level Entities		geometric_curve_set	geometric_set	edge_based_ wireframe_model	shell_based_ wireframe_model	shell_based_ surface_model	faceted_brep brep_with_voids	manifold_solid_brep brep_with_voids
Point	cartesian_point	N/G	I	N/G	N/G	I	N/G	I
	point_on_curve	N/G	N/G	N/G	N/A	N/G	N/A	N/A
	point_on_surface	N/A	N/G	N/A	N/A	N/G	N/A	N/A
	point_replica	N/G	N/G	N/G	N/A	N/A	N/A	N/A
	degenerate_pcurve	N/A	N/G	N/A	N/A	N/G	N/A	N/A
Curve	line	N/G	I	N/G	thru edge_curve	I	N/A	I
	circle	N/G	I	N/G	thru edge_curve	I	N/A	I
	ellipse	N/G	I	N/G	thru edge_curve	I	N/A	I
	hyperbola	N/G	N/G	N/G	thru edge_curve	I	N/A	N/G
	parabola	N/G	N/G	N/G	thru edge_curve	I	N/A	N/G
	polyline	N/G	N/G	N/G	N/G	N/G	N/A	N/G
	b_spline_curve (+rational) b_spline_curve_with_knots	N/G	I	N/G	thru edge_curve	I	N/A	I
	uniform curve (+rational)	N/G	N/G	N/G	N/G	N/G	N/A	N/G
	quasi_uniform_curve (+rational)	N/G	N/G	N/G	N/G	N/G	N/A	N/G
	bezier curve	N/G	N/G	N/G	N/G	N/G	N/A	N/G
	trimmed_curve	N/G	I	N/A	N/A	N/A	N/A	N/A
	composite_curve	N/G	I	N/A	N/A	N/A	N/A	N/A
	composite_curve_on_surface	N/G	N/G	N/A	N/A	N/A	N/A	N/A
	boundary_curve outer_boundary_curve	N/G	N/G	N/A	N/A	N/A	N/A	N/A
	pcurve	N/G	N/G	N/A	N/A	NI	N/A	NI
	surface_curve	N/G	N/G	N/A	N/A	NI	N/A	N/A
	offset_curve_3D	N/G	N/G	N/G	N/G	N/G	N/A	N/A
	curve_replica	N/G	N/G	N/G	N/G	N/G	N/A	N/A
Surface	plane	N/A	N/G	N/A	N/A	I	N/G	I
	cylindrical_surface	N/A	N/G	N/A	N/A	I	N/G	I
	conical_surface	N/A	N/G	N/A	N/A	I	N/A	I
	spherical_surface	N/A	N/G	N/A	N/A	I	N/A	I
	toroidal_surface	N/A	N/G	N/A	N/A	I	N/A	I
	degenerate_toroidal_surface	N/A	N/G	N/A	N/A	N/G	N/A	N/G
	surface_of_linear_extrusion	N/A	N/G	N/A	N/A	I	N/A	I
	surface_of_revolution	N/A	N/G	N/A	N/A	I	N/A	I
	b_spline_surface b_spline_surface_with_knots	N/A	N/G	N/A	N/A	I	N/A	I
	uniform_surface	N/A	N/G	N/A	N/A	N/G	N/A	N/G
	quasi_uniform_surface	N/A	N/G	N/A	N/A	N/G	N/A	N/G
	bezier_surface	N/A	N/G	N/A	N/A	N/G	N/A	N/G
	rectangular_trimmed_surface	N/A	N/G	N/A	N/A	N/A	N/A	N/A
	curve_bounded_surface	N/A	N/G	N/A	N/A	N/A	N/A	N/A
	rectangular_composite_surface	N/A	N/G	N/A	N/A	N/A	N/A	N/A
	offset_surface	N/A	N/G	N/A	N/A	I	N/A	N/A
	surface_replica	N/A	N/G	N/A	N/A	N/G	N/A	N/A
Topology	vertex_point	N/A	N/A	N/G	thru edge_curve	I	N/A	I
	edge_curve	N/A	N/A	N/G	thru oriented_edge	I	N/A	I
	oriented_curve	N/A	N/A	N/A	thru edge_loop	I	N/A	I
	vertex_loop	N/A	N/A	N/A	N/G	N/G	N/A	N/G
	poly_loop	N/A	N/A	N/A	N/G	N/A	N/G	N/A
	edge_loop	N/A	N/A	N/A	thru wire_shell	I	N/A	I
	face_bound face_outer_bound	N/A	N/A	N/A	N/A	I	N/G	I
	face_surface	N/A	N/A	N/A	N/A	N/G	N/G	N/A
	advanced_face	N/A	N/A	N/A	N/A	I	N/G	I
	oriented_face	N/A	N/A	N/A	N/A	N/G	N/A	N/A
	vertex_shell	N/A	N/A	N/A	N/G	N/A	N/A	N/A
	wire_shell	N/A	N/A	N/A	N/G	N/A	N/A	N/A
	connected_edge_set	N/A	N/A	N/G	N/A	N/A	N/A	N/A
	open_shell	N/A	N/A	N/A	N/A	I	N/A	N/A
	oriented_open_shell	N/A	N/A	N/A	N/A	N/A	N/A	N/A
	closed_shell	N/A	N/A	N/A	N/A	I	N/G	I
	oriented_closed_shell	N/A	N/A	N/A	N/A	N/A	N/G	I

The import and export of geometry also depend on some options.

For more information, see:

• About Tessellated and Exact Geometry
• About Geometry Quality Enhancement
• About Units