ISO 10303-214:2010(E)

Figure — Arrowleft Figure — Clause 4 Figure — Arrowright

4.2.341 Ngon_profile

A Ngon_profile is a profile that is composed of 3 or more connected straight and co-planar lines. One side of the Ngon_profile is parallel to the x-axis of the inherited Axis_placement of the profile. This side intersects the y-axis at a negative value as shown in Figure 49. The centre of the Ngon_profile coincides with the centre of the circle defining the extent of the ngon outlining the profile.

A Ngon_profile is a type of Closed_profile.

The data associated with a Ngon_profile are the following:

4.2.341.1 circumscribed_or_across_flats

The circumscribed_or_across_flats specifies whether the diameter defining the Ngon_profile is the circumscribing diameter or tangent to the sides.

The following values shall be used:

4.2.341.2 corner_radius

The corner_radius specifies the size of an arc blend between any two sides of the Ngon_profile. The corner_radius shall be smaller than

Figure — Formula04
where r is the circumscribed_radius and n is the number_of_sides.

See ngon_profile to feature_parameter for the application assertion.

The corner_radius need not be specified for a particular Ngon_profile.

4.2.341.3 diameter

The diameter specifies the diameter of the circle used to define the Ngon_profile.

See ngon_profile to feature_parameter for the application assertion.

4.2.341.4 number_of_sides

The number_of_sides specifies how many sides are needed for the Ngon_profile.



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