ISO 10303-508:2001

Industrial automation systems and integration - Product data representation and exchange - Part 508 : application interpreted construct : non-manifold surface

This part of ISO 10303 specifies the interpretation of the integrated resources to satisfy requirements for

the description of geometric shapes by means of non-manifold surface models.

The following are within the scope of this part of ISO 10303:

— 3D points;

— points defined in the parameter space of curves or surfaces;

— 3D curves;

— curves defined in the parameter space of surfaces;

NOTE - Such curves are also known as pcurves or cons, which are acronyms for parametrised curve

and curve on surface.

— the elementary curve types line, circle, ellipse, parabola, and hyperbola;

— intersection curves;

— polylines that consist of at least three points;

— the elementary surface types plane, cylinder, cone, torus, and sphere;

— swept surfaces created by rotation or linear extrusion of a curve;

— sculptured curves and surfaces;

— trimming of curves and surfaces using topological entities;

— composition of curves and surfaces using topological entities;

— replication of curves, surfaces, and surface models;

— 3D offsets of curves and surfaces;

— non-manifolds.

The following are outside the scope of this part of ISO 10303:

— unbounded geometry;

— self-intersecting geometry;

— geometry in a 2D cartesian coordinate space;

— replication of points;

— topology without an association to a corresponding geometric domain.

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