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Industrial automation systems and integration — Product data representation and exchange — Part 508: Application interpreted construct: Non manifold surface
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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