Definition

Consider a <Polygon> instance P having N ordered <Vertex> components v_i, where i is a member of { 1, 2, ..., N }. For each v_i, let L_i refer to the <Location> instance referenced by v_i as its <Location> instance. The following conditions shall hold.

1. Each L_i shall specify unique spatial coordinates among L_k, where k is a member of { 1, 2, ..., N }.

2. For each pair of line segments L_ij, L_rs, L_ij and L_rs shall not intersect unless i = s or j = r, in which case they shall intersect only at that common <Vertex> instance.

3. The sequence of line segments L_ij shall specify a bounded portion of a plane.

4. The concave flag of the polygon_flags field of P shall be set to SE_TRUE if P forms a concave polygon; otherwise the concave flag shall be set to SE_FALSE.

Rationale

This is the definition of a <Polygon>.

Example

No example supplied.

FAQs

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