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The SEDRIS Data Representation Model
APPENDIX A - Classes Polygon |
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An instance of this DRM class specifies a bounded portion of a plane, defined by a set of three or more <Vertex> components listed in counterclockwise order. The final segment connecting the last <Vertex> component to the first <Vertex> component is implicit, not explicit. That is, the first <Vertex> component is not duplicated to also appear as the last <Vertex> component of the <Polygon> instance.
A <Polygon> instance represented by multiple subfaces
each of which are other <Polygon> instances
is depicted in
The resulting DRM objects are depicted in
In processing these subfaces, the traversal and drawing order of the DRM objects is depth first.
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| SE_Polygon_Flag | polygon_flags; | (notes) |
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EXAMPLE A <Polygon> instance can be decomposed into multiple <Polygon> instances representing subfaces.
The polygon_flags field specifies the set of SE_Polygon_Flag members applicable to the <Polygon> instance. For a <Polygon> instance with a <Polygon Control Link> component X, the value of the polygon_flags field is obtained from X.
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