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The term complex polygon can mean two different things: *In computer graphics, a polygon which is neither convex nor concave. *In geometry, a polygon in the unitary plane, which has two complex dimensions. ==Computer graphics== In the world of computer graphics, a complex polygon is a polygon which is neither convex nor concave. This includes any polygon which: *intersects itself. These include star polygons such as the pentagram: *has a boundary comprising discrete circuits, such as a polygon with a hole in it. Therefore, unlike simple polygons, a complex polygon may not always be interpreted as a simple polygonal region. Vertices are only counted at the ends of edges, not where edges intersect in space. A formula relating an integral over a bounded region to a closed line integral may still apply when the "inside-out" parts of the region are counted negatively. Moving around the polygon, the total amount one "turns" at the vertices can be any integer times 360°, e.g. 720° for a pentagram and 0° for an angular "eight". See also: orbit (dynamics), Winding number. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Complex polygon」の詳細全文を読む スポンサード リンク
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