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Is a Point Inside or Outside a Regular Polygon?
This Demonstration determines whether a point is inside or outside a polygon by summing the angles between adjacent vertices and the point in question. If the sum is (approximately)
, the point is inside; otherwise, it is outside.
Contributed by:
Jon Perry
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For more information, see the Wikipedia entry for
Point in polygon
.
PERMANENT CITATION
"
Is a Point Inside or Outside a Regular Polygon?
" from
the Wolfram Demonstrations Project
http://demonstrations.wolfram.com/IsAPointInsideOrOutsideARegularPolygon/
Contributed by:
Jon Perry
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