How to generate convex polygon [closed]

It's difficult to tell what is being asked here. Thi开发者_如何学JAVAs question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center. Closed 11 years ago.

I really can't think of any method which would be efficient and faster. Does anyone has any clue?

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make a circle around the centroid and inscribe the n-gon in that circle.