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Re: [cgal-discuss] Question about Convex_hull_d


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  • From: "dmyan" <>
  • To: <>
  • Subject: Re: [cgal-discuss] Question about Convex_hull_d
  • Date: Fri, 15 Jun 2007 20:21:44 +0800

Dear Bernd,
Thanks for your answer!
But actually, I need to use the signed volume of each simplex in my application. So the sequence of points are required.
Is there any other way to solve this problem?

Best

dmyan

----- Original Message ----- From: "Bernd Gaertner" <>
To:
<>
Sent: Friday, June 15, 2007 6:31 PM
Subject: Re: [cgal-discuss] Question about Convex_hull_d


dmyan wrote:
I want to calculate the volume of a Convex_hull_d volume. The method is first to find a point which
inside the convex hull, then connect this point with points of each facet to form a set simplices. The volume of each simplex is calculated seperately and added together. Because I want to compute the oriented volume each simplex, the sequence of points of each facet is important.

If the simplices have disjoint interiors (which you achieve by
connecting an interior point to all facets), you can simply add up
the absolute values of the simplex volumes.

My problem is that I find the volume signs of all the simplices are not same.

They seem irrelevant to me in your application. Or am I missing something?

Best,
Bernd.
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