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https://issues.apache.org/jira/browse/MATH-780?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13258584#comment-13258584
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Andrew Willis edited comment on MATH-780 at 4/20/12 9:01 PM:
-------------------------------------------------------------
New version. Hopefully no missing references. I have removed references to the
PolygonOfPoints class and fixed the constructor error. I have created a class
specifically for the bug report and apologies for not making it cleaner/more
clear.
I'm working on an exact arithmetic version of BSPTrees for CSG operations. I
hope to contribute the code if it's of value to the project. Initially i'll use
Java's BigDecimal classes for arbitrary arithmetic but I plan on performance
enhancements per JR Shewchuk's work (orient3d() etc.,
http://www.cs.cmu.edu/~quake/robust.html).
hope this code (latest version of BSPMesh2.java) helps.
was (Author: arwillis):
New version. Hopefully no missing references.
> BSPTree class and recovery of a Euclidean 3D BRep
> -------------------------------------------------
>
> Key: MATH-780
> URL: https://issues.apache.org/jira/browse/MATH-780
> Project: Commons Math
> Issue Type: Bug
> Affects Versions: 3.0
> Environment: Linux
> Reporter: Andrew Willis
> Labels: BSPTree, euclidean.threed
> Attachments: BSPMesh2.java, BSPMesh2.java, BSPMesh2.java
>
>
> New to the work here. Thanks for your efforts on this code.
> I create a BSPTree from a BoundaryRep (Brep) my test Brep is a cube as
> represented by a float array containing 8 3D points in(x,y,z) order and an
> array of indices (12 triplets for the 12 faces of the cube). I construct a
> BSPMesh() as shown in the code below. I can construct the PolyhedronsSet()
> but have problems extracting the faces from the BSPTree to reconstruct the
> BRep. The attached code (BSPMesh2.java) shows that a small change to 1 of the
> vertex positions causes/corrects the problem.
> Any ideas?
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