9
$\begingroup$

Bug introduced in 10.4.0 and fixed in 11.0

This code produces a MeshRegion in versions 10.0 through 10.3.1,

MeshRegion[{{0.68, 0.88}, {0.84, 0.85}, {1.12, 0.89}, {0.33, 
   1.13}, {0.81, 0.33}, {0.43, 0.33}, {0.15, 1.13}, {0.96, 
   0.33}, {1.12, 0.33}, {1.12, 1.13}, {-0.12, 0.33}, {-0.12, 
   1.13}}, {Polygon[{1, 5, 8, 2, 1}], Polygon[{3, 9, 8, 2, 3}], 
  Polygon[{6, 11, 12, 7, 6}], Polygon[{1, 2, 3, 10, 4, 1}], 
  Polygon[{1, 5, 6, 7, 4, 1}]}]

sample mesh region

But in version 10.4, it returns the input unevaluated. Is this a bug? Am I not using the proper syntax?

Improve this question
$\endgroup$
4
  • $\begingroup$ If you remove the dupe points, it works: MeshRegion[{{0.68, 0.88}, {0.84, 0.85}, {1.12, 0.89}, {0.33, 1.13}, {0.81, 0.33}, {0.43, 0.33}, {0.15, 1.13}, {0.96, 0.33}, {1.12, 0.33}, {1.12, 1.13}, {-0.12, 0.33}, {-0.12, 1.13}}, {Polygon[{1, 5, 8, 2}], Polygon[{3, 9, 8, 2}], Polygon[{6, 11, 12, 7}], Polygon[{1, 2, 3, 10, 4}], Polygon[{1, 5, 6, 7, 4}]}] $\endgroup$
    – J. M.'s lack of A.I. ♦
    Apr 8, 2016 at 16:22
  • 3
    $\begingroup$ @J.M. Yes, this is correct, but there should be a message. I have filed a bug report. $\endgroup$
    – ilian
    Apr 8, 2016 at 16:32
  • $\begingroup$ @J.M. I mistakenly thought that Polygon needed a closed loop, but it apparently will close it itself. My mistake, should I delete this? $\endgroup$
    – Jason B.
    Apr 8, 2016 at 17:48
  • $\begingroup$ Had ilian not commented, I would've agreed with removing this. So, no. $\endgroup$
    – J. M.'s lack of A.I. ♦
    Apr 8, 2016 at 20:17

1 Answer 1

Reset to default
3
$\begingroup$

This has been improved as of version 11.0.0. Now the polygons in the input are reprocessed which results in elimination of the repeated vertices.

enter image description here

Improve this answer
$\endgroup$

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge that you have read and understand our privacy policy and code of conduct.

Not the answer you're looking for? Browse other questions tagged or ask your own question.