4
$\begingroup$

Save your work before attempting: Could someone confirm what looks like a bug (definitely occurs in v10 and OSX 10.8.5):

In the documentation for Background and under Neat Examples, the following snippet

ContourPlot3D[x^4 + y^4 + z^4 - (x^2 + y^2 + z^2) == -1/2, {x, -1, 1}, {y, -1, 
  1}, {z, -1, 1}, Mesh -> 15, MeshFunctions -> {#1^2 + #2^2 + #3^2 &},
  MeshShading -> {None, Directive[Blue, Specularity[White, 50]], None,
    Directive[Yellow, Specularity[White, 50]]}, PlotPoints -> 35, 
 MeshStyle -> Opacity[.3], Axes -> False, Boxed -> False, 
 Background -> GrayLevel[.1]]

is found. Evaluating it on my system, crashes my Kernel. Is it a bug or..? without any options, it evaluates fine:

ContourPlot3D[x^4 + y^4 + z^4 - (x^2 + y^2 + z^2) == -1/2, {x, -1, 1}, {y, -1, 
      1}, {z, -1, 1}]

and with the option Mesh->15 Mathematica becomes unresponsive and requires a restart:

ContourPlot3D[x^4 + y^4 + z^4 - (x^2 + y^2 + z^2) == -1/2, {x, -1, 1}, {y, -1, 
       1}, {z, -1, 1}, Mesh->15]
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5
  • $\begingroup$ I cannot reproduce this error in v9 on Windows, which is the only version I have access to at the moment. $\endgroup$ Feb 26 '15 at 17:23
  • 1
    $\begingroup$ Confirmed (v10.0.2 & v9, OSX10.9.5). The problem is None value in MeshShading. For example MeshShadind->{Red,Blue,Yellow} works but not MeshShadind->{Red,None,Yellow}. $\endgroup$
    – SquareOne
    Feb 26 '15 at 17:37
  • $\begingroup$ And no problem concerning your last example with Mesh->15 (even Mesh->50 works for me). $\endgroup$
    – SquareOne
    Feb 26 '15 at 17:40
  • $\begingroup$ @SquareOne After evaluating the code once, without any Nones in MeshShading as you suggested, it works with Mesh-> anything. Odd... $\endgroup$
    – gpap
    Feb 26 '15 at 17:43
  • 1
    $\begingroup$ Confirmed for me on OS X 10.10.2 $\endgroup$ Feb 26 '15 at 22:21
3
$\begingroup$

This was not acknowledged (yet) by Wolfram but appears to have been fixed on version 10.2.0.0

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1
  • $\begingroup$ It also does not crash on Win7x64 MMA 10.1 $\endgroup$
    – LLlAMnYP
    Jul 31 '15 at 14:16

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