#9482: implicit_plot3d gives "Out of memory allocating triangulation" when
plotting an empty surface
------------------------+---------------------------------------------------
Reporter: cwitty | Owner: cwitty
Type: defect | Status: new
Priority: major | Milestone: sage-4.5
Component: graphics | Keywords:
Author: | Upstream: N/A
Reviewer: | Merged:
Work_issues: |
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When you construct an implicit_plot3d that doesn't actually contain any
surface, you get a {{{MemoryError}}} (because it tries to allocate 0
memory to hold the vertices and faces, gets a NULL pointer, and decides
that's an out-of-memory condition).
Here's one example:
{{{
sage: implicit_plot3d(x*x + y*y + z*z - 5000, (x, -5, 5), (y, -5, 5), (z,
-5, 5))
}}}
... long traceback, ending:
{{{
/home/cwitty/sage/local/lib/python2.6/site-
packages/sage/plot/plot3d/implicit_surface.so in
sage.plot.plot3d.implicit_surface.ImplicitSurface.jmol_repr
(sage/plot/plot3d/implicit_surface.c:10893)()
/home/cwitty/sage/local/lib/python2.6/site-
packages/sage/plot/plot3d/implicit_surface.so in
sage.plot.plot3d.implicit_surface.ImplicitSurface.triangulate
(sage/plot/plot3d/implicit_surface.c:11290)()
/home/cwitty/sage/local/lib/python2.6/site-
packages/sage/plot/plot3d/index_face_set.so in
sage.plot.plot3d.index_face_set.IndexFaceSet.realloc
(sage/plot/plot3d/index_face_set.c:3662)()
MemoryError: Out of memory allocating triangulation for <type
'sage.plot.plot3d.implicit_surface.ImplicitSurface'>
}}}
--
Ticket URL: <http://trac.sagemath.org/sage_trac/ticket/9482>
Sage <http://www.sagemath.org>
Sage: Creating a Viable Open Source Alternative to Magma, Maple, Mathematica,
and MATLAB
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