#16767: plot3d transformation crashes on functions defined using variable 't'
-------------------------+-------------------------------------------------
Reporter: tcoffee | Owner:
Type: defect | Status: new
Priority: minor | Milestone: sage-6.3
Component: graphics | Keywords: plot3d transformation
Merged in: | function variable
Reviewers: | Authors:
Work issues: | Report Upstream: N/A
Commit: | Branch:
Stopgaps: | Dependencies:
-------------------------+-------------------------------------------------
The only difference between these functions is that one is defined using
the variable {{{t}}}:
{{{
sage: def f(a, b): return 1
sage: def g(a, t): return 1
}}}
Regular {{{plot3d}}} works fine for both:
{{{
sage: plot3d(f, (0, 1), (0, 1))
sage: plot3d(g, (0, 1), (0, 1))
}}}
But applying a cylindrical transformation causes the second one to crash:
{{{
sage: S = Cylindrical('radius', ['azimuth', 'height'])
sage: plot3d(f, (0, 2*pi), (0, 1), transformation = S)
sage: plot3d(g, (0, 2*pi), (0, 1), transformation = S)
---------------------------------------------------------------------------
AttributeError Traceback (most recent call
last)
<ipython-input-7-919ae3065fc0> in <module>()
----> 1 plot3d(g, (Integer(0), Integer(2)*pi), (Integer(0), Integer(1)),
transformation = S)
/usr/lib/sagemath/local/lib/python2.7/site-
packages/IPython/core/displayhook.pyc in __call__(self, result)
236 self.start_displayhook()
237 self.write_output_prompt()
--> 238 format_dict = self.compute_format_data(result)
239 self.write_format_data(format_dict)
240 self.update_user_ns(result)
/usr/lib/sagemath/local/lib/python2.7/site-
packages/IPython/core/displayhook.pyc in compute_format_data(self, result)
148 MIME type representation of the object.
149 """
--> 150 return self.shell.display_formatter.format(result)
151
152 def write_format_data(self, format_dict):
/usr/lib/sagemath/local/lib/python2.7/site-
packages/IPython/core/formatters.pyc in format(self, obj, include,
exclude)
124 continue
125 try:
--> 126 data = formatter(obj)
127 except:
128 # FIXME: log the exception
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/misc/displayhook.pyc in __call__(self, obj)
504 sage: fmt.set_display('simple')
505 """
--> 506 if self.try_format_graphics(obj):
507 return ''
508 s = self.try_format_obj(obj)
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/misc/displayhook.pyc in try_format_graphics(self, obj)
400 from sage.structure.sage_object import SageObject
401 if isinstance(obj, SageObject) and hasattr(obj,
'_graphics_'):
--> 402 return obj._graphics_()
403 return False
404
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/plot/plot3d/base.so in
sage.plot.plot3d.base.Graphics3d._graphics_
(sage/plot/plot3d/base.c:3177)()
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/plot/plot3d/base.so in sage.plot.plot3d.base.Graphics3d.show
(sage/plot/plot3d/base.c:12047)()
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/plot/plot3d/base.so in
sage.plot.plot3d.base.Graphics3d._prepare_for_jmol
(sage/plot/plot3d/base.c:8008)()
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/plot/plot3d/base.so in
sage.plot.plot3d.base.Graphics3d._box_for_aspect_ratio
(sage/plot/plot3d/base.c:8623)()
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/plot/plot3d/base.so in
sage.plot.plot3d.base.Graphics3d._safe_bounding_box
(sage/plot/plot3d/base.c:4219)()
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/plot/plot3d/parametric_surface.so in
sage.plot.plot3d.parametric_surface.ParametricSurface.bounding_box
(sage/plot/plot3d/parametric_surface.c:3529)()
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/plot/plot3d/parametric_surface.so in
sage.plot.plot3d.parametric_surface.ParametricSurface.triangulate
(sage/plot/plot3d/parametric_surface.c:4132)()
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/plot/plot3d/parametric_surface.so in
sage.plot.plot3d.parametric_surface.ParametricSurface.triangulate
(sage/plot/plot3d/parametric_surface.c:4061)()
/usr/lib/sagemath/local/lib/python2.7/site-
packages/sage/plot/plot3d/parametric_surface.so in
sage.plot.plot3d.parametric_surface.ParametricSurface.eval_grid
(sage/plot/plot3d/parametric_surface.c:5786)()
<string> in <lambda>(a, t)
AttributeError: 'float' object has no attribute 'subs'
}}}
I have not verified that this happens for other transformations, but among
single-letter variable names, it only happens for the variable {{{t}}}.
(Likewise for {{{cylindrical_plot3d}}}.)
--
Ticket URL: <http://trac.sagemath.org/ticket/16767>
Sage <http://www.sagemath.org>
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