[Octave-bug-tracker] [bug #53435] tests: camorbit.m, camroll.m: two failing tests on i686

[Markus Mützel]

Follow-up Comment #8, bug #53435 (project octave):

The attached patch updates the references to the highest possible precision as
seen in Matlab R2016a.

Most changes only add a few more decimals. But the test in camroll.m gives
very different results from the previous ones (R2014a):

## test rolling, then rolling back
%!test
%! hf = figure ("visible", "off");
%! unwind_protect
%!   peaks ();
%!   p = camup ();
%!   assert (p, [0 0 1], eps);
%!   camroll (30);
%!   p = camup ();
%!   ## from Matlab R2014a
%!   q = [0.826398839602911  0.255644120004753  0.50170812412194];
%!   ## from Matlab R2016a
%!   q = [0.33969638129660373 0.02014238382998192 0.94031944194919104];
%!   assert (p, q, 10*eps);
%!   camroll (-30);
%!   ## note it does not go back to [0 0 1]: instead orthog to camera view:
%!   p = camup ();
%!   ## The following assert doesn't seem to have any validation in Matlab
R2016a
%!   assert (dot (p, camtarget () - campos ()), 0, 32*eps);  # FIXME: looser
tolerance needed on i386
%!   ## from Matlab R2014a
%!   q = [0.496200420425837  0.646660977913424  0.57932264103285];
%!   ## from Matlab R2016a
%!   q = [0.14033891839365262 0.18289323924769943 0.97306477226420207];
%!   assert (p, q, 10*eps);
%! unwind_protect_cleanup
%!   close (hf);
%! end_unwind_protect


The on-screen results in R2016a seem to be reasonable. Maybe someone with a
newer Matlab version might be able to check whether this is only an error in
Matlab R2016a on Windows 10 64bit.

Code to execute:

hf = figure;
peaks ();
p = camup ();
fprintf ('%.17f\n', p);
camroll (30);
p = camup ();
fprintf ('%.17f\n', p);
camroll (-30);
p = camup ();
fprintf ('%.17f\n', p);



(file #43783)
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Additional Item Attachment:

File name: bug53435_cam_reference.patch   Size:6 KB


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