# HG changeset patch
# User Markus Mützel <markus.muetzel@gmx.de>
# Date 1584901383 -3600
# Node ID 5e49ba5bdcc162f85715daa609865c9315a37b5a
# Parent  d5dfbd5c80d6f9d0ed8a8ca96f7d6f81ddd23ba0
Keep Z-limits around 0 for 2-D graphics (bug #58015).

* graphics.cc (axes::update_axis_limits): Graphics objects without Z
  limits (2-D objects) keep Z-axis limits at 0.

diff -r d5dfbd5c80d6 -r 5e49ba5bdcc1 libinterp/corefcn/graphics.cc
--- a/libinterp/corefcn/graphics.cc	Sun Mar 22 17:58:36 2020 +0100
+++ b/libinterp/corefcn/graphics.cc	Sun Mar 22 19:23:03 2020 +0100
@@ -8732,6 +8732,11 @@
           xproperties.set_has3Dkids ((max_val - min_val) >
                                      std::numeric_limits<double>::epsilon ());
 
+          // FIXME: How to correctly handle (positive or negative) log scale?
+          if ((! octave::math::isfinite (min_val)
+               || ! octave::math::isfinite (max_val))
+              && ! xproperties.zscale_is ("log"))
+            min_val = max_val = 0.;
 
           limits = xproperties.get_axis_limits (min_val, max_val,
                                                 min_pos, max_neg,