[Octave-bug-tracker] [bug #42159] Inconsistent patch vertices/faces should lead to a warning

[Pantxo Diribarne]

URL:
  <http://savannah.gnu.org/bugs/?42159>

                 Summary: Inconsistent patch vertices/faces should lead to a
warning
                 Project: GNU Octave
            Submitted by: pantxo
            Submitted on: lun. 21 avril 2014 18:22:36 GMT
                Category: Plotting
                Severity: 3 - Normal
                Priority: 5 - Normal
              Item Group: Incorrect Result
                  Status: None
             Assigned to: None
         Originator Name: 
        Originator Email: 
             Open/Closed: Open
         Discussion Lock: Any
                 Release: dev
        Operating System: Any

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Details:

In octave :


t1 = (1/16:1/8:1)' * 2*pi;
t2 = ((1/16:1/8:1)' + 1/32) * 2*pi;
x1 = sin (t1) - 0.8;
y1 = cos (t1);
x2 = sin (t2) + 0.8;
y2 = cos (t2);
pa = patch ([x1,x2], [y1,y2], 'r');
set (pa, 'vertices', get (0, 'defaultpatchvertices'))

## error: setdata: A(I): index out of bounds; value 16 out of bound 3
## error: called from:
## error:  
/home/pantxo/media/dev/octavebuild/../octaveclone/scripts/plot/draw/private/__patch__.m
at line 262, column 5
## error: evaluating argument list element number 2
## error:  
/home/pantxo/media/dev/octavebuild/../octaveclone/scripts/plot/draw/private/__patch__.m
at line 362, column 7
## error:  
/home/pantxo/media/dev/octavebuild/../octaveclone/scripts/plot/draw/private/__patch__.m
at line 352, column 3


This is due to inconsistent vertices/faces properties. In Matlab it leads to a
warning "Warning: Values in patch Faces must be in [1 : rows(Vertices)] - not
rendering"

Contrary to all other base graphics objects, patch property updaters are
implemented using listeners. This bug has an easy fix, but it would probably
be more consistent to rewrite (translate) the listeners in the form of c++
updaters.





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