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[Octave-bug-tracker] [bug #48109] Trisurf fails to colour triangles corr
From: |
anonymous |
Subject: |
[Octave-bug-tracker] [bug #48109] Trisurf fails to colour triangles correctly. |
Date: |
Fri, 3 Jun 2016 09:03:05 +0000 (UTC) |
User-agent: |
Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36 |
URL:
<http://savannah.gnu.org/bugs/?48109>
Summary: Trisurf fails to colour triangles correctly.
Project: GNU Octave
Submitted by: None
Submitted on: Fri 03 Jun 2016 09:03:02 AM UTC
Category: Plotting
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: Matlab Compatibility
Status: None
Assigned to: None
Originator Name: Tim D
Originator Email: address@hidden
Open/Closed: Open
Discussion Lock: Any
Release: 4.0.0
Operating System: Microsoft Windows
_______________________________________________________
Details:
Hi all,
I am running the trisurf function.
I am calling it like so:
trisurf(Triangles,Points(:,2),Points(:,3),Points(:,4),SSDisp);
'Triangles' is a 3xn vector of the triangluation
This points to rows in the 'Points' which is a vector where each row defines
the corner points of each triangle.
'SSDisp' is a value at the centre of each triangle I have calculated.
If I try and run this in the current octave version (4.0) this gives an error
'error: trisurf: C must have 'numel (Z)' elements'
This is not in the octave documentation or explicitly in the MATLAB online
docs either but MATLAB actually allows users to colour triangles in trisurf
with a colour matrix that is the size of the number of triangles, This means
the user does not need the colour vector to be the same size as the 'z'
values. Picture attached
Currently the Trisurf code looks like this:
handle = patch ("Faces", tri, "Vertices", [x(:), y(:), z(:)],
"FaceVertexCData", reshape (c, numel (c), 1),
varargin{:});
It will colour the triangles without an error if changed to:
handle = patch ("Faces", tri, "Vertices", [x(:), y(:), z(:)],
"FaceVertexCData", c(:),
varargin{:});
if (nargout > 0)
I.e this is not reshaping c (the colour vector) but just saying its a column
vector.
The function works fine for me if I change this to the code I have added
above. I have attached a picture of this working.
(Ps I am English so spell colour differently to Americans)
Cheers,
Tim
_______________________________________________________
File Attachments:
-------------------------------------------------------
Date: Fri 03 Jun 2016 09:03:02 AM UTC Name: SSDisp.PNG Size: 95kB By: None
Coloured correctly with the new code
<http://savannah.gnu.org/bugs/download.php?file_id=37369>
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<http://savannah.gnu.org/bugs/?48109>
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