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[Octave-bug-tracker] [bug #55493] Orientation of automatically calculate
From: |
Markus Mützel |
Subject: |
[Octave-bug-tracker] [bug #55493] Orientation of automatically calculated normals differ from Matlab |
Date: |
Wed, 16 Jan 2019 14:40:06 -0500 (EST) |
User-agent: |
Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:65.0) Gecko/20100101 Firefox/65.0 |
URL:
<https://savannah.gnu.org/bugs/?55493>
Summary: Orientation of automatically calculated normals
differ from Matlab
Project: GNU Octave
Submitted by: mmuetzel
Submitted on: Wed 16 Jan 2019 07:40:04 PM UTC
Category: Plotting
Severity: 3 - Normal
Priority: 5 - Normal
Item Group: None
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:
Running "demo isonormal 1" in Octave and in Matlab (see bug #55481), the
direction of the automatically calculated normals is different in Matlab and
in Octave.
While in Matlab all normals seem to point towards the center (the origin or
the barycenter of the patch?), they point in different directions in Octave
(determined by the order of the vertices in each face).
This is not a bug in isonormal but in the algorithm that is used to
automatically calculate the normals.
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