About

Glnemo2 is an interactive 3D visualization program which displays particles positions of the different components (gas, stars, disk, dark mater halo, bulge) of an N-body snapshot. It's a very useful tool for everybody running N-body simulations from isolated galaxies to cosmological simulations. It can show quickly a lot of information about data by revealing shapes, dense areas, formation of structures such as spirals arms, bars, peanuts or clumps of galaxies. Glnemo2 has been designed to meet the requirements of the user, with simplicity in mind, easy to install, easy to use with an interactive and responsive graphical user interface (based on Digia QT 4.X/5.X API) , powerful with a fast 3D engine (OPenGL and GLSL), and generic with the possibility to load different kinds of input files.

Features:

You can zoom in/out, rotate, scale, translate, select different particles and plot them in different blending colors, color particles according to their density, play with the density threshold, trace orbits, play different time steps, take automatic screenshots to make movies, select particles using the mouse, fly over your simulation using camera path. All this features are accessible from a very intuitive graphic user interface.

Supported input files format:

Glnemo2 uses a plugin mechanism to load data, so it's easy to add a new file reader. It uses the latest OpenGL technology like, shaders (glsl), vertex buffer object, frame buffer object, and takes in account the power of your graphic card to accelerate the rendering. Millions of particles can be rendered, in real time, with a fast GPU.

Glnemo2 runs on Linux, Windows(using minGW compiler), and MaxOSX, thanks to the QT4 and QT5 API.

Licence:

Glnemo2 is open source and released under the terms of the CeCILL2 Licence

Download

Glnemo2 is available in three versions: stable, daily snaphot and developement

See Changelog

Stable release 1.7.1

Source code

Latest stable release is here -> glnemo2 1.7.1 - July 2014, 11th

To install glnemo2 from sources, see installation.

Mac OS X 10.6 and above binary

Mac OS X binary DMG is here -> glnemo2 1.7.1 - July 2014, 11th

Once you have extracted glnemo2 DMG package, you can install it by dragging glnemo2 icon into Applications folder from finder windows.
To have access to glnemo2 directly from a terminal command line, you have to add the following line into your ".bashrc" file:

export PATH=/Applications/glnemo2.app/Contents/MacOS:$PATH

Windows binary

To install glnemo2 from sources, see installation.

Daily "DMG package" for Mac OS X 10.6 and above ().

Developpement

SVN redmine (preferred method)

Development release is accessible from our SVN server repository via the command:

svn co http://svn.oamp.fr/repos/glnemo2/trunk

CVS nemo

Development release is accessible via NEMO cvs repository.

Download the following tarball

then run following commands:

tar zxvf glnemo2cvs.tar.gz
cd glnemo2cvs
cvs update -d

To install glnemo2 from sources, see installation.

Sample data

Aquarius simulation

Here is a subset of the cosmological Aquarius simulation.

  • RAMSES format
    to display gas particles use the command: glnemo2 output_00193 gas
    to display dark matter particles use the command: glnemo2 output_00193 halo

Supernova 1987A

Here is a simulation snapshot reproducing the triple rings of SN 1987A.
Use the command: glnemo2 sn1987a all

Thanks to Thomas Morris and Philipp Podsiadlowski for giving the data.
The relevant paper is "The triple-ring nebula around SN 1987A: fingerprint of a binary merger. Morris, T., Podsiadlowski, Ph., 2007, Science, 315, 1103"

Here is a glnemo2 movie of SN1987A

Installation

Requirements

Glnemo2 compiles and runs fine on Linux, Windows and MacOSX platform. To compile the project, you need Nokia QT development library (qt > 4.5).

If you don't have Qt installed on your system, you can get it from here:
Go to http://qt-project.org/downloads to download QT, then get and install "Qt libraries" for your specific platform.

It's very important to have a good video card (GPU) with a fast opengl driver. Glnemo2 has been successfully tested on Nvidia and ATI GPU cards. If the installed OpenGL driver is not fully compatible with the requirement, it can also run in software mode.

Compilation

Check out that you have 'qmake' utility in your path ('qmake' is normally included with qt package, but on fedora9, for example , it is called qmake-qt4 since both qt3 and qt4 are still installed there). Change to 'glnemo2' directory and enter commands :

  • Linux and Windows
      qmake -recursive
      make
      
  • Mac OS X
      qmake -spec macx-g++ -recursive
      make
      
  • Linux with cmake (experimental)
    for linux only, if you have cmake package installed, you can try the following :
      cd build
      cmake .
      make
      make install
      

User's Guide

Movies

Trailers

Glnemo2 release 1.50 features

Glnemo2 release 1.40 features

Glnemo2 release 1.30 features

Glnemo2 release 1.20 features

Demo

Tutorials

Scientific

Supernova SN1987a

Emissivity in the solar corona at 171 Angström

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