glnemo2

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 Nokia QT 4.X API) , powerful with a fast 3D engine (OPenGL and GLSL), and generic with the possibility to load different kinds of input files.


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.

Currently, glnemo2 reads:
- NEMO files (http://carma.astro.umd.edu/nemo)
- Gadget 1 and 2 -little and big endian- files (http://www.mpa-garching.mpg.de/gadget/)
- RAMSES files (http://irfu.cea.fr/Projets/Site_ramses/RAMSES.html)
- FTM files (Clayton Heller's sph/nbody code)
- phiGRAPE file (http://wiki.cs.rit.edu/bin/view/GRAPEcluster/phiGRAPE)
- list of files stored in a file
- realtime gyrfalcON simulation via a network plugin (see $NEMO/usr/jcl/glnemo2/gyrfalcon/README)

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

Trailer: http://www.youtube.com/watch?v=QKmQiYwGNpk

1.53 (January, 9th 2013)
- bug fix release
- phiGrape snasphots can be loaded again (see issue #443)

1.52 (December, 1st 2012)
- bug fix release
- bug fix on temperature with gadget files
- fix about rescaling data when physical values are negative
- ramses files, give time in giga years
- ramses files, fix crash when no hydro files
- ramses files, resize positions and hsml with respect of boxlen

1.51 (July, 26th 2012)
- bug fix release
- fix density threshold not correctly set between frames (see issue #125)
- fix bug on accumulation blending rendering (key press "m")

1.50 (May, 31st 2012)
- add GUI option to control timeline and
to play forward and backward direction from a list of snaphots
- add option to render opaque sphere like the SUN
- add GUI and CLI for center of density option

1.42 (May, 16th 2012)
- happy qt4.6 compilation

1.41 (February, 15th 2012)
- fix wrong density value displayed on colorbar when min/max phys set from cli
- fix compilation issue with gyrfalcON manipulator

1.40 (February, 08th 2012)
- rotation interface totally rewritten. Rotations are now applied around
SCREEN axis x,y,z, which are fixed. It's more intuitive for the user.
- add new tab option to manage automatic rotations
- add screen axis display
- add orthographic projection
- density threshold controlled with mouse middle button
- fix bug#58 crashs on ramses file loading
- fix bug#61 colorbar disapear on ATI/Intel hardware
- happy qt4.8 compilation

1.30 (November, 25th 2011)
- add color bar display on 3D view (see "color bar" tab)
- fix a bug when physical values are out of limits
- fix a bug when list of files contains blank lines
- experimental object creation

1.20 (May, 3rd 2011)
- new rendering pipeline based on a new shader
- better interactivity with density threshold
- faster rendering according to density threshold
- experimental temperature display sorted by density
- all components are selected when, from cli, select="all"
- add hotkeys to autorotate around x,y,z axis counter clockwise
- add lmin value for ramses amr file
- fix bug on histogram display if phys value