PlopByte

gentoo-packages

Mon, 12 May 2008 11:13:06 GMT

Gentoo package is a mercurial repository containaing OpenSceneGraph and my own projects ebuild. Following instruction will install the last version available (OpenSceneGraph-2.4) in the repository.

install mercurial and layman

emerge layman mercurial

add layman make.conf to the main make.conf

echo "source /usr/portage/local/layman/make.conf" >> /etc/make.conf

edit /etc/layman.cfg

overlays  : http://hg.plopbyte.net/gentoo-packages/raw-file/e6b4fc0d766a/list.xml
                   http://www.gentoo.org/proj/en/overlays/layman-global.txt

nocheck  : yes

then add the overlay

layman -a mornifle-gentoo-package

then emerge

emerge openscenegraph

if you want to install previous or specific version of OpenSceneGraph you can try something like

emerge =media-gfx/openscenegraph-1.2.0-r3
emerge =media-gfx/openscenegraph-2.0-r0
emerge =media-gfx/openscenegraph-2.2.0-r0
emerge =media-gfx/openscenegraph-2.3.5 # this one is masked because it was a developer release
emerge =media-gfx/openscenegraph-2.4.0-r1

Other instruction to install layman is available here http://gentoo-wiki.com/TIP_Overlays#Layman
If you notice any problem or you want to report something, write to mailto:mornifle@plopbyte.net

Vserver on dedibox

Sat, 03 May 2008 21:06:00 GMT

After 8 months and on dedibox with a gentoo as host I must say it's not ready and stable as it should be, so i reinstalled my dedibox with a debian host and differents type of guest vserver (debian and gentoo).
With debian there is no problem it works out of the box, but with gentoo there is issue related to init script and lo/127.0.0.1. I will explain the history, it maybe helps other people. On gentoo when you want to start eg apache daemon the init script try to run net service because apache depends on it (and many others), but the problem with vserver is that lo and 127.0.0.1 is something special and there is no lo device when you list net devices by default. So a net service does not start in guest gentoo without modification. There is a tricks to add a lo interface with 127.0.0.1 inside the guest (configuring an lo interface with nodev and 127.0.0.1 in ip on the host /etc/vservers/foo/interface/x). With that net service can start but lo and 127.0.0.1 but there is side effect, it's not possible to ping and access external network (unable to ping google or yahoo). The good solution should be to be able to start services without lo/127.0.0.1 interface. I find a fix, i have not used it for a long time ago so there is maybe side effect but i did not notice yet. The fix consist of removing depends to net services in init script. It's not a good way to fix every init script, so i tried to dummy the net service, it seems to work here the script to fix a gentoo vserser.

#!/bin/bash

set -x
serv=$1
serverpath=/var/lib/vservers/$serv
if [ -z $serv ]
then
    echo "usage ${0} : vserver"
    exit 0
fi

if [ ! -f ${serverpath}/etc/gentoo-release ]
then
    echo "no vserver ${serv} found or it's not a gentoo type"
    exit 0
fi


if [ ! -f ${serverpath}/etc/init.d/net.lo ]
then
    echo "nothing to fix for ${serv}, ${serverpath}/etc/init.d/net.lo not found"
    exit 0
fi
echo "fixing ${serv}"
cp -a ${serverpath}/etc/init.d ${serverpath}/etc/bakup_init.d
rm ${serverpath}/etc/init.d/net.lo ${serverpath}/etc/init.d/netmount
touch ${serverpath}/etc/init.d/net
chmod +x ${serverpath}/etc/init.d/net

links:
http://garden.dachary.org/universe.html

Profile & Contact

Sun, 27 Apr 2008 19:03:00 GMT

Most of my time are spent working with OpenSceneGraph on free software project. My reference and CV
mailto:mornifle@plopbyte.net

2007-05 to 2007-07 - Developper for Neuf Cegetel

Easy3d

2004-02 to 2007-03 - Developper at Mekensleep

Pok3d

2000-11 to 2003-01- Developper at Nemosoft

Cars'n'Girls

SharpShooter

Taxi 3

Trackdown

Links

Sat, 26 Apr 2008 14:14:00 GMT

gentoo-packages

MainMenu

Sat, 26 Apr 2008 14:13:00 GMT

PortFolio

Articles

ProjectorVisitor
EarthManipulator
PatchLODDatabase
ProjectShapeToGeometryLOD
OSG SplashScreen
OSG BetSlider
Easy3d
Vserver on dedibox
Pok3d
GLSL Glass effect
ODE Physic and Collision
Intro Morph-SynRJ
Demo Abstract-SynRJ

Profile & Contact

Projects

AnimTK
WiiMelon

Links

gentoo-packages

AnimTK

Sun, 13 Apr 2008 21:13:00 GMT

http://hg.plopbyte.net/animtk
http:/animtk.plopbyte.net

DefaultTiddlers

Sun, 06 Apr 2008 22:57:00 GMT

PortFolio

Plugin listTags

Sun, 06 Apr 2008 22:57:00 GMT

config.macros.listTags = { text: "Hello" };
config.macros.listTags.handler = function(place,macroName,params)
{
var tagged = store.getTaggedTiddlers(params[0]);
var ul = createTiddlyElement(place,"ul",null,null,"");
for(var r=0;r<tagged.length;r++)
{
var li = createTiddlyElement(ul,"li",null,null,"");
createTiddlyLink(li,tagged[r].title,true);
}
}

SiteSubtitle

Sun, 06 Apr 2008 22:57:00 GMT

soup of bytes to bit

SiteUrl

Sun, 06 Apr 2008 22:57:00 GMT

http://www.plopbyte.net/

PortFolio

Thu, 14 Feb 2008 13:18:00 GMT

Click on Articles to see everything in one page


www.pok3d.com	www.pok3d.com

Source Code	Source Code

Articles

Thu, 14 Feb 2008 13:18:00 GMT

ProjectorVisitor

2008-01
The last month i wrote an application to display tiff georeferenced where you can project misc other object, like polygons, lines, points. The idea is to find which squares of the heightfiled touched by the object you want to project (for lines and triangles).

For triangles i find the contours, then i use the osgUtil::Tesselator and use the mode equal 2 it's like a And between 2 polygons. Then for the center of the triangle not touch by the contours i generate a quads from the heightfield directly. An improvement should be to replace the osgUtil::Tesselator by an efficient specialized clipper triangle/square
For lines it's easy i just need to intersect each grid boundary with the line then i sort the result and project each interesection points to the corresponding triangle from the good square.
For points i just select to good square and the good triangle and i project on that triangle

You can browse the code here

EarthManipulator

2007-11
It just a simple osgGA::Manipulator used for display planet with a tilt, heading, and trackball behaviour, like the standard OpenSceneGraph trackball manipulator. You can browse the code here

PatchLODDatabase

2007-11
This tool was made to add a patch details (high resolution) to an existing database (ive) without rebuilding everything. The algorithme is very simple, it builds with osgdem the part of patch you want, using very low res data for the rest of world, when the build is finished you have to report the patch coordinate tile in the osgDB::DatabasePager (a modified version) with the directory where to get those new data. Then in real time the osgDB::DatabasePager will make the hook based from filename request by a osg::PagedLOD (the name contains the tile coordinate), if the coordinates are inside the 'box' of the patch we built we will use data from the new directory. With this process you can make a low res Earth, and after build details part as you want, it can be used to run multi-process of osgdem for differents details zone on a multi core processor. In the screenshot, i use a very low res earth and a higher res for the france, the france was pre processed on another machine. I configured the DataPager patched to get it.

ProjectShapeToGeometryLOD

2007-11
ProjectShapeToGeometryLOD is a program to project a geometry on another as preprocess pass, and write as result projected shape. It's used in a simulation project when you have a big database of geometry (the Earth) and you want to add frontiere on it. If we dont project this shape on the geometry, the shape is under the Earth or in the sky (when you navigate the world). As you can see there is some Z issue because the level of detail used to project the shape is not the same ( in real time it change with the distance), but it's enough near to use a polygon offset. The other way could be to have a shape projected for each LOD of Earth, it would be perfect but need more data and pre processing time.

OSG SplashScreen

2007-09
It's a small OpenSceneGraph nodekit to display splashscreen, with a progress bar that display the loading state. The mercurial repository contains the nodekit with unittest, coverage and valgrind check.

OSG BetSlider

2007-09
It's an OpenSceneGraph GUI NodeKit to display BetValue in Pok3D. It works in vertical and horizontal. There are coverage, unittest, and valgrind check in the mercurial repository. There is example with all cases in the mercurial.

Easy3d

2007-08
Easy3d is a 3d front end for application on EasyGate plateform, for users who are not familiar with computer. The application is designed to runs on a Intel chip 855 with a Celeron 600. It uses OpenSceneGraph , AnimTK and libxmxl2. We use OpenSceneGraph without osgUtils so this application is also an example for developpers who wants to see how to fully control the rendering with osg without the osgUtils. Here an installer for windows to test application. And here the video

Pok3D

2007-02
You can see video of Pok3d my last project

GLSL Glass effect

2005-11
Here a try to make a glass shader on a sphere you can see the code here. And there is a small video below.

ODE Physic and Collision

2005-05
Here some try about ode, you can check the code here. You can find video about these tests below

Intro Morph-SynRJ

2004-01
Hi guys, this is a good news for syn[rj] and me. We won the second prize at the st(art) 2004 with our intro 64k called morph. Here some screens. This production was made in 2 weeks and half so the quality reflect the time to develop it. You can get the source code here and the release version here. You can find others productions of syn[rj] here.

Demo Abstract-SynRJ

2003-08
This the demo that we have presented at the ASM (2003) competition made in 7 days, try it. You can find others prods of the same group here

You can find the demo here

WiiMelon

Mon, 04 Feb 2008 11:23:00 GMT

http://hg.plopbyte.net/wiimelon
http://www.plopbyte.net/wiimelon.html

PatchLODDatabase

Fri, 18 Jan 2008 21:44:00 GMT

ODE Physic and Collision

Fri, 18 Jan 2008 21:30:00 GMT

2005-05
Here some try about ode, you can check the code here. You can find video about these tests below

OSG BetSlider

Fri, 18 Jan 2008 21:30:00 GMT

OSG SplashScreen

Fri, 18 Jan 2008 21:30:00 GMT

ProjectShapeToGeometryLOD

Fri, 18 Jan 2008 21:30:00 GMT

Easy3d

Fri, 18 Jan 2008 21:30:00 GMT

GLSL Glass effect

Fri, 18 Jan 2008 21:29:00 GMT

2005-11
Here a try to make a glass shader on a sphere you can see the code here. And there is a small video below.