Cedric Pinson - OpenGL / OpenSceneGraph / WebGL

WebGL Particles

admin — Tue, 17 Aug 2010 01:24:58 +0000

I have played with render to texture to generate particles with physics, the idea is to compute particles position on the gpu and use it as input to render them. For this I have use the firefox logo in 512×512 so we have 262144 particles animated even if somes are invisibles. You can find some useful information from this articles http://directtovideo.wordpress.com/2009/10/06/a-thoroughly-modern-particle-system/
Ideally It would be great to have render to texture that support floating point for webGL, but without that I did a 16 bits precision with two textures ( high bits and low bits). It’s a bit boring, in fact It breaks me to try more effects, I would really like to have render to texture with floating point support.

To get a WebGL Implementation have look to Khronos instructions http://www.khronos.org/webgl/wiki/GettingaWebGL_Implementation

You have a browser that is able to run webGL try the realtime version http://plopbyte.net/webgl-particles-demo/

ArtGame weekend

admin — Mon, 05 Jul 2010 22:37:52 +0000

A Month ago, we have participated to the artgame weekend . The idea is to make a game in 48h on a mobile platform. I joined Chen to work on her concept, the idea was to use a guitar hero gameplay on an Hitler speech. The concept is strong and make people feel uncomfortable with the game.
I have made the choice to work on android because I have a HTC hero and it’s more open than Iphone. When I started I had just installed eclipse on my ubuntu box and tried the hello world example. I am a novice on mobile platform. 48h later I am really impressed by this experience.
The workflow to test and develop android apps with eclipse was impressive. It just worked as expected. usually I am an emacs users, but for this experience I have used the ‘regular’ path as explained on the android sdk.

At the end we had a game, but we worked more after the weekend to release it. Because of the sensible subject the game is, we had to adjust/change some part. The source code is in GPL you can get it here

links:
adroidlib
androidzoom

WebGL OpenSceneGraph

admin — Sat, 17 Apr 2010 17:51:51 +0000

I am currently experimenting WebGL. I work with OpenSceneGraph and wanted to try something equivalent in javascript. Even though javscript is slower than C++ i wanted to try a proof of concept with WebGL and create a library similar to OpenSceneGraph. After experimenting a bit, i am convinced that a minimal OpenSceneGraph implementation would makes sense for developer to create new 3d applications on the web. I will continue in this direction and add features step by step… I did not implement reader of obj, collada or other files types, instead i created a json writer plugin for OpenSceneGraph then i am able to convert all input format that OSG is able to read and convert them into json. The idea is setup a webservice that will convert input files and return json files to use in javascript.
The current demo uses few features, there is multitexturing (no dynamic lighting yet). I tried to implement the shader compositor like Roland submitted into OpenSceneGraph. My implementation is quick and dirty, so a lot of improvement will come soon.

To get a WebGL Implementation have look to Khronos instructions http://www.khronos.org/webgl/wiki/GettingaWebGL_Implementation

You have a browser that is able to run webGL try the realtime version http://plopbyte.net/webgl-openscenegraph-demo

Global Game Jam 2010

admin — Mon, 01 Feb 2010 20:48:04 +0000

We participated in the global game jam 2010. The idea was to create an entire (small) game in 48 hours with a given theme. This year the theme was ’seduction and deception’. Our game was called PrincessKunKunPechoPecho and was created with the blender game engine so that we could experiment a bit with it. We should have spent some time learning about it before because we spent too much of our precious little 48 hours learning about it during the session.. Anyway here is the result

Have a try
http://www.globalgamejam.org/2010/princesskunkunpechopecho

PokMe Live Stream

admin — Fri, 11 Dec 2009 13:31:36 +0000

I added a live stream to pokme to follow the game in real time. It saves every frame of the game and sends them to gstreamer, which forwards the frames to a server using fluxmotion to combine and broadcast the stream. This project was done for Outflop.
You will need Firefox 3.5 to view the ogg stream

PokMe Live Stream

admin — Fri, 11 Dec 2009 12:17:53 +0000

osgDirectShow

admin — Tue, 29 Sep 2009 10:30:00 +0000

I wrote an OpenSceneGraph DirectShow plugin for Tharsis Software . The project’s goal was to render four video/audio streams (four blackmagic cards) for television channels (France 3 , 18h30).

You will need a browser that supports ogg files such as Firefox 3.5.

Dragger and Multi Selection

admin — Tue, 29 Sep 2009 10:25:00 +0000

Introduced a multi-selection module (drag the selection, rotate it) to an existing application called Life Explorer for the Fondation Fourmentin Guilbert. It demonstrates the use of osgManipulator from OpenSceneGraph. The manipulator was modelled after those you would find in existing software packages like Blender, 3DSMax, or Maya.

osgDirectShow

admin — Tue, 11 Aug 2009 13:44:48 +0000

I wrote an OpenSceneGraph DirectShow plugin for Tharsis Software . The project’s goal was to render four video/audio streams (four blackmagic cards) for television channels (France 3 , 18h30).

You will need a browser that supports ogg files such as Firefox 3.5.

Demo Abstract-SynRJ

admin — Mon, 27 Jul 2009 11:56:00 +0000

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