http://www.numb3r23.net/webGLex/paccer

Even though it has a distinct “retro” look, I added an FXAA-aliasing and a bloom-filter to it. I tried doing some dynamic cube-map for floor-reflections, but it didn’t fit the theme.

Maybe in an extended version could not only add more enemies (Blinky, Inky, Pinky, Clyde) but also some more fx. I loved Geometry wars, maybe some effects from them could fit in here…

http://numb3r23.net/webgl/vertexAndImages

Here are selected screenshots:

The effects implemented are:

• Vertex shader displacement
• TwoTone shading
• CEL-Shading
• Gaussian Blur
• Image Enhancement by unsharp masking the depthbuffer
• Gamma/Contrast/Brightness adjustment

https://github.com/numb3r23/GLSLShaderLib

I’m planning on continuously adding shaders.

https://github.com/numb3r23/ScIll-library

here’s a feature list:

• OpenGL 3.2 core profile rendering
• cpp, compiles with gcc & VS 2010
• cmake project-file
• focus on Imagefilters via GLSL fragment-shader

Here’s a little code example on the usage:

using namespace SciIllLib;

CFilter fltFXAA = new CFilter();
fltFXAA->LoadFragmentShader("res/glsl/filter/FXAA.frag");

SFilterEngine::ReGenerateTexture(&m_rtScene, GL_FLOAT); SFilterEngine::ReGenerateTexture(&m_rtFinal, GL_FLOAT);

SFilterEngine::PreRender(m_rtScene);
... render as usual ...
SFilterEngine::PostRender();

SFilterEngine::Apply(fltFXAA, m_rtScene, m_rtFinal);
SFilterEngine::ToScreen(fltDisplay, m_rtFinal);

Of course it can do much more – load textures, load models, …

More generally speaking it does dynamic thin-film interference of hollow convex two-sided objects in a deferred rendering configuration. In two passes front and back are rendered and the ray is traced through the object. To give you a better idea I screen-captured my demo-program and uploaded it:

As before all physical parameters of the shader can be changed at runtime (as seen in the above video). Bear in mind, that the program uses OpenGL 3.2 core and runs on my late iMac 2011 – it uses a Radeon 6960M, a mobile GPU.

The cube maps are from Emil Persson and can be found at humus’s textures. The head model is copyrighted to © I-R Entertainment Ltd., taken from Morgan McGuire‘s Graphics Data.

Here’s a textual description:

1. A simple film with constant thickness covers the object.
2. The surface of the object is “bumped” and the film has a constant thickness.
3. Both object and film use regular normals, but the thickness of the film varies. This is fake but looks nice:D.
4. The object remains unchanged while the film (thickness + normal) is bumped. Basically 3, but correct.
5. The object is bumped and the thickness is modulated such that the film’s surface is “flat”(like setup 1). The inverse scenario of 4.

Finally some screenshots from the same angle and same film settings: refraction index=1.09, tilm-thickness:550-1170nm, CIE D65 light, silver material. The matte utah teapot is shown on the left, the shiny teapot on the right:

(Click on image to enlarge)

I hope to be able to record a demo video soon (~ this week). While going through the sourcecode I also noticed that there’s no dispersion as the refraction index is const. This should be easily adjustable, I just need some data. 

Also, while the uffizi gallery is nice I’d like to try out some other cubemaps (m.be. from Humus) and some other models. Maybe a wobbling soapbubble?

Besides I still have other work todo, writing down my ph.d thesis…

It’s written in C# and allows you to create, edit and manage spectral data.

• Spectras can be manually entered, imported from CSV, captured from an image, ….
• Libraries can be saved/loaded/exchanged
• Spectras can be put together in collections and stored into various filetypes
• Spectral points are interpreted as peaks or as linear interpolation guides
• Few lights & material spectras are provided in data-subfolder

I needed it for a spectral-rendering project to manage and export textures containing the spectral data.

int query_NPOT_capability( void ){
  ...
  if((NULL == strstr( (char const*)glGetString( GL_EXTENSIONS ), 
      "GL_ARB_texture_non_power_of_two")){
  ...

This mechanism can be found elsewhere too. As this specific feature is definitely part of OpenGL 3.2 core the problem was easy to resolve (remove the check) and it works now as expected. Yay!

Abstract
Scientific illustrations are used for centuries in several scientific domains to communicate an abstract theory and are still created manually. In this article we present a GPU-based illustration pipeline with which such illustrations can be created and rendered in an interactive process. This is achieved by combining current non-photorealistic-rendering algorithms with a manual abstraction mechanism and a layer-system to combine multiple techniques. The pipeline can be executed completely on the GPU.

@ 15. Anwendungsbezogener Workshop zur Erfassung, Modellierung, Verarbeitung und Auswertung von 3D-Daten, Berlin (2012)
3DNordOst2012.bib