http://www.geeks3d.com/20091112/shader-library-dream-vision-post-processing-filter-glsl/ 3D Tech News, Pixel Hacking, Data Visualization and 3D Programming Sat, 20 Mar 2010 13:04:05 +0200 http://wordpress.org/?v=2.9.1 hourly 1 http://www.geeks3d.com/20091112/shader-library-dream-vision-post-processing-filter-glsl/comment-page-1/#comment-8461 Matumbo Fri, 13 Nov 2009 08:29:30 +0000 http://www.geeks3d.com/?p=6113#comment-8461 What do you smoke before going to bed ? What do you smoke before going to bed ?

]]> http://www.geeks3d.com/20091112/shader-library-dream-vision-post-processing-filter-glsl/comment-page-1/#comment-8447 Groovounet Thu, 12 Nov 2009 17:22:20 +0000 http://www.geeks3d.com/?p=6113#comment-8447 Btw, it would be better to save the colorbuffer in black and white to reduce by 3 the memory bandwise of it using a GL_RED texture. Moreover, this allows the use of the gather4 instruction to either reduce the number of texture fetch or increase the blur quality. Btw, it would be better to save the colorbuffer in black and white to reduce by 3 the memory bandwise of it using a GL_RED texture. Moreover, this allows the use of the gather4 instruction to either reduce the number of texture fetch or increase the blur quality.

]]> http://www.geeks3d.com/20091112/shader-library-dream-vision-post-processing-filter-glsl/comment-page-1/#comment-8446 Groovounet Thu, 12 Nov 2009 17:16:37 +0000 http://www.geeks3d.com/?p=6113#comment-8446 c.rgb = vec3((c.r+c.g+c.b)/3.0); It's not really a proper way to do color to B/W convertion. Your conversion display a B/W with a kind of purple filter. A standard establish weights for this purpose: R * 0.33, G * 0.59, B * 0.11. It represents the eye sensibility for each channel. c.rgb = vec3((c.r+c.g+c.b)/3.0);
It’s not really a proper way to do color to B/W convertion. Your conversion display a B/W with a kind of purple filter.
A standard establish weights for this purpose: R * 0.33, G * 0.59, B * 0.11.
It represents the eye sensibility for each channel.

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