I have good knowledge of OpenGL but not of the shaders or any shading language. I looked at this tutorial:
http://www.delphigl.com/script/do_show. ... g&action=2
Because my knowledge of German is non-existent, I used babelfish to translate it to English but I found the result less comprehensible then the original German.
What really, really intrigues me about this article are the following two screenshots:
It seems to be saying that you have a colour-index texture (the first image), and then 3 other textures (grass, sand water), and then you use a shader to blend the 3 textures according to what is the colour-index (or combination of colour indexes, which produces nice blending). The result is the second image.
I would love to see this implemented with some Delphi or FreePascal code. The example could be very simple, no complex geometry, just a single quad. Because this is just the sort of thing that would be useful in a game which lets users create their own levels. With this technology, a user could colour an image with three colours, red, green and blue, each colour representing a different texture and ground type. The game would then use this image directly to produce the sort of multitextured scene you see in the second image above. That's beautiful!
So who is generous and talented enough to create such an example? I think a lot of people will be grateful for it.
