Hi all i ported a normal mapping example from a pc demo. It is on my website + source code. It uses GL extensions ARB_texture_env_dot3, ARB_multitexture, ARB_texture_cube_map and ARB_texture_env_combine. I never used any of this before and don't have the faintest idea what they do. I just ported it, so don't ask me for advise.

I have problems with my website so i post two links (one with www and one without)




Source code and app:

http://revaro.net/developer/SimpleBump.zip
http://www.revaro.net/developer/SimpleBump.zip

To be complete I also add the text of the readme (since I am not the official author of the code)



It works on a redeon 7000 !

Still I have some requests:

1. Can Anyone Add code for Spectacular lighting? That would be real sweet.
2. I have a lot of regular textures which I would like to have bump mapped. Is there any tool that has an algorithm for generating bump maps from a 2D texture? Note that converting it to grey values and using a height map to normal map converter doesn't work. A topdown view of a pyramid for example would in a height map just be 4 triangle planes of the same height. What you want is sloped plains with the brightest point in the center. Also such a tool needs to be able to ignore decals and surfacecolors. I know this is a pretty impossible task. The human eye can make up a 3D representation of a 2D image, but for a computer algorithm it is pretty complicated.

a. Specular lighting.

b. analysis of 2D images to extract depth information is cutting edge research. I don't know of any simple tool to do it.

Works very nice in 32-bit. Crashes when monitor is set to 16-bit but tells you why it crashed so it's not too bad. Getting a bump-map from existing 2D textures isn't possible for most images. You'll have to use 3D models and render them three times with one light source placed on top, front and the side and save each grayscale image into the RGB channels of the normal texture.

This might help you out: http://members.shaw.ca/jimht03/normal.html

really nice demo

hangt5 Wrote:This might help you out: http://members.shaw.ca/jimht03/normal.html

Yeah, those tutorials require me to have 3D geometrical data. I haven't seen any tutorial that takes a 2D texture as a base starting point. My best bet is just to make greyscale images of the textures I have and use those as height maps which I can use to generate normal maps. For textures for which this is not possible I must manually create them in a paint program or recrete the geometry in a 3D program and then render it as a normal map.