hello guys!! lets say i have a wood texture! if i want to use bump mapping i must also have a normal map or a height map for his texture. If i dont have it how i can create it? maybe with photoshop? and how? thanks in advance!

Yeah, you can create it in photoshop. Depending on how you're implementing it, it's probably easiest to make a height map in photoshop. Make a black/white document, and try to visualize the 3d shape you want the texture to have and use varying levels of black/white/greay to generate the heights. Then from this height map, you can generate a normal map (in directx you can use the function "GenerateNormalMapFromHeightMap" or something like that... not sure if openGL has something similar, but I bet it does).

You could also take the wood texture and convert it to greyscale then play with contrast/brightness to get the results you want.
This is the quick and dirty way.
Just be sure to 'save as' so you don't loose the original texture.

unless your a superhuman thier is no posible way to create a normal map your self. use 3d studio max to create your normal maps.

http://developer.nvidia.com/object/nv_texture_tools.html

The link Catalyst posted has the Photoshop plugin to create normal and height maps which works just fine for textures.

I dunno tho why you would want a bumpmap aditionally, it's an obsolete renderpass more having the normalmap already.
If you have normalmaps generated from hires 3d models you can use a bumpmap to add the small details that weren't on the hipoly model (scales/skin effects etc).
However, if you generate the normalmap from a texture all the detail will be there.

If you have a renderpass to give away in a game engine i'd rather spend it on a specularity map to tone down and control the gloss effecs of the normalmaps.