Hey, so I'm currently working on a 3d game project with some other ppl

We want to make a cartoonish game so we are using a Cel/Toon Shader.
So far we already got this implemented but the objects are not throwing any shadows yet.

I looked up a few "tutorials" on shadow mapping but didn't find any that really helped me :/

The Toon Shader we got is implemented in an effect-file and is used on the texture of the models.
It's pretty much the one described here: http://rbwhitaker.wikidot.com/toon-shader


Now I'm looking for a really easy and still effective way of adding shadow mapping or whatever is needed to have the models throw shadows on the ground etc.
(I wished for a solution where I could either just change some parameters in the ToonShadow.fx or a new effect file which could be called after or before the toon shader without adding much more to the actual game files but that doesn't seem to work :/)


If any of you guys got some advice or a good website which maybe even explains the combination of both shaders, I'd appreciate it very much.
This is our first 3D project with XNA / Visual Studio 2010 / C# so please bare with me not being that knowledgable :/

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