Direct Volume Rendering with C language

[giuseppefrattura]

Hi my name is Giuseppe and i'm a ICT student from Italy.
During my Computer Graphics course my teacher gives me a task with openGL and in particular on Direct Volume Rendering.
I found many articles about it but all the code is written in CG (nVidia Language) and OpenGL Shading Language.
I'm searching for some C or C++ code that make some simple example of Direct Volume Rendering (Volume Ray casting or Splatting or Shear warp).

I hope that you can help me

Thank you!

[dragon_fly]

volvis 1.1 is your best choice ,the souce code is very simple.
Not like VTK,very complicated!
When search volvis 1.1 with google,you will see"Download VolVis 1.1 with MSVC++ 6.0 Source Code - ZIP file, 106KB. Screenshot. "