The visualization toolkit (vtk) is an object oriented, high level library that allows one to easily write c++ programs, tcl, python and java scripts that do 3d visualization.
this package contains exhaustive html documentation for the all the documented vtk c++ classes. the documentation was generated using doxygen and some excellent perl scripts from sebastien barre et. al. please read the readme.docs in /usr/share/doc/vtk-doc/ for details. the documentation is available under /usr/share/doc/vtk/html.