added more information on how to compile the different plugins

README.txt

@@ -17,6 +17,56 @@ be required to create your own system dependant .prf for any used library. For e
 all the rational BRDF fitters use the Eigen library. Therefore it is mandatory that you
 provide a eigen.prf file and that this file is in your QMAKEFEATURES directory.
 
+
+Dependencies:
+ Plugin rational_eigen:  Eigen 
+ Plugin rational_quadprog:  Quadprog++ 
+ Plugin rational_quadproge: Quadprog++ and  Eigen
+ Plugin rational_cgal:  The CGAL library
+ Plugin rational_parallel:  The OpenMP library, Quadprog++ library and Eigen
+ Plugin rational_matlab:  Matlab engine (matlab.prf required)
+
+Eigen Plugins
+
+ You must provide an eigen.prf file that contains
+
+ INCLUDEPATH *= PATH_TO_EIGEN_DIRECTORY
+
+Quadprog++ Plugins
+
+ We provide our own version of quadprog++ which uses Eigen library.
+ To compile it:
+  
+ Go to external/quadprog++/
+ Use qmake (to generale the Makefile)
+ make 
+ 
+ Then create a quadprog.prf file that will include 
+ LIBS *= PATH_TO_LIBQUADPROG/libquadprog++.a
+ QMAKE_LIBDIR *= PATH_TO_LIBQUADPROG
+ INCLUDEPATH *= PATH_TO_LIBQUADPROG_HEADERS
+ 
+
+Parallel Plugin that requires OpenMP
+
+ Create an  openmp.prf file and add the following directives:
+ QMAKE_CXXFLAGS *=-fopenmp
+ 
+
+
+
+Matlab Plugin
+
+ Create an matlab.prf file and add the following directives:
+ The PATH_TO_MATLAB_INCLUDE_DIRECTORY must point to a directory that
+ contains the file engine.h
+
+ INCLUDEPATH *= PATH_TO_MATLAB_INCLUDE_DIRECTORY
+ 
+
+
+
+
 Generate the documentation using Doxygen
   cd ${ALTA}/documents/
   doxygen doxygen.conf