implemented example for FFT propagation in GRIN media

.gitignore

@@ -3,11 +3,21 @@
 /Default/
 /QMake-build/
 /build-program-Desktop-Debug/
+/build*
 bin_o/
 html
 latex
 run
 *.dx
 config.pri
+configMy.pri
 source/program.pro
 *.user
+*.vtk
+*.Debug
+*.Release
+*.stash
+*pro.user*
+*pro.user
+/program2D/Makefile
+/program2D/debug/
\ No newline at end of file

program2D/main.cc

@@ -9,6 +9,7 @@
 #include <string>
 #include <vector>
 #include "source/ugblock2D.h"
+#include "source/ugblock.h"
 
 
 using std::complex;
@@ -581,6 +582,9 @@ int main(int argc, char** argv) {
 
     double wavenumber = 2.0 * M_PI / lambda;
     
+    VTK_Reader reader()
+
+
     cout << " Test CalcFresnel!!" << endl;
 
     std::cout << "distance = " << distance << std::endl;