Modification of NearToFarField of Mohamed to print the far field vector...

Modification of NearToFarField of Mohamed to print the far field vector instead of modulus in matlab file.
To test!

Plugin/NearToFarField.cpp

@@ -78,6 +78,7 @@ StringXString *GMSH_NearToFarFieldPlugin::getOptionStr(int iopt)
 // Element Analysis of Antennas and Arrays", p. 176. This is not the usual `far
 // field', as it still contains the e^{ikr}/r factor.
 double GMSH_NearToFarFieldPlugin::getFarFieldJin(std::vector<element*> &allElems,
+                                                 std::vector<std::vector<double> > &farfieldvector,
                                                  std::vector<std::vector<double> > &js,
                                                  std::vector<std::vector<double> > &ms,
                                                  double k0, double rFar, double theta,
@@ -178,6 +179,7 @@ double GMSH_NearToFarFieldPlugin::getFarFieldJin(std::vector<element*> &allElems
 // Compute far field using e^{-i\omega t} time dependency, following Monk in
 // "Finite Element Methods for Maxwell's equations", p. 233
 double GMSH_NearToFarFieldPlugin::getFarFieldMonk(std::vector<element*> &allElems,
+                                                  std::vector<std::vector<double> > &farfieldvector,
                                                   std::vector<std::vector<double> > &js,
                                                   std::vector<std::vector<double> > &ms,
                                                   double k0, double theta, double phi)
@@ -226,9 +228,16 @@ double GMSH_NearToFarFieldPlugin::getFarFieldMonk(std::vector<element*> &allElem
   prodve(xHat, integral_r, xHat_x_integral_r);
   prodve(xHat, integral_i, xHat_x_integral_i);
   std::complex<double> coef = I * k0 / 4. / M_PI;
+  double  coef1 =  k0 / 4. / M_PI;
   std::complex<double> einf[3] = {coef * (xHat_x_integral_r[0] + I * xHat_x_integral_i[0]),
                                   coef * (xHat_x_integral_r[1] + I * xHat_x_integral_i[1]),
                                   coef * (xHat_x_integral_r[2] + I * xHat_x_integral_i[2])};
+
+   for(int comp = 0; comp < 3; comp++){
+      farfieldvector[comp][0] = -coef1 * xHat_x_integral_i[comp];
+      farfieldvector[comp][1] =  coef1 * xHat_x_integral_r[comp]; 
+     }
+
   return (norm(einf[0]) + norm(einf[1]) + norm(einf[2]));
 }
 
@@ -356,6 +365,18 @@ PView *GMSH_NearToFarFieldPlugin::execute(PView * v)
   std::vector<std::vector<double> > phi(_NbPhi + 1), theta(_NbPhi + 1);
   std::vector<std::vector<double> > x(_NbPhi + 1), y(_NbPhi + 1), z(_NbPhi + 1);
   std::vector<std::vector<double> > farField(_NbPhi + 1);
+  std::vector<std::vector<double> > farField1r(_NbPhi + 1);
+  std::vector<std::vector<double> > farField2r(_NbPhi + 1);
+  std::vector<std::vector<double> > farField3r(_NbPhi + 1);
+  std::vector<std::vector<double> > farField1i(_NbPhi + 1);
+  std::vector<std::vector<double> > farField2i(_NbPhi + 1);
+  std::vector<std::vector<double> > farField3i(_NbPhi + 1);
+  std::vector<std::vector<double> > farfieldvector(3);
+
+  for(int comp = 0; comp < 3; comp++){
+      farfieldvector[comp].resize(2);
+     }
+
   for (int i = 0; i <= _NbPhi; i++){
     phi[i].resize(_NbThe + 1);
     theta[i].resize(_NbThe + 1);
@@ -363,6 +384,13 @@ PView *GMSH_NearToFarFieldPlugin::execute(PView * v)
     y[i].resize(_NbThe + 1);
     z[i].resize(_NbThe + 1);
     farField[i].resize(_NbThe + 1);
+
+    farField1r[i].resize(_NbThe + 1);
+    farField2r[i].resize(_NbThe + 1);
+    farField3r[i].resize(_NbThe + 1);
+    farField1i[i].resize(_NbThe + 1);
+    farField2i[i].resize(_NbThe + 1);
+    farField3i[i].resize(_NbThe + 1);
   }
 
   double dPhi = (_phiEnd - _phiStart) / _NbPhi;
@@ -373,15 +401,29 @@ PView *GMSH_NearToFarFieldPlugin::execute(PView * v)
     for (int j = 0; j <= _NbThe; j++){
       phi[i][j] = _phiStart + i * dPhi ;
       theta[i][j] = _thetaStart + j * dTheta ;
-      if(_negativeTime)
-        farField[i][j] = getFarFieldMonk(allElems, js, ms, _k0,
+      if(_negativeTime){
+        farField[i][j] = getFarFieldMonk(allElems, farfieldvector, js, ms, _k0,
                                          theta[i][j], phi[i][j]);
-      else
-        farField[i][j] = getFarFieldJin(allElems, js, ms, _k0, 10 * lc,
+        farField1r[i][j] =  farfieldvector[1][0];
+        farField2r[i][j] =  farfieldvector[2][0];
+        farField3r[i][j] =  farfieldvector[3][0];
+        farField1i[i][j] =  farfieldvector[1][1];
+        farField2i[i][j] =  farfieldvector[2][1];
+        farField3i[i][j] =  farfieldvector[3][1];}       
+      else {
+        farField[i][j] = getFarFieldJin(allElems, farfieldvector, js, ms, _k0, 10 * lc,
                                         theta[i][j], phi[i][j]);
-      ffmin = std::min(ffmin, farField[i][j]);
-      ffmax = std::max(ffmax, farField[i][j]);
-    }
+        farField1r[i][j] =  farfieldvector[1][0];
+        farField2r[i][j] =  farfieldvector[2][0];
+        farField3r[i][j] =  farfieldvector[3][0];
+        farField1i[i][j] =  farfieldvector[1][1];
+        farField2i[i][j] =  farfieldvector[2][1];
+        farField3i[i][j] =  farfieldvector[3][1];}
+
+        ffmin = std::min(ffmin, farField[i][j]);
+        ffmax = std::max(ffmax, farField[i][j]);
+     }
+      
     Msg::ProgressMeter(i, _NbPhi, true, "Computing far field");
   }
   for(unsigned int i = 0; i < allElems.size(); i++)
@@ -428,6 +470,14 @@ PView *GMSH_NearToFarFieldPlugin::execute(PView * v)
       printVector(fp, "phi", phi);
       printVector(fp, "theta", theta);
       printVector(fp, "farField", farField);
+
+      printVector(fp, "farField1r", farField1r);
+      printVector(fp, "farField2r", farField2r);
+      printVector(fp, "farField3r", farField3r);
+      printVector(fp, "farField1i", farField1i);
+      printVector(fp, "farField2i", farField2i);
+      printVector(fp, "farField3i", farField3i);
+
       printVector(fp, "x", x);
       printVector(fp, "y", y);
       printVector(fp, "z", z);

Plugin/NearToFarField.h

@@ -36,11 +36,13 @@ class GMSH_NearToFarFieldPlugin : public GMSH_PostPlugin
   PView *execute(PView *);
 
   double getFarFieldJin(std::vector<element*> &allElems,
+                        std::vector<std::vector<double> > &farfieldvector,
                         std::vector<std::vector<double> > &js,
                         std::vector<std::vector<double> > &ms,
                         double k0, double r_far, double theta, double phi);
 
   double getFarFieldMonk(std::vector<element*> &allElems,
+                         std::vector<std::vector<double> > &farfieldvector,
                          std::vector<std::vector<double> > &js,
                          std::vector<std::vector<double> > &ms,
                          double k0, double theta, double phi);