Modified P2M (of ChebInterp) so that mult exp is updated instead of set in an...

Modified P2M (of ChebInterp) so that mult exp is updated instead of set in an adaptive context (already done in UnifInterp).

Src/Kernels/Chebyshev/FChebInterpolator.hpp

@@ -637,14 +637,12 @@ inline void FChebInterpolator<ORDER,MatrixKernelClass>::applyP2M(const FPoint& c
                                                                  FReal *const multipoleExpansion,
                                                                  const ContainerClass *const inParticles) const
 {
-    // set all multipole expansions to zero
-    // Should not be set to zero here (TODO remove this line) FBlas::setzero(2*nRhs*nnodes, multipoleExpansion);
 
     // allocate stuff
     const map_glob_loc map(center, width);
     FPoint localPosition;
 
-//    FReal W1 = FReal(0.);
+    // Init W
     FReal W1[nRhs];
     FReal W2[nRhs][3][ ORDER-1];
     FReal W4[nRhs][3][(ORDER-1)*(ORDER-1)];
@@ -750,7 +748,7 @@ inline void FChebInterpolator<ORDER,MatrixKernelClass>::applyP2M(const FPoint& c
         for (unsigned int j=0; j<ORDER; ++j) {
             for (unsigned int k=0; k<ORDER; ++k) {
                 const unsigned int idx = k*ORDER*ORDER + j*ORDER + i;
-                multipoleExpansion[2*idxRhs*nnodes + idx] = (W1[idxRhs] +
+                multipoleExpansion[2*idxRhs*nnodes + idx] += (W1[idxRhs] +
                                                                      FReal(2.) * (F2[0][i] + F2[1][j] + F2[2][k]) +
                                                                      FReal(4.) * (F4[0][j*ORDER+i] + F4[1][k*ORDER+i] + F4[2][k*ORDER+j]) +
                                                                      FReal(8.) *  F8[idx]) / nnodes; // 11 * ORDER*ORDER*ORDER flops

Src/Kernels/Uniform/FUnifInterpolator.hpp

@@ -415,8 +415,6 @@ inline void FUnifInterpolator<ORDER,MatrixKernelClass>::applyP2M(const FPoint& c
                                                                  FReal *const multipoleExpansion,
                                                                  const ContainerClass *const inParticles) const
 {
-  // set all multipole expansions to zero
-  // Should not be set to zero here (TODO remove this line) FBlas::setzero(nRhs*nnodes, multipoleExpansion);
 
   // allocate stuff
   const map_glob_loc map(center, width);