update the separation criteria control

Src/Containers/FOctree.hpp

@@ -968,7 +968,7 @@ public:
                 for(int idxY = startY ; idxY <= endY ; ++idxY){
                     for(int idxZ = startZ ; idxZ <= endZ ; ++idxZ){
                         // if we are not on the current cell
-                        if( idxX || idxY || idxZ ){
+                        if(neighSeparation<1 || idxX || idxY || idxZ ){
 
                             const FTreeCoordinate otherParent(parentCell.getX() + idxX,parentCell.getY() + idxY,parentCell.getZ() + idxZ);
                             FTreeCoordinate otherParentInBox(otherParent);

Src/Containers/FTreeCoordinate.hpp

@@ -363,7 +363,7 @@ public:
                     if(!FMath::Between(parentCell.getZ() + idxZ,0,limite)) continue;
 
                     // if we are not on the current cell
-                    if( idxX || idxY || idxZ ){
+                    if(neighSeparation<1 || idxX || idxY || idxZ ){
                         const FTreeCoordinate otherParent(parentCell.getX() + idxX,parentCell.getY() + idxY,parentCell.getZ() + idxZ);
                         const MortonIndex mortonOther = otherParent.getMortonIndex(inLevel-1);
 
@@ -408,7 +408,7 @@ public:
                     if(!FMath::Between(parentCell.getZ() + idxZ,0,limite)) continue;
 
                     // if we are not on the current cell
-                    if( idxX || idxY || idxZ ){
+                    if(neighSeparation<1 || idxX || idxY || idxZ ){
                         const FTreeCoordinate otherParent(parentCell.getX() + idxX,parentCell.getY() + idxY,parentCell.getZ() + idxZ);
                         const MortonIndex mortonOther = otherParent.getMortonIndex(inLevel-1);