diff --git a/Template-Config.sh b/Template-Config.sh
index 8091e3cb2030930ca59df77a5a042e85c87a5809..49e155bcb3e683dff0a2d8a96a7921f388d41778 100644
--- a/Template-Config.sh
+++ b/Template-Config.sh
@@ -10,6 +10,7 @@
#PERIODIC # enables periodic boundary condistions
#NTYPES=6 # number of particle types
#RANDOMIZE_DOMAINCENTER # shifts the particle distribution randomly each step to reduce correlations of force errors in time
+#RANDOMIZE_DOMAINCENTER_TYPES # can be used to set a zoom region via a particle type which is then never placed across large node boundaries
#LEAN # selects a special 'lean' mode of code operation, which is optimized for aggressive memory saving
#LONG_X_BITS=2 # can be used to reduce periodic box-dimension in x-direction relative to nominal box size
#LONG_Y_BITS=2 # can be used to reduce periodic box-dimension in y-direction relative to nominal box size
diff --git a/documentation/04_config-options.md b/documentation/04_config-options.md
index cf80f934b9f357ae0226c9d69861ae91bd4449b1..0c9bd761861e3dc1d798c72ce93ee38e385515a6 100644
--- a/documentation/04_config-options.md
+++ b/documentation/04_config-options.md
@@ -324,6 +324,18 @@ recommended, and should have only positive effects.
-------
+**RANDOMIZE_DOMAINCENTER_TYPES** = 2
+
+Can be set to select one or several types (this is a bitmask) which
+will then be used to locate the extension of a certain region. When
+the particle set is randomly translated throughout the box, the code
+will then try to avoid intersecting large oct-tree node boundaries
+with this region. When this option is not set explicitely but
+PLACEHIGHRESREGION is active, then this is automatically done
+with a default setting RANDOMIZE_DOMAINCENTER_TYPES=PLACEHIGHRESREGION.
+
+-------
+
**EVALPOTENTIAL**
When this is activated, the code also computes the gravitational
diff --git a/src/data/constants.h b/src/data/constants.h
index 2fc5303aa9552c88ea297548995f86e350e69262..7aa40b3fac9616d2e37ea8130ccbdbe288581f56 100644
--- a/src/data/constants.h
+++ b/src/data/constants.h
@@ -147,6 +147,10 @@
#define HRPMGRID PMGRID
#endif
+#if !defined(RANDOMIZE_DOMAINCENTER_TYPES) && defined(PLACEHIGHRESREGION)
+#define RANDOMIZE_DOMAINCENTER_TYPES PLACEHIGHRESREGION
+#endif
+
#if defined(SUBFIND) && !defined(SELFGRAVITY)
#error "Running SUBFIND without SELFGRAVITY enabled does not make sense."
#endif
diff --git a/src/data/simparticles.h b/src/data/simparticles.h
index 6b4f2279bdbfa4b79baff00af79a2f985d21ce68..5fcf5546c524cc03f22d3be06446c8f7bdf7dfab 100644
--- a/src/data/simparticles.h
+++ b/src/data/simparticles.h
@@ -153,6 +153,9 @@ class simparticles : public intposconvert, public setcomm
MyIntPosType Left[2][3];
MyIntPosType OldMeshSize[2];
MyIntPosType ReferenceIntPos[2][3];
+#endif
+
+#if defined(RANDOMIZE_DOMAINCENTER_TYPES) || defined(PLACEHIGHRESREGION)
MyIntPosType PlacingMask;
MyIntPosType PlacingBlocksize;
#endif
diff --git a/src/domain/domain.h b/src/domain/domain.h
index 58d42041cad5112fb46031cd9dbf4b432bce7279..1ac2308a3876d37aa44baa876d82a6a7f7e2dda1 100644
--- a/src/domain/domain.h
+++ b/src/domain/domain.h
@@ -255,7 +255,7 @@ class domain : public setcomm
return a.targetindex < b.targetindex;
}
-#if defined(PLACEHIGHRESREGION) || defined(RANDOMIZE_DOMAINCENTER)
+#if defined(RANDOMIZE_DOMAINCENTER_TYPES) || defined(RANDOMIZE_DOMAINCENTER)
MyIntPosType domainInnersize;
MyIntPosType domainReferenceIntPos[3];
MySignedIntPosType domainXmintot[3], domainXmaxtot[3];
diff --git a/src/domain/domain_box.cc b/src/domain/domain_box.cc
index 2c1520c11647ad6b52bab7681ebf355a1d7b7ffc..10bc0b008ceb64de12be2089d0deb7f93de79af4 100644
--- a/src/domain/domain_box.cc
+++ b/src/domain/domain_box.cc
@@ -119,13 +119,13 @@ void domain<simparticles>::do_box_wrapping(void)
#ifdef RANDOMIZE_DOMAINCENTER
/* determine new shift vector */
-#if defined(PLACEHIGHRESREGION)
+#if defined(RANDOMIZE_DOMAINCENTER_TYPES) || defined(PLACEHIGHRESREGION)
domain_find_type_extension();
#endif
if(ThisTask == 0)
{
-#if defined(PLACEHIGHRESREGION)
+#if defined(RANDOMIZE_DOMAINCENTER_TYPES) || defined(PLACEHIGHRESREGION)
int count = 0;
#endif
@@ -145,7 +145,7 @@ void domain<simparticles>::do_box_wrapping(void)
Tp->CurrentShiftVector[j] += get_random_number() * pow(2.0, 32);
#endif
-#if defined(PLACEHIGHRESREGION)
+#if defined(RANDOMIZE_DOMAINCENTER_TYPES) || defined(PLACEHIGHRESREGION)
MyIntPosType boxoff = (Tp->CurrentShiftVector[j] & Tp->PlacingMask);
MyIntPosType inboxoff = (Tp->CurrentShiftVector[j] - boxoff) % (Tp->PlacingBlocksize - domainInnersize);
@@ -190,7 +190,7 @@ void domain<simparticles>::do_box_wrapping(void)
#endif
}
-#if defined(PLACEHIGHRESREGION)
+#if defined(RANDOMIZE_DOMAINCENTER_TYPES) || defined(PLACEHIGHRESREGION)
template <typename partset>
int domain<partset>::domain_type_extension_overlap(int j)
@@ -217,7 +217,7 @@ void domain<partset>::domain_find_type_extension(void)
for(int i = 0; i < Tp->NumPart; i++)
{
- if(((1 << Tp->P[i].getType()) & (PLACEHIGHRESREGION)))
+ if(((1 << Tp->P[i].getType()) & (RANDOMIZE_DOMAINCENTER_TYPES)))
{
for(int j = 0; j < 3; j++)
domainReferenceIntPos[j] = Tp->P[i].IntPos[j];
@@ -232,8 +232,8 @@ void domain<partset>::domain_find_type_extension(void)
MPI_Allreduce(MPI_IN_PLACE, have_global, 1, MPI_2INT, MPI_MINLOC, Communicator);
if(have_global[0] >= NTask)
- Terminate("have_global[0]=%d >= NTask=%d: Don't we have any particle? Note: PLACEHIGHRESREGION=%d is a bitmask", have_global[0],
- NTask, PLACEHIGHRESREGION);
+ Terminate("have_global[0]=%d >= NTask=%d: Don't we have any particle? Note: RANDOMIZE_DOMAINCENTER_TYPES=%d is a bitmask",
+ have_global[0], NTask, RANDOMIZE_DOMAINCENTER_TYPES);
MPI_Bcast(domainReferenceIntPos, 3 * sizeof(MyIntPosType), MPI_BYTE, have_global[1], Communicator);
@@ -249,7 +249,7 @@ void domain<partset>::domain_find_type_extension(void)
for(int i = 0; i < Tp->NumPart; i++)
{
- if(((1 << Tp->P[i].getType()) & (PLACEHIGHRESREGION)))
+ if(((1 << Tp->P[i].getType()) & (RANDOMIZE_DOMAINCENTER_TYPES)))
{
MyIntPosType diff[3] = {Tp->P[i].IntPos[0] - domainReferenceIntPos[0], Tp->P[i].IntPos[1] - domainReferenceIntPos[1],
Tp->P[i].IntPos[2] - domainReferenceIntPos[2]};
@@ -280,10 +280,10 @@ void domain<partset>::domain_find_type_extension(void)
if((MyIntPosType)(domainXmaxtot[2] - domainXmintot[2]) > domainInnersize)
domainInnersize = domainXmaxtot[2] - domainXmintot[2];
- domain_printf("DOMAIN: Shrink-wrap region size for PLACEHIGHRESREGION is %g\n", domainInnersize * Tp->FacIntToCoord);
+ domain_printf("DOMAIN: Shrink-wrap region size for RANDOMIZE_DOMAINCENTER_TYPES is %g\n", domainInnersize * Tp->FacIntToCoord);
if(domainInnersize * Tp->FacIntToCoord >= 0.125 * All.BoxSize)
- Terminate("inappropriately big region selection for PLACEHIGHRESREGION");
+ Terminate("inappropriately big region selection for RANDOMIZE_DOMAINCENTER_TYPES");
/* increase the region by at least 1/8 of its size to still allow some randomness in placing the particles within the high-res node
*/