exposed grapite_set_eps_bh in conf

config.cpp

@@ -237,6 +237,7 @@ Config::Config(std::string file_name)
     grapite_mask_file_name = get_parameter<std::string>(dictionary, "grapite_mask_file_name", "grapite.mask");
     etics_dump_coeffs = get_parameter<bool>(dictionary, "etics_dump_coeffs", false);
     grapite_active_search = get_parameter<bool>(dictionary, "grapite_active_search", false);
+    grapite_smbh_star_eps = get_parameter<double>(dictionary, "grapite_smbh_star_eps", -1);
     grapite_dev_exec_threshold = get_parameter<int>(dictionary, "grapite_dev_exec_threshold", 32);
 #endif
 

config.h

@@ -61,6 +61,7 @@ public:
     std::string         grapite_mask_file_name;
     bool                etics_dump_coeffs;
     bool                grapite_active_search;
+    double              grapite_smbh_star_eps;
     int                 grapite_dev_exec_threshold;
 #endif
 

phigrape.conf

@@ -217,6 +217,15 @@ dt_scf =                                0.015625
 # accelerate the calculation in some circumstances [default: false]
 #grapite_active_search =                 true
 
+# Custom softening length for SMBH-star interactions in the hybrid scheme only.
+# This value (can also be zero) is used in the direct gravity calculation
+# between SMBHs (tag=3) and both core (tag=0) and halo (tag=1) stars. If
+# negative, the Plummer softening parameter (`eps`) is used in these
+# interactions. Do not confuse with `live_smbh_custom_eps`, which is the
+# softening length for SMBH-SMBH interactions, and works both in the normal and
+# hybrid schemes. [default: -1]
+#grapite_smbh_star_eps =                 1E-6
+
 # If the number of active particles in a particular bunch is bigger than this
 # threshold, then the execution is on the GPU, otherwise on the CPU. When the
 # active bunch is small, the overhead of calculating the SCF gravity on the GPU

phigrape.cpp

@@ -400,6 +400,8 @@ int main(int argc, char *argv[])
         v[grapite_cep_index] = vdc;
         grapite_update_cep(time_cur, xdc, vdc, zeros, zeros);
     }
+
+    if (config.grapite_smbh_star_eps >= 0) grapite_set_eps_bh(config.grapite_smbh_star_eps);
 #endif
 
     std::vector<double3> a(N), adot(N);