Updated VELOCIraptor interface to include the number of gas particles.

src/velociraptor_interface.c

@@ -152,6 +152,7 @@ void velociraptor_invoke(struct engine *e) {
     struct space *s = e->s;
     struct gpart *gparts = s->gparts;
     const int nr_gparts = s->nr_gparts;
+    const int nr_hydro_parts = s->nr_parts;
     const int nr_cells = s->nr_cells;
     int *cell_node_ids;
     
@@ -177,9 +178,9 @@ void velociraptor_invoke(struct engine *e) {
         snprintf(outputFileName, FILENAME_BUFFER_SIZE, "%s_%04e.VELOCIraptor", e->stfBaseName,
              e->time);
     }
-   
-    InvokeVelociraptor(nr_gparts, gparts, cell_node_ids, outputFileName);
-    
+
+    InvokeVelociraptor(nr_gparts, nr_hydro_parts, gparts, cell_node_ids, outputFileName);
+
     /* Free cell node ids after VELOCIraptor has copied them. */
     free(cell_node_ids);
 }

src/velociraptor_interface.h

@@ -69,7 +69,7 @@ struct siminfo {
 
 /* VELOCIraptor interface. */
 void InitVelociraptor(char* config_name, char* output_name, struct cosmoinfo cosmo_info, struct unitinfo unit_info, struct siminfo sim_info);
-void InvokeVelociraptor(const int num_gravity_parts, struct gpart *gravity_parts, const int *cell_node_ids, char* output_name);
+void InvokeVelociraptor(const int num_gravity_parts, const int num_hydro_parts, struct gpart *gravity_parts, const int *cell_node_ids, char* output_name);
 
 /* VELOCIraptor wrapper functions. */
 void velociraptor_init(struct engine *e);