And OK for the MINIMAL_SPH

src/const.h

@@ -56,8 +56,8 @@
 
 /* SPH variant to use */
 //#define MINIMAL_SPH
-//#define GADGET2_SPH
-#define DEFAULT_SPH
+#define GADGET2_SPH
+//#define DEFAULT_SPH
 
 /* External potential properties */
 #define EXTERNAL_POTENTIAL_POINTMASS

src/hydro/Minimal/hydro.h

@@ -246,3 +246,39 @@ __attribute__((always_inline)) INLINE static float hydro_get_internal_energy(
 
   return p->u;
 }
+
+/**
+ * @brief Returns the pressure of a particle
+ *
+ * @param p The particle of interest
+ * @param dt Time since the last kick
+ */
+__attribute__((always_inline)) INLINE static float hydro_get_pressure(
+    const struct part *restrict p, float dt) {
+
+  return p->u * p->rho * hydro_gamma_minus_one;
+}
+
+/**
+ * @brief Returns the entropy of a particle
+ *
+ * @param p The particle of interest
+ * @param dt Time since the last kick
+ */
+__attribute__((always_inline)) INLINE static float hydro_get_entropy(
+    const struct part *restrict p, float dt) {
+
+  return hydro_gamma_minus_one * p->u * pow_minus_gamma_minus_one(p->rho);
+}
+
+/**
+ * @brief Returns the sound speed of a particle
+ *
+ * @param p The particle of interest
+ * @param dt Time since the last kick
+ */
+__attribute__((always_inline)) INLINE static float hydro_get_soundspeed(
+    const struct part *restrict p, float dt) {
+
+  return sqrt(p->u * hydro_gamma * hydro_gamma_minus_one);
+}

tests/test125cells.c

@@ -97,6 +97,8 @@ void set_energy_state(struct part *part, enum pressure_field press, float size,
   part->entropy = pressure / pow_gamma(density);
 #elif defined(DEFAULT_SPH)
   part->u = pressure / (hydro_gamma_minus_one * density);
+#elif defined(MINIMAL_SPH)
+  part->u = pressure / (hydro_gamma_minus_one * density);
 #else
   error("Need to define pressure here !");
 #endif
@@ -298,7 +300,12 @@ void dump_particle_fields(char *fileName, struct cell *main_cell,
             main_cell->parts[pid].x[1], main_cell->parts[pid].x[2],
             main_cell->parts[pid].v[0], main_cell->parts[pid].v[1],
             main_cell->parts[pid].v[2], main_cell->parts[pid].h,
-            main_cell->parts[pid].rho, main_cell->parts[pid].density.div_v,
+            main_cell->parts[pid].rho,
+#ifdef MINIMAL_SPH
+	    0.f,
+#else
+	    main_cell->parts[pid].density.div_v,
+#endif	    
             hydro_get_entropy(&main_cell->parts[pid], 0.f),
             hydro_get_internal_energy(&main_cell->parts[pid], 0.f),
             hydro_get_pressure(&main_cell->parts[pid], 0.f),
@@ -310,6 +317,8 @@ void dump_particle_fields(char *fileName, struct cell *main_cell,
             main_cell->parts[pid].entropy_dt, 0.f
 #elif defined(DEFAULT_SPH)
             0.f, main_cell->parts[pid].force.u_dt
+#elif defined(MINIMAL_SPH)
+            0.f, main_cell->parts[pid].u_dt
 #else
             0.f, 0.f
 #endif

tests/testNonSymInt.c

@@ -78,8 +78,14 @@ void dump_indv_particle_fields(char *fileName, struct part *p) {
           "%6llu %10f %10f %10f %10f %10f %10f %13e %13e %13e %13e %13e "
           "%13e %13e %13e\n",
           p->id, p->x[0], p->x[1], p->x[2], p->v[0], p->v[1], p->v[2], p->rho,
-          p->rho_dh, p->density.wcount, p->density.wcount_dh, p->density.div_v,
-          p->density.rot_v[0], p->density.rot_v[1], p->density.rot_v[2]);
+          p->rho_dh, p->density.wcount, p->density.wcount_dh,
+#ifdef MINIMAL_SPH
+	  0.f, 0.f, 0.f, 0.f
+#else
+	  p->density.div_v,
+          p->density.rot_v[0], p->density.rot_v[1], p->density.rot_v[2]
+#endif
+	  );
   fclose(file);
 }
 

tests/testSymInt.c

@@ -75,8 +75,14 @@ void dump_indv_particle_fields(char *fileName, struct part *p) {
           "%6llu %10f %10f %10f %10f %10f %10f %13e %13e %13e %13e %13e "
           "%13e %13e %13e\n",
           p->id, p->x[0], p->x[1], p->x[2], p->v[0], p->v[1], p->v[2], p->rho,
-          p->rho_dh, p->density.wcount, p->density.wcount_dh, p->density.div_v,
-          p->density.rot_v[0], p->density.rot_v[1], p->density.rot_v[2]);
+          p->rho_dh, p->density.wcount, p->density.wcount_dh,
+#ifdef MINIMAL_SPH
+	  0.f, 0.f, 0.f, 0.f
+#else
+	  p->density.div_v,
+          p->density.rot_v[0], p->density.rot_v[1], p->density.rot_v[2]
+#endif
+	  );
   fclose(file);
 }