scripts/startup/bl_ui/properties_physics_geometry_nodes.py

@@ -39,6 +39,11 @@ class PHYSICS_PT_geometry_nodes(Panel):
         row.operator("object.simulation_nodes_cache_bake", text=bake_text).selected = True
         row.operator("object.simulation_nodes_cache_delete", text="", icon='TRASH').selected = True
 
+        layout.use_property_split = True
+        layout.use_property_decorate = False
+        ob = context.object
+        layout.prop(ob, "use_simulation_cache", text="Cache")
+
 
 classes = (
     PHYSICS_PT_geometry_nodes,

source/blender/blenkernel/BKE_blender_version.h

@@ -31,7 +31,7 @@ extern "C" {
  * version. Older Blender versions will test this and show a warning if the file
  * was written with too new a version. */
 #define BLENDER_FILE_MIN_VERSION 305
-#define BLENDER_FILE_MIN_SUBVERSION 8
+#define BLENDER_FILE_MIN_SUBVERSION 9
 
 /** User readable version string. */
 const char *BKE_blender_version_string(void);

source/blender/blenkernel/BKE_simulation_state.hh

@@ -181,6 +181,7 @@ class ModifierSimulationCache {
   }
 
   void reset();
+  void clear_prev_states();
 };
 
 }  // namespace blender::bke::sim

source/blender/blenkernel/intern/simulation_state.cc

@@ -202,6 +202,15 @@ void ModifierSimulationState::ensure_bake_loaded() const
   bake_loaded_ = true;
 }
 
+void ModifierSimulationCache::clear_prev_states()
+{
+  std::lock_guard lock(states_at_frames_mutex_);
+  std::unique_ptr<ModifierSimulationStateAtFrame> temp = std::move(states_at_frames_.last());
+  states_at_frames_.clear_and_shrink();
+  bdata_sharing_.reset();
+  states_at_frames_.append(std::move(temp));
+}
+
 void ModifierSimulationCache::reset()
 {
   std::lock_guard lock(states_at_frames_mutex_);

source/blender/blenloader/intern/versioning_280.c

@@ -3472,7 +3472,7 @@ void blo_do_versions_280(FileData *fd, Library *UNUSED(lib), Main *bmain)
     }
 
     for (Object *ob = bmain->objects.first; ob; ob = ob->id.next) {
-      ob->flag &= ~(OB_FLAG_UNUSED_11 | OB_FLAG_UNUSED_12);
+      ob->flag &= ~(OB_FLAG_USE_SIMULATION_CACHE | OB_FLAG_UNUSED_12);
       ob->transflag &= ~(OB_TRANSFORM_ADJUST_ROOT_PARENT_FOR_VIEW_LOCK | OB_TRANSFLAG_UNUSED_1);
       ob->shapeflag &= ~OB_SHAPE_FLAG_UNUSED_1;
     }

source/blender/blenloader/intern/versioning_300.cc

@@ -4351,6 +4351,13 @@ void blo_do_versions_300(FileData *fd, Library * /*lib*/, Main *bmain)
       }
     }
   }
+
+  if (!MAIN_VERSION_ATLEAST(bmain, 306, 8)) {
+    LISTBASE_FOREACH (Object *, ob, &bmain->objects) {
+      ob->flag |= OB_FLAG_USE_SIMULATION_CACHE;
+    }
+  }
+
   /**
    * Versioning code until next subversion bump goes here.
    *

source/blender/makesdna/DNA_object_defaults.h

@@ -37,6 +37,7 @@
     .drotAngle = 0, \
     .quat = _DNA_DEFAULT_UNIT_QT, \
     .dquat = _DNA_DEFAULT_UNIT_QT, \
+    .flag = OB_FLAG_USE_SIMULATION_CACHE, \
     .protectflag = OB_LOCK_ROT4D, \
  \
     .dt = OB_TEXTURE, \

source/blender/makesdna/DNA_object_types.h

@@ -720,8 +720,8 @@ enum {
 
 #define OB_FROMDUPLI (1 << 9)
 #define OB_DONE (1 << 10) /* unknown state, clear before use */
+#define OB_FLAG_USE_SIMULATION_CACHE (1 << 11)
 #ifdef DNA_DEPRECATED_ALLOW
-#  define OB_FLAG_UNUSED_11 (1 << 11) /* cleared */
 #  define OB_FLAG_UNUSED_12 (1 << 12) /* cleared */
 #endif
 

source/blender/makesrna/intern/rna_object.c

@@ -3679,6 +3679,12 @@ static void rna_def_object(BlenderRNA *brna)
   RNA_def_property_struct_type(prop, "RigidBodyConstraint");
   RNA_def_property_ui_text(prop, "Rigid Body Constraint", "Constraint constraining rigid bodies");
 
+  prop = RNA_def_property(srna, "use_simulation_cache", PROP_BOOLEAN, PROP_NONE);
+  RNA_def_property_boolean_sdna(prop, NULL, "flag", OB_FLAG_USE_SIMULATION_CACHE);
+  RNA_def_property_ui_text(
+      prop, "Use Simulation Cache", "Cache all frames during simulation nodes playback");
+  RNA_def_property_update(prop, NC_OBJECT | ND_DRAW, NULL);
+
   rna_def_object_visibility(srna);
 
   /* instancing */

source/blender/modifiers/intern/MOD_nodes.cc

@@ -1351,6 +1351,14 @@ static GeometrySet compute_geometry(const bNodeTree &btree,
     nmd_orig->runtime_eval_log = eval_log.release();
   }
 
+  if (DEG_is_active(ctx->depsgraph)) {
+    /* When caching is turned off, remove all states except the last which was just created in this
+     * evaluation. Check if active status to avoid changing original data in other depsgraphs. */
+    if (!(ctx->object->flag & OB_FLAG_USE_SIMULATION_CACHE)) {
+      nmd_orig->simulation_cache->clear_prev_states();
+    }
+  }
+
   return output_geometry_set;
 }