Fix T84369: Fluid: Missing cache invalidation when properties on non-domain objects change

The `DEG_OB_COMP_TRANSFORM` and `DEG_OB_COMP_GEOMETRY` relations between
the **Domain** object and the **Flow**, **Effector** and **Force Field** objects
are added in the `updateDepsgraph` callback of the Fluid modifier, more
specifically in `DEG_add_collision_relations`.

The node linked to these components is the `POINT_CACHE` whose assigned
function is `BKE_ptcache_object_reset`.

So include the `eModifierType_Fluid` modifier in outdated cache checks.

Reviewed By: sergey, zeddb

Maniphest Tasks: T84369

Differential Revision: https://developer.blender.org/D15210

1 files changed, 9 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/pointcache.c b/source/blender/blenkernel/intern/pointcache.c
index d7bdfe08ab9..21217a7f9bf 100644
--- a/source/blender/blenkernel/intern/pointcache.c
+++ b/source/blender/blenkernel/intern/pointcache.c
@@ -2980,6 +2980,15 @@ int BKE_ptcache_object_reset(Scene *scene, Object *ob, int mode)
         }
       }
     }
+    if (md->type == eModifierType_Fluid) {
+      FluidModifierData *fmd = (FluidModifierData *)md;
+      FluidDomainSettings *fds = fmd->domain;
+      if ((fmd->type & MOD_FLUID_TYPE_DOMAIN) && fds &&
+          fds->cache_type == FLUID_DOMAIN_CACHE_REPLAY) {
+        BKE_ptcache_id_from_smoke(&pid, ob, fmd);
+        reset |= BKE_ptcache_id_reset(scene, &pid, mode);
+      }
+    }
   }
 
   if (scene->rigidbody_world && (ob->rigidbody_object || ob->rigidbody_constraint)) {