Fix: Fluid/Cloth/DynamicPaint: Only share pointcaches in CoW case.

Particle copying code was already properly sharing pointcache between
orig data and its copy only when `LIB_ID_COPY_SET_COPIED_ON_WRITE` is
set, do the same for the other point cache users.

Using `LIB_ID_CREATE_NO_MAIN` here is waaaaaaay to much wide scope for
such a dangerous/advanced behavior, that kind of things has to be
strictly restricted in scope.

3 files changed, 3 insertions, 3 deletions

diff --git a/source/blender/blenkernel/intern/dynamicpaint.c b/source/blender/blenkernel/intern/dynamicpaint.c
index 2bad47f2ed1..9083c507160 100644
--- a/source/blender/blenkernel/intern/dynamicpaint.c
+++ b/source/blender/blenkernel/intern/dynamicpaint.c
@@ -1231,7 +1231,7 @@ void dynamicPaint_Modifier_copy(const struct DynamicPaintModifierData *pmd,
     /* copy existing surfaces */
     for (surface = pmd->canvas->surfaces.first; surface; surface = surface->next) {
       DynamicPaintSurface *t_surface = dynamicPaint_createNewSurface(tpmd->canvas, NULL);
-      if (flag & LIB_ID_CREATE_NO_MAIN) {
+      if (flag & LIB_ID_COPY_SET_COPIED_ON_WRITE) {
         /* TODO(sergey): Consider passing some tips to the surface
          * creation to avoid this allocate-and-free cache behavior. */
         BKE_ptcache_free_list(&t_surface->ptcaches);
diff --git a/source/blender/blenkernel/intern/fluid.c b/source/blender/blenkernel/intern/fluid.c
index 1324b37f39c..e272b71acb8 100644
--- a/source/blender/blenkernel/intern/fluid.c
+++ b/source/blender/blenkernel/intern/fluid.c
@@ -5094,7 +5094,7 @@ void BKE_fluid_modifier_copy(const struct FluidModifierData *fmd,
 
     /* pointcache options */
     BKE_ptcache_free_list(&(tfds->ptcaches[0]));
-    if (flag & LIB_ID_CREATE_NO_MAIN) {
+    if (flag & LIB_ID_COPY_SET_COPIED_ON_WRITE) {
       /* Share the cache with the original object's modifier. */
       tfmd->modifier.flag |= eModifierFlag_SharedCaches;
       tfds->point_cache[0] = fds->point_cache[0];
diff --git a/source/blender/modifiers/intern/MOD_cloth.c b/source/blender/modifiers/intern/MOD_cloth.c
index fa2f70e1a9c..cf0658d4b39 100644
--- a/source/blender/modifiers/intern/MOD_cloth.c
+++ b/source/blender/modifiers/intern/MOD_cloth.c
@@ -194,7 +194,7 @@ static void copyData(const ModifierData *md, ModifierData *target, const int fla
   }
 
   BKE_ptcache_free_list(&tclmd->ptcaches);
-  if (flag & LIB_ID_CREATE_NO_MAIN) {
+  if (flag & LIB_ID_COPY_SET_COPIED_ON_WRITE) {
     /* Share the cache with the original object's modifier. */
     tclmd->modifier.flag |= eModifierFlag_SharedCaches;
     tclmd->ptcaches = clmd->ptcaches;