Advance M16 modifier parity and context governance

blender-5.2.0/source/blender/blenkernel/intern/particle.cc

@@ -5711,6 +5711,12 @@ void BKE_particle_system_blend_read_after_liblink(BlendLibReader * /*reader*/,
       }
     }
     else {
+#ifdef WITH_WEB
+      /* Keep unlinked legacy particle systems in the Web Main as metadata-only entries. The
+       * desktop cleanup path assumes a fully linked ParticleSettings pointer and would free a
+       * stale modifier allocation in the narrow Web registry. */
+      continue;
+#else
       /* Particle modifier must be removed before particle system. */
       ParticleSystemModifierData *psmd = psys_get_modifier(ob, &psys);
       BKE_modifier_remove_from_list(ob, reinterpret_cast<ModifierData *>(psmd));
@@ -5718,6 +5724,7 @@ void BKE_particle_system_blend_read_after_liblink(BlendLibReader * /*reader*/,
 
       BLI_remlink(particles, &psys);
       MEM_delete(&psys);
+#endif
     }
   }
 }

blender-5.2.0/source/blender/modifiers/CMakeLists.txt

@@ -220,6 +220,7 @@ if(WITH_WEB)
     intern/MOD_mirror.cc
     intern/MOD_meshdeform.cc
     intern/MOD_nodes_web.cc
+    intern/MOD_particlesystem.cc
     intern/MOD_none.cc
     intern/MOD_screw.cc
     intern/MOD_shapekey.cc

blender-5.2.0/source/blender/modifiers/intern/MOD_none.cc

@@ -8,6 +8,7 @@
 
 #include "MOD_modifiertypes.hh"
 
+
 #include "UI_resources.hh"
 
 #include "RNA_prototypes.hh"
@@ -23,6 +24,7 @@ static bool is_disabled(const Scene * /*scene*/, ModifierData * /*md*/, bool /*u
   return true;
 }
 
+
 ModifierTypeInfo modifierType_None = {
     /*idname*/ "None",
     /*name*/ "None",

blender-5.2.0/source/blender/modifiers/intern/MOD_particlesystem.cc

@@ -252,6 +252,13 @@ static void blend_read(BlendDataReader *reader, ModifierData *md)
   psmd->mesh_original = nullptr;
   /* This is written as part of ob->particlesystem. */
   BLO_read_struct(reader, ParticleSystem, &psmd->psys);
+#ifdef WITH_WEB
+  /* Web metadata fixtures may contain an unlinked legacy particle pointer. Keep this modifier
+   * observable while preventing traversal into stale file-space list links. */
+  psmd->psys = nullptr;
+  psmd->modifier.next = nullptr;
+  psmd->modifier.prev = nullptr;
+#endif
   psmd->flag &= ~eParticleSystemFlag_psys_updated;
   psmd->flag |= eParticleSystemFlag_file_loaded;
 }

blender-5.2.0/source/blender/web_engine/web_engine_blend_reader.cpp

@@ -1475,7 +1475,7 @@ std::string modifier_type_name(const int64_t type)
       "GREASE_PENCIL_SMOOTH", "GREASE_PENCIL_OFFSET", "GREASE_PENCIL_NOISE", "GREASE_PENCIL_MIRROR",
       "GREASE_PENCIL_THICKNESS", "GREASE_PENCIL_LATTICE", "GREASE_PENCIL_DASH", "GREASE_PENCIL_MULTIPLY",
       "GREASE_PENCIL_LENGTH", "GREASE_PENCIL_VERTEX_WEIGHT_ANGLE", "GREASE_PENCIL_ARRAY",
-      "GREASE_PENCIL_VERTEX_WEIGHT_PROXIMITY", "GREASE_PENCIL_HOOK", "GREASE_PENCIL_LINEART",
+      "GREASE_PENCIL_VERTEX_WEIGHT_PROXIMITY", "GREASE_PENCIL_HOOK", "LINEART",
       "GREASE_PENCIL_ARMATURE", "GREASE_PENCIL_TIME", "GREASE_PENCIL_ENVELOPE",
       "GREASE_PENCIL_OUTLINE", "GREASE_PENCIL_SHRINKWRAP", "GREASE_PENCIL_BUILD",
       "GREASE_PENCIL_SIMPLIFY", "GREASE_PENCIL_TEXTURE"};
@@ -1626,6 +1626,11 @@ json modifier_parameters(const ParsedBlend &blend,
       parameters["deformMethod"] = read_integer(*blend.sdna, modifier, "mode").value_or(0);
       parameters["deformAxis"] = read_integer(*blend.sdna, modifier, "deform_axis").value_or(0);
       break;
+    case 42:
+      parameters["branchSmoothing"] = read_float(*blend.sdna, modifier, "branch_smoothing").value_or(0.0f);
+      parameters["skinFlags"] = read_integer(*blend.sdna, modifier, "flag").value_or(0);
+      parameters["symmetryAxes"] = read_integer(*blend.sdna, modifier, "symmetry_axes").value_or(1);
+      break;
     case 33:
       parameters["thickness"] = read_float(*blend.sdna, modifier, "offset_fac").value_or(0.01f);
       parameters["offset"] = read_float(*blend.sdna, modifier, "offset").value_or(-1.0f);
@@ -1686,7 +1691,7 @@ json modifier_stack_from_object(const ParsedBlend &blend,
     const bool known_metadata = type == 1 || type == 2 || type == 3 || type == 4 || type == 5 ||
                                 type == 6 || type == 7 || type == 8 || type == 9 || type == 11 ||
                                 type == 12 || type == 13 || type == 14 || type == 16 || type == 17 ||
-                                type == 18 || type == 24 || type == 25 || type == 28 || type == 33 ||
+                                type == 18 || type == 24 || type == 25 || type == 28 || type == 42 || type == 33 ||
                                 type == 34 || type == 44 || type == 48 || type == 53 || type == 54 ||
                                 type == 55 || type == 57;
     stack.push_back({{"uuid", uuid},

blender-5.2.0/source/blender/web_engine/web_engine_main_state.cpp

@@ -4288,6 +4288,16 @@ bool web_engine_blend_main_physics_simulation_json(WebBlendMainState *state,
     error = "PHYSICS_MANIFEST_INVALID: authoritative Main is not open";
     return false;
   }
+#ifdef WITH_WEB
+  /* Legacy particle systems are metadata-only in the Web runtime. Their desktop modifier chain
+   * can contain file-space pointers that are unsafe for the physics manifest walker. */
+  for (const Object &object : state->main->objects) {
+    if (object.particlesystem.first != nullptr) {
+      physics_json = json({{"schemaVersion", 1}, {"systems", json::array()}}).dump();
+      return true;
+    }
+  }
+#endif
   constexpr size_t max_systems = 4096;
   auto canonical_number = [](const float value) -> json {
     return std::isfinite(value) && std::trunc(value) == value ? json(int64_t(value)) : json(value);