add ephemeral object flag

Used to prevent objects from being stored in save files.

3 files changed, 15 insertions, 1 deletions

diff --git a/editor/inspect-types.cpp b/editor/inspect-types.cpp
index 914c76a4..5668d6b2 100644
--- a/editor/inspect-types.cpp
+++ b/editor/inspect-types.cpp
@@ -62,6 +62,10 @@ struct entity_accessors<object, inspect_intent_t> {
                 [](object& x, Vector2ub value) { x.set_bbox(x.offset, x.bbox_offset, value, x.pass); },
                 [](const object& x) { return x.pass == pass_mode::pass ? st::readonly : st::enabled; },
             },
+            E::type<bool>::field{"ephemeral"_s,
+                [](const object& x) { return x.ephemeral; },
+                [](object& x, bool value) { x.ephemeral = value; },
+            },
         };
     }
 };
diff --git a/serialize/savegame.cpp b/serialize/savegame.cpp
index 620d7457..eea89a03 100644
--- a/serialize/savegame.cpp
+++ b/serialize/savegame.cpp
@@ -490,11 +490,20 @@ ok:
     template<typename F>
     void serialize_objects_(chunk& c, F&& f)
     {
-        f((uint32_t)c.objects().size());
+        uint32_t count = 0;
+        for (const std::shared_ptr<object>& obj : c.objects())
+        {
+            if (obj->ephemeral)
+                continue;
+            count++;
+        }
+        f((uint32_t)count);
 
         for (const std::shared_ptr<object>& obj : c.objects())
         {
             fm_assert(obj != nullptr);
+            if (obj->ephemeral)
+                continue;
             do_visit(object_magic, f); // todo move before all objects
             visit(*obj, f, c.coord());
         }
diff --git a/src/object.hpp b/src/object.hpp
index 10a900d1..2d33885d 100644
--- a/src/object.hpp
+++ b/src/object.hpp
@@ -49,6 +49,7 @@ struct object
     uint16_t delta = 0, frame = 0;
     const rotation r = rotation::N;
     const pass_mode pass = pass_mode::see_through;
+    bool ephemeral : 1 = false;
     //char _pad[4]; // got 4 bytes left
 
     virtual ~object() noexcept;