add 'on_block_tick' event

src/logic/scripting/lua/libs/libblock.cpp

@@ -707,6 +707,25 @@ static int l_has_tag(lua::State* L) {
     return 0;
 }
 
+static int l_pull_register_events(lua::State* L) {
+    auto events = blocks_agent::pull_register_events();
+    if (events.empty())
+        return 0;
+
+    lua::createtable(L, events.size() * 4, 0);
+    for (int i = 0; i < events.size(); i++) {
+        const auto& event = events[i];
+        lua::pushinteger(L, static_cast<int>(event.type) | event.id << 16);
+        lua::rawseti(L, i * 4 + 1);
+
+        for (int j = 0; j < 3; j++) {
+            lua::pushinteger(L, event.coord[j]);
+            lua::rawseti(L, i * 4 + j + 2);
+        }
+    }
+    return 1;
+}
+
 const luaL_Reg blocklib[] = {
     {"index", lua::wrap<l_index>},
     {"name", lua::wrap<l_get_def>},
@@ -747,5 +766,6 @@ const luaL_Reg blocklib[] = {
     {"set_field", lua::wrap<l_set_field>},
     {"reload_script", lua::wrap<l_reload_script>},
     {"has_tag", lua::wrap<l_has_tag>},
+    {"__pull_register_events", lua::wrap<l_pull_register_events>},
     {NULL, NULL}
 };

src/logic/scripting/scripting.cpp

@@ -24,6 +24,7 @@
 #include "util/timeutil.hpp"
 #include "voxels/Block.hpp"
 #include "voxels/Chunk.hpp"
+#include "voxels/blocks_agent.hpp"
 #include "world/Level.hpp"
 #include "world/World.hpp"
 #include "interfaces/Process.hpp"
@@ -464,6 +465,7 @@ void scripting::on_chunk_present(const Chunk& chunk, bool loaded) {
             );
         }
     }
+    blocks_agent::on_chunk_present(*content->getIndices(), chunk);
 }
 
 void scripting::on_chunk_remove(const Chunk& chunk) {
@@ -478,6 +480,7 @@ void scripting::on_chunk_remove(const Chunk& chunk) {
             );
         }
     }
+    blocks_agent::on_chunk_remove(*content->getIndices(), chunk);
 }
 
 void scripting::on_inventory_open(const Player* player, const Inventory& inventory) {
@@ -648,6 +651,8 @@ void scripting::load_content_script(
         register_event(env, "on_replaced", prefix + ".replaced");
     funcsset.oninteract =
         register_event(env, "on_interact", prefix + ".interact");
+    funcsset.onblocktick =
+        register_event(env, "on_block_tick", prefix + ".blocktick");
     funcsset.onblockstick =
         register_event(env, "on_blocks_tick", prefix + ".blockstick");
 }

src/voxels/Block.hpp

@@ -48,6 +48,7 @@ struct BlockFuncsSet {
     bool onreplaced : 1;
     bool oninteract : 1;
     bool randupdate : 1;
+    bool onblocktick : 1;
     bool onblockstick : 1;
 };
 

src/voxels/blocks_agent.cpp

@@ -6,6 +6,49 @@
 
 using namespace blocks_agent;
 
+static std::vector<BlockRegisterEvent> block_register_events {};
+
+std::vector<BlockRegisterEvent> blocks_agent::pull_register_events() {
+    auto events = block_register_events;
+    block_register_events.clear();
+    return events;
+}
+
+static void on_chunk_register_event(
+    const ContentIndices& indices,
+    const Chunk& chunk,
+    BlockRegisterEvent::Type type
+) {
+    for (int i = 0; i < CHUNK_VOL; i++) {
+        const auto& def =
+            indices.blocks.require(chunk.voxels[i].id);
+        if (def.rt.funcsset.onblocktick) {
+            int x = i % CHUNK_W + chunk.x * CHUNK_W;
+            int z = (i / CHUNK_W) % CHUNK_D + chunk.z * CHUNK_D;
+            int y = (i / CHUNK_W / CHUNK_D);
+            block_register_events.push_back(BlockRegisterEvent {
+                type, def.rt.id, {x, y, z}
+            });
+        }
+    }
+}
+
+void blocks_agent::on_chunk_present(
+    const ContentIndices& indices, const Chunk& chunk
+) {
+    on_chunk_register_event(
+        indices, chunk, BlockRegisterEvent::Type::REGISTER_UPDATING
+    );
+}
+
+void blocks_agent::on_chunk_remove(
+    const ContentIndices& indices, const Chunk& chunk
+) {
+    on_chunk_register_event(
+        indices, chunk, BlockRegisterEvent::Type::UNREGISTER_UPDATING
+    );
+}
+
 template <class Storage>
 static void mark_neighboirs_modified(
     Storage& chunks, int32_t cx, int32_t cz, int32_t lx, int32_t lz
@@ -58,6 +101,11 @@ static void finalize_block(
             chunk.flags.blocksData = true;
         }
     }
+    if (def.rt.funcsset.onblocktick) {
+        block_register_events.push_back(BlockRegisterEvent {
+            BlockRegisterEvent::Type::UNREGISTER_UPDATING, def.rt.id, {x, y, z}
+        });
+    }
 }
 
 template <class Storage>
@@ -82,6 +130,12 @@ static void initialize_block(
 
     refresh_chunk_heights(chunk, id == BLOCK_AIR, y);
     mark_neighboirs_modified(chunks, cx, cz, lx, lz);
+
+    if (def.rt.funcsset.onblocktick) {
+        block_register_events.push_back(BlockRegisterEvent {
+            BlockRegisterEvent::Type::REGISTER_UPDATING, def.rt.id, {x, y, z}
+        });
+    }
 }
 
 template <class Storage>

src/voxels/blocks_agent.hpp

@@ -24,6 +24,21 @@ struct AABB;
 
 namespace blocks_agent {
 
+struct BlockRegisterEvent {
+    enum class Type : uint16_t {
+        REGISTER_UPDATING,
+        UNREGISTER_UPDATING,
+    };
+    Type type;
+    blockid_t id;
+    glm::ivec3 coord;
+};
+
+std::vector<BlockRegisterEvent> pull_register_events();
+
+void on_chunk_present(const ContentIndices& indices, const Chunk& chunk);
+void on_chunk_remove(const ContentIndices& indices, const Chunk& chunk);
+
 /// @brief Get specified chunk.
 /// @tparam Storage 
 /// @param chunks