add 'on_block_tick' event

res/scripts/classes.lua

@@ -161,6 +161,73 @@ local function clean(iterable, checkFun, ...)
     end
 end
 
+local updating_blocks = {}
+local TYPE_REGISTER = 0
+local TYPE_UNREGISTER = 1
+
+block.__perform_ticks = function(delta)
+    for id, entry in pairs(updating_blocks) do
+        entry.timer = entry.timer + delta
+        local steps = math.floor(entry.timer / entry.delta * #entry / 3)
+        if steps == 0 then
+            goto continue
+        end
+        entry.timer = 0.0
+        local event = entry.event
+        for i=1, steps do
+            local x = entry[entry.pointer + 1]
+            local y = entry[entry.pointer + 2]
+            local z = entry[entry.pointer + 3]
+            entry.pointer = (entry.pointer + 3) % #entry
+            events.emit(event, x, y, z)
+        end
+        ::continue::
+    end
+end
+
+block.__process_register_events = function()
+    local register_events = block.__pull_register_events()
+    if not register_events then
+        return
+    end
+    for i=1, #register_events, 4 do
+        local header = register_events[i]
+        local type = bit.band(header, 0xFFFF)
+        local id = bit.rshift(header, 16)
+        local x = register_events[i + 1]
+        local y = register_events[i + 2]
+        local z = register_events[i + 3]
+
+        local list = updating_blocks[id]
+        if type == TYPE_REGISTER then
+            if not list then
+                list = {}
+                list.event = block.name(id) .. ".blocktick"
+                list.delta = 1.0 / (20.0 / (block.properties[id]["tick-interval"] or 1))
+                list.timer = 0.0
+                list.pointer = 0
+                updating_blocks[id] = list
+            end
+            table.insert(list, x)
+            table.insert(list, y)
+            table.insert(list, z)
+        elseif type == TYPE_UNREGISTER then
+            if list then
+                for j=1, #list, 3 do
+                    if list[j] == x and list[j + 1] == y and list[j + 2] == z then
+                        for k=1,3 do
+                            table.remove(list, j)
+                        end
+                        j = j - 3
+                    end
+                end
+            end
+        end
+
+        print(type, id, x, y, z)
+    end
+end
+
 network.__process_events = function()
     local CLIENT_CONNECTED = 1
     local CONNECTED_TO_SERVER = 2

res/scripts/stdlib.lua

@@ -588,6 +588,8 @@ function __process_post_runnables()
     end
 
     network.__process_events()
+    block.__process_register_events()
+    block.__perform_ticks(time.delta())
 end
 
 function time.post_runnable(runnable)

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