4 files changed, 63 insertions, 5 deletions
diff --git a/game/server/world/CMakeLists.txt b/game/server/world/CMakeLists.txt
index e8fd4be..58a2216 100644
--- a/game/server/world/CMakeLists.txt
+++ b/game/server/world/CMakeLists.txt
@@ -2,6 +2,8 @@ target_sources(vserver PRIVATE
     "${CMAKE_CURRENT_LIST_DIR}/inhabited.hh"
     "${CMAKE_CURRENT_LIST_DIR}/overworld.cc"
     "${CMAKE_CURRENT_LIST_DIR}/overworld.hh"
+    "${CMAKE_CURRENT_LIST_DIR}/random_tick.cc"
+    "${CMAKE_CURRENT_LIST_DIR}/random_tick.hh"
     "${CMAKE_CURRENT_LIST_DIR}/universe.cc"
     "${CMAKE_CURRENT_LIST_DIR}/universe.hh"
     "${CMAKE_CURRENT_LIST_DIR}/unloader.cc"
diff --git a/game/server/world/overworld.cc b/game/server/world/overworld.cc
index eb801de..43059d8 100644
--- a/game/server/world/overworld.cc
+++ b/game/server/world/overworld.cc
@@ -4,13 +4,15 @@
 
 #include "core/math/vectors.hh"
 
+#include "shared/world/voxel.hh"
 #include "shared/world/voxel_storage.hh"
 
 #include "shared/coord.hh"
 #include "shared/game_voxels.hh"
 
 // FIXME: load these from a file
-static void compute_tree_feature(unsigned int height, world::Feature& feature, voxel_id log_voxel, voxel_id leaves_voxel)
+static void compute_tree_feature(unsigned int height, world::Feature& feature, const world::Voxel* log_voxel,
+    const world::Voxel* leaves_voxel)
 {
     // Ensure the tree height is too small
     height = math::max<unsigned int>(height, 4U);
@@ -251,12 +253,12 @@ void world::Overworld::generate_terrain(const chunk_pos& cpos, VoxelStorage& vox
         }
 
         if(vpos.y < -variation) {
-            voxels[i] = game_voxels::stone;
+            voxels[i] = game_voxels::stone->get_id();
             continue;
         }
 
         if(is_inside_terrain(vpos)) {
-            voxels[i] = game_voxels::stone;
+            voxels[i] = game_voxels::stone->get_id();
             continue;
         }
     }
@@ -308,10 +310,10 @@ void world::Overworld::generate_surface(const chunk_pos& cpos, VoxelStorage& vox
 
         if(depth < 5U) {
             if(depth == 0U) {
-                voxels[i] = game_voxels::grass;
+                voxels[i] = game_voxels::grass->get_id();
             }
             else {
-                voxels[i] = game_voxels::dirt;
+                voxels[i] = game_voxels::dirt->get_id();
             }
         }
     }
diff --git a/game/server/world/random_tick.cc b/game/server/world/random_tick.cc
new file mode 100644
index 0000000..c5fa47c
--- /dev/null
+++ b/game/server/world/random_tick.cc
@@ -0,0 +1,40 @@
+#include "server/pch.hh"
+
+#include "server/world/random_tick.hh"
+
+#include "core/config/number.hh"
+
+#include "core/io/config_map.hh"
+
+#include "shared/world/chunk.hh"
+#include "shared/world/dimension.hh"
+#include "shared/world/voxel.hh"
+
+#include "shared/coord.hh"
+
+#include "server/globals.hh"
+
+static config::Int random_tick_speed(2, 1, 1000);
+static std::mt19937_64 random_source;
+
+void world::random_tick::init(void)
+{
+    globals::server_config.add_value("world.random_tick_speed", random_tick_speed);
+
+    random_source.seed(std::random_device {}());
+}
+
+void world::random_tick::tick(const chunk_pos& cpos, Chunk* chunk)
+{
+    assert(chunk);
+
+    for(int i = 0; i < random_tick_speed.get_value(); ++i) {
+        auto voxel_index = random_source() % CHUNK_VOLUME;
+        auto lpos = coord::to_local(voxel_index);
+        auto vpos = coord::to_voxel(cpos, lpos);
+
+        if(auto voxel = chunk->get_voxel(lpos)) {
+            voxel->on_tick(chunk->get_dimension(), vpos);
+        }
+    }
+}
diff --git a/game/server/world/random_tick.hh b/game/server/world/random_tick.hh
new file mode 100644
index 0000000..4ef1691
--- /dev/null
+++ b/game/server/world/random_tick.hh
@@ -0,0 +1,14 @@
+#pragma once
+
+#include "shared/types.hh"
+
+namespace world
+{
+class Chunk;
+} // namespace world
+
+namespace world::random_tick
+{
+void init(void);
+void tick(const chunk_pos& cpos, Chunk* chunk);
+} // namespace world::random_tick