diff --git a/data/mods/default/init.lua b/data/mods/default/init.lua
index 537f62e31d626e948b9e7ce3d4617c58fb4a0ee3..c59c34fc79dd4a44715f73cd00f9b5b0b8afd794 100644
--- a/data/mods/default/init.lua
+++ b/data/mods/default/init.lua
@@ -1296,36 +1296,6 @@ end
register_falling_node("sand", "sand.png")
register_falling_node("gravel", "gravel.png")
---[[
-minetest.register_entity("falling_sand", {
- -- Definition
- collisionbox = {-0.5,-0.5,-0.5, 0.5,0.5,0.5},
- visual = "cube",
- textures = {"sand.png","sand.png","sand.png","sand.png","sand.png","sand.png"},
- -- State
- fallspeed = 0,
- -- Methods
- on_step = function(self, dtime)
- -- Apply gravity
- self.fallspeed = self.fallspeed + dtime * 5
- fp = self.object:getpos()
- fp.y = fp.y - self.fallspeed * dtime
- self.object:moveto(fp)
- -- Turn to actual sand when collides to ground or just move
- bcp = {x=fp.x, y=fp.y-0.5, z=fp.z} -- Position of bottom center point
- bcn = minetest.env:get_node(bcp)
- if bcn.name ~= "air" then
- -- Turn to a sand node
- np = {x=bcp.x, y=bcp.y+1, z=bcp.z}
- minetest.env:add_node(np, {name="sand"})
- self.object:remove()
- else
- -- Do nothing
- end
- end
-})
---]]
-
--
-- Global callbacks
--
@@ -1389,6 +1359,17 @@ minetest.register_on_chat_message(function(name, message)
end
end)
+minetest.register_abm({
+ nodenames = {"TNT"},
+ interval = 10.0,
+ chance = 1,
+ action = function(pos, node, active_object_count, active_object_count_wider)
+ print("TNT ABM action")
+ pos.y = pos.y + 1
+ minetest.env:add_node(pos, {name="papyrus"})
+ end,
+})
+
--
-- Done, print some random stuff
--
diff --git a/src/scriptapi.cpp b/src/scriptapi.cpp
index 4a162a9b93b373ac8fb06920b3e2a61286038ffe..3294ac57f4b24d9357fbc6e0a4810f6caf4b83bf 100644
--- a/src/scriptapi.cpp
+++ b/src/scriptapi.cpp
@@ -498,6 +498,105 @@ static int l_register_entity(lua_State *L)
return 0; /* number of results */
}
+class LuaABM : public ActiveBlockModifier
+{
+private:
+ lua_State *m_lua;
+ int m_id;
+
+ std::set<std::string> m_trigger_contents;
+ float m_trigger_interval;
+ u32 m_trigger_chance;
+public:
+ LuaABM(lua_State *L, int id,
+ const std::set<std::string> &trigger_contents,
+ float trigger_interval, u32 trigger_chance):
+ m_lua(L),
+ m_id(id),
+ m_trigger_contents(trigger_contents),
+ m_trigger_interval(trigger_interval),
+ m_trigger_chance(trigger_chance)
+ {
+ }
+ virtual std::set<std::string> getTriggerContents()
+ {
+ return m_trigger_contents;
+ }
+ virtual float getTriggerInterval()
+ {
+ return m_trigger_interval;
+ }
+ virtual u32 getTriggerChance()
+ {
+ return m_trigger_chance;
+ }
+ virtual void trigger(ServerEnvironment *env, v3s16 p, MapNode n,
+ u32 active_object_count, u32 active_object_count_wider)
+ {
+ lua_State *L = m_lua;
+
+ realitycheck(L);
+ assert(lua_checkstack(L, 20));
+ StackUnroller stack_unroller(L);
+
+ // Get minetest.registered_abms
+ lua_getglobal(L, "minetest");
+ lua_getfield(L, -1, "registered_abms");
+ luaL_checktype(L, -1, LUA_TTABLE);
+ int registered_abms = lua_gettop(L);
+
+ // Get minetest.registered_abms[m_id]
+ lua_pushnumber(L, m_id);
+ lua_gettable(L, registered_abms);
+ if(lua_isnil(L, -1))
+ assert(0);
+
+ // Call action
+ luaL_checktype(L, -1, LUA_TTABLE);
+ lua_getfield(L, -1, "action");
+ luaL_checktype(L, -1, LUA_TFUNCTION);
+ pushpos(L, p);
+ pushnode(L, n, env->getGameDef()->ndef());
+ lua_pushnumber(L, active_object_count);
+ lua_pushnumber(L, active_object_count_wider);
+ if(lua_pcall(L, 4, 0, 0))
+ script_error(L, "error: %s\n", lua_tostring(L, -1));
+ }
+};
+
+// register_abm({...})
+static int l_register_abm(lua_State *L)
+{
+ infostream<<"register_abm"<<std::endl;
+ luaL_checktype(L, 1, LUA_TTABLE);
+
+ // Get minetest.registered_abms
+ lua_getglobal(L, "minetest");
+ lua_getfield(L, -1, "registered_abms");
+ luaL_checktype(L, -1, LUA_TTABLE);
+ int registered_abms = lua_gettop(L);
+
+ int id = 1;
+ // Find free id
+ for(;;){
+ lua_pushnumber(L, id);
+ lua_gettable(L, registered_abms);
+ if(lua_isnil(L, -1))
+ break;
+ lua_pop(L, 1);
+ }
+ lua_pop(L, 1);
+
+ infostream<<"register_abm: id="<<id<<std::endl;
+
+ // registered_abms[id] = spec
+ lua_pushnumber(L, id);
+ lua_pushvalue(L, 1);
+ lua_settable(L, registered_abms);
+
+ return 0; /* number of results */
+}
+
// register_tool(name, {lots of stuff})
static int l_register_tool(lua_State *L)
{
@@ -894,6 +993,7 @@ static const struct luaL_Reg minetest_f [] = {
{"register_tool", l_register_tool},
{"register_node", l_register_node},
{"register_craft", l_register_craft},
+ {"register_abm", l_register_abm},
{"setting_get", l_setting_get},
{"setting_getbool", l_setting_getbool},
{"chat_send_all", l_chat_send_all},
@@ -1420,6 +1520,8 @@ void scriptapi_export(lua_State *L, Server *server)
lua_setfield(L, -2, "registered_nodes");
lua_newtable(L);
lua_setfield(L, -2, "registered_entities");
+ lua_newtable(L);
+ lua_setfield(L, -2, "registered_abms");
lua_newtable(L);
lua_setfield(L, -2, "object_refs");
@@ -1458,6 +1560,58 @@ void scriptapi_add_environment(lua_State *L, ServerEnvironment *env)
luaL_checktype(L, -1, LUA_TTABLE);
lua_pushvalue(L, envref);
lua_setfield(L, -2, "env");
+
+ // Store environment as light userdata in registry
+ lua_pushlightuserdata(L, env);
+ lua_setfield(L, LUA_REGISTRYINDEX, "minetest_env");
+
+ /* Add ActiveBlockModifiers to environment */
+
+ // Get minetest.registered_abms
+ lua_getglobal(L, "minetest");
+ lua_getfield(L, -1, "registered_abms");
+ luaL_checktype(L, -1, LUA_TTABLE);
+ int registered_abms = lua_gettop(L);
+
+ if(lua_istable(L, registered_abms)){
+ int table = lua_gettop(L);
+ lua_pushnil(L);
+ while(lua_next(L, table) != 0){
+ // key at index -2 and value at index -1
+ int id = lua_tonumber(L, -2);
+ int current_abm = lua_gettop(L);
+
+ std::set<std::string> trigger_contents;
+ lua_getfield(L, current_abm, "nodenames");
+ if(lua_istable(L, -1)){
+ int table = lua_gettop(L);
+ lua_pushnil(L);
+ while(lua_next(L, table) != 0){
+ // key at index -2 and value at index -1
+ luaL_checktype(L, -1, LUA_TSTRING);
+ trigger_contents.insert(lua_tostring(L, -1));
+ // removes value, keeps key for next iteration
+ lua_pop(L, 1);
+ }
+ }
+ lua_pop(L, 1);
+
+ float trigger_interval = 10.0;
+ getfloatfield(L, current_abm, "interval", trigger_interval);
+
+ int trigger_chance = 50;
+ getintfield(L, current_abm, "chance", trigger_chance);
+
+ LuaABM *abm = new LuaABM(L, id, trigger_contents,
+ trigger_interval, trigger_chance);
+
+ env->addActiveBlockModifier(abm);
+
+ // removes value, keeps key for next iteration
+ lua_pop(L, 1);
+ }
+ }
+ lua_pop(L, 1);
}
#if 0