oss/luanti
oss/luanti
1
0
Fork 0
mirror of https://github.com/luanti-org/luanti.git synced 2025-06-27 16:36:03 +00:00
Code Wiki Activity

Expose getPointedThing to Lua

Browse source 
This commit introduces Raycast, a Lua user object, which can be
used to perform a raycast on the map. The ray is continuable, so one can
also get hidden nodes (for example to see trough glass).
This commit is contained in:
Dániel Juhász 2016-07-23 21:11:20 +02:00 • committed by paramat
parent a80ecbee1e
commit 3caad3f3c9
25 changed files with 671 additions and 313 deletions
Download patch file Download diff file Expand all files Collapse all files

105
src/script/lua_api/l_env.cpp
View file

@ -131,6 +131,105 @@ void LuaLBM::trigger(ServerEnvironment *env, v3s16 p, MapNode n)
lua_pop(L, 1); // Pop error handler
}
int LuaRaycast::l_next(lua_State *L)
{
MAP_LOCK_REQUIRED;
ScriptApiItem *script = getScriptApi<ScriptApiItem>(L);
GET_ENV_PTR;
LuaRaycast *o = checkobject(L, 1);
PointedThing pointed;
env->continueRaycast(&o->state, &pointed);
if (pointed.type == POINTEDTHING_NOTHING)
lua_pushnil(L);
else
script->pushPointedThing(pointed);
return 1;
}
int LuaRaycast::create_object(lua_State *L)
{
NO_MAP_LOCK_REQUIRED;
bool objects = true;
bool liquids = false;
v3f pos1 = checkFloatPos(L, 1);
v3f pos2 = checkFloatPos(L, 2);
if (lua_isboolean(L, 3)) {
objects = lua_toboolean(L, 3);
}
if (lua_isboolean(L, 4)) {
liquids = lua_toboolean(L, 4);
}
LuaRaycast *o = new LuaRaycast(core::line3d<f32>(pos1, pos2),
objects, liquids);
*(void **) (lua_newuserdata(L, sizeof(void *))) = o;
luaL_getmetatable(L, className);
lua_setmetatable(L, -2);
return 1;
}
LuaRaycast *LuaRaycast::checkobject(lua_State *L, int narg)
{
NO_MAP_LOCK_REQUIRED;
luaL_checktype(L, narg, LUA_TUSERDATA);
void *ud = luaL_checkudata(L, narg, className);
if (!ud)
luaL_typerror(L, narg, className);
return *(LuaRaycast **) ud;
}
int LuaRaycast::gc_object(lua_State *L)
{
LuaRaycast *o = *(LuaRaycast **) (lua_touserdata(L, 1));
delete o;
return 0;
}
void LuaRaycast::Register(lua_State *L)
{
lua_newtable(L);
int methodtable = lua_gettop(L);
luaL_newmetatable(L, className);
int metatable = lua_gettop(L);
lua_pushliteral(L, "__metatable");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__index");
lua_pushvalue(L, methodtable);
lua_settable(L, metatable);
lua_pushliteral(L, "__gc");
lua_pushcfunction(L, gc_object);
lua_settable(L, metatable);
lua_pushliteral(L, "__call");
lua_pushcfunction(L, l_next);
lua_settable(L, metatable);
lua_pop(L, 1);
luaL_openlib(L, 0, methods, 0);
lua_pop(L, 1);
lua_register(L, className, create_object);
}
const char LuaRaycast::className[] = "Raycast";
const luaL_Reg LuaRaycast::methods[] =
{
luamethod(LuaRaycast, next),
{ 0, 0 }
};
void LuaEmergeAreaCallback(v3s16 blockpos, EmergeAction action, void *param)
{
ScriptCallbackState *state = (ScriptCallbackState *)param;
@ -904,6 +1003,11 @@ int ModApiEnvMod::l_fix_light(lua_State *L)
return 1;
}
int ModApiEnvMod::l_raycast(lua_State *L)
{
return LuaRaycast::create_object(L);
}
// emerge_area(p1, p2, [callback, context])
// emerge mapblocks in area p1..p2, calls callback with context upon completion
int ModApiEnvMod::l_emerge_area(lua_State *L)
@ -1155,6 +1259,7 @@ void ModApiEnvMod::Initialize(lua_State *L, int top)
API_FCT(spawn_tree);
API_FCT(find_path);
API_FCT(line_of_sight);
API_FCT(raycast);
API_FCT(transforming_liquid_add);
API_FCT(forceload_block);
API_FCT(forceload_free_block);