diff options
| -rw-r--r-- | src/lmathlib.js | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/src/lmathlib.js b/src/lmathlib.js index b10f7bf..32893a6 100644 --- a/src/lmathlib.js +++ b/src/lmathlib.js @@ -80,7 +80,9 @@ const math_acos = function(L) { }; const math_atan = function(L) { - lua.lua_pushnumber(L, Math.atan(lauxlib.luaL_checknumber(L, 1))); + let y = lauxlib.luaL_checknumber(L, 1); + let x = lauxlib.luaL_optnumber(L, 2, 1); + lua.lua_pushnumber(L, Math.atan2(y, x)); return 1; }; |