int gr_node_set_bump_cmd(lua_State* L) { GRLUA_DEBUG_CALL; gr_node_ud* selfdata = (gr_node_ud*)luaL_checkudata(L, 1, "gr.node"); luaL_argcheck(L, selfdata != 0, 1, "Node expected"); GeometryNode* self = dynamic_cast<GeometryNode*>(selfdata->node); luaL_argcheck(L, self != 0, 1, "Geometry node expected"); const char* filename = luaL_checkstring(L, 2); self->set_bump(filename); return 0; }