add structures (WIP)

src/logic/scripting/lua/libgeneration.cpp

@@ -1,4 +1,30 @@
 #include "api_lua.hpp"
 
+#include "files/files.hpp"
+#include "files/util.hpp"
+#include "coders/binary_json.hpp"
+#include "world/Level.hpp"
+#include "world/generator/Structure.hpp"
+
+using namespace scripting;
+
+static int l_save_structure(lua::State* L) {
+    auto pointA = lua::tovec<3>(L, 1);
+    auto pointB = lua::tovec<3>(L, 2);
+    auto filename = lua::require_string(L, 3);
+    if (!files::is_valid_name(filename)) {
+        throw std::runtime_error("invalid file name");
+    }
+    bool saveEntities = lua::toboolean(L, 4);
+    
+    auto structure = Structure::create(level, pointA, pointB, saveEntities);
+    auto map = structure->serialize();
+
+    auto bytes = json::to_binary(map.get());
+    files::write_bytes(fs::u8path(filename), bytes.data(), bytes.size());
+    return 0;
+}
+
 const luaL_Reg generationlib[] = {
+    {"save_structure", lua::wrap<l_save_structure>},
     {NULL, NULL}};