Remove some unused variable from Lua class wrappers

src/script/lua_api/l_noise.cpp

@@ -30,7 +30,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
   LuaPerlinNoise
 */
 
-LuaPerlinNoise::LuaPerlinNoise(NoiseParams *params) :
+LuaPerlinNoise::LuaPerlinNoise(const NoiseParams *params) :
 	np(*params)
 {
 }
@@ -141,12 +141,10 @@ luaL_Reg LuaPerlinNoise::methods[] = {
   LuaPerlinNoiseMap
 */
 
-LuaPerlinNoiseMap::LuaPerlinNoiseMap(NoiseParams *params, s32 seed, v3s16 size)
+LuaPerlinNoiseMap::LuaPerlinNoiseMap(const NoiseParams *np, s32 seed, v3s16 size)
 {
-	m_is3d = size.Z > 1;
-	np = *params;
 	try {
-		noise = new Noise(&np, seed, size.X, size.Y, size.Z);
+		noise = new Noise(np, seed, size.X, size.Y, size.Z);
 	} catch (InvalidNoiseParamsException &e) {
 		throw LuaError(e.what());
 	}
@@ -217,7 +215,7 @@ int LuaPerlinNoiseMap::l_get_3d_map(lua_State *L)
 	LuaPerlinNoiseMap *o = checkobject(L, 1);
 	v3f p = check_v3f(L, 2);
 
-	if (!o->m_is3d)
+	if (!o->is3D())
 		return 0;
 
 	Noise *n = o->noise;
@@ -248,7 +246,7 @@ int LuaPerlinNoiseMap::l_get_3d_map_flat(lua_State *L)
 	v3f p                = check_v3f(L, 2);
 	bool use_buffer      = lua_istable(L, 3);
 
-	if (!o->m_is3d)
+	if (!o->is3D())
 		return 0;
 
 	Noise *n = o->noise;
@@ -289,7 +287,7 @@ int LuaPerlinNoiseMap::l_calc_3d_map(lua_State *L)
 	LuaPerlinNoiseMap *o = checkobject(L, 1);
 	v3f p                = check_v3f(L, 2);
 
-	if (!o->m_is3d)
+	if (!o->is3D())
 		return 0;
 
 	Noise *n = o->noise;

src/script/lua_api/l_noise.h

@@ -30,6 +30,7 @@ class LuaPerlinNoise : public ModApiBase
 {
 private:
 	NoiseParams np;
+
 	static const char className[];
 	static luaL_Reg methods[];
 
@@ -42,7 +43,7 @@ private:
 	static int l_get_3d(lua_State *L);
 
 public:
-	LuaPerlinNoise(NoiseParams *params);
+	LuaPerlinNoise(const NoiseParams *params);
 	~LuaPerlinNoise() = default;
 
 	// LuaPerlinNoise(seed, octaves, persistence, scale)
@@ -59,9 +60,8 @@ public:
 */
 class LuaPerlinNoiseMap : public ModApiBase
 {
-	NoiseParams np;
 	Noise *noise;
-	bool m_is3d;
+
 	static const char className[];
 	static luaL_Reg methods[];
 
@@ -80,10 +80,11 @@ class LuaPerlinNoiseMap : public ModApiBase
 	static int l_get_map_slice(lua_State *L);
 
 public:
-	LuaPerlinNoiseMap(NoiseParams *np, s32 seed, v3s16 size);
-
+	LuaPerlinNoiseMap(const NoiseParams *np, s32 seed, v3s16 size);
 	~LuaPerlinNoiseMap();
 
+	inline bool is3D() const { return noise->sz > 1; }
+
 	// LuaPerlinNoiseMap(np, size)
 	// Creates an LuaPerlinNoiseMap and leaves it on top of stack
 	static int create_object(lua_State *L);

src/script/lua_api/l_vmanip.cpp

@@ -17,7 +17,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
-
+#include <map>
 #include "lua_api/l_vmanip.h"
 #include "lua_api/l_internal.h"
 #include "common/c_content.h"
@@ -112,23 +112,23 @@ int LuaVoxelManip::l_write_to_map(lua_State *L)
 
 	LuaVoxelManip *o = checkobject(L, 1);
 	bool update_light = !lua_isboolean(L, 2) || readParam<bool>(L, 2);
+
 	GET_ENV_PTR;
 	ServerMap *map = &(env->getServerMap());
+
+	std::map<v3s16, MapBlock*> modified_blocks;
 	if (o->is_mapgen_vm || !update_light) {
-		o->vm->blitBackAll(&(o->modified_blocks));
+		o->vm->blitBackAll(&modified_blocks);
 	} else {
-		voxalgo::blit_back_with_light(map, o->vm,
-			&(o->modified_blocks));
+		voxalgo::blit_back_with_light(map, o->vm, &modified_blocks);
 	}
 
 	MapEditEvent event;
 	event.type = MEET_OTHER;
-	for (const auto &modified_block : o->modified_blocks)
-		event.modified_blocks.insert(modified_block.first);
-
+	for (const auto &it : modified_blocks)
+		event.modified_blocks.insert(it.first);
 	map->dispatchEvent(event);
 
-	o->modified_blocks.clear();
 	return 0;
 }
 

src/script/lua_api/l_vmanip.h

@@ -19,7 +19,6 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 
 #pragma once
 
-#include <map>
 #include "irr_v3d.h"
 #include "lua_api/l_base.h"
 
@@ -33,7 +32,6 @@ class MMVManip;
 class LuaVoxelManip : public ModApiBase
 {
 private:
-	std::map<v3s16, MapBlock *> modified_blocks;
 	bool is_mapgen_vm = false;
 
 	static const char className[];