Only fly through walls in noclip mode wich requires the noclip privilege

builtin/privileges.lua

@@ -44,5 +44,9 @@ minetest.register_privilege("fast", {
 	description = "Can walk fast using the fast_move mode",
 	give_to_singleplayer = false,
 })
+minetest.register_privilege("noclip", {
+	description = "Can fly through walls",
+	give_to_singleplayer = false,
+})
 minetest.register_privilege("rollback", "Can use the rollback functionality")
 

src/defaultsettings.cpp

@@ -43,6 +43,7 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("keymap_rangeselect", "KEY_KEY_R");
 	settings->setDefault("keymap_freemove", "KEY_KEY_K");
 	settings->setDefault("keymap_fastmove", "KEY_KEY_J");
+	settings->setDefault("keymap_noclip", "KEY_KEY_H");
 	settings->setDefault("keymap_screenshot", "KEY_F12");
 	settings->setDefault("keymap_toggle_hud", "KEY_F1");
 	settings->setDefault("keymap_toggle_chat", "KEY_F2");
@@ -95,6 +96,7 @@ void set_default_settings(Settings *settings)
 	settings->setDefault("shader_path", "");
 	settings->setDefault("video_driver", "opengl");
 	settings->setDefault("free_move", "false");
+	settings->setDefault("noclip", "false");
 	settings->setDefault("continuous_forward", "false");
 	settings->setDefault("fast_move", "false");
 	settings->setDefault("invert_mouse", "false");

src/game.cpp

@@ -1665,6 +1665,23 @@ void the_game(
 					statustext += L" (note: no 'fast' privilege)";
 			}
 		}
+		else if(input->wasKeyDown(getKeySetting("keymap_noclip")))
+		{
+			if(g_settings->getBool("noclip"))
+			{
+				g_settings->set("noclip","false");
+				statustext = L"noclip disabled";
+				statustext_time = 0;
+			}
+			else
+			{
+				g_settings->set("noclip","true");
+				statustext = L"noclip enabled";
+				statustext_time = 0;
+				if(!client.checkPrivilege("noclip"))
+					statustext += L" (note: no 'noclip' privilege)";
+			}
+		}
 		else if(input->wasKeyDown(getKeySetting("keymap_screenshot")))
 		{
 			irr::video::IImage* const image = driver->createScreenShot(); 

src/guiKeyChangeMenu.cpp

@@ -46,6 +46,7 @@ enum
 	GUI_ID_KEY_FLY_BUTTON,
 	GUI_ID_KEY_FAST_BUTTON,
 	GUI_ID_KEY_JUMP_BUTTON,
+	GUI_ID_KEY_NOCLIP_BUTTON,
 	GUI_ID_KEY_CHAT_BUTTON,
 	GUI_ID_KEY_CMD_BUTTON,
 	GUI_ID_KEY_CONSOLE_BUTTON,
@@ -362,6 +363,7 @@ void GUIKeyChangeMenu::init_keys()
 	this->add_key(GUI_ID_KEY_CONSOLE_BUTTON, "Console", "keymap_console");
 	this->add_key(GUI_ID_KEY_FLY_BUTTON, "Toggle fly", "keymap_freemove");
 	this->add_key(GUI_ID_KEY_FAST_BUTTON, "Toggle fast", "keymap_fastmove");
+	this->add_key(GUI_ID_KEY_NOCLIP_BUTTON, "Toggle noclip", "keymap_noclip");
 	this->add_key(GUI_ID_KEY_RANGE_BUTTON, "Range select", "keymap_rangeselect");
 	this->add_key(GUI_ID_KEY_DUMP_BUTTON, "Print stacks", "keymap_print_debug_stacks");
 }

src/localplayer.cpp

@@ -73,9 +73,11 @@ void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d,
 		return;
 	}
 
-	// Skip collision detection if a special movement mode is used
+	// Skip collision detection if noclip mode is used
 	bool fly_allowed = m_gamedef->checkLocalPrivilege("fly");
-	bool free_move = fly_allowed && g_settings->getBool("free_move");
+	bool noclip = m_gamedef->checkLocalPrivilege("noclip") &&
+		g_settings->getBool("noclip");
+	bool free_move = noclip && fly_allowed && g_settings->getBool("free_move");
 	if(free_move)
 	{
         position += m_speed * dtime;
@@ -300,7 +302,8 @@ void LocalPlayer::move(f32 dtime, Map &map, f32 pos_max_d,
 		Report collisions
 	*/
 	bool bouncy_jump = false;
-	if(collision_info)
+	// Dont report if flying
+	if(collision_info && !g_settings->getBool("free_move"))
 	{
 		for(size_t i=0; i<result.collisions.size(); i++){
 			const CollisionInfo &info = result.collisions[i];