invert_mouse config option

--HG--
extra : rebase_source : 2695ad71185244cefbcf6e3e28ba1ab5e54c882f

doc/changelog.txt

@@ -14,6 +14,7 @@ X:
 - Player passwords
 - All textures first searched from texture_path
 - Map directory ("map") has been renamed to "world" (just rename it to load an old world)
+- Mouse inversion (invert_mouse)
 
 2011-04-24:
 - Smooth lighting with simple ambient occlusion

minetest.conf.example

@@ -42,6 +42,8 @@
 #keymap_special1 = KEY_KEY_E
 #keymap_print_debug_stacks = KEY_KEY_P
 
+#invert_mouse = false
+
 # The desired FPS
 #wanted_fps = 30
 

src/defaultsettings.cpp

@@ -65,6 +65,7 @@ void set_default_settings()
 	g_settings.setDefault("free_move", "false");
 	g_settings.setDefault("continuous_forward", "false");
 	g_settings.setDefault("fast_move", "false");
+	g_settings.setDefault("invert_mouse", "false");
 
 	// Server stuff
 	g_settings.setDefault("enable_experimental", "false");

src/game.cpp

@@ -895,6 +895,8 @@ void the_game(
 
 	float damage_flash_timer = 0;
 	
+	bool invert_mouse = g_settings.getBool("invert_mouse");
+
 	/*
 		Main loop
 	*/
@@ -1306,6 +1308,8 @@ void the_game(
 			else{
 				s32 dx = input->getMousePos().X - displaycenter.X;
 				s32 dy = input->getMousePos().Y - displaycenter.Y;
+				if(invert_mouse)
+					dy = -dy;
 				//std::cout<<"window active, pos difference "<<dx<<","<<dy<<std::endl;
 				
 				/*const float keyspeed = 500;