Refresh on the TimeStep update of Space itself.

src/LuaEngine.cpp

@@ -394,12 +394,6 @@ static int l_engine_get_amount_stars(lua_State *l)
 	return 1;
 }
 
-static int l_engine_refresh_background(lua_State *l)
-{
-	Pi::RefreshBackground();
-	return 0;
-}
-
 static void set_master_volume(const bool muted, const float volume)
 {
 	Sound::Pause(muted || is_zero_exact(volume));
@@ -823,7 +817,6 @@ void LuaEngine::Register()
 
 		{ "SetAmountStars", l_engine_set_amount_stars },
 		{ "GetAmountStars", l_engine_get_amount_stars },
-		{ "RefreshBackground", l_engine_refresh_background },
 
 		{ "GetMasterMuted", l_engine_get_master_muted },
 		{ "SetMasterMuted", l_engine_set_master_muted },

src/Pi.cpp

@@ -126,6 +126,7 @@ std::map<SDL_JoystickID,Pi::JoystickState> Pi::joysticks;
 bool Pi::navTunnelDisplayed;
 bool Pi::speedLinesDisplayed = false;
 bool Pi::hudTrailsDisplayed = false;
+bool Pi::bRefreshBackgroundStars = false;
 float Pi::amountOfBackgroundStarsDisplayed = 1.0f;
 Gui::Fixed *Pi::menu;
 bool Pi::DrawGUI = true;
@@ -715,12 +716,6 @@ void Pi::SetView(View *v)
 	if (currentView) currentView->Attach();
 }
 
-void Pi::RefreshBackground()
-{
-	if(game && game->GetSpace())
-		game->GetSpace()->RefreshBackground();
-}
-
 void Pi::OnChangeDetailLevel()
 {
 	BaseSphere::OnChangeDetailLevel();

src/Pi.h

@@ -137,9 +137,13 @@ public:
 	static void SetView(View *v);
 	static View *GetView() { return currentView; }
 
-	static void SetAmountBackgroundStars(const float pc) { amountOfBackgroundStarsDisplayed = Clamp(pc, 0.01f, 1.0f); }
+	static void SetAmountBackgroundStars(const float pc) { amountOfBackgroundStarsDisplayed = Clamp(pc, 0.01f, 1.0f); bRefreshBackgroundStars = true; }
 	static float GetAmountBackgroundStars() { return amountOfBackgroundStarsDisplayed; }
-	static void RefreshBackground();
+	static bool MustRefreshBackgroundClearFlag() { 
+		const bool bRet = bRefreshBackgroundStars;
+		bRefreshBackgroundStars = false;
+		return bRet; 
+	}
 
 #if WITH_DEVKEYS
 	static bool showDebugInfo;
@@ -211,6 +215,7 @@ private:
 	static bool navTunnelDisplayed;
 	static bool speedLinesDisplayed;
 	static bool hudTrailsDisplayed;
+	static bool bRefreshBackgroundStars;
 	static float amountOfBackgroundStarsDisplayed;
 
 	static Gui::Fixed *menu;

src/Space.cpp

@@ -915,6 +915,10 @@ void Space::CollideFrame(Frame *f)
 void Space::TimeStep(float step)
 {
 	PROFILE_SCOPED()
+
+	if( Pi::MustRefreshBackgroundClearFlag() )
+		RefreshBackground();
+
 	m_frameIndexValid = m_bodyIndexValid = m_sbodyIndexValid = false;
 
 	// XXX does not need to be done this often