Add Java Edition flight controls as opt-in setting

Adds a 'Java Flight Controls' checkbox to Help & Options > Settings > Options that enables Java Edition-style creative flying physics when toggled on.

When enabled:

- Symmetric ascend/descend (0.15 per tick each direction)

- Air friction-based movement (flyingSpeed through LivingEntity::travel)

- 2x sprint fly speed multiplier

- Vertical momentum preserved (no yd=0 reset per tick)

When disabled, the original 4J flying behavior is unchanged.

Demo: https://youtu.be/o-I0CFnV7sU

Changes:

- C++: New game setting eGameSetting_JavaFlightControls with bitmask persistence

- UI: Checkbox in SettingsOptionsMenu (all 6 resolution variants + .arc archive)

- Flying: Conditional logic in LocalPlayer::aiStep() and Player::travel()/jumpFromGround()

Minecraft.Client/Common/App_Defines.h

@@ -104,6 +104,7 @@ enum EGameHostOptionWorldSize
 #define GAMESETTING_ANIMATEDCHARACTER					0x00008000
 #define GAMESETTING_PS3EULAREAD							0x00010000
 #define GAMESETTING_PSVITANETWORKMODEADHOC				0x00020000
+#define GAMESETTING_JAVAFLIGHTCONTROLS					0x00040000
 
 
 // defines for languages

Minecraft.Client/Common/App_enums.h

@@ -178,6 +178,8 @@ enum eGameSetting
 	// PSVita
 	eGameSetting_PSVita_NetworkModeAdhoc,
 
+	// Windows64
+	eGameSetting_JavaFlightControls,
 
 };
 

Minecraft.Client/Common/Consoles_App.cpp

@@ -2308,6 +2308,13 @@ void CMinecraftApp::SetGameSettings(int iPad,eGameSetting eVal,unsigned char ucV
 			GameSettingsA[iPad]->bSettingsChanged=true;
 		}
 		break;
+	case eGameSetting_JavaFlightControls:
+		if(ucVal==1)
+			GameSettingsA[iPad]->uiBitmaskValues|=GAMESETTING_JAVAFLIGHTCONTROLS;
+		else
+			GameSettingsA[iPad]->uiBitmaskValues&=~GAMESETTING_JAVAFLIGHTCONTROLS;
+		GameSettingsA[iPad]->bSettingsChanged=true;
+		break;
 
 	}
 }
@@ -2444,6 +2451,9 @@ unsigned char CMinecraftApp::GetGameSettings(int iPad,eGameSetting eVal)
 	case eGameSetting_PSVita_NetworkModeAdhoc:
 		return (GameSettingsA[iPad]->uiBitmaskValues&GAMESETTING_PSVITANETWORKMODEADHOC)>>17;
 
+	case eGameSetting_JavaFlightControls:
+		return (GameSettingsA[iPad]->uiBitmaskValues&GAMESETTING_JAVAFLIGHTCONTROLS)?1:0;
+
 	}
 	return 0;
 }

Minecraft.Client/Common/UI/UIScene_SettingsOptionsMenu.cpp

@@ -35,6 +35,7 @@ UIScene_SettingsOptionsMenu::UIScene_SettingsOptionsMenu(int iPad, void *initDat
 	m_checkboxShowHints.init(IDS_HINTS,eControl_ShowHints,(app.GetGameSettings(m_iPad,eGameSetting_Hints)!=0));
 	m_checkboxShowTooltips.init(IDS_IN_GAME_TOOLTIPS,eControl_ShowTooltips,(app.GetGameSettings(m_iPad,eGameSetting_Tooltips)!=0));
 	m_checkboxInGameGamertags.init(IDS_IN_GAME_GAMERTAGS,eControl_InGameGamertags,(app.GetGameSettings(m_iPad,eGameSetting_GamertagsVisible)!=0));
+	m_checkboxJavaFlightControls.init(L"Java Flight Controls",eControl_JavaFlightControls,(app.GetGameSettings(m_iPad,eGameSetting_JavaFlightControls)!=0));
 
 	// check if we should display the mash-up option
 	if(m_bNotInGame && app.GetMashupPackWorlds(m_iPad)!=0xFFFFFFFF)
@@ -259,6 +260,7 @@ void UIScene_SettingsOptionsMenu::handleReload()
 	m_checkboxShowHints.init(IDS_HINTS,eControl_ShowHints,(app.GetGameSettings(m_iPad,eGameSetting_Hints)!=0));
 	m_checkboxShowTooltips.init(IDS_IN_GAME_TOOLTIPS,eControl_ShowTooltips,(app.GetGameSettings(m_iPad,eGameSetting_Tooltips)!=0));
 	m_checkboxInGameGamertags.init(IDS_IN_GAME_GAMERTAGS,eControl_InGameGamertags,(app.GetGameSettings(m_iPad,eGameSetting_GamertagsVisible)!=0));
+	m_checkboxJavaFlightControls.init(L"Java Flight Controls",eControl_JavaFlightControls,(app.GetGameSettings(m_iPad,eGameSetting_JavaFlightControls)!=0));
 
 	// check if we should display the mash-up option
 	if(m_bNotInGame && app.GetMashupPackWorlds(m_iPad)!=0xFFFFFFFF)
@@ -415,6 +417,7 @@ void UIScene_SettingsOptionsMenu::setGameSettings()
 	app.SetGameSettings(m_iPad,eGameSetting_GamertagsVisible,m_checkboxInGameGamertags.IsChecked()?1:0);
 	app.SetGameSettings(m_iPad,eGameSetting_Hints,m_checkboxShowHints.IsChecked()?1:0);
 	app.SetGameSettings(m_iPad,eGameSetting_Tooltips,m_checkboxShowTooltips.IsChecked()?1:0);
+	app.SetGameSettings(m_iPad,eGameSetting_JavaFlightControls,m_checkboxJavaFlightControls.IsChecked()?1:0);
 
 	// the mashup option will only be shown if some worlds have been previously hidden
 	if(m_bMashUpWorldsUnhideOption && m_checkboxMashupWorlds.IsChecked())

Minecraft.Client/Common/UI/UIScene_SettingsOptionsMenu.h

@@ -11,6 +11,7 @@ private:
 		eControl_ShowHints,
 		eControl_ShowTooltips,
 		eControl_InGameGamertags,
+		eControl_JavaFlightControls,
 		eControl_ShowMashUpWorlds,
 		eControl_Autosave,
 		eControl_Languages,
@@ -21,7 +22,7 @@ protected:
 	static int m_iDifficultyTitleSettingA[4];
 
 private:
-	UIControl_CheckBox m_checkboxViewBob, m_checkboxShowHints, m_checkboxShowTooltips, m_checkboxInGameGamertags, m_checkboxMashupWorlds; // Checkboxes
+	UIControl_CheckBox m_checkboxViewBob, m_checkboxShowHints, m_checkboxShowTooltips, m_checkboxInGameGamertags, m_checkboxJavaFlightControls, m_checkboxMashupWorlds; // Checkboxes
 	UIControl_Slider m_sliderAutosave, m_sliderDifficulty; // Sliders
 	UIControl_Label m_labelDifficultyText; //Text
 	UIControl_Button m_buttonLanguageSelect;
@@ -31,6 +32,7 @@ private:
 		UI_MAP_ELEMENT( m_checkboxShowHints, "ShowHints")
 		UI_MAP_ELEMENT( m_checkboxShowTooltips, "ShowTooltips")
 		UI_MAP_ELEMENT( m_checkboxInGameGamertags, "InGameGamertags")
+		UI_MAP_ELEMENT( m_checkboxJavaFlightControls, "JavaFlightControls")
 		UI_MAP_ELEMENT( m_checkboxMashupWorlds, "ShowMashUpWorlds")
 		UI_MAP_ELEMENT( m_sliderAutosave, "Autosave")
 		UI_MAP_ELEMENT( m_sliderDifficulty, "Difficulty")

Minecraft.Client/LocalPlayer.cpp

@@ -252,7 +252,8 @@ void LocalPlayer::aiStep()
 	bool forwardEnoughToContinueSprint = input->ya >= runTreshold;
 
 	// 4J - altered this slightly to make sure that the joypad returns to below returnTreshold in between registering two movements up to runThreshold
-	if ((onGround || abilities.flying) && !isSprinting() && enoughFoodToSprint && !isUsingItem() && !hasEffect(MobEffect::blindness))
+	bool javaFlight = app.GetGameSettings(m_iPad, eGameSetting_JavaFlightControls) != 0;
+	if ((onGround || (javaFlight && abilities.flying)) && !isSprinting() && enoughFoodToSprint && !isUsingItem() && !hasEffect(MobEffect::blindness))
 	{
 		if( !wasRunning && forwardEnoughToTriggerSprint )
 		{
@@ -278,7 +279,7 @@ void LocalPlayer::aiStep()
 	}
 	if (isSneaking()) sprintTriggerTime = 0;
 #ifdef _WINDOWS64
-	if (input->sprinting && (onGround || abilities.flying) && enoughFoodToSprint && !isUsingItem() && !hasEffect(MobEffect::blindness) && !isSneaking())
+	if (input->sprinting && (onGround || (javaFlight && abilities.flying)) && enoughFoodToSprint && !isUsingItem() && !hasEffect(MobEffect::blindness) && !isSneaking())
 	{
 		setSprinting(true);
 	}
@@ -333,10 +334,20 @@ void LocalPlayer::aiStep()
 
 	if (abilities.flying)
 	{
-		if (ullButtonsPressed & (1LL<<MINECRAFT_ACTION_SNEAK_TOGGLE) ) yd -= 0.15f;
-		if (input->jumping)
+		if (javaFlight)
 		{
-			yd += 0.15f;
+			if (ullButtonsPressed & (1LL<<MINECRAFT_ACTION_SNEAK_TOGGLE) ) yd -= 0.15f;
+			if (input->jumping) yd += 0.15f;
+		}
+		else
+		{
+			// 4J - note that the 0.42 added for going down is to make it match with what happens when you jump - jumping itself adds 0.42 to yd in Mob::jumpFromGround
+			if (ullButtonsPressed & (1LL<<MINECRAFT_ACTION_SNEAK_TOGGLE) ) yd -= ( 0.15 + 0.42 );
+			if (input->jumping)
+			{
+				noJumpDelay = 0;
+				yd += 0.15;
+			}
 		}
 
 		// snap y rotation to nearest 90 degree axis aligned value
@@ -431,22 +442,50 @@ void LocalPlayer::aiStep()
 		else
 #endif
 		{
-			flyX = 0.0f;
-			flyY = 0.0f;
-			flyZ = 0.0f;
-			if( ullDpad_filtered & (1LL<<MINECRAFT_ACTION_DPAD_UP))
+			if (javaFlight)
 			{
-				flyY = 0.1f;
+				// Java Edition style: no sprint-fly viewVector overlay, simple dpad up/down
+				flyX = 0.0f;
+				flyY = 0.0f;
+				flyZ = 0.0f;
+				if( ullDpad_filtered & (1LL<<MINECRAFT_ACTION_DPAD_UP))
+					flyY = 0.1f;
+				if( ullDpad_filtered & (1LL<<MINECRAFT_ACTION_DPAD_DOWN))
+					flyY = -0.1f;
 			}
-			if( ullDpad_filtered & (1LL<<MINECRAFT_ACTION_DPAD_DOWN))
+			else
 			{
-				flyY = -0.1f;
+				if( isSprinting() )
+				{
+					// 4J: Accelrate up to full speed if we are sprinting, moving in the direction of the view vector
+					flyX = (float)viewVector->x * input->ya;
+					flyY = (float)viewVector->y * input->ya;
+					flyZ = (float)viewVector->z * input->ya;
+
+					float scale = ((float)(SPRINT_DURATION - sprintTime))/10.0f;
+					scale = scale * scale;
+					if ( scale > 1.0f ) scale = 1.0f;
+					flyX *= scale;
+					flyY *= scale;
+					flyZ *= scale;
+				}
+				else
+				{
+					flyX = 0.0f;
+					flyY = 0.0f;
+					flyZ = 0.0f;
+					if( ullDpad_filtered & (1LL<<MINECRAFT_ACTION_DPAD_UP))
+						flyY = 0.1f;
+					if( ullDpad_filtered & (1LL<<MINECRAFT_ACTION_DPAD_DOWN))
+						flyY = -0.1f;
+				}
 			}
 		}
 
 		Player::move(flyX, flyY, flyZ);
 
 		fallDistance = 0.0f;
+		if (!javaFlight) yd = 0.0f;
 		onGround = true;
 	}
 

Minecraft.World/Player.cpp

@@ -1015,7 +1015,8 @@ void Player::aiStep()
 	flyingSpeed = defaultFlySpeed;
 	if (isSprinting())
 	{
-		flyingSpeed += defaultFlySpeed;
+		bool javaFlight = abilities.flying && app.GetGameSettings(0, eGameSetting_JavaFlightControls) != 0;
+		flyingSpeed += defaultFlySpeed * (javaFlight ? 1.0f : 0.3f);
 	}
 
 	setSpeed((float) speed->getValue());
@@ -2082,7 +2083,8 @@ void Player::awardStat(Stat *stat, byteArray paramBlob)
 
 void Player::jumpFromGround()
 {
-	if (abilities.flying) return;
+	if (abilities.flying && app.GetGameSettings(0, eGameSetting_JavaFlightControls) != 0)
+		return;
 
 	LivingEntity::jumpFromGround();
 
@@ -2108,12 +2110,22 @@ void Player::travel(float xa, float ya)
 	{
 		double savedYd = yd;
 		float ofs = flyingSpeed;
-		flyingSpeed = abilities.getFlyingSpeed() * (isSprinting() ? 2 : 1);
-		bool wasOnGround = onGround;
-		onGround = false;
-		LivingEntity::travel(xa, ya);
-		onGround = wasOnGround;
-		yd = savedYd * 0.6;
+		bool javaFlight = app.GetGameSettings(0, eGameSetting_JavaFlightControls) != 0;
+		if (javaFlight)
+		{
+			flyingSpeed = abilities.getFlyingSpeed() * (isSprinting() ? 2 : 1);
+			bool wasOnGround = onGround;
+			onGround = false;
+			LivingEntity::travel(xa, ya);
+			onGround = wasOnGround;
+			yd = savedYd * 0.6;
+		}
+		else
+		{
+			flyingSpeed = abilities.getFlyingSpeed();
+			LivingEntity::travel(xa, ya);
+			yd = savedYd * 0.6;
+		}
 		flyingSpeed = ofs;
 	}
 	else