Guide Adding click-to-buff removal to interlude

[Celestine]

 

Being able to remove UD, Snipe, Stealth or CoV is great, especially in Interlude where these skills don't have a penalty enchant. Many people are already used to canceling Chant of Revenge before pressing Mirage or healing by removing Celestial Shield.

We will need

• server sources
• interface.u sources with compiler

 

Everything you need is freely available.


The server part

 

The server in our case is ACIS 36x, but any one will do (perhaps PTS). All that is required is to add a command that will remove the specified buff. To keep the example simple, let's get by with a bypass

To remove the buff, more modern clients send a RequestDispel packet , so we'll use the term dispel

First, let's add a dispel method to L2Character. Similar to more recent versions of the game, it will not remove effects that should remain after death (for example, penalties), debuffs, dances and songs:

 

// L2Character.java
 
public  final  void dispelSkillEffect ( int skillId, int skillLevel )  { 
	// Find skill with matching ID and level 
	final L2Skill skill = SkillTable. getInstance ( ) . getInfo ( skillId, skillLevel ) ; 
	// Skill wasn't found and can't be dispelled 
	if  ( skill ==  null ) 
	{ 
		return ; 
	} 
	// Penalty-like or debuff skill effect can't be dispelled 
	if  ( skill.isStayAfterDeath ( )  || skill. isDebuff ( ) ) 
	{ 
		return ; 
	} 
	// Dance-like skill effect can't be dispelled 
	if  ( skill. isDance ( ) ) 
	{ 
		return ; 
	} 
	// Stop skill effect by ID 
	_effects. stopSkillEffects ( skill. getId ( ) ) ; 
}
 
Code: Java

 

Now let's add the bypass handling to the runImpl of the RequestBypassToServer network packet that comes from the client. Since the dispelSkillEffect method requires a skill ID and skill level as arguments, the client must pass them as parameters to the dispel command :

 

// RequestBypassToServer.java
 
// Usage: _dispel:<int:skill_id>,<int:skill_level> 
// Example: _dispel:313,8 
else  if  ( _command. startsWith ( "_dispel" ) ) 
{ 
	// Cut out command params 
	String params = _command. substring ( _command. indexOf ( ":" )  +  1 ) ; 
	// Split params into tokens 
	StringTokenizer st =  new  StringTokenizer ( params, "," ) ; 
	// Get skill ID from first token 
	intid =  Integer . parseInt ( st.nextToken ( ) ) ; _ // Get skill level from second token int level = Integer . parseInt ( st.nextToken ( ) ) ; _ // Dispel skill effect on current character 
	activeChar. dispelSkillEffect ( id, level ) ; }
	
	 
	

 
Code: Java

 

 

Call example: _dispel:313,8 I

 

recommend making a command with similar parameters instead of bypass. In addition, then players will be able to write macros to remove the buff .

 

Client-side

 

 

Unfortunately, there is no easy way to track Alt + Click in the Interlude client, so we use the usual double-click of the left mouse button to remove the buff . The event will be handled by the AbnormalStatusWnd window , which displays the icons of buffs and debuffs
 

Algorithm:

 

1. We listen in the window AbnormalStatusWnd double click event (OnLButtonDblClick)
2. Determine the buff that was clicked (via StatusIcon.GetItem)
3. Determine the ID and skill level of this buff (via GetSkillInfo)
4. We send a request to the server (via RequestBypassToServer or ExecuteCommand)
5. We call dispelSkillEffect on the server with the received ID and skill level

 

The double-click event of the left mouse button OnLButtonDblClick receives only the click coordinates as arguments. At the same time, StatusIcon.GetItem requires specifying the row and column of the cell. Accordingly, it is necessary to determine in which row and which column of our buffs the player clicked

 

Since we know that the size of the buff cell is 24 pixels, and the size of the handle for which the window is dragged is 12 pixels, it is easy to calculate the row and cell: it is enough to determine the coordinates of the window with buffs, subtract all values and divide the remainder by the cell size. Values will be rounded correctly when cast to int First, let's add the NSTATUSICON_SIZE

 

constant , which describes the size of the buff cell, to the top of the script. The rest of the developer's constants have already been described:

 

// AbnormalStatusWnd.uc
 
class AbnormalStatusWnd extends UIScript ;
 
const NSTATUSICON_FRAMESIZE =  12 ; 
const NSTATUSICON_MAXCOL =  12 ; 
const NSTATUSICON_SIZE =  24 ;
 
// ...
 

 

Now, anywhere (for example, immediately after the OnEvent function), add the handling of the double click event:

 

// AbnormalStatusWnd.uc
 
function OnLButtonDblClick ( int X ,  int Y )  { 
	local Rect windowBounds ; 
	local int targetRow ; 
	local int targetCol ;
 
	local StatusIconInfo info ; 
	local SkillInfo skillInfo ;
 
	// Find window position 
	windowBounds = Me. GetRect ( ) ;
 
	// Process clicks outside of window frame only 
	if  ( X >  ( windowBounds. nX +  NSTATUSICON_FRAMESIZE ) ) {  // 
		Calc row and col of targeted icon 
		targetRow =  ( Y - windowBounds. nY )  / NSTATUSICON_SIZE ; 
		targetCol =  ( X - windowBounds. nX  - NSTATUSICON_FRAMESIZE )  / NSTATUSICON_SIZE ;
 
		// Store status info of targeted icon 
		StatusIcon. GetItem ( targetRow , targetCol , info ) ;
 
		// Store actual skill info and make sure it is exists 
		if  ( GetSkillInfo ( info. ClassID , info. Level , skillInfo ) )  { 
			// Request server to stop skill effect 
			// Usage: _dispel:<int:skill_id>,<int :skill_level> 
			// Example: _dispel:313,8 
			RequestBypassToServer ( "_dispel:" $ string ( skillInfo. SkillID ) $ "," $ string ( skillInfo. SkillLevel ) ) ) ; 
		} 
	} 
}

 

Compile interface.u, copy it to the client, run the game

Done!

 

Thanks, to Freelu.

[Kara]

In case you want in 1 line:

 

public final void dispelSkillEffect(final int skillId, final int skillLevel)
{
	Optional.ofNullable(SkillTable.getInstance().getInfo(skillId, skillLevel)).filter(Objects::nonNull) .filter(Predicate.not(Skill::isStayAfterDeath)).filter(Predicate.not(Skill::isDebuff)).filter(Predicate.not(Skill::isDance)).ifPresent(s -> _effects.stopSkillEffects(s.getId()));
}

 

Edited January 29, 2022 by Kara

[Celestine]

19 minutes ago, Kara said:

In case you want in 1 line:

 

public final void dispelSkillEffect(final int skillId, final int skillLevel)
{
	Optional.ofNullable(SkillTable.getInstance().getInfo(skillId, skillLevel)).filter(Objects::nonNull) .filter(Predicate.not(Skill::isStayAfterDeath)).filter(Predicate.not(Skill::isDebuff)).filter(Predicate.not(Skill::isDance)).ifPresent(s -> _effects.stopSkillEffects(s.getId()));
}

 

 

works too.

[Warcelo]

On 1/29/2022 at 3:55 PM, Celestine said:

// Find window position 
	windowBounds = Me. GetRect ( ) ;

Hi Celestine!, in the case of the "Me" variable, I think it was only necessary to describe to the people that it receives the window object in question that is being manipulated.

But great tutorial, congratulations.

[Eleven]

i managed to add it on aCis 399 but i cannot dipsell the last skill of the buffs raw. all the rest are ok. any clue?

32 minutes ago, Eleven said:

i managed to add it on aCis 399 but i cannot dipsell the last skill of the buffs raw. all the rest are ok. any clue?

on the last buff on any raw you need to press at the very left edge to dispell it. if you click on the middle of th e buff icon nothing happened. also if you pres to remove the buff before the last in the row, it is removing the last buff. something wrong with positions

49 minutes ago, Eleven said:

i managed to add it on aCis 399 but i cannot dipsell the last skill of the buffs raw. all the rest are ok. any clue?

on the last buff on any raw you need to press at the very left edge to dispell it. if you click on the middle of th e buff icon nothing happened. also if you pres to remove the buff before the last in the row, it is removing the last buff. something wrong with positions

const NSTATUSICON_SIZE =  26 ; this i think must be 26 and not 24. for me now is working perfect

[xdem]

On 1/29/2022 at 9:24 PM, Kara said:

In case you want in 1 line:

 

public final void dispelSkillEffect(final int skillId, final int skillLevel)
{
	Optional.ofNullable(SkillTable.getInstance().getInfo(skillId, skillLevel)).filter(Objects::nonNull) .filter(Predicate.not(Skill::isStayAfterDeath)).filter(Predicate.not(Skill::isDebuff)).filter(Predicate.not(Skill::isDance)).ifPresent(s -> _effects.stopSkillEffects(s.getId()));
}

 

 

fckn retard. this is not oneline and the usage of lambdas is designed for passing interfaces as arguments.

 

ur "one line" is one line as this is one line

 

private void dumbtardOneLiner()
{
	printf("ur retarded\n");printf("ur retarded\n");printf("ur retarded\n");printf("ur retarded\n");printf("ur retarded\n");printf("ur retarded\n");
}

 

[Kusaty]

Work on L2JFrozen?

[bolsonaro]

not working for the last buff of any line

[andy1984]

On 9/20/2022 at 5:34 AM, bolsonaro said:

not working for the last buff of any line

const NSTATUSICON_SIZE =  26 ;  must be 26 and not 24.

[bolsonaro]

On 10/4/2022 at 8:18 AM, andy1984 said:

const NSTATUSICON_SIZE =  26 ;  must be 26 and not 24.

thank you! that solved it

 

[SSnakEE]

Hello.
This code works well. It removes buff with double click, but If you preffer remove buff with ALT + mouse click, place this code in AbnormalStatusWnd.uc
 

function OnLButtonDown(WindowHandle a_WindowHandle, int X, int Y)
{ 

	local Rect windowBounds; 
	local int targetRow; 
	local int targetCol;
 
	local StatusIconInfo info; 
	local SkillInfo skillInfo;
 
 
	if (IsKeyDown(IK_alt) == false)
		return;
		
 
	// Find window position 
	windowBounds = Me.GetRect();
 
	// Process clicks outside of window frame only 
	if  (X > (windowBounds.nX + NSTATUSICON_FRAMESIZE))
	{  
		// Calc row and col of targeted icon 
		targetRow = (Y - windowBounds.nY) / NSTATUSICON_SIZE; 
		targetCol = (X - windowBounds.nX - NSTATUSICON_FRAMESIZE) / NSTATUSICON_SIZE;
 
		// Store status info of targeted icon 
		StatusIcon.GetItem(targetRow, targetCol, info);
 
		// Store actual skill info and make sure it is exists 
		if  (GetSkillInfo(info.ClassID, info.Level, skillInfo))
		{ 
			// Request server to stop skill effect 
			// Usage: _dispel:<int:skill_id>,<int :skill_level> 
			// Example: _dispel:313,8 
			RequestBypassToServer ( "_dispel:" $ string ( skillInfo. SkillID ) $ "," $ string ( skillInfo. SkillLevel ) ) ) ; 
		} 
	} 
}

 

[MonkZe]

On 11/27/2024 at 1:48 PM, SSnakEE said:

Hello.
This code works well. It removes buff with double click, but If you preffer remove buff with ALT + mouse click, place this code in AbnormalStatusWnd.uc
 

function OnLButtonDown(WindowHandle a_WindowHandle, int X, int Y)
{ 

	local Rect windowBounds; 
	local int targetRow; 
	local int targetCol;
 
	local StatusIconInfo info; 
	local SkillInfo skillInfo;
 
 
	if (IsKeyDown(IK_alt) == false)
		return;
		
 
	// Find window position 
	windowBounds = Me.GetRect();
 
	// Process clicks outside of window frame only 
	if  (X > (windowBounds.nX + NSTATUSICON_FRAMESIZE))
	{  
		// Calc row and col of targeted icon 
		targetRow = (Y - windowBounds.nY) / NSTATUSICON_SIZE; 
		targetCol = (X - windowBounds.nX - NSTATUSICON_FRAMESIZE) / NSTATUSICON_SIZE;
 
		// Store status info of targeted icon 
		StatusIcon.GetItem(targetRow, targetCol, info);
 
		// Store actual skill info and make sure it is exists 
		if  (GetSkillInfo(info.ClassID, info.Level, skillInfo))
		{ 
			// Request server to stop skill effect 
			// Usage: _dispel:<int:skill_id>,<int :skill_level> 
			// Example: _dispel:313,8 
			RequestBypassToServer ( "_dispel:" $ string ( skillInfo. SkillID ) $ "," $ string ( skillInfo. SkillLevel ) ) ) ; 
		} 
	} 
}

 

I was unable to edit that block in my interface.u, could u please share the file for ALT + mouse click?

Edited March 11, 2025 by MonkZe

[SSnakEE]

Sure. This is the AbnormalStatusWnd.uc file with ability of removing buff with ALT + click

https://pastebin.com/iVWpYysq

[MonkZe]

3 hours ago, SSnakEE said:

Sure. This is the AbnormalStatusWnd.uc file with ability of removing buff with ALT + click

https://pastebin.com/iVWpYysq

I ment interface.u file it self not the code. I can view the file and code inside, but I was unable to edit interface.u file to add the code u shared, could u please share the compiled interface.u file it self?

2 hours ago, MonkZe said:

I ment interface.u file it self not the code. I can view the file and code inside, but I was unable to edit interface.u file to add the code u shared, could u please share the compiled interface.u file it self?

Sorry my bad, I was compiling incorrectly, I looked up for correct compiler, works nicely! Both, Celestine and your version, works nicely! Ty

On 1/29/2022 at 6:55 PM, Celestine said:

 

Being able to remove UD, Snipe, Stealth or CoV is great, especially in Interlude where these skills don't have a penalty enchant. Many people are already used to canceling Chant of Revenge before pressing Mirage or healing by removing Celestial Shield.

We will need

• server sources
• interface.u sources with compiler

 

Everything you need is freely available.


The server part

 

The server in our case is ACIS 36x, but any one will do (perhaps PTS). All that is required is to add a command that will remove the specified buff. To keep the example simple, let's get by with a bypass

To remove the buff, more modern clients send a RequestDispel packet , so we'll use the term dispel

First, let's add a dispel method to L2Character. Similar to more recent versions of the game, it will not remove effects that should remain after death (for example, penalties), debuffs, dances and songs:

 

// L2Character.java
 
public  final  void dispelSkillEffect ( int skillId, int skillLevel )  { 
	// Find skill with matching ID and level 
	final L2Skill skill = SkillTable. getInstance ( ) . getInfo ( skillId, skillLevel ) ; 
	// Skill wasn't found and can't be dispelled 
	if  ( skill ==  null ) 
	{ 
		return ; 
	} 
	// Penalty-like or debuff skill effect can't be dispelled 
	if  ( skill.isStayAfterDeath ( )  || skill. isDebuff ( ) ) 
	{ 
		return ; 
	} 
	// Dance-like skill effect can't be dispelled 
	if  ( skill. isDance ( ) ) 
	{ 
		return ; 
	} 
	// Stop skill effect by ID 
	_effects. stopSkillEffects ( skill. getId ( ) ) ; 
}
 
Code: Java

 

Now let's add the bypass handling to the runImpl of the RequestBypassToServer network packet that comes from the client. Since the dispelSkillEffect method requires a skill ID and skill level as arguments, the client must pass them as parameters to the dispel command :

 

// RequestBypassToServer.java
 
// Usage: _dispel:<int:skill_id>,<int:skill_level> 
// Example: _dispel:313,8 
else  if  ( _command. startsWith ( "_dispel" ) ) 
{ 
	// Cut out command params 
	String params = _command. substring ( _command. indexOf ( ":" )  +  1 ) ; 
	// Split params into tokens 
	StringTokenizer st =  new  StringTokenizer ( params, "," ) ; 
	// Get skill ID from first token 
	intid =  Integer . parseInt ( st.nextToken ( ) ) ; _ // Get skill level from second token int level = Integer . parseInt ( st.nextToken ( ) ) ; _ // Dispel skill effect on current character 
	activeChar. dispelSkillEffect ( id, level ) ; }
	
	 
	

 
Code: Java

 

 

Call example: _dispel:313,8 I

 

recommend making a command with similar parameters instead of bypass. In addition, then players will be able to write macros to remove the buff .

 

Client-side

 

 

Unfortunately, there is no easy way to track Alt + Click in the Interlude client, so we use the usual double-click of the left mouse button to remove the buff . The event will be handled by the AbnormalStatusWnd window , which displays the icons of buffs and debuffs
 

Algorithm:

 

1. We listen in the window AbnormalStatusWnd double click event (OnLButtonDblClick)
2. Determine the buff that was clicked (via StatusIcon.GetItem)
3. Determine the ID and skill level of this buff (via GetSkillInfo)
4. We send a request to the server (via RequestBypassToServer or ExecuteCommand)
5. We call dispelSkillEffect on the server with the received ID and skill level

 

The double-click event of the left mouse button OnLButtonDblClick receives only the click coordinates as arguments. At the same time, StatusIcon.GetItem requires specifying the row and column of the cell. Accordingly, it is necessary to determine in which row and which column of our buffs the player clicked

 

Since we know that the size of the buff cell is 24 pixels, and the size of the handle for which the window is dragged is 12 pixels, it is easy to calculate the row and cell: it is enough to determine the coordinates of the window with buffs, subtract all values and divide the remainder by the cell size. Values will be rounded correctly when cast to int First, let's add the NSTATUSICON_SIZE

 

constant , which describes the size of the buff cell, to the top of the script. The rest of the developer's constants have already been described:

 

// AbnormalStatusWnd.uc
 
class AbnormalStatusWnd extends UIScript ;
 
const NSTATUSICON_FRAMESIZE =  12 ; 
const NSTATUSICON_MAXCOL =  12 ; 
const NSTATUSICON_SIZE =  24 ;
 
// ...
 

 

Now, anywhere (for example, immediately after the OnEvent function), add the handling of the double click event:

 

// AbnormalStatusWnd.uc
 
function OnLButtonDblClick ( int X ,  int Y )  { 
	local Rect windowBounds ; 
	local int targetRow ; 
	local int targetCol ;
 
	local StatusIconInfo info ; 
	local SkillInfo skillInfo ;
 
	// Find window position 
	windowBounds = Me. GetRect ( ) ;
 
	// Process clicks outside of window frame only 
	if  ( X >  ( windowBounds. nX +  NSTATUSICON_FRAMESIZE ) ) {  // 
		Calc row and col of targeted icon 
		targetRow =  ( Y - windowBounds. nY )  / NSTATUSICON_SIZE ; 
		targetCol =  ( X - windowBounds. nX  - NSTATUSICON_FRAMESIZE )  / NSTATUSICON_SIZE ;
 
		// Store status info of targeted icon 
		StatusIcon. GetItem ( targetRow , targetCol , info ) ;
 
		// Store actual skill info and make sure it is exists 
		if  ( GetSkillInfo ( info. ClassID , info. Level , skillInfo ) )  { 
			// Request server to stop skill effect 
			// Usage: _dispel:<int:skill_id>,<int :skill_level> 
			// Example: _dispel:313,8 
			RequestBypassToServer ( "_dispel:" $ string ( skillInfo. SkillID ) $ "," $ string ( skillInfo. SkillLevel ) ) ) ; 
		} 
	} 
}

 

Compile interface.u, copy it to the client, run the game

Done!

 

Thanks, to Freelu.

  

Question: what's the reason for disallowing songs/dances to be removed? I'm asking as some1 who has full buff npc buffer, with available option to throw on and off any buffs any time, would this block still makes usage?

// Dance-like skill effect can't be dispelled 
	if  ( skill. isDance ( ) ) 
	{ 
		return ; 
	} 

[SSnakEE]

ALT + click buff removal feature is available as part of the game in higher chronicles (gracia ++) and you cannot remove dances or songs, but ofc you can allow to remove it in IL, its just retail limitation