S&box Wiki

AnimEvents, AnimGraph Tags, Attachments

What are AnimEvents?

AnimEvents are used in ModelDoc as a way to make something happen during a specific frame of a Simple Animation, most commonly used to:

What are AnimGraph Tags?

Animgraph Tags are used inside an AnimGraph to communicate with itself. You can specify the start and end of when a Tag is active inside individual Animation Clips, most commonly used to:


An Attachment is a point, similar to bones, but created in ModelDoc, and is required for many functions that need a position, like most AnimEvents.

Creating Attachments in ModelDoc:

1. Press ✙add, add an Attachment and name it.

2. Select which Bone will be its parent, this is the bone it will follow.

You can select "None", this will instead use the origin of the model.

3. Position the attachment (you can use the various gizmos in the top left to aid you).


This should be the final result (mouth is the attachment):

The RED arrow indicates forward, while the BLUE arrow is up, make sure they are correct by rotating the attachment in the node itself.


To add an AnimEvent Right Click a Simple Animation node, and select Add AnimEvent...


Once you selected an AnimEvent, you can choose the frame it will activate either in the Timeline, by dragging the AnimEvent, or in the Event's node by typing the frame.


Sound Events

To play a sound, select:

  • AE_CL_PLAYSOUND: Play a sound Clientside from the model's origin.
  • AE_CL_PLAYSOUND_ATTACHMENT: Play a sound ClientSide from an Attachment.
  • AE_SV_PLAYSOUND: Play a sound Serverside from the model's origin.

Then select a sound, after compiling, you can preview the AnimEvent:

Particle Events

To create particles, select:

  • AE_CL_CREATE_PARTICLE_EFFECT: Create a particle from an Attachment.
  • AE_CL_ADD_PARTICLE_EFFECT_CP: Add a Control Point for a Particle from an Attachment.

Then select a particle, and leave the default attachment type as is, as it should be fine for most cases. After compiling, you can preview the AnimEvent:

BodyGroup Events

To switch bodygroups, select:

  • AE_CL_BODYGROUP_SET_VALUE: Set the Value of a bodygroup, clientside.
  • AE_SV_BODYGROUP_SET_VALUE: Set the Value of a bodygroup, Serverside.
  • AE_CL_ENABLE_BODYGROUP: Enable a bodygroup
  • AE_CL_DISABLE_BODYGROUP: Disable a bodygroup

Then Select a bodygroup, and the desired value (equivalent to their "Choice" number, starting from 0). After compiling, you can preview the AnimEvent:

FootStep Events

To add dynamic footsteps, select:

  • AE_FOOTSTEP: Play a dynamic Footstep sound from an Attachment

You may set the Volume of the footstep, and whether it's LEFT or RIGHT (Even if your character has more than 2 feet).

public override void OnAnimEventFootstep( Vector3 position, int foot, float volume ) { var trace = Trace.Ray( position, position + Vector3.Down * 10f ) .Ignore( this ) .Run(); var surface = trace.Surface; var sound = surface.Sounds.FootLand; Sound.FromWorld( sound, trace.HitPosition ) .SetVolume( volume ); }

This example code is used for footsteps by checking the surface type below.

Run code with Generic Events

You may also add Generic Events that do nothing, but signal your game when the animation has an event.

AE_GENERIC_EVENT can include:

  • Integer data
  • Float data
  • Vector data
  • String data
  • Type Name
public override void OnAnimEventGeneric( string name, int intData, float floatData, Vector3 vectorData, string stringData ) { if ( name == "punch_impact_R" ) { var rightFist = GetAttachment( "hand_R" ); if ( rightFist != null ) { DebugOverlay.Sphere( rightFist.Value.Position, 20f, Color.Red, 1f ); Sound.FromWorld( "sounds/impacts/impact-bullet-flesh.sound", rightFist.Value.Position ); } } }

This example code will create a red sphere when the generic event punch_impact is activated, at the position of the hand_R attachment (You do not have the option to use an Attachment in the AnimEvent itself).

AnimGraph Tags

To add a Tag in your Animgraph:

  1. In the Tags widget, press and select Internal Tag, name it accordingly.

Then, to set the Tag inside your Animation Clips:

  1. Double Click an Animation Clip to enter it.
  2. Press and select your Tag
  3. Slide the Tag's start and end for the desired duration

In this example, the "Invincibility Frames" tag lasts from 0.5s to 1.0s

Tag Condition in a State Machine

Inside a state machine, you can select Internal Tags as Tag Condition


In this example, the "Disable LookAt" tag is used to disable a LookAt chain at the start of either "Growl" or "Howl" animations, until they finish their respective action.

Run Code with Tags

You can also use Tags to run code:

protected override void OnAnimGraphTag( string tag, AnimGraphTagEvent fireMode ) { if ( tag == "Invincibility Frames" ) { if ( fireMode == AnimGraphTagEvent.Start ) { // Enable invincibility Log.Info( "I am now invincible!" ); } else if ( fireMode == AnimGraphTagEvent.End ) { // Disable invincibility Log.Info( "I am not invincible anymore..." ); } } }

This example code will make a character invincible during the Invincibility Frames tag, useful for features such as a Dark Souls-Styled Roll mechanic.