AnimEvents, AnimGraph Tags, Attachments

<title>AnimEvents, AnimGraph Tags, Attachments</title>
<cat>Model.Animation</cat>

##What are AnimEvents?
[AnimEvents](AnimEvents,_AnimGraph_Tags,_and_Attachments#animevents) are used in **ModelDoc** as a way to make something happen during a specific frame of a **Simple Animation**, most commonly used to:

* [Play **Sounds**](AnimEvents,_AnimGraph_Tags,_and_Attachments#soundevents)
* [Create **Particles**](AnimEvents,_AnimGraph_Tags,_and_Attachments#particleevents)
* [Switch **Bodygroups**](AnimEvents,_AnimGraph_Tags,_and_Attachments#bodygroupevents)
* [Add dynamic **Foot Steps**](AnimEvents,_AnimGraph_Tags,_and_Attachments#footstepevents)
* [Run **Code** in your game](AnimEvents,_AnimGraph_Tags,_and_Attachments#runcodewithgenericevents)

##What are AnimGraph Tags?
[Animgraph Tags](AnimEvents,_AnimGraph_Tags,_and_Attachments#animgraphtags) 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:

* [Be a **Condition** in State Machines](AnimEvents,_AnimGraph_Tags,_and_Attachments#tagconditioninastatemachine)
* [Run **Code** in your game](AnimEvents,_AnimGraph_Tags,_and_Attachments#runcodewithtags)

#Attachments
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 <key>✙Add</key>, add an `Attachment` and name it.
	
	2. Select which **Bone** will be its parent, this is the bone it will follow.
<note>You can select "*None*", this will instead use the origin of the model.</note>

	3. Position the attachment *(you can use the various gizmos in the top left to aid you).*
<upload src="a4aaf/8dad9599234e029.png" size="5436" name="image.png" />
This should be the final result *(**mouth** is the attachment)*:
<upload src="a4aaf/8dad959bd99e5e1.png" size="393942" name="image.png" />
<note>The `RED` arrow indicates forward, while the **BLUE** arrow is up, make sure they are correct by rotating the attachment in the node itself.</note>

#AnimEvents
To add an AnimEvent *Right Click* a **Simple Animation** node, and select `Add AnimEvent...`
<upload src="a4aaf/8dad95ae2a41f94.png" size="10534" name="image.png" />
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.
<upload src="a4aaf/8dad95c17bb6b3d.png" size="10543" name="image.png" />

##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:
<upload src="a4aaf/8dad95f1e288bae.mp4" size="455634" name="soundevent.mp4" />

##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:
<upload src="a4aaf/8dad96310b58a8b.mp4" size="205392" name="Particles.mp4" />

##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:
<upload src="a4aaf/8dad9663b70d0fe.mp4" size="456501" name="bodygroups.mp4" />

##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)*.
```csharp
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

```csharp
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 <key>✙</key> and select `Internal Tag`, name it accordingly.

Then, to set the Tag inside your Animation Clips:

2. Double Click an **Animation Clip** to enter it.
3. Press <key>✙</key> and select your **Tag**
4. Slide the Tag's start and end for the desired duration
<upload src="a4aaf/8dad9717d3aab38.png" size="477051" name="image.png" />
`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**
<upload src="a4aaf/8dad9726e8884fc.png" size="80857" name="image.png" />
`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:
```csharp
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.

AnimEvents, AnimGraph Tags, Attachments

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