Reference for animation tree node types, parameters, and graph pins. For how to open and edit trees, see the Animation Tree Editor guide.

Pin sides: left = flow input, right = flow output(s), top = value/reference input, bottom = value output. Value wiring is provider value to consumer top pin. The canvas below shows all four sides on an ANIM_Selector: its trigger arrives on the left from the tree root's NODES output, an ANIM_Parameter's bottom value pin feeds ParameterBinding on the top, and each wired State_xx on the right leads to an ANIM_Animation leaf with its own top Callback and bottom value pins. Node headers are coloured by group: green for playback leaves and the tree root, blue for parameter and property providers, pale green for selectors, orange for parametrics, lilac for additive blends, purple for ANIM_Callback, red for ANIM_Metadata_Event_Listener, dark purple for the bilinear nodes and white for the rest.

An animation tree on the graph canvas: a selector node receives its trigger on the left from the tree root, a parameter node feeds its ParameterBinding pin on the top, and its State outputs on the right run to animation leaves whose value pins sit on the bottom.

A selector on the canvas (selected, hence the orange outline): left trigger from the root, top ParameterBinding from a parameter node, right State_01 and State_02 outputs to two animation leaves.

Root

Tree root node present in every animation tree.

ANIM_Tree_Top_Level

Root of an animation tree. Created with the tree - not available from the Add Node menu, which otherwise lists every type in this reference alphabetically. Right-click empty canvas to open it, as shown below.

Add Node lists every other type in this reference; the tree root is the one type it never offers.

Pins:

NODES flow output (right) -> child trigger

Parameters:

Name variable: String
Set variable: String
TreeEaseInTime variable: float default: 0.25
RemoveMotionExtractionOnEaseOut variable: bool
RemoveMotionExtractionOnPreceding variable: bool
NeverUseMotionExtraction variable: bool
AllowFootIkIfPrimary variable: bool
AllowHipLeanIkIfPrimary variable: bool
GaitSyncOnStart variable: bool
UseLinearBlend variable: bool
MinInitialPlayspeed variable: float
MaxInitialPlayspeed variable: float

Playback

Leaf nodes that play animation clips.

ANIM_Animation

Plays a single named animation clip. Selecting one on the canvas fills the Node Properties panel with the parameters listed below; the panel caption gives the node name and type.

The Node Properties panel for an ANIM_Animation node, listing Name, AnimationName, Looping, Mirrored, Mask and the converge and time-offset fields.

Node Properties for an ANIM_Animation leaf - the rows are this section's Parameters; the Callback link is a pin on the canvas, not a row.

Pins:

trigger flow input (left)
Callback value input (top)
value value output (bottom)

Parameters:

Name variable: String
AnimationName variable: String
Looping variable: bool
Mirrored variable: bool
Mask variable: BoneMaskGroups
ConvergeOrientation variable: bool
ConvergeTranslation variable: bool
NotifyTimeOffset variable: float
StartTimeOffset variable: float
EndTimeOffset variable: float

ANIM_Randomised_Animation

Picks from a weighted pool of up to 8 animation entries.

Each pool entry exposes AnimationName, Mirrored, Weight, LoopsBeforeReselection, and time offsets, edited by expanding AnimationPool in the Node Properties panel, as shown below; the panel lists all 8 slots, and a collapsed slot shows its clip name. Empty AnimationName slots are skipped on save.

The Node Properties panel for an ANIM_Randomised_Animation node with its AnimationPool expanded to show two weighted animation entries.

AnimationPool on a randomised leaf: each of the 8 slots carries its own clip name, weight and offsets. Here slots 0 and 1 play the same clip, the second mirrored and weighted higher.

Pins:

trigger flow input (left)
Callback value input (top)
RandomCallback value input (top)

Parameters:

Name variable: String
Looping variable: bool
NewSelectionOnLoop variable: bool
BlendTime variable: float
ConvergeOrientation variable: bool
ConvergeTranslation variable: bool
AnimationPool variable: Animation[8]

Parameters & Properties

Parameter and property providers / listeners.

ANIM_Parameter

Exposes a typed parameter value for other nodes to bind to.

Pins:

value value output (bottom)

Parameters:

Name variable: String
ParameterType variable: AnimTreeParameterType

ANIM_AutoFloatParameter

Auto float parameter node.

Pins:

value value output (bottom)

Parameters:

Name variable: String

ANIM_FloatInterpolator

Interpolates toward a source parameter at a fixed rate.

Pins:

SourceParameter value input (top)
value value output (bottom)

Parameters:

Name variable: String
InitialValue variable: float
UnitsPerSecond variable: float

ANIM_Property

Holds animation metadata / property value data.

Pins:

value value output (bottom)

Parameters:

Name variable: String
Value variable: AnimationMetadataValue

ANIM_Property_Listener

Listens to a named anim property on a linked leaf.

Pins:

LeafNode value input (top)

Parameters:

Name variable: String
AnimProperty variable: String default: linear_velocity

Callbacks & Events

Callback providers and metadata event listeners.

ANIM_Callback

Callback provider node.

Pins:

value value output (bottom)

Parameters:

Name variable: String

ANIM_Event_Callback

Event callback provider node.

Pins:

value value output (bottom)

Parameters:

Name variable: String

ANIM_Metadata_Event_Listener

Listens for a metadata event by name.

Pins:

trigger flow input (left)

Parameters:

Name variable: String
EventName variable: String
WeightThreshold variable: float
FilterTime variable: float

Selectors

Nodes that choose among child branches.

ANIM_Selector

Selects among up to 16 child states by discrete parameter value.

Each state has Value (uint), FootSyncOnSelect, and a linked child Node (via pin). Expand States in the Node Properties panel to edit the values, as shown below. The entries are numbered from 0 there, so [0] is pin State_01, and each state's child is whatever is wired to that State_xx output on the canvas.

The Node Properties panel for an ANIM_Selector node with its States array expanded, each state showing a Value and FootSyncOnSelect field.

States on an ANIM_Selector: all 16 entries are listed, the first three expanded here; a collapsed entry shows its Value.

Pins:

trigger flow input (left)
ParameterBinding value input (top)
State_01 flow output (right)
State_02 flow output (right)
State_03 flow output (right)
State_04 flow output (right)
State_05 flow output (right)
State_06 flow output (right)
State_07 flow output (right)
State_08 flow output (right)
State_09 flow output (right)
State_10 flow output (right)
State_11 flow output (right)
State_12 flow output (right)
State_13 flow output (right)
State_14 flow output (right)
State_15 flow output (right)
State_16 flow output (right)

Parameters:

Name variable: String
EaseSelectionTime variable: float
ResetPlaybackOnChangeSelection variable: bool
States variable: SelectorState[16]

ANIM_Enumerated_Selector

Enumerated selector - same structure as ANIM_Selector with a different node type id.

Pins:

trigger flow input (left)
ParameterBinding value input (top)
State_01 flow output (right)
State_02 flow output (right)
State_03 flow output (right)
State_04 flow output (right)
State_05 flow output (right)
State_06 flow output (right)
State_07 flow output (right)
State_08 flow output (right)
State_09 flow output (right)
State_10 flow output (right)
State_11 flow output (right)
State_12 flow output (right)
State_13 flow output (right)
State_14 flow output (right)
State_15 flow output (right)
State_16 flow output (right)

Parameters:

Name variable: String
EaseSelectionTime variable: float
ResetPlaybackOnChangeSelection variable: bool
States variable: SelectorState[16]

ANIM_Ranged_Selector

Selects among up to 8 child states by float parameter range.

Each state has Min, Max, FootSyncOnSelect, and a linked child Node.

Pins:

trigger flow input (left)
ParameterBinding value input (top)
State_01 flow output (right)
State_02 flow output (right)
State_03 flow output (right)
State_04 flow output (right)
State_05 flow output (right)
State_06 flow output (right)
State_07 flow output (right)
State_08 flow output (right)

Parameters:

Name variable: String
EaseSelectionTime variable: float
ResetPlaybackOnChange variable: bool
States variable: RangedSelectorState[8]

ANIM_Foot_Sync_Selector

Chooses left or right foot-strike child for gait sync.

Pins:

trigger flow input (left)
LeftStrikeChild flow output (right)
RightStrikeChild flow output (right)

Parameters:

Name variable: String
StrikeSelectionMethod variable: FootStrikeSelectionMethod
GaitSyncTargetOnSelect variable: bool

Parametrics

Parameter-driven blend nodes.

ANIM_Parametric

1D parametric blend across up to 16 states.

Each state has a float Value and linked child Node.

Pins:

trigger flow input (left)
ParameterBinding value input (top)
State_01 flow output (right)
State_02 flow output (right)
State_03 flow output (right)
State_04 flow output (right)
State_05 flow output (right)
State_06 flow output (right)
State_07 flow output (right)
State_08 flow output (right)
State_09 flow output (right)
State_10 flow output (right)
State_11 flow output (right)
State_12 flow output (right)
State_13 flow output (right)
State_14 flow output (right)
State_15 flow output (right)
State_16 flow output (right)

Parameters:

Name variable: String
ParameterMin variable: float
ParameterMax variable: float
ParameterUsage variable: ParameterBlendUsage
BlendProperty variable: String
SyncDurations variable: bool
ExtractBlendPropertiesAutomatically variable: bool
States variable: ParametricState[16]

ANIM_2DParametric

2D parametric blend set.

Pins:

trigger flow input (left)
ParameterBindingX value input (top)
ParameterBindingY value input (top)
OverflowCallback value input (top)
value value output (bottom)

Parameters:

Name variable: String
BlendSet variable: String
SyncBlendSet variable: bool
LoopBlendSet variable: bool

ANIM_3DParametric

3D parametric blend set (extends 2D with a Z binding).

Pins:

trigger flow input (left)
ParameterBindingX value input (top)
ParameterBindingY value input (top)
ParameterBindingZ value input (top)
OverflowCallback value input (top)
value value output (bottom)

Parameters:

Name variable: String
BlendSet variable: String
SyncBlendSet variable: bool
LoopBlendSet variable: bool

ANIM_4DParametric

4D parametric blend set. Graph currently exposes a flow trigger only; additional bindings exist on the data model.

Pins:

trigger flow input (left)

Parameters:

Name variable: String
BlendSet variable: String
ExtraBlendSet variable: String
SyncBlendSet variable: bool
LoopBlendSet variable: bool

Blends

Additive and parametric additive blends.

ANIM_Additive_Blend

Additive blend of a base and additive child.

Pins:

trigger flow input (left)
base_node flow output (right)
additive_node flow output (right)

Parameters:

Name variable: String
AdditiveNodeWeight variable: float
SyncAdditiveDurationToBase variable: bool

ANIM_Parametric_Additive_Blend

Additive blend with weight driven by a parameter.

Pins:

trigger flow input (left)
WeightControlParameter value input (top)
base_node flow output (right)
additive_node flow output (right)

Parameters:

Name variable: String
AdditiveNodeWeight variable: float
ParameterMin variable: float
ParameterMax variable: float
SyncAdditiveDurationToBase variable: bool

Structural & Misc

Masks, IK, weighting, and stub / specialised types.

ANIM_Bone_Mask

Applies a bone mask to preceding / following / self layers.

Pins:

trigger flow input (left)

Parameters:

Name variable: String
Mask variable: BoneMaskGroups
MaskPrecedingLayers variable: bool
MaskFollowingLayers variable: bool
MaskSelf variable: bool

ANIM_IK

Inverse kinematics node.

Pins:

trigger flow input (left)
IkEffector value input (top)

Parameters:

Name variable: String
PoseLayer variable: PoseLayer
IkType variable: IkSolverType
Target variable: IkControlTarget
EffectorFullyEffectiveRadius variable: float
EffectorLeastEffectiveRadius variable: float
FalloffRate variable: float
EnforceTranslation variable: bool
EnforceEndBoneRotation variable: bool

ANIM_Weighted

Weights a single child by a parameter range.

Pins:

trigger flow input (left)
Parameter value input (top)
child flow output (right)

Parameters:

Name variable: String
ParameterMin variable: float
ParameterMax variable: float

ANIM_Bilinear_High_Fidelity

Bilinear high-fidelity node.

Pins:

trigger flow input (left)

Parameters:

Name variable: String

ANIM_Bilinear_Low_Fidelity

Bilinear low-fidelity node.

Pins:

trigger flow input (left)

Parameters:

Name variable: String

ANIM_Spherical

Spherical blend node.

Pins:

trigger flow input (left)

Parameters:

Name variable: String