- Tab headers for dynamically-opened sub-graphs now include a close
button (×). The initial AnimGraph tab is not closable.
- TabControl uses a custom template with horizontal ScrollViewer to
keep all tabs in a single line instead of wrapping.
- Long tab names are truncated with ellipsis (MaxWidth=200).
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
PrefixStateMachineLayerNames and BuildStateMachineOverviewLayers only
scanned vm.Layers for StateMachine nodes, missing nested SM nodes in
vm.StateSubGraphs. This caused overview layers for nested SMs to be
named incorrectly (e.g. "AnimGraph > NestedSM" instead of
"AnimGraph > OuterSM > StateName > NestedSM"), so double-click from
a state sub-graph could not find the matching overview layer.
Fix: iteratively discover nested SM nodes in state sub-graphs and
also scan StateSubGraphs in BuildStateMachineOverviewLayers.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
The perpendicular vector was being computed per-connection from its own
direction. For B→A connections the perp flipped vs A→B, and when multiplied
by the negative perpSide the offsets cancelled out — both lines landed on
the same position.
Now a stable perpendicular is computed once from the canonical pair direction
(nodeA→nodeB centers) and passed to DrawConnectionLine, so perpSide=+1/-1
correctly separates them to opposite sides.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
- Add StateSubGraphs dictionary to AnimGraphViewModel keyed by root node property name
- BuildLayers Pass 2 now stores _StateResult sub-graphs in StateSubGraphs via AddStateSubGraph
- PrefixStateMachineLayerNames iterates StateSubGraphs instead of Layers for renaming
- BuildStateMachineOverviewLayers no longer removes from Layers (sub-graphs are separate)
- AnimGraphViewer uses StateSubGraphs.TryGetValue for direct dictionary lookup by node index
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
Split BuildLayers into two distinct passes:
- Pass 1: AnimGraphNode_Root nodes → graph layers
- Pass 2: AnimGraphNode_StateResult nodes → state sub-graphs
Previously these were incorrectly mixed in a single loop. Each type
defines a fundamentally different concept in UE and must be processed
independently. Extracted CollectUpstream helper to share BFS logic.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
Instead of using connected components (undirected BFS), BuildLayers now
groups nodes by their defining root nodes. Each AnimGraphNode_Root defines
an animation blueprint layer and each AnimGraphNode_StateResult defines a
state machine state sub-graph. For each root, we trace upstream through
directed connections to collect all nodes that feed into it.
Remaining unassigned nodes fall back to connected-component grouping.
Extracted AddLayer helper to reduce duplication.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
GetLayerName now distinguishes animation blueprint layers (_Root nodes,
found by Name property) from state machine state sub-graphs (_StateResult
nodes, found by unique property name from StateRootNodeIndex). This avoids
duplicate name collisions when multiple states share the same display name.
PrefixStateMachineLayerNames resolves the _StateResult node's Name
additional property for the display portion of path-prefixed names.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
- StateMachineMetadata: store root node property names per state via StateRootPropNames
- AssociateStateMachineNames: capture root prop name from StateRootNodeIndex
- BuildStateMachineOverviewLayers: store StateRootNodeName on overview state nodes
- TryOpenSubGraph: find per-state layer by root node reference, not name path
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
Parse States and Transitions from BakedStateMachines to build state-level
overview layers for each state machine. Each overview shows:
- Entry node (filled circle) connecting to the initial state
- State nodes (rounded rectangles) with their names
- Directional transition arrows between states
The overview layer replaces the old internal per-state layer and is opened
via double-click on StateMachine nodes in the parent graph.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
StateMachine internal layer tabs are now named with a parent path
(e.g., "AnimGraph > Locomotion") to avoid collisions when a state
machine shares a name with a LinkedAnimLayer layer.
PrefixStateMachineLayerNames runs after BuildLayers to find each SM
node's parent layer and prepend its name. TryOpenSubGraph constructs
the same path for lookup. The path separator is a shared constant.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
Read BakedStateMachines from the animation blueprint class to extract
machine names. Associate FAnimNode_StateMachine nodes with their machine
name via StateMachineIndexInClass, and mark internal state root nodes
with BelongsToStateMachine for correct layer naming.
Extend TryOpenSubGraph to handle both LinkedAnimLayer and StateMachine
node types for double-click tab navigation.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
Generalized GetLayerName to use any Root node's "Name" property as the
layer name (not just "AnimGraph"), enabling proper naming for
LinkedAnimLayer sub-graphs.
Added double-click handling on nodes: double-clicking a LinkedAnimLayer
node finds the matching layer and opens/selects a tab for it.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
TryResolvePoseLink only handled direct struct properties (single
FPoseLink). Many animation nodes use arrays of pose links (e.g.,
BlendPose TArray<FPoseLink> in blend list nodes). Added handling for
UScriptArray to iterate array elements and resolve each as a pose link.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
FPropertyTagType.ToString() returns "Value (TypeName)" format, including
extra type information. Using GenericValue?.ToString() returns just the
raw value, which fixes property value extraction and root node detection.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
The root node's meaningful identifier "AnimGraph" is stored in the
struct's "Name" property (AdditionalProperties["Name"]), not the
node's generated Name field (e.g. "AnimGraphNode_Root_0").
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
The output pose layer is now correctly identified by finding the node
whose Name property is "AnimGraph" (stored on AnimGraphNode_Root),
instead of incorrectly matching any node with "Root" in ExportType.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
Only the AnimGraph layer (containing Root/Result nodes) is shown
when first opening the animation blueprint, instead of all layer tabs.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
- Dark translucent node body with gradient title bar color-coded by type
- Proper pin circles (Ellipses) on node edges replacing text bullets
- Connection wires colored by source pin type with thicker strokes
- Subtle drop shadow behind each node
- Orange selection highlight matching UE's selection color
- Darker canvas background matching UE blueprint editor
- Extract named constants for pin label offset and gradient factor
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
The previous fix (e.OriginalSource != sender) blocked panning entirely
when clicking on nodes, making them feel like buttons. Connection Path
elements also received mouse events, potentially interfering.
Fix:
- Use a drag-threshold mechanism: clicking selects a node without
jumping, dragging from anywhere (including nodes) starts panning
after a 5px threshold is exceeded.
- Register MouseLeftButtonDown with AddHandler(handledEventsToo: true)
so the panning handler fires even when nodes set e.Handled = true.
- Set IsHitTestVisible = false on connection Path elements so they
don't interfere with mouse events.
- Check e.LeftButton state in OnCanvasMouseMove to prevent stale pan
state when the button is released unexpectedly.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
In WPF, MouseLeftButtonDown is a Direct routed event that fires
independently on each UIElement with a fresh Handled=false. Setting
e.Handled=true in the node's click handler does NOT prevent
OnCanvasMouseDown on the parent canvasBorder from firing. This caused
clicking a node to both select it AND start panning, making the graph
jump when the mouse moved.
Fix: check e.OriginalSource != sender in OnCanvasMouseDown so panning
only starts when clicking directly on the canvas background.
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
- Fix OnMouseWheel: get mouse position relative to parent Border (stable
coords) instead of Canvas (transformed coords that shift during zoom);
compute canvas-local point manually and preserve it after scale change
- Fix OnCanvasMouseDown/Move: use parent Border coords for consistent
panning behavior
- Improve connection lines: thicker stroke (2px), higher opacity (0.8),
minimum bezier tangent length (50px) for smoother short-distance curves
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
- AnimGraphViewModel: Add AnimGraphLayer class and BuildLayers() to group
nodes into connected subgraphs displayed as separate tabs
- AnimGraphViewModel: Add topological layout (LayoutLayerNodes) so nodes
flow left-to-right by dependency depth instead of grid
- AnimGraphViewer.xaml: Replace single canvas with TabControl for layers
and a right-side properties panel with GridSplitter
- AnimGraphViewer.xaml.cs: Per-layer canvas state, node selection with
property panel population, per-tab zoom/pan
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
In cooked UE assets, UEdGraphNode objects are stripped as editor-only data
(PKG_FilterEditorOnly). The actual animation node information is stored in:
- UAnimBlueprintGeneratedClass.ChildProperties (FStructProperty entries describing node types)
- ClassDefaultObject properties (FStructFallback values with node data)
- FPoseLink/FComponentSpacePoseLink structs with LinkID for connections
Co-authored-by: LoogLong <86428208+LoogLong@users.noreply.github.com>
