TransitionFX v1.1.0

Added

Built-in Effects (+3, total 25)

• Sliding Doors — Two panels slide from opposite sides and meet at the center, like elevator or airlock doors
• Dissolve — Classic transition where the screen dissolves like mist or sand using procedural noise
• Corner Wipe — A directional wipe that starts from a specified corner and expands diagonally across the entire screen; origin corner (0–3) is dynamically selectable

Material Functions

• MF_StarSDF — Star signed-distance-field material function for star-shaped effects

Event System

• OnTransitionProgressChanged — Broadcasts the eased progress value (0.0 to 1.0) each tick while a transition is active
• OnProgressThresholdReached — Fires once when the eased progress crosses a registered threshold value

C++ / Blueprint API

• AddProgressThreshold(float Threshold) — Registers a progress threshold (0.0 to 1.0) for one-shot callback notification
• ClearProgressThresholds() — Removes all registered progress thresholds

Changed

• Optimized FString allocation in STransitionPreviewPanel by reserving capacity before PascalCase-to-snake_case conversion loop

Documentation

• Added UEFN (Unreal Editor for Fortnite) compatibility FAQ to README (EN/JP)
• Updated API Reference (EN/JP) with OnTransitionProgressChanged, OnProgressThresholdReached, AddProgressThreshold, and ClearProgressThresholds
• Updated Quick Start guides (EN/JP) with new event system documentation (5 delegates)
• Added effect preview GIFs for Dissolve, Sliding Doors, and Corner Wipe
• Added Corner Wipe to the Built-in Effects table in README (EN/JP)
• Marked "OnTransitionProgress Delegate" as completed in the Roadmap

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TransitionFX v1.0.0

Added

Core System

• UTransitionManagerSubsystem — GameInstance subsystem managing the full transition lifecycle
• UTransitionPreset — Data asset for configuring transition effects (duration, easing, audio, material, input blocking)
• ITransitionEffect — Interface for implementing custom transition effects
• UPostProcessTransitionEffect — Concrete post-process volume based transition effect
• UTransitionBlueprintLibrary — Blueprint function library with latent action support

Built-in Transition Effects (22 effects)

• Fade, Iris, Flower Iris, Diamond, Box
• Linear Wipe, Split, Wavy Curtain, Radial Wipe, Cross Wipe
• Tiles, Polka Dots, Blinds, Spiral, Random Tiles, Wind
• Texture Mask, TV Switch Off, Hexagon, Triangle, Checkerboard, Pixelate

Easing System

• Linear, Sine (In/Out/InOut), Cubic (In/Out/InOut), Expo (In/Out/InOut)
• Elastic Out, Bounce Out
• Custom FloatCurve support

Blueprint API

• PlayTransitionAndWait — Latent action node (Forward / Reverse exec pins)
• PlayRandomTransitionAndWait — Randomly selects a preset from an array
• PlayTransitionAndWaitWithDuration — Duration override at call site
• QuickFadeToBlack / QuickFadeFromBlack — Convenience single-node fades
• InvertTransition — Inverts the transition mask and replays forward
• StopTransition, ForceClear, ReverseTransition, SetPlaySpeed, ReleaseHold
• IsAnyTransitionPlaying, IsTransitionPlaying, GetCurrentProgress, IsCurrentTransitionFinished
• PrepareAutoReverseTransition — Pre-configures auto-reverse for the next level load without starting a transition
• OpenLevelWithTransition, OpenLevelWithTransitionAndWait — Level transition nodes with auto fade-in
• ApplyEasing — Pure math node for easing calculations

C++ API

• StartTransition with FTransitionParameters for runtime material parameter overrides
• PreloadTransitionPresets — Synchronous shader warmup to prevent first-frame hitching
• AsyncLoadTransitionPresets — Async asset loading with automatic shader warmup and completion callback
• OpenLevelWithTransition — Seamless level transitions with auto-reverse fade-in
• InvertTransition — Inverts the current transition mask and replays forward
• ReleaseHold — Releases held transitions for loading screen workflows
• PrepareAutoReverseTransition — Pre-configures auto-reverse for the next level load without starting a transition immediately
• GetDefaultFadePreset — Returns the cached default fade preset (DA_FadeToBlack)
• Object pooling for transition effect instances (capped at 3 per class)
• TransitionFX.ForceClear console command for emergency recovery

Event System

• OnTransitionStarted — Fired when transition begins
• OnTransitionCompleted — Fired when transition finishes
• OnTransitionHoldStarted — Fired when transition reaches max and holds

Editor Module

• TransitionFXEditor module — Editor extension for previewing and exporting transition effects
• STransitionPreviewPanel — Real-time preview panel with playback controls (play, pause, loop, reverse, speed adjustment)
• TransitionPreviewViewport — Dedicated viewport for effect preview rendering
• FGifEncoder — GIF89a encoder with LZW compression and median-cut color quantization
• AssetTypeActions_TransitionPreset — Content browser integration with custom icon and color
• TransitionPresetFactory — Asset factory for creating new transition presets
• Batch export for all effects and all easing types as GIF files
• Resolution options for capture (480×270, 640×360, 800×450)

Other Features

• Auto input blocking via SetCinematicMode during transitions
• Pause-aware ticking (bTickWhenPaused)
• Hold-at-max support for loading screen workflows
• Audio SFX synchronization with volume and pitch control
• Aspect ratio correction for all SDF-based effects
• Soft object reference support for on-demand asset loading

Documentation

• README in English and Japanese
• API Reference in English and Japanese (API_Reference_EN.md, API_Reference_JP.md)
• Quick Start Guide in English and Japanese (QUICKSTART_EN.md, QUICKSTART_JP.md)
• Performance rationale document (PERFORMANCE_RATIONALE.md)
• FAQ in English and Japanese (FAQ_EN.md, FAQ_JP.md)
• Contributing guidelines (CONTRIBUTING.md)
• Preview Tool Manual (TransitionFX_PreviewTool_Manual.md)