Serialization:
- SceneData USTRUCT with Version, SceneName, Timestamp, Actors array
- ActorData: ClassPath, Location, Rotation, Scale per spawned actor
- SceneSerializer: SaveScene/LoadScene/ClearScene/GetSavedSceneNames
- Files stored in Saved/PS_Editor/Scenes/{name}.json
- Uses FJsonObjectConverter for clean USTRUCT-to-JSON conversion
SpawnManager:
- Tracks all spawned actors in SpawnedActors array
- SpawnActorDirect: spawn from class/transform (used by scene loading)
- DestroyAllSpawnedActors: clean scene clear
UI:
- Save field + button in toolbar area
- New Scene button to clear all spawned actors
- Saved scenes list with click-to-load
- Auto-refreshes scene list after save
- Clears selection on load/new
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Spawn System:
- SpawnableComponent: marker component for Blueprint actors (name, category, thumbnail)
- SpawnCatalog DataAsset: lists all spawnable Blueprints with Factory for easy creation
- SpawnManager: loads catalog, spawns actors in front of camera, ensures Movable mobility
- Reads metadata from Blueprint component templates (no temp spawn needed)
Catalogue UI:
- Left panel with scrollable list grouped by category
- Thumbnail cards (80x80) with name below, click to spawn
- "Capture All Thumbnails" button on DataAsset: auto-generates from UE thumbnails
Undo/Redo improvements:
- SpawnAction: undo hides spawned actor, redo shows it
- Delete confirmation dialog (Yes/No) before soft-delete
- Undo/redo auto-deselects hidden actors and refreshes gizmo
- Proper cleanup of hidden actors when actions pruned from stack
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Undo/Redo:
- Custom runtime UndoManager (UE transaction system is editor-only)
- Ctrl+Z / Ctrl+Y hotkeys, action stack with 50 history limit
- Records: gizmo translate/rotate/scale, snap to ground, UI edits
- Soft-delete on Delete key (hide actor, undo restores it)
- Gizmo follows restored position on undo/redo
UI:
- Properties panel (right side): editable Location/Rotation/Scale fields
- Real-time updates during gizmo drag, manual input with Enter to apply
- Toolbar: Translate(E)/Rotate(R)/Scale(T) buttons + Snap Ground
- Mode indicator in title bar, updated help text with all shortcuts
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- End key snaps selected actors to ground (downward trace + bounds offset)
- Rotate/Scale now use screen-space mouse delta (X+Y combined) for intuitive control
- Accumulator-based drag for smooth incremental rotation and scaling
- Fixed rotation drag plane (perpendicular to axis instead of parallel)
- Movement: arrows + A (up) / Q (down), letter keys freed for hotkeys
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- E/R/T hotkeys to switch Translate/Rotate/Scale modes
- Rotate: drag gizmo axis to rotate selection around that axis
- Scale: drag gizmo axis to scale selection on that axis
- Delete key to destroy selected actors
- Movement keys: arrows only + A (up) / Q (down)
- Removed ZQSD movement to free letter keys for hotkeys
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Click+drag on gizmo arrows to translate selected actors along axis
- Drag plane computation based on axis direction and camera orientation
- Axis-constrained movement with initial transform preservation
- Hover highlighting: gizmo arrows turn yellow on mouse-over
- Sphere sweep for easier gizmo clicking (generous hit radius)
- UE editor-style gizmo colors (dark red/green/blue)
- Fixed gizmo visibility toggle (component-level instead of actor-level)
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
- Click-to-select with raycast (Movable actors only)
- Ctrl+click for multi-select, click empty to deselect
- Click vs drag detection (pixel threshold) to avoid accidental selection
- SelectionManager owned by PlayerController with OnSelectionChanged delegate
- Custom depth stencil toggling on selected actors
- Debug bounding box visualization for selection
- Custom translate gizmo actor with colored arrows (R/G/B) and cone tips
- Gizmo renders on top of scene (SDPG_Foreground + Translucent depth test disabled)
- Constant screen-size gizmo scaling based on camera distance
- Unlit gizmo material with Color vector parameter (M_PS_Editor_Gizmo)
- r.CustomDepth=3 enabled for future outline post-process
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
Runtime editor plugin with UE viewport-style camera controls:
- ZQSD/Arrows movement (always active), E/A for up/down
- LMB: pan (horizontal move + yaw), RMB: free fly look
- Alt+LMB / MMB: orbit around focal point, scroll: zoom
- HUD with controls help, cursor auto-hide during camera ops
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
