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Documentation improvements:
1. Added reference to doc/SEQUENCE.md in README
2. Added comment in parser pointing to format spec
3. Updated README with complete format examples including:
- Priority modifiers (+, =, -)
- Time notation (beats vs seconds)
- Optional sequence names
- BPM declaration
New feature task (Phase 1):
Task 1.2b: Priority Editing UI (HIGH PRIORITY, 6-8h)
- Edit sequence priority (0-9 for scene, 10+ for post-processing)
- Toggle effect priority modifiers (+/=/-)
- Visual priority indicators and z-order visualization
- Computed priority display
- Priority conflict warnings
Implementation details:
- Radio buttons for priority modifiers
- Up/down buttons for sequence priority
- Color-coded priority levels
- Priority badges on timeline items
- Automatic priority recalculation
Rationale:
Priority control is essential for proper render order and z-stacking.
Currently, priorities are shown but not easily editable. This task
makes priority a first-class editable property.
Updated effort estimates:
- Phase 1: 28-36 hours (was 22-28)
- Total: ~117-161 hours for full feature set
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Fixed critical parsing bugs that prevented loading real demo.seq files.
Issues fixed:
1. Beat notation support: Parse '0b', '4b' as beats and convert to seconds
- Added BPM parsing from '# BPM 120' comments
- Helper function: parseTime() converts beats to seconds using BPM
2. Priority modifiers: Handle '+', '=', '-' modifiers correctly
- '+' increments priority
- '=' keeps same priority
- '-' decrements priority (for background effects)
- Store both absolute priority and modifier for round-trip
3. Inline comments: Strip comments from end of lines with '#'
- Effect lines like 'EFFECT + FlashEffect 0.0 1.0 # comment' now parse
4. Sequence names: Parse optional sequence names in quotes
- Format: SEQUENCE <time> <priority> "name" [end]
5. Updated serializer: Output correct format with modifiers
- Generate 'EFFECT + ClassName ...' instead of 'EFFECT ClassName ... priority'
- Preserve BPM comment in output
- Preserve sequence names
Parser now correctly handles:
- SEQUENCE 0b 0 → Start at beat 0, priority 0
- SEQUENCE 4b 0 → Start at beat 4 (2 seconds @ 120 BPM)
- EFFECT - FlashCubeEffect .2 3 → Background effect (priority -1)
- EFFECT + FlashEffect 0.0 1. → Normal effect (priority 0)
- EFFECT = GaussianBlur 0 8 → Same priority as previous
Testing: Load assets/demo.seq should now work correctly.
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Created a functional web-based timeline editor for demo.seq files.
Features implemented:
✅ Load/save demo.seq files via browser file API
✅ Visual Gantt-style timeline with time markers
✅ Drag & drop sequences and effects along timeline
✅ Properties panel for editing timing, priorities, arguments
✅ Zoom controls (10% - 200%)
✅ Add/delete sequences and effects
✅ Real-time statistics (sequence count, effect count, duration)
✅ Dark theme matching VSCode aesthetic
✅ Color-coded items (sequences blue, effects gray)
✅ Selection highlighting
Technical details:
- Pure HTML/CSS/JavaScript (no dependencies, no build step)
- ~600 lines in single self-contained HTML file
- Works offline, no backend needed
- Parser converts demo.seq text → JavaScript objects
- Serializer converts JavaScript objects → demo.seq text
Usage:
1. Open tools/timeline_editor/index.html in browser
2. Load assets/demo.seq
3. Drag items, edit properties
4. Save modified file
5. Copy to assets/demo.seq and rebuild
Limitations (acceptable for v1):
- No undo/redo yet
- No effect creation UI (must use properties panel)
- No overlap detection warnings
- No snap-to-grid
- No preview rendering (intentional - editor only)
This provides a quick way to experiment with demo timing without
recompiling, and better visualization of sequence/effect relationships.
Size: ~25KB (HTML + embedded JS/CSS)
Status: Task #57 basic implementation complete
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