# Impakt -- Project Status **Date:** 2026-04-10 **Version:** 0.1.0 **Tests:** 136 passing, 0 warnings **Source:** ~6,900 lines Python | ~1,600 lines tests | ~190 lines HTML templates **Tooling:** uv (Python 3.12.12), hatchling build backend --- ## Quick Start ```bash cd /Users/noise/Code/impakt uv sync --dev # install all dependencies uv run pytest tests/ # run all 136 tests uv run impakt info tests/mme_data/3239 # show test metadata uv run impakt serve tests/mme_data/3239 # launch web UI on :8050 ``` Scripting: ```python from impakt import Session s = Session.open("tests/mme_data/3239") s.plot("11HEAD0000H3ACXP", "11HEAD0000H3ACYP", "11HEAD0000H3ACZP", cfc=1000) ``` --- ## Repository Layout ``` impakt/ pyproject.toml # PEP 621 + uv dependency-groups uv.lock # lockfile README.md # Architecture docs with 16 Mermaid diagrams BRAINSTORM.md # 80+ feature ideas docs/ STATUS.md # <-- you are here src/impakt/ __init__.py # exports Session, Template channel/ # Data model layer code.py # ISO channel code parser (14-char + 16-char) model.py # Channel, ChannelGroup, TestData, TestMetadata group.py # Auto-grouping utilities lookup.py # ISO naming lookup tables (150+ entries) io/ # I/O layer reader.py # ReaderProtocol, ReaderRegistry mme.py # MMEReader (real ISO 13499 + synthetic INI) transform/ # Signal processing base.py # Transform protocol, TransformChain cfc.py # SAE J211 CFC filter (60/180/600/1000) align.py # X-align (time-zero), Y-align (offset) resultant.py # Vector magnitude from X/Y/Z math_expr.py # Free-form math expressions resample.py # Trim, Resample criteria/ # Injury criteria base.py # CriterionResult, InjuryCriterion protocol hic.py # HIC15, HIC36 clip3ms.py # 3ms chest clip nij.py # Nij (4 modes, per-dummy intercepts) chest.py # Chest deflection, Viscous criterion femur.py # Femur load tibia.py # Tibia index protocol/ # Rating protocols base.py # ProtocolResult, BodyRegionScore, Color, Rating euro_ncap.py # Euro NCAP (color/points/stars, versioned) us_ncap.py # US NCAP (injury probability/stars) iihs.py # IIHS (G/A/M/P) plot/ # Visualization engine.py # PlotEngine (Plotly), cursor_values() spec.py # PlotSpec, ChannelRef, Corridor, CursorValues cursor.py # Dual X-cursor logic export.py # PNG/SVG/PDF/HTML export template/ # Templates & sessions model.py # TemplateSpec, SessionState (YAML serializable) library.py # TemplateLibrary (~/.impakt/templates/) session.py # SessionManager (.impakt/ per test) report/ # Report generation engine.py # PDF/HTML via WeasyPrint + Jinja2 templates/ # 3 Jinja2 HTML templates plot_sheet.html injury_summary.html protocol_report.html web/ # Dash web application app.py # create_app(), serve() layout.py # build_layout() -- UI structure callbacks.py # register_callbacks() -- interactivity plugin/ # Plugin system registry.py # PluginRegistry, discovery (entrypoints + dir) script/ # Scripting API + CLI api.py # Session, ChannelHandle, TransformProxy, Template cli.py # argparse CLI (serve/info/channels/evaluate) tests/ conftest.py # Synthetic channel fixtures test_integration.py # Full pipeline against synthetic MME fixture test_real_mme.py # 46 tests against 5 real ISO 13499 datasets test_channel/ # ChannelCode parser, Channel model, TestData test_criteria/ # HIC, Nij test_io/ # MMEReader test_protocol/ # Euro NCAP scoring test_transform/ # CFC filter, alignment fixtures/ generate_mme.py # Synthetic MME generator (26 channels, half-sine) sample_mme/ # Generated synthetic test data mme_data/ # REAL ISO 13499 test data (5 datasets) 3239/ # NHTSA/Calspan, VW Passat frontal, 133 channels AK3T02FO/ # BASt, frontal 40% offset, 97 channels AK3T02SI/ # BASt, side impact, 97 channels VW1FGS15/ # Volkswagen, pedestrian headform, 10 channels 98_7707/ # UTAC, vehicle-to-vehicle (metadata only) *.pdf, *.doc # ISO/TS 13499 reference documents ``` --- ## What Works ### Fully implemented and tested: | Module | Status | Notes | |---|---|---| | **Channel code parser** | Complete | Auto-detects 14-char (no dummy) vs 16-char (with dummy H3/P3/PC). Handles real-world codes from NHTSA, BASt, VW, UTAC. | | **Channel model** | Complete | Immutable channels, auto-grouping X/Y/Z, resultant computation, hierarchical tree builder. | | **MME reader** | Complete | Two-format support: (1) Real ISO 13499 (.mme + .chn index + .NNN data files), (2) simplified INI format. Tested against 5 real datasets. | | **CFC filtering** | Complete | SAE J211 compliant. 4th-order Butterworth, zero-phase (filtfilt). All 4 CFC classes. | | **Alignment transforms** | Complete | X-align (manual/threshold/trigger), Y-align (baseline window). | | **Resultant** | Complete | From ChannelGroup or arbitrary channels. | | **Math expressions** | Complete | Safe eval with numpy functions. | | **HIC** | Complete | HIC15/HIC36, cumulative integration, optimal window search. | | **3ms clip** | Complete | Cumulative exceedance method. | | **Nij** | Complete | 4 modes (NTE/NTF/NCE/NCF), per-dummy intercepts (H3 50M/5F/95M, child dummies). | | **Chest deflection** | Complete | Peak sternal displacement. | | **Viscous criterion** | Complete | V(t)*C(t) with chest depth per dummy type. | | **Femur load** | Complete | Left/right, unit conversion. | | **Tibia index** | Complete | M/Mc + F/Fc with intercepts. | | **Euro NCAP** | Complete | Sliding-scale color/points, percentage to stars. Versioned thresholds. | | **US NCAP** | Complete | Logistic injury risk functions, combined probability, star rating. | | **IIHS** | Complete | G/A/M/P per body region, worst-case overall. | | **Plot engine** | Complete | Plotly rendering, corridors, cursor values, export. | | **Template model** | Complete | YAML serialize/deserialize, library manager, session persistence. | | **Report engine** | Complete | HTML+WeasyPrint PDF, 3 Jinja2 templates. Falls back to HTML if WeasyPrint unavailable. | | **Plugin registry** | Complete | Entry point + directory + API discovery. | | **CLI** | Complete | `impakt serve/info/channels/evaluate`. | | **Web UI** | Minimal | Basic Dash app: flat channel list, single CFC dropdown, cursor inputs. Functional but needs major overhaul. | ### Key design decisions already made: 1. **Immutable channels** -- transforms return new Channel objects; raw data never modified. 2. **`.impakt/` subfolder** -- session state stored alongside test data, not in a central DB. 3. **Template/session split** -- templates are global recipes; sessions are per-test instances with overrides. 4. **Two MME format variants** -- real ISO 13499 and simplified INI. Reader auto-detects. 5. **16-char channel codes** -- positions 11-12 can be dummy type (H3/P3/PC) or measurement type; parser auto-detects. 6. **uv for package management** -- dev deps in `[dependency-groups]`, lockfile committed. --- ## What Needs Building Next: Web UI Overhaul The web UI is the top priority. Current state is a proof-of-concept; needs to become a daily-use tool. The planned features, in priority order: ### Priority 1 -- Must have for the tool to be usable 1. **File/test management** -- open test from UI (path input), open additional tests for overlay, recent tests list, test metadata panel 2. **Proper channel tree** -- collapsible hierarchy (Object > Region > Measurement), select-all per group, preview (peak, unit, rate), color indicators for plotted channels, multi-test awareness 3. **Multi-pane plot layout** -- configurable grid (1x1 through 3x2), drag channels to panes, independent zoom with optional sync, per-pane axis labels 4. **Working criteria panel** -- auto-detect channels from ISO naming, compute all criteria, results table with pass/fail colors, click to highlight time window on plot 5. **Plot export** -- download PNG/SVG/PDF per pane, copy to clipboard, export CSV of plotted data ### Priority 2 -- Makes the tool genuinely productive 6. **Template management UI** -- template browser, apply/save/edit from UI, session auto-save 7. **Enhanced transform controls** -- per-channel CFC, X-align/Y-align controls, one-click resultant 8. **Corridor management** -- load from CSV, draw on plot, corridor library with templates 9. **Channel inspector** -- tabular data view, statistics (min/max/RMS/peak time), peak detection 10. **Math expression builder** -- formula input with autocomplete, variable binding dropdowns, live preview ### Priority 3 -- Differentiators 11. **Annotations** -- text on plots, measurement lines, highlight regions 12. **Comparison mode** -- side-by-side tests, delta plots, synced cursors 13. **Report builder** -- drag-and-drop report composer, PDF preview 14. **Keyboard shortcuts** -- Ctrl+O, Ctrl+S, 1-9 pane switch, F fullscreen, R reset zoom --- ## Test Data Available | Dataset | Lab | Type | Channels | Good for testing | |---|---|---|---|---| | `fixtures/sample_mme/` | Synthetic | Frontal barrier | 26 | Unit tests, known values | | `mme_data/3239/` | NHTSA/Calspan | Frontal barrier (VW Passat) | 133 | Full pipeline, real data, driver+rear passenger | | `mme_data/AK3T02FO/` | BASt | Frontal 40% offset | 97 | Multi-occupant (driver, rear, child) | | `mme_data/AK3T02SI/` | BASt | Side impact | 97 | Side impact protocols | | `mme_data/VW1FGS15/` | Volkswagen | Pedestrian headform | 10 | Impactor codes (D0), pre-computed resultant | | `mme_data/98_7707/` | UTAC | Vehicle-to-vehicle | 0 | Metadata-only, graceful empty handling | --- ## Dependencies Core: numpy, scipy, plotly, dash, dash-bootstrap-components, pandas, pyyaml, jinja2, weasyprint, pydantic Dev: pytest, pytest-cov, ruff, mypy Optional: nptdms (for future TDMS reader plugin) --- ## Known Issues / Technical Debt 1. **VehicleInfo.year parsed as 0** for real MME data (the .mme format doesn't have a vehicle_year field; it's embedded in the vehicle name string like "VOLKSWAGEN PASSAT 2000"). 2. **Speed displayed as raw float** (e.g., 55.900001530350906 km/h) -- should round. 3. **report/pdf.py** referenced in `pyproject.toml` directory structure but doesn't exist as separate file (functionality is in `engine.py`). 4. **web/assets/** directory exists but is empty -- no custom CSS yet. 5. **No .gitignore** -- should exclude .venv/, __pycache__/, .pytest_cache/, .ruff_cache/, .impakt/ session dirs.