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ykcheungab f700102067 docs: record the GUI extraction plan, postponed
examples/gui/ is a full Qt + open3d application (30 modules, 4,815 lines) rather
than an example, and its proper home is the orisys-studio application. The move
is planned but not started, so this records the plan rather than performing any
of it.

What the plan establishes, so the work does not have to be re-derived:

- src/orisys/ imports no gui/viz/examples module, verified by AST rather than
  grep. The dependency is one-way, so the GUI can leave without a library
  change. The single apparent hit is `from .pipeline import ...` in
  src/orisys/__init__.py, which is the SDK's own module.
- examples/viz/ is shared and cannot follow the GUI wholesale: it mixes open3d
  renderers with toolkit-independent helpers that examples/pipeline/service.py
  and tests/test_contact_arrow_scale.py depend on. It has to be split.
- The real coupling is inverted and lives in the tests: tests/test_qt_viewer_backend.py
  imports examples/gui, and tests/conftest.py deliberately puts examples/ ahead
  of build/ because both define a package named `gui`. Removing the GUI means
  re-deriving that guard, not deleting it blindly.
- UVMeshViewer and friends are in src/orisys/finger/__init__.__all__, so removing
  them is a breaking change to a released API and needs a deprecation release
  first. It must not be folded into a code move.
- The `examples/` directory must keep existing in the packaged layout even after
  gui/ leaves it: src/orisys/configs.py anchors its run-root detection on a
  sibling examples/ folder.

Also updates examples/README.md to say "lives here for now" instead of "is moving
out", so nothing reads as work in progress. The GUI itself is untouched, and the
only guidance offered is that new SDK work should not build on it.
2026-09-30 17:10:17 +08:00

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Markdown

# Examples
Runnable demos live at the `examples/` root. Shared helpers stay in `pipeline/`, `viz/`, and
`gui/`. Run commands from the repository root.
## Start here
Both recommended examples create one object, then read a frame at a time. Everything else -
camera reading, stitching, preprocessing, the optical-flow and force stages - happens inside
`StreamPipeline`, and each frame arrives as one `FrameSnapshot`. There is no stage sequence to
remember and no tuple to unpack, and no backend setting to tune.
| Product | Entry | Default config |
|---------|-------|----------------|
| ORY-BOX | `basic_pipeline.py` | `box` |
| ORY-MINI | `basic_pipeline.py -c mini` | `mini` |
| ORY-FINGER | `finger_pipeline.py` | `finger` |
```python
# ORY-BOX / ORY-MINI
sensor = orisys.Sensor(0, config_name="box")
with orisys.StreamPipeline(sensor, sensor.get_img, contact=True) as pipe:
while (snap := pipe.wait()) is not None:
print(snap.normal_force, snap.shear_x, snap.shear_y)
# ORY-FINGER - the runtime owns camera, Blender export, unroll map and valid mask
runtime = FingerRuntime.open(config="finger", video=0)
with runtime.pipeline(contact=True) as pipe:
while (snap := pipe.wait()) is not None:
print(snap.normal_force, snap.shear_x, snap.shear_y)
```
`contact=True` runs contact analysis; `include=(...)` chooses which arrays each snapshot carries
(`image`, `flow`, `vnormal`, `vshear`, `depth`, `centroid`, `contour`). Arrays you do not include
are `None`, so you pay only for what you use. `pipe.reset()` resets the tracker safely from your
loop; `snap.image_size_raw` reports the capture resolution before UV unroll or resize.
### Typical usage
```bash
python examples/basic_pipeline.py -v 0 -c box # first camera, ORY-BOX
python examples/basic_pipeline.py -v 0 -c mini # ORY-MINI
python examples/basic_pipeline.py -v recording.mp4 -c box
python examples/basic_pipeline.py --no-show # headless: print only
python examples/finger_pipeline.py --camera_id 0 --config finger
python examples/finger_pipeline.py --video data/dd02-0703/1.mp4
```
Keys in both: `q` quits, `r` resets the tracker.
## The manual form, for when you need the stages
`examples/archive/` holds the previous versions of these two examples. They call the stages by
hand:
```python
sensor.get_img()
sensor.compute_deformation()
sensor.compute_contact()
fps, flow, vnormal, img, ... = sensor.read_info( ... ) # positional, 13 elements
```
That path is still supported and still correct - it is the right choice if you are implementing
your own scheduling. It is no longer the recommended starting point, and the archived files carry
a header explaining the difference. They are kept so that code copied from them keeps working.
## Other root examples
- `multi_stream.py` - several sensors at once, using `StreamPipeline` with `StreamRecorder`
- `two_sensor_pipeline.py` - two-sensor multiprocessing demo, manual staging
- `plot_data.py` - single-sensor OpenCV views plus PyQtGraph force charts
- `finger_pipeline_3dview.py` - the Qt/open3d dashboard; see the note below
## Requirements
- SDK installed from the repository root: `pip install -e .`
- a camera index or a test video path
- matching config names under `./config/` or the packaged `orisys/configs/`
Qt / PyQtGraph examples additionally need `pip install -e ".[gui]"`.
## The GUI lives here for now
`examples/gui/` - the 2D viewer, the 3D dashboard and their widgets - is a full Qt + open3d
application rather than an example, and its proper home is the **orisys-studio** application.
That move is **planned but not started**; `finger_pipeline_3dview.py` and `examples/gui/` work
exactly as before. The plan, including the coupling that makes it non-trivial, is in
`docs/plan-gui-extraction.md`.
The practical guidance is only that new SDK work should not build on `examples/gui/`.