72 lines
2.6 KiB
YAML
72 lines
2.6 KiB
YAML
# Node manifest: the typed contract a consumer wires against.
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#
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# No source package is shared between node repositories, so this file and the
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# schema written out below are the only contract a consumer has. `dora validate`
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# checks a dataflow against it without running the node, so CI needs no gamepad.
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#
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# `joy` is deliberately **untyped**. dora 1.0 has no standard joystick type and
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# the reading is an Arrow struct; annotating it with a std type would claim a
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# contract neither side keeps. The struct is documented instead.
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apiVersion: 1
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name: dora-joy
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namespace: liria
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description: Publishes a gamepad's axes and buttons, raw and unshaped
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categories: [sensor]
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keywords: [joystick, gamepad, joy, controller, input, sdl, pygame, axes, buttons]
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runtime: python
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entrypoint: dora-joy
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# `dora build --uv` / `dora run --uv` rewrites this to `uv pip install .` and
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# gives the node its own managed venv under `.dora/python-envs/`, so the
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# dependencies it sees at runtime are the ones installed here.
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build: pip install .
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dora: ">=1.0"
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inputs:
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tick:
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required: true
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description: >-
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Publishes the latest reading. Wire to dora/timer/millis/20. The node stops
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when this input closes. A consumer's own loop is usually slower; ticking
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faster than it costs almost nothing and keeps the reading it acts on fresh.
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type: std/core/v1/UInt64
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outputs:
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joy:
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description: >-
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One reading, as the Arrow struct
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`{axes: list<float32>, buttons: list<bool>, present: bool}`.
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`axes` and `buttons` are raw, exactly as SDL reports them: no deadzone, no
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response curve, no rescaling. A resting trigger reads -1.0 rather than 0.0,
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and a consumer that treats an axis as a stick without checking will find
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that out here. Shaping is a decision about what a reading *means* and
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belongs to whoever is acting on it.
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`present` is false when no pad is open — unplugged, never plugged in, or
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taken away by SDL mid-run. **An absent pad is not a centred pad**, and a
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consumer driving anything that moves must treat it as a stop rather than
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as zeroed axes.
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Published on **every** tick, changed or not, so the stream doubles as a
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heartbeat: silence means this node died, and nothing else. A consumer that
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acts on the reading should stop on silence as well as on `present: false`.
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env:
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JOYSTICK_INDEX:
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type: int
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default: 0
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description: Which pad to open, when more than one is plugged in. Defaults to 0.
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example: |
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- id: joy
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git: https://gitea.liria.cl/liria/dora-joy.git
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tag: v0.1
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build: pip install .
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path: dora-joy
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inputs:
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tick: dora/timer/millis/20
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outputs:
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- joy
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