{
  "title": "Neural Canvas",
  "created": "2026-09-06",
  "scope": "Official MaleCNS brain and nerve cord connectivity with an adapted spiking model. Computed neural activity drives crafted, illustrative movements; this is not a validated whole-fly emulation.",
  "data": {
    "dataset": "MaleCNS v1.0",
    "neurons": 166700,
    "directedEdges": 25582938,
    "synapses": 124177617,
    "paintableSomaPositions": 139662,
    "selection": "All annotation rows with non-null superclass, induced graph without an additional edge threshold",
    "source": "https://male-cns.janelia.org/download/",
    "license": "CC BY 4.0",
    "audit": "./data/manifest.json",
    "identifiers": "bodyId is a unique dataset identifier, not a sequential neuron number; 166700 unique records, IDs10001\u20131471062202."
  },
  "neuralModel": {
    "reference": "https://www.nature.com/articles/s41586-024-07763-9",
    "dtMs": 0.1,
    "membraneTauMs": 20,
    "synapticTauMs": 5,
    "thresholdMv": -45,
    "restMv": -52,
    "delayMs": 1.8,
    "refractoryMs": 2.2,
    "synapseWeightMv": 0.275,
    "poissonVoltageMv": 68.75,
    "seed": 1,
    "signs": {
      "acetylcholine": 1,
      "gaba": -1,
      "glutamate": -1,
      "dopamine": 1,
      "octopamine": 1,
      "serotonin": 1,
      "histamine": 0,
      "unknown": 0
    },
    "omittedFastOutputNeurons": 11068,
    "pulse": {
      "initialHz": 180,
      "holdMs": 80,
      "decayTauMs": 180,
      "maximumMs": 1000,
      "rateFloorHz": 1,
      "updateMs": 10,
      "turnPreset": {
        "holdMs": 650,
        "decayTauMs": 220,
        "maximumMs": 2500,
        "replaceExternalInputs": true,
        "preserveRecurrentState": true,
        "directDescendingInput": true
      },
      "actionTargets": {
        "walk": "Bilateral LC9",
        "left": "Left LC9 and DNa02",
        "right": "Right LC9 and DNa02",
        "fly": "Bilateral LC4",
        "turnRationale": "Direct ipsilateral DNa02 input keeps turn readout active when LC9 recruitment is weak; spikes still pass through the neural model and rate decoder."
      }
    }
  },
  "controller": {
    "kind": "Crafted animation driven by computed firing rates; no direct brush or preset input",
    "readouts": [
      "DNp09/DNg100/DNg97 left and right",
      "DNa02/DNa11/DNg13 left and right",
      "MDN",
      "DNp01"
    ],
    "filterMs": 80,
    "units": "millimetres, seconds, radians",
    "walkingGainMmS": 8,
    "yawGainRadS": 3.8,
    "jumpLaunchMmS": 80,
    "gravityMmS2": 9810,
    "movement": "Smoothed rate-to-speed and rate-to-yaw mapping, authored tripod foot trajectories, joint-limited IK, and a bounded flight/landing controller. No contact, muscle or aerodynamic simulation.",
    "sensoryFeedback": "None; body motion does not feed back into the neural network.",
    "escapeFlight": {
      "triggerHz": 100,
      "rearmHz": 45,
      "minimumPoweredSeconds": 0.35,
      "maximumPoweredSeconds": 0.9,
      "quietBeforeLandingSeconds": 0.06,
      "heightTargetMm": [
        2.2,
        3
      ],
      "speedTargetMmS": [
        16,
        24
      ],
      "altitudeOmega": 24,
      "landingOmega": 16,
      "maxSubstepSeconds": 0.002,
      "contactThresholdMm": 0.025,
      "postLandingCooldownSeconds": 0.2,
      "wingDeploymentTauSeconds": 0.022,
      "wingFoldingTauSeconds": 0.065,
      "sequenceReference": "https://journals.biologists.com/jeb/article/211/3/341/18097/Performance-trade-offs-in-the-flight-initiation-of",
      "scope": "Authored bounded flight controller triggered by computed DNp01 rates. Numerical movement gains are illustrative, not fitted physiology."
    }
  },
  "body": {
    "source": "https://github.com/NeLy-EPFL/fly-svg-maker/tree/152506d3471646f009480c81f34aefbaec29a6e5",
    "description": "Official NeuroMechFly micro-CT-derived female specimen meshes and kinematic tree used to visualize the male-connectome experiment",
    "segments": 69,
    "uniqueMeshes": 39,
    "meshLicense": "Apache-2.0",
    "kinematicCodeLicense": "MIT",
    "wings": {
      "foldedDegrees": {
        "pitch": 30,
        "leftRoll": 0,
        "rightRoll": 0,
        "leftYaw": 5,
        "rightYaw": -5
      },
      "extendedDegrees": {
        "pitch": 10,
        "leftRoll": -75,
        "rightRoll": 75,
        "leftYaw": 20,
        "rightYaw": -20
      },
      "flapAmplitudeDegrees": 35,
      "flapStartsAboveExtension": 0.7,
      "wingbeatHz": 277,
      "temporalExposures": 3,
      "hinges": "Original measured positions, unchanged",
      "clock": "Interpolated neural time; no animation progress beyond computed simulation time"
    },
    "gaitPosture": {
      "method": "Damped Jacobian null-space posture correction around standing pose calibrated once from measured skeleton; foot targets and measured joint limits preserved",
      "timeConstantMs": 120,
      "maximumElapsedMs": 50,
      "settledJointToleranceRad": 0.001,
      "skipJacobianWhenFootAndPostureConverged": true
    }
  },
  "compute": {
    "runtime": "@huggingface/kernels 0.0.1-preview.1, pinned npm dependency",
    "sparseOperator": "Outgoing CSR with 19 sparse delayed spike queues, indirect four-source workgroups and fused integration/event/reset on the kernel runtime GPUDevice",
    "deviceBridge": "Pinned and guarded tensor.runtime.host.device implementation interface",
    "decoder": "Official MatMul on 18 gathered resident motor-neuron counts (6x18); single readback fence for full counts and motor rates; all six outputs compared to JavaScript each batch",
    "kernels": {
      "Identity": "88a09b2fc38107f00e33af195ca4507df772967e",
      "MatMul": "16a3da1933ef99f9daf823f87569cd12b6429d66"
    },
    "fallback": "JavaScript reference; runtime GPU failure restarts from reset state"
  },
  "limitations": [
    "Model transfer from female brain research to male CNS is unvalidated.",
    "Unknown/histamine fast signaling, intrinsic heterogeneity, receptor-specific dynamics, gap junctions and neuromodulation omitted.",
    "Some pulses lead to sustained recurrent activity even after the input and body motion settle.",
    "Body mesh comes from a female specimen. Movement gains, activation thresholds, pulse envelopes, gait and flight are authored for the demo, not fitted or validated against animal behavior.",
    "Computed spikes drive an illustrative controller rather than individual muscles. Ground contact, aerodynamics and body-to-neural sensory feedback are omitted."
  ],
  "rendering": {
    "interface": "Reference split layout with responsive toolbars and a single enlarged fly canvas beneath title, transport/camera controls and specimen/scale overlays",
    "surfaceDetail": "Authored compound-eye facets, cuticle variation, illustrative wing veins and 319 attached bristles; source scan geometry and hinges unchanged",
    "depthOfField": {
      "method": "One scene render, beauty depth texture, alpha-preserving BokehShader and MacroOutputPass (always enabled)",
      "focus": "Head centre in camera-space depth",
      "aperture": 0.0012,
      "maximumBlur": 0.004,
      "transparentWingDepthWrite": false,
      "optional": true
    },
    "maximumPixelRatio": 1.5,
    "maximumRenderPixels": 1200000,
    "camera": {
      "fieldOfViewDegrees": 30,
      "sideOffsetMm": [
        3.2,
        -5.7,
        1.9
      ],
      "bodyTargetMm": [
        -0.4,
        0,
        0.68
      ],
      "flightDistanceMultiplier": 1.5,
      "following": "Side has a fixed world viewing angle with full position tracking; Top fixed overhead; Follow rear three-quarter chase camera with 160 ms neural-time heading smoothing. Manual orbit releases heading tracking.",
      "followOffsetMm": [
        -5.5,
        -4.8,
        2.8
      ],
      "overlayFraming": "Vertical projection offset centers camera target between header/camera and specimen overlays"
    },
    "fontLicense": "SIL Open Font License 1.1",
    "brainView": {
      "rotationAboutXDegrees": 25,
      "cameraBounds": "0.01%\u201399.99% projected coordinate quantiles; framing only, membership unchanged",
      "members": 124296,
      "visibleAt920By460": 124295,
      "projection": "Rigid orthographic view with uniform scale; all official positions and hit tests retained"
    },
    "backdrop": {
      "edgeSRGB": "#10171d",
      "centerSRGB": "#202a35",
      "composite": "Unpremultiply linear scene before tone mapping; composite against encoded gradient after color-space transform",
      "groundFade": "Camera-space depth; start=max(9 mm,camera target distance+2 mm), end=start+15 mm"
    },
    "icons": "Official Lucide paintbrush, eraser and footprints; bundled ISC/MIT license notices",
    "setup": {
      "initial": "Blocking native modal with Download & start; no anatomy or weight download before explicit action",
      "ready": "Unlock painting only after anatomy, fly meshes and compute initialization finish",
      "recovery": "Progress, checked cached weight reuse, asset/worker retry and automatic CPU fallback",
      "labels": {
        "presets": "Actions",
        "escapeAction": "Fly",
        "escapeReadout": "Escape drive"
      }
    }
  }
}