{ "$schema": "https://json-schema.org/draft/2020-12/schema", "title": "Emaki Ink & Wash scene", "type": "object", "additionalProperties": false, "required": [ "version", "title", "seed", "width", "height", "layers" ], "properties": { "version": { "const": "astra-sketch-1" }, "title": { "type": "string", "maxLength": 200 }, "seed": { "type": "integer", "minimum": 0, "maximum": 4294967295 }, "width": { "type": "integer", "minimum": 256, "maximum": 2400 }, "height": { "type": "integer", "minimum": 256, "maximum": 3000 }, "layers": { "type": "array", "maxItems": 32, "items": { "type": "object", "additionalProperties": false, "required": [ "id", "intent", "marks" ], "properties": { "id": { "type": "string", "minLength": 1, "maxLength": 80 }, "intent": { "type": "string", "maxLength": 500 }, "marks": { "type": "array", "maxItems": 6000, "items": { "oneOf": [ { "type": "object", "additionalProperties": false, "required": [ "type", "points", "color", "opacity" ], "properties": { "type": { "const": "wash" }, "points": { "type": "array", "minItems": 3, "maxItems": 256, "items": { "type": "array", "minItems": 2, "maxItems": 2, "items": { "type": "number", "minimum": 0, "maximum": 1 } } }, "color": { "type": "string", "pattern": "^#[0-9a-fA-F]{6}$" }, "opacity": { "type": "number", "minimum": 0, "maximum": 1 }, "edge": { "type": "number", "minimum": 0, "maximum": 1 }, "texture": { "type": "number", "minimum": 0, "maximum": 1 }, "softness": { "type": "number", "minimum": 0, "maximum": 0.02 }, "dry": { "type": "number", "minimum": 0, "maximum": 1 }, "holes": { "type": "array", "maxItems": 16, "items": { "type": "array", "minItems": 3, "maxItems": 64, "items": { "type": "array", "minItems": 2, "maxItems": 2, "items": { "type": "number", "minimum": 0, "maximum": 1 } } } } } }, { "type": "object", "additionalProperties": false, "required": [ "type", "points", "color", "opacity", "width" ], "properties": { "type": { "const": "line" }, "points": { "type": "array", "minItems": 2, "maxItems": 256, "items": { "type": "array", "minItems": 2, "maxItems": 2, "items": { "type": "number", "minimum": 0, "maximum": 1 } } }, "color": { "type": "string", "pattern": "^#[0-9a-fA-F]{6}$" }, "opacity": { "type": "number", "minimum": 0, "maximum": 1 }, "width": { "type": "number", "minimum": 0.0001, "maximum": 0.03 } } }, { "type": "object", "additionalProperties": false, "required": [ "type", "points", "color", "opacity", "width" ], "properties": { "type": { "const": "brush" }, "points": { "type": "array", "minItems": 2, "maxItems": 256, "items": { "type": "array", "minItems": 2, "maxItems": 2, "items": { "type": "number", "minimum": 0, "maximum": 1 } } }, "color": { "type": "string", "pattern": "^#[0-9a-fA-F]{6}$" }, "opacity": { "type": "number", "minimum": 0, "maximum": 1 }, "width": { "type": "number", "minimum": 0.0001, "maximum": 0.15 }, "texture": { "type": "number", "minimum": 0, "maximum": 1 }, "softness": { "type": "number", "minimum": 0, "maximum": 0.02 }, "dry": { "type": "number", "minimum": 0, "maximum": 1 }, "pressure": { "type": "array", "minItems": 2, "maxItems": 256, "items": { "type": "number", "minimum": 0.05, "maximum": 1 }, "description": "Brush contact fraction per point; length must match points." }, "water": { "type": "number", "minimum": 0, "maximum": 1 }, "duration": { "type": "number", "minimum": 0.1, "maximum": 20 }, "tilt": { "type": "number", "minimum": 0, "maximum": 1 }, "angle": { "type": "number", "minimum": 0, "maximum": 360 }, "load": { "type": "number", "minimum": 0, "maximum": 1 }, "granulation": { "type": "number", "minimum": 0, "maximum": 1 }, "lift": { "type": "number", "minimum": 0, "maximum": 1 }, "gesture": { "type": "object", "additionalProperties": false, "required": [ "version", "provenance", "samples" ], "properties": { "version": { "const": "pose-v1" }, "provenance": { "enum": [ "procedural", "measured", "estimated" ] }, "samples": { "type": "array", "minItems": 2, "maxItems": 256, "items": { "type": "object", "additionalProperties": false, "required": [ "t", "tiltX", "tiltY", "rotation" ], "properties": { "t": { "type": "number", "minimum": 0, "maximum": 20 }, "tiltX": { "type": "number", "minimum": -1, "maximum": 1 }, "tiltY": { "type": "number", "minimum": -1, "maximum": 1 }, "rotation": { "type": "number", "minimum": 0, "maximum": 360 } } } } }, "description": "Experimental material-only pose. Samples match points, time strictly increases from 0 to explicit duration, tilt vector magnitude <=1. Scalar angle/tilt are disallowed. Procedural approximation, not calibrated six-DOF physics." }, "dynamics": { "type": "object", "additionalProperties": false, "required": [ "model", "compliance", "recovery" ], "properties": { "model": { "const": "tuft-v1" }, "compliance": { "type": "number", "minimum": 0, "maximum": 1 }, "recovery": { "type": "number", "minimum": 0.02, "maximum": 0.4 } }, "description": "Experimental overdamped single-tuft bend and recovery. Requires gesture. Compliance=0 disables deformation. Recovery is seconds. Not calibrated individual bristles." }, "supply": { "oneOf": [ { "type": "object", "additionalProperties": false, "required": [ "model", "id", "action", "capacity", "release", "pickup" ], "properties": { "model": { "const": "reservoir-v1" }, "id": { "type": "string", "pattern": "^[a-zA-Z0-9_-]{1,40}$" }, "action": { "enum": [ "reload", "continue" ] }, "capacity": { "type": "number", "minimum": 0.1, "maximum": 30 }, "release": { "type": "number", "minimum": 0.01, "maximum": 12 }, "pickup": { "type": "number", "minimum": 0, "maximum": 4 } }, "description": "Experimental finite persistent brush. reload rinses prior charge to waste then loads; continue retains charge. Requires material, gesture, explicit water, no load or lift. Capacity in full-pressure footprint areas, release/pickup are empirical rates. Runtime validates prior load and unchanged width/color/opacity/water/granulation/capacity on continue." }, { "type": "object", "additionalProperties": false, "required": [ "model", "id", "action", "capacity", "conductance" ], "properties": { "model": { "const": "reservoir-v2" }, "id": { "type": "string", "pattern": "^[a-zA-Z0-9_-]{1,40}$" }, "action": { "enum": [ "reload", "continue" ] }, "capacity": { "type": "number", "minimum": 0.1, "maximum": 30 }, "conductance": { "type": "number", "minimum": 0.01, "maximum": 12 } }, "description": "Opt-in simultaneous wetness-gradient exchange; single conductance replaces release/pickup. Same loading/continuation rules. Relative water content proxy, not calibrated capillary physics." } ] } } }, { "type": "object", "additionalProperties": false, "required": [ "type", "seconds" ], "properties": { "type": { "const": "wait" }, "seconds": { "type": "number", "minimum": 0.1, "maximum": 180 } } } ] } }, "environment": { "type": "object", "additionalProperties": false, "required": [ "drying" ], "properties": { "drying": { "enum": [ "normal", "hold" ] } }, "description": "Assisted layer scope. hold pauses fixation, absorption and evaporation; transport continues. Requires material." } } } }, "material": { "type": "object", "additionalProperties": false, "required": [ "model", "resolution", "roughness", "absorbency" ], "properties": { "model": { "enum": [ "paper-brush-v1", "paper-brush-v2", "paper-brush-v3" ] }, "resolution": { "enum": [ 384, 640, 768, 960 ] }, "roughness": { "type": "number", "minimum": 0, "maximum": 1 }, "absorbency": { "type": "number", "minimum": 0, "maximum": 1 } } } }, "description": "Runtime additionally limits total marks to6000 and enforces unique layer ids and7.2M pixels.", "$comment": "validateScene also enforces material-only brush fields, lift opacity=0, total grid <=1.5M, wet brush/wait only, global time/point budgets. Gesture also requires explicit duration, per-point samples, bounded contact work, increasing times and no scalar angle/tilt; validateScene enforces these." }