{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://visualspec.dev/schema/1.0/modules/lighting.schema.json",
  "title": "Lighting",
  "description": "Physical and intent-oriented lights, environment illumination and shadows.",
  "$defs": {
    "light": {
      "type": "object",
      "properties": {
        "id": {
          "$ref": "https://visualspec.dev/schema/1.0/modules/common.schema.json#/$defs/id"
        },
        "type": {
          "enum": [
            "directional",
            "point",
            "spot",
            "area",
            "environment",
            "natural"
          ]
        },
        "color": {
          "$ref": "https://visualspec.dev/schema/1.0/modules/appearance.schema.json#/$defs/color"
        },
        "intensity": {
          "type": "number",
          "minimum": 0
        },
        "intensityUnit": {
          "enum": [
            "normalized",
            "lux",
            "lumens",
            "candela",
            "watts"
          ]
        },
        "temperature": {
          "type": "number",
          "minimum": 0
        },
        "position": {
          "$ref": "https://visualspec.dev/schema/1.0/modules/common.schema.json#/$defs/vector3"
        },
        "direction": {
          "$ref": "https://visualspec.dev/schema/1.0/modules/common.schema.json#/$defs/vector3"
        },
        "targetRef": {
          "$ref": "https://visualspec.dev/schema/1.0/modules/common.schema.json#/$defs/id"
        },
        "softness": {
          "type": "number",
          "minimum": 0,
          "maximum": 1
        },
        "falloff": {
          "enum": [
            "none",
            "linear",
            "inverse-square"
          ]
        },
        "range": {
          "type": "number",
          "minimum": 0
        },
        "coneAngle": {
          "type": "number",
          "minimum": 0,
          "maximum": 180
        },
        "size": {
          "$ref": "https://visualspec.dev/schema/1.0/modules/common.schema.json#/$defs/vector2"
        },
        "shadow": {
          "type": "object",
          "properties": {
            "enabled": {
              "type": "boolean"
            },
            "bias": {
              "type": "number"
            },
            "softness": {
              "type": "number",
              "minimum": 0,
              "maximum": 1
            },
            "resolution": {
              "type": "integer",
              "minimum": 1
            }
          },
          "additionalProperties": false
        },
        "assetRef": {
          "$ref": "https://visualspec.dev/schema/1.0/modules/common.schema.json#/$defs/id"
        },
        "role": {
          "enum": [
            "key",
            "fill",
            "rim",
            "background",
            "ambient",
            "practical"
          ]
        },
        "extensions": {
          "$ref": "https://visualspec.dev/schema/1.0/modules/common.schema.json#/$defs/extensions"
        }
      },
      "required": [
        "id",
        "type"
      ],
      "additionalProperties": false
    }
  },
  "$ref": "#/$defs/light"
}