node.schema.json

{
    "$schema": "http://json-schema.org/draft-04/schema",
    "title": "Node",
    "type": "object",
    "description": "A node in the node hierarchy.  When the node contains `skin`, all `mesh.primitives` must contain `JOINTS_0` and `WEIGHTS_0` attributes.  A node can have either a `matrix` or any combination of `translation`/`rotation`/`scale` (TRS) properties. TRS properties are converted to matrices and postmultiplied in the `T * R * S` order to compose the transformation matrix; first the scale is applied to the vertices, then the rotation, and then the translation. If none are provided, the transform is the identity. When a node is targeted for animation (referenced by an animation.channel.target), only TRS properties may be present; `matrix` will not be present.",
    "allOf": [ { "$ref": "glTFChildOfRootProperty.schema.json" } ],
    "properties": {
        "camera": {
            "allOf": [ { "$ref": "glTFid.schema.json" } ],
            "description": "The index of the camera referenced by this node."
        },
        "children": {
            "type": "array",
            "description": "The indices of this node's children.",
            "items": {
                "$ref": "glTFid.schema.json"
            },
            "uniqueItems": true,
            "minItems": 1
        },
        "skin": {
            "allOf": [ { "$ref": "glTFid.schema.json" } ],
            "description": "The index of the skin referenced by this node.",
            "gltf_detailedDescription": "The index of the skin referenced by this node. When a skin is referenced by a node within a scene, all joints used by the skin must belong to the same scene."
        },
        "matrix": {
            "type": "array",
            "description": "A floating-point 4x4 transformation matrix stored in column-major order.",
            "items": {
                "type": "number"
            },
            "minItems": 16,
            "maxItems": 16,
            "default": [ 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0, 0.0, 0.0, 0.0, 0.0, 1.0 ],
            "gltf_detailedDescription": "A floating-point 4x4 transformation matrix stored in column-major order.",
            "gltf_webgl": "`uniformMatrix4fv()` with the transpose parameter equal to false"
        },
        "mesh": {
            "allOf": [ { "$ref": "glTFid.schema.json" } ],
            "description": "The index of the mesh in this node."
        },
        "rotation": {
            "type": "array",
            "description": "The node's unit quaternion rotation in the order (x, y, z, w), where w is the scalar.",
            "items": {
                "type": "number",
                "minimum": -1.0,
                "maximum": 1.0
            },
            "minItems": 4,
            "maxItems": 4,
            "default": [ 0.0, 0.0, 0.0, 1.0 ]
        },
        "scale": {
            "type": "array",
            "description": "The node's non-uniform scale, given as the scaling factors along the x, y, and z axes.",
            "items": {
                "type": "number"
            },
            "minItems": 3,
            "maxItems": 3,
            "default": [ 1.0, 1.0, 1.0 ]
        },
        "translation": {
            "type": "array",
            "description": "The node's translation along the x, y, and z axes.",
            "items": {
                "type": "number"
            },
            "minItems": 3,
            "maxItems": 3,
            "default": [ 0.0, 0.0, 0.0 ]
        },
        "weights": {
            "type": "array",
            "description": "The weights of the instantiated Morph Target. Number of elements must match number of Morph Targets of used mesh.",
            "minItems": 1,
            "items": {
                "type": "number"
            }
        },
        "name": { },
        "extensions": { },
        "extras": { }
    },
    "dependencies": {
        "weights": [ "mesh" ],
        "skin": [ "mesh" ]
    },
    "not": {
        "anyOf": [
            { "required": [ "matrix", "translation" ] },
            { "required": [ "matrix", "rotation" ] },
            { "required": [ "matrix", "scale" ] }
        ]
    }
}