The defaultGeometry schema is used in stores where all arrayBufferView geometry declarations use the same pattern for face and vertex elements. This schema reduces redundancies of arrayBufferView geometry declarations in a store and reuses the geometryAttribute type from featureData. Only valueType and valuesPerElement are required.

Geometry buffer

fieldName	type	description
vertexCount	UINT32	Number of vertices
featureCount	UINT32	Number of features.
position	Float32[3*vertex count]	Vertex x,y,z positions.
normal	Float32[3*vertex count]	Normals x,y,z vectors.
uv0	Float32[2*vertex count]	Texture coordinates.
color	UInt8[4*vertex count	RGBA colors.
id	UInt64[feature count]	Feature IDs.
faceRange	UInt32[2*feature count	Inclusive range of the mesh triangles belonging to each feature in the featureID array.
region	UINT16[4*vertex count]	UV region for repeated textures.

Related:

cmn::store, psl::store

Properties

Property	Type	Description
geometryType	string	Low-level default geometry type. If defined, all geometries in the store are expected to have this type. Must be: triangles
topology	string	Declares the topology of embedded geometry attributes. When 'Indexed', the indices must also be declared in the geometry schema ('faces') and precede the vertexAttribute data. Possible values are: PerAttributeArray Indexed: When Indexed, the indices must also be declared in the geometry schema (faces) and precede the vertexAttribute data.
header	headerAttribute[]	Defines header fields in the geometry resources of this store that precede the vertex (and index) data.
ordering	string[]	Defines the ordering of the vertex Attributes.
vertexAttributes	vertexAttribute	Declaration of the attributes per vertex in the geometry, such as position, normals or texture coordinates.
faces	vertexAttribute	Declaration of the indices into vertex attributes that define faces in the geometry, such as position, normals or texture coordinates.
featureAttributeOrder	string[]	Provides the order of the keys in featureAttributes, if present.
featureAttributes	featureAttribute	Declaration of the attributes per feature in the geometry, such as feature ID or face range.

Note: properties in bold are required

Examples

Example: defaultGeometrySchema for 3D Object and integrated mesh scene layer

 {
  "geometryType": "triangles",
  "header": [
    {
      "property": "vertexCount",
      "type": "UInt32"
    },
    {
      "property": "featureCount",
      "type": "UInt32"
    }
  ],
  "topology": "PerAttributeArray",
  "ordering": [
    "position",
    "normal",
    "uv0",
    "color"
  ],
  "vertexAttributes": {
    "position": {
      "valueType": "Float32",
      "valuesPerElement": 3
    },
    "normal": {
      "valueType": "Float32",
      "valuesPerElement": 3
    },
    "uv0": {
      "valueType": "Float32",
      "valuesPerElement": 2
    },
    "color": {
      "valueType": "UInt8",
      "valuesPerElement": 4
    }
  },
  "featureAttributeOrder": [
    "id",
    "faceRange"
  ],
  "featureAttributes": {
    "id": {
      "valueType": "UInt64",
      "valuesPerElement": 1
    },
    "faceRange": {
      "valueType": "UInt32",
      "valuesPerElement": 2
    }
  }
}