The GPM metadata for a Ground-Space Indirect implementation stored
locally (i.e. a tile and/or leaf node).
This reflects the root extension object of the NGA_gpm_local
glTF extension. When a model that contains this extension was loaded,
then an object of this type can be obtained by calling
```
const gltfGpmLocal = model.getExtension("NGA_gpm_local");
```
The storage type determines the presence of the optional properties:
- When the storage type is `StorageType.Indirect`, then the `anchorPointsIndirect` and `intraTileCorrelationGroups` are present.
- When the storage type is `StorageType.Direct`, then the `anchorPointsDirect` and `covarianceDirect` are present.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
options |
GltfGpmLocal.ConstructorOptions | An object describing initialization options |
Experimental
This feature is not final and is subject to change without Cesium's standard deprecation policy.
成员(属性)
readonly anchorPointsDirect : Array.<AnchorPointDirect>|undefined
Array of stored direct anchor points
readonly anchorPointsIndirect : Array.<AnchorPointIndirect>|undefined
Array of stored indirect anchor points
readonly covarianceDirect : Matrix3|undefined
The full covariance of anchor point parameters
readonly intraTileCorrelationGroups : Array.<CorrelationGroup>|undefined
Metadata identifying parameters using same correlation modeling and
associated correlation parameters
readonly storageType : StorageType
Specifies if covariance storage is indirect or direct.
定义的类型
Initialization options for the GltfGpmLocal constructor
属性:
| 属性名称 | 类型 | 可选 | 描述信息 |
|---|---|---|---|
storageType |
string | The storage type. This must be one of the `StorageType` constants, i.e. `Direct` or `Indirect`. | |
anchorPointsIndirect |
Array.<AnchorPointIndirect> | undefined |
<可选> |
The indirect anchor points. This must be present if and only if the storage type is `Indirect`. |
intraTileCorrelationGroups |
Array.<CorrelationGroup> | undefined |
<可选> |
The intra-tile correlation groups. This must be present if and only if the storage type is `Indirect`. |
anchorPointsDirect |
Array.<AnchorPointDirect> | undefined |
<可选> |
The direct anchor points. This must be present if and only if the storage type is `Direct`. |
covarianceDirect |
Matrix3 | undefined |
<可选> |
The covariance of anchor point parameters. This must be present if and only if the storage type is `Direct`. |