# MapGISM3D

#### new Cesium.MapGISM3D()
MapGIS/M3dLayer/MapGISM3D.js 61

A tile in a `Cesium3DTileset`. When a tile is first created, its content is not loaded; the content is loaded on-demand when needed based on the view.

Do not construct this directly, instead access tiles through `Cesium3DTileset#tileVisible`.

### Members

#### readonly boundingSphere : BoundingSphere
MapGIS/M3dLayer/MapGISM3D.js 558

Get the bounding sphere derived from the tile's bounding volume.

#### readonly children : Array.<MapGISM3D>
MapGIS/M3dLayer/MapGISM3D.js 184

Gets the tile's children.

#### readonly computedTransform : Matrix4
MapGIS/M3dLayer/MapGISM3D.js 88

The final computed transform of this tile.

#### readonly content : Cesium3DTileContent
MapGIS/M3dLayer/MapGISM3D.js 504

The tile's content. This represents the actual tile's payload, not the content's metadata in the tileset JSON file.

#### expireDate : JulianDate
MapGIS/M3dLayer/MapGISM3D.js 376

The date when the content expires and new content is requested.

#### expireDuration : Number
MapGIS/M3dLayer/MapGISM3D.js 369

The time in seconds after the tile's content is ready when the content expires and new content is requested.

#### readonly extras : *
MapGIS/M3dLayer/MapGISM3D.js 574

Returns the `extras` property in the tileset JSON for this tile, which contains application specific metadata. Returns `undefined` if `extras` does not exist.

##### See:

- Extras in the 3D Tiles specification.

#### readonly geometricError : Number
MapGIS/M3dLayer/MapGISM3D.js 119

The error, in meters, introduced if this tile is rendered and its children are not. This is used to compute screen space error, i.e., the error measured in pixels.

#### readonly parent : MapGISM3D
MapGIS/M3dLayer/MapGISM3D.js 200

This tile's parent or `undefined` if this tile is the root.

When a tile's content points to an external tileset JSON file, the external tileset's root tile's parent is not `undefined`; instead, the parent references the tile (with its content pointing to an external tileset JSON file) as if the two tilesets were merged.

#### readonly tileset : Cesium3DTileset
MapGIS/M3dLayer/MapGISM3D.js 489

The tileset containing this tile.

### Methods

#### reset()
MapGIS/M3dLayer/MapGISM3D.js 2078

重置当前节点颜色

#### searchMultimodalTile()
MapGIS/M3dLayer/MapGISM3D.js 1878

Get the Multimodal tile.

Author:
  - fgy