An expression for a style applied to a
Cesium3DTileset.
Derived classes of this interface evaluate expressions in the 3D Tiles Styling language.
This type describes an interface and is not intended to be instantiated directly.
方法
evaluate(feature, result) → boolean|number|string|RegExp|Cartesian2|Cartesian3|Cartesian4|Color
Evaluates the result of an expression, optionally using the provided feature's properties. If the result of
the expression in the
3D Tiles Styling language
is of type
Boolean, Number, or String, the corresponding JavaScript
primitive type will be returned. If the result is a RegExp, a Javascript RegExp
object will be returned. If the result is a Cartesian2, Cartesian3, or Cartesian4,
a Cartesian2, Cartesian3, or Cartesian4 object will be returned. If the result argument is
a Color, the Cartesian4 value is converted to a Color and then returned.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
feature |
Cesium3DTileFeature | The feature whose properties may be used as variables in the expression. |
result |
object | 可选 The object onto which to store the result. |
返回值:
The result of evaluating the expression.
evaluateColor(feature, result) → Color
Evaluates the result of a Color expression, optionally using the provided feature's properties.
This is equivalent to StyleExpression#evaluate but always returns a Color object.
| 参数名称 | 类型 | 描述信息 |
|---|---|---|
feature |
Cesium3DTileFeature | The feature whose properties may be used as variables in the expression. |
result |
Color | 可选 The object in which to store the result. |
返回值:
The modified result parameter or a new Color instance if one was not provided.