An expression for a style applied to a
Cesium3DTileset
.
Evaluates an expression defined using the 3D Tiles Styling language.
Implements the StyleExpression
interface.
Name | Type | Description |
---|---|---|
expression |
string | optional The expression defined using the 3D Tiles Styling language. |
defines |
object | optional Defines in the style. |
Examples:
const expression = new Cesium.Expression('(regExp("^Chest").test(${County})) && (${YearBuilt} >= 1970)');
expression.evaluate(feature); // returns true or false depending on the feature's properties
const expression = new Cesium.Expression('(${Temperature} > 90) ? color("red") : color("white")');
expression.evaluateColor(feature, result); // returns a Cesium.Color object
Members
Gets the expression defined in the 3D Tiles Styling language.
-
Default Value:
undefined
Methods
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.
Name | Type | Description |
---|---|---|
feature |
Cesium3DTileFeature | The feature whose properties may be used as variables in the expression. |
result |
object | optional The object onto which to store the result. |
Returns:
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 Expression#evaluate
but always returns a Color
object.
Name | Type | Description |
---|---|---|
feature |
Cesium3DTileFeature | The feature whose properties may be used as variables in the expression. |
result |
Color | optional The object in which to store the result |
Returns:
The modified result parameter or a new Color instance if one was not provided.