# Cesium3DTileStyle

#### new Cesium.Cesium3DTileStyle(style)
Scene/Cesium3DTileStyle.js 58

A style that is applied to a `Cesium3DTileset`.

Evaluates an expression defined using the 3D Tiles Styling language.

Name | Type | Description
--- | --- | ---
`style` | Resource | String | Object | optional The url of a style or an object defining a style.

##### Examples:

    tileset.style = new Cesium.Cesium3DTileStyle({
        color : {
            conditions : [
                ['${Height} >= 100', 'color("purple", 0.5)'],
                ['${Height} >= 50', 'color("red")'],
                ['true', 'color("blue")']
            ]
        },
        show : '${Height} > 0',
        meta : {
            description : '"Building id ${id} has height ${Height}."'
        }
    });

    tileset.style = new Cesium.Cesium3DTileStyle({
        color : 'vec4(${Temperature})',
        pointSize : '${Temperature} * 2.0'
    });

##### See:

- 3D Tiles Styling language

### Members

#### anchorLineColor : StyleExpression
Scene/Cesium3DTileStyle.js 1226

Gets or sets the `StyleExpression` object used to evaluate the style's `anchorLineColor` property. Alternatively a string or object defining a color style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Color`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium.Cesium3DTileStyle();
    // Override anchorLineColor expression with a string
    style.anchorLineColor = 'color("blue")';

    var style = new Cesium.Cesium3DTileStyle();
    // Override anchorLineColor expression with a condition
    style.anchorLineColor = {
        conditions : [
            ['${height} > 2', 'color("cyan")'],
            ['true', 'color("blue")']
        ]
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### anchorLineEnabled : StyleExpression
Scene/Cesium3DTileStyle.js 1177

Gets or sets the `StyleExpression` object used to evaluate the style's `anchorLineEnabled` property. Alternatively a string or object defining a boolean style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Boolean`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium.Cesium3DTileStyle();
    // Override anchorLineEnabled expression with a string
    style.anchorLineEnabled = 'true';

    var style = new Cesium.Cesium3DTileStyle();
    // Override anchorLineEnabled expression with a condition
    style.anchorLineEnabled = {
        conditions : [
            ['${height} > 2', 'true'],
            ['true', 'false']
        ]
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### backgroundColor : StyleExpression
Scene/Cesium3DTileStyle.js 870

Gets or sets the `StyleExpression` object used to evaluate the style's `backgroundColor` property. Alternatively a string or object defining a color style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Color`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium.Cesium3DTileStyle();
    // Override backgroundColor expression with a string
    style.backgroundColor = 'color("blue")';

    var style = new Cesium.Cesium3DTileStyle();
    // Override backgroundColor expression with a condition
    style.backgroundColor = {
        conditions : [
            ['${height} > 2', 'color("cyan")'],
            ['true', 'color("blue")']
        ]
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### backgroundEnabled : StyleExpression
Scene/Cesium3DTileStyle.js 959

Gets or sets the `StyleExpression` object used to evaluate the style's `backgroundEnabled` property. Alternatively a string or object defining a boolean style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Boolean`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium.Cesium3DTileStyle();
    // Override backgroundEnabled expression with a string
    style.backgroundEnabled = 'true';

    var style = new Cesium.Cesium3DTileStyle();
    // Override backgroundEnabled expression with a condition
    style.backgroundEnabled = {
        conditions : [
            ['${height} > 2', 'true'],
            ['true', 'false']
        ]
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### backgroundPadding : StyleExpression
Scene/Cesium3DTileStyle.js 910

Gets or sets the `StyleExpression` object used to evaluate the style's `backgroundPadding` property. Alternatively a string or object defining a vec2 style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Cartesian2`.

This expression is only applicable to point features in a Vector tile.

##### Example:

    var style = new Cesium.Cesium3DTileStyle();
    // Override backgroundPadding expression with a string
    style.backgroundPadding = 'vec2(5.0, 7.0)';
    style.backgroundPadding.evaluate(feature); // returns a Cartesian2

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### color : StyleExpression
Scene/Cesium3DTileStyle.js 360

Gets or sets the `StyleExpression` object used to evaluate the style's `color` property. Alternatively a string or object defining a color style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Color`.

This expression is applicable to all tile formats.

##### Examples:

    var style = new Cesium3DTileStyle({
        color : '(${Temperature} > 90) ? color("red") : color("white")'
    });
    style.color.evaluateColor(feature, result); // returns a Cesium.Color object

    var style = new Cesium.Cesium3DTileStyle();
    // Override color expression with a custom function
    style.color = {
        evaluateColor : function(feature, result) {
            return Cesium.Color.clone(Cesium.Color.WHITE, result);
        }
    };

    var style = new Cesium.Cesium3DTileStyle();
    // Override color expression with a string
    style.color = 'color("blue")';

    var style = new Cesium.Cesium3DTileStyle();
    // Override color expression with a condition
    style.color = {
        conditions : [
            ['${height} > 2', 'color("cyan")'],
            ['true', 'color("blue")']
        ]
    };

#### disableDepthTestDistance : StyleExpression
Scene/Cesium3DTileStyle.js 1315

Gets or sets the `StyleExpression` object used to evaluate the style's `disableDepthTestDistance` property. Alternatively a string or object defining a number style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Number`.

This expression is only applicable to point features in a Vector tile.

##### Example:

    var style = new Cesium.Cesium3DTileStyle();
    // Override disableDepthTestDistance expression with a string
    style.disableDepthTestDistance = '1000.0';
    style.disableDepthTestDistance.evaluate(feature); // returns a Number

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### distanceDisplayCondition : StyleExpression
Scene/Cesium3DTileStyle.js 1079

Gets or sets the `StyleExpression` object used to evaluate the style's `distanceDisplayCondition` property. Alternatively a string or object defining a vec2 style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Cartesian2`.

This expression is only applicable to point features in a Vector tile.

##### Example:

    var style = new Cesium.Cesium3DTileStyle();
    // Override distanceDisplayCondition expression with a string
    style.distanceDisplayCondition = 'vec2(0.0, 5.5e6)';
    style.distanceDisplayCondition.evaluate(feature); // returns a Cartesian2

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### font : StyleExpression
Scene/Cesium3DTileStyle.js 723

Gets or sets the `StyleExpression` object used to evaluate the style's `font` property. Alternatively a string or object defining a string style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `String`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium3DTileStyle({
        font : '(${Temperature} > 90) ? "30px Helvetica" : "24px Helvetica"'
    });
    style.font.evaluate(feature); // returns a String

    var style = new Cesium.Cesium3DTileStyle();
    // Override font expression with a custom function
    style.font = {
        evaluate : function(feature) {
            return '24px Helvetica';
        }
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### heightOffset : StyleExpression
Scene/Cesium3DTileStyle.js 1128

Gets or sets the `StyleExpression` object used to evaluate the style's `heightOffset` property. Alternatively a string or object defining a number style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Number`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium.Cesium3DTileStyle();
    // Override heightOffset expression with a string
    style.heightOffset = '2.0';

    var style = new Cesium.Cesium3DTileStyle();
    // Override heightOffset expression with a condition
    style.heightOffset = {
        conditions : [
            ['${height} > 2', '4.0'],
            ['true', '2.0']
        ]
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### horizontalOrigin : StyleExpression
Scene/Cesium3DTileStyle.js 1364

Gets or sets the `StyleExpression` object used to evaluate the style's `horizontalOrigin` property. Alternatively a string or object defining a number style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `HorizontalOrigin`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium3DTileStyle({
        horizontalOrigin : HorizontalOrigin.LEFT
    });
    style.horizontalOrigin.evaluate(feature); // returns a HorizontalOrigin

    var style = new Cesium.Cesium3DTileStyle();
    // Override horizontalOrigin expression with a custom function
    style.horizontalOrigin = {
        evaluate : function(feature) {
            return HorizontalOrigin.CENTER;
        }
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### image : StyleExpression
Scene/Cesium3DTileStyle.js 1275

Gets or sets the `StyleExpression` object used to evaluate the style's `image` property. Alternatively a string or object defining a string style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `String`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium3DTileStyle({
        image : '(${Temperature} > 90) ? "/url/to/image1" : "/url/to/image2"'
    });
    style.image.evaluate(feature); // returns a String

    var style = new Cesium.Cesium3DTileStyle();
    // Override image expression with a custom function
    style.image = {
        evaluate : function(feature) {
            return '/url/to/image';
        }
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### labelColor : StyleExpression
Scene/Cesium3DTileStyle.js 576

Gets or sets the `StyleExpression` object used to evaluate the style's `labelColor` property. Alternatively a string or object defining a color style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Color`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium.Cesium3DTileStyle();
    // Override labelColor expression with a string
    style.labelColor = 'color("blue")';

    var style = new Cesium.Cesium3DTileStyle();
    // Override labelColor expression with a condition
    style.labelColor = {
        conditions : [
            ['${height} > 2', 'color("cyan")'],
            ['true', 'color("blue")']
        ]
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### labelHorizontalOrigin : StyleExpression
Scene/Cesium3DTileStyle.js 1462

Gets or sets the `StyleExpression` object used to evaluate the style's `labelHorizontalOrigin` property. Alternatively a string or object defining a number style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `HorizontalOrigin`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium3DTileStyle({
        labelHorizontalOrigin : HorizontalOrigin.LEFT
    });
    style.labelHorizontalOrigin.evaluate(feature); // returns a HorizontalOrigin

    var style = new Cesium.Cesium3DTileStyle();
    // Override labelHorizontalOrigin expression with a custom function
    style.labelHorizontalOrigin = {
        evaluate : function(feature) {
            return HorizontalOrigin.CENTER;
        }
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### labelOutlineColor : StyleExpression
Scene/Cesium3DTileStyle.js 625

Gets or sets the `StyleExpression` object used to evaluate the style's `labelOutlineColor` property. Alternatively a string or object defining a color style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Color`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium.Cesium3DTileStyle();
    // Override labelOutlineColor expression with a string
    style.labelOutlineColor = 'color("blue")';

    var style = new Cesium.Cesium3DTileStyle();
    // Override labelOutlineColor expression with a condition
    style.labelOutlineColor = {
        conditions : [
            ['${height} > 2', 'color("cyan")'],
            ['true', 'color("blue")']
        ]
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### labelOutlineWidth : StyleExpression
Scene/Cesium3DTileStyle.js 674

Gets or sets the `StyleExpression` object used to evaluate the style's `labelOutlineWidth` property. Alternatively a string or object defining a number style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Number`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium.Cesium3DTileStyle();
    // Override labelOutlineWidth expression with a string
    style.labelOutlineWidth = '5';

    var style = new Cesium.Cesium3DTileStyle();
    // Override labelOutlineWidth expression with a condition
    style.labelOutlineWidth = {
        conditions : [
            ['${height} > 2', '5'],
            ['true', '0']
        ]
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### labelStyle : StyleExpression
Scene/Cesium3DTileStyle.js 772

Gets or sets the `StyleExpression` object used to evaluate the style's `label style` property. Alternatively a string or object defining a number style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `LabelStyle`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium3DTileStyle({
        labelStyle : '(${Temperature} > 90) ? ' + LabelStyle.FILL_AND_OUTLINE + ' : ' + LabelStyle.FILL
    });
    style.labelStyle.evaluate(feature); // returns a LabelStyle

    var style = new Cesium.Cesium3DTileStyle();
    // Override labelStyle expression with a custom function
    style.labelStyle = {
        evaluate : function(feature) {
            return LabelStyle.FILL;
        }
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### labelText : StyleExpression
Scene/Cesium3DTileStyle.js 821

Gets or sets the `StyleExpression` object used to evaluate the style's `labelText` property. Alternatively a string or object defining a string style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `String`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium3DTileStyle({
        labelText : '(${Temperature} > 90) ? ">90" : "<=90"'
    });
    style.labelText.evaluate(feature); // returns a String

    var style = new Cesium.Cesium3DTileStyle();
    // Override labelText expression with a custom function
    style.labelText = {
        evaluate : function(feature) {
            return 'Example label text';
        }
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### labelVerticalOrigin : StyleExpression
Scene/Cesium3DTileStyle.js 1511

Gets or sets the `StyleExpression` object used to evaluate the style's `labelVerticalOrigin` property. Alternatively a string or object defining a number style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `VerticalOrigin`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium3DTileStyle({
        labelVerticalOrigin : VerticalOrigin.TOP
    });
    style.labelVerticalOrigin.evaluate(feature); // returns a VerticalOrigin

    var style = new Cesium.Cesium3DTileStyle();
    // Override labelVerticalOrigin expression with a custom function
    style.labelVerticalOrigin = {
        evaluate : function(feature) {
            return VerticalOrigin.CENTER;
        }
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### meta : StyleExpression
Scene/Cesium3DTileStyle.js 1545

Gets or sets the object containing application-specific expression that can be explicitly evaluated, e.g., for display in a UI.

##### Example:

    var style = new Cesium3DTileStyle({
        meta : {
            description : '"Building id ${id} has height ${Height}."'
        }
    });
    style.meta.description.evaluate(feature); // returns a String with the substituted variables

#### pointOutlineColor : StyleExpression
Scene/Cesium3DTileStyle.js 478

Gets or sets the `StyleExpression` object used to evaluate the style's `pointOutlineColor` property. Alternatively a string or object defining a color style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Color`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium.Cesium3DTileStyle();
    // Override pointOutlineColor expression with a string
    style.pointOutlineColor = 'color("blue")';

    var style = new Cesium.Cesium3DTileStyle();
    // Override pointOutlineColor expression with a condition
    style.pointOutlineColor = {
        conditions : [
            ['${height} > 2', 'color("cyan")'],
            ['true', 'color("blue")']
        ]
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### pointOutlineWidth : StyleExpression
Scene/Cesium3DTileStyle.js 527

Gets or sets the `StyleExpression` object used to evaluate the style's `pointOutlineWidth` property. Alternatively a string or object defining a number style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Number`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium.Cesium3DTileStyle();
    // Override pointOutlineWidth expression with a string
    style.pointOutlineWidth = '5';

    var style = new Cesium.Cesium3DTileStyle();
    // Override pointOutlineWidth expression with a condition
    style.pointOutlineWidth = {
        conditions : [
            ['${height} > 2', '5'],
            ['true', '0']
        ]
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### pointSize : StyleExpression
Scene/Cesium3DTileStyle.js 428

Gets or sets the `StyleExpression` object used to evaluate the style's `pointSize` property. Alternatively a string or object defining a point size style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Number`.

This expression is only applicable to point features in a Vector tile or a Point Cloud tile.

##### Examples:

    var style = new Cesium3DTileStyle({
        pointSize : '(${Temperature} > 90) ? 2.0 : 1.0'
    });
    style.pointSize.evaluate(feature); // returns a Number

    var style = new Cesium.Cesium3DTileStyle();
    // Override pointSize expression with a custom function
    style.pointSize = {
        evaluate : function(feature) {
            return 1.0;
        }
    };

    var style = new Cesium.Cesium3DTileStyle();
    // Override pointSize expression with a number
    style.pointSize = 1.0;

    var style = new Cesium.Cesium3DTileStyle();
    // Override pointSize expression with a string
    style.pointSize = '${height} / 10';

    var style = new Cesium.Cesium3DTileStyle();
    // Override pointSize expression with a condition
    style.pointSize =  {
        conditions : [
            ['${height} > 2', '1.0'],
            ['true', '2.0']
        ]
    };

#### readonlyready : Boolean
Scene/Cesium3DTileStyle.js 224

When `true`, the style is ready and its expressions can be evaluated. When a style is constructed with an object, as opposed to a url, this is `true` immediately.

Default Value: `false`

#### readonlyreadyPromise : Promise.<Cesium3DTileStyle>
Scene/Cesium3DTileStyle.js 238

Gets the promise that will be resolved when the the style is ready and its expressions can be evaluated.

#### scaleByDistance : StyleExpression
Scene/Cesium3DTileStyle.js 999

Gets or sets the `StyleExpression` object used to evaluate the style's `scaleByDistance` property. Alternatively a string or object defining a vec4 style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Cartesian4`.

This expression is only applicable to point features in a Vector tile.

##### Example:

    var style = new Cesium.Cesium3DTileStyle();
    // Override scaleByDistance expression with a string
    style.scaleByDistance = 'vec4(1.5e2, 2.0, 1.5e7, 0.5)';
    style.scaleByDistance.evaluate(feature); // returns a Cartesian4

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### show : StyleExpression
Scene/Cesium3DTileStyle.js 297

Gets or sets the `StyleExpression` object used to evaluate the style's `show` property. Alternatively a boolean, string, or object defining a show style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return or convert to a `Boolean`.

This expression is applicable to all tile formats.

##### Examples:

    var style = new Cesium3DTileStyle({
        show : '(regExp("^Chest").test(${County})) && (${YearBuilt} >= 1970)'
    });
    style.show.evaluate(feature); // returns true or false depending on the feature's properties

    var style = new Cesium.Cesium3DTileStyle();
    // Override show expression with a custom function
    style.show = {
        evaluate : function(feature) {
            return true;
        }
    };

    var style = new Cesium.Cesium3DTileStyle();
    // Override show expression with a boolean
    style.show = true;
    };

    var style = new Cesium.Cesium3DTileStyle();
    // Override show expression with a string
    style.show = '${Height} > 0';
    };

    var style = new Cesium.Cesium3DTileStyle();
    // Override show expression with a condition
    style.show = {
        conditions: [
            ['${height} > 2', 'false'],
            ['true', 'true']
        ];
    };

#### readonlystyle : Object
Scene/Cesium3DTileStyle.js 201

Gets the object defining the style using the 3D Tiles Styling language.

Default Value: `{}`

#### translucencyByDistance : StyleExpression
Scene/Cesium3DTileStyle.js 1039

Gets or sets the `StyleExpression` object used to evaluate the style's `translucencyByDistance` property. Alternatively a string or object defining a vec4 style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `Cartesian4`.

This expression is only applicable to point features in a Vector tile.

##### Example:

    var style = new Cesium.Cesium3DTileStyle();
    // Override translucencyByDistance expression with a string
    style.translucencyByDistance = 'vec4(1.5e2, 1.0, 1.5e7, 0.2)';
    style.translucencyByDistance.evaluate(feature); // returns a Cartesian4

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.

#### verticalOrigin : StyleExpression
Scene/Cesium3DTileStyle.js 1413

Gets or sets the `StyleExpression` object used to evaluate the style's `verticalOrigin` property. Alternatively a string or object defining a number style can be used. The getter will return the internal `Expression` or `ConditionsExpression`, which may differ from the value provided to the setter.

The expression must return a `VerticalOrigin`.

This expression is only applicable to point features in a Vector tile.

##### Examples:

    var style = new Cesium3DTileStyle({
        verticalOrigin : VerticalOrigin.TOP
    });
    style.verticalOrigin.evaluate(feature); // returns a VerticalOrigin

    var style = new Cesium.Cesium3DTileStyle();
    // Override verticalOrigin expression with a custom function
    style.verticalOrigin = {
        evaluate : function(feature) {
            return VerticalOrigin.CENTER;
        }
    };

##### Experimental

This feature is using part of the 3D Tiles spec that is not final and is subject to change without Cesium's standard deprecation policy.