Scene properties expressions

Update the orientation of a graphic using expressions based on its attributes.

Use case

Instead of reading the attribute and changing the rotation on the symbol for a single graphic (a manual CPU operation), you can bind the rotation to an expression that applies to the whole overlay (an automatic GPU operation). This usually results in a noticeable performance boost (smooth rotations).

How to use the sample

Adjust the heading and pitch sliders to rotate the cone.

How it works

1. Create a new graphics overlay.
2. Create a simple renderer and set its scene properties.
3. Set the heading expression to [HEADING].
4. Apply the renderer to the graphics overlay.
5. Create a graphic and add it to the overlay.
6. To update the graphic's rotation, update the HEADING or PITCH property in the graphic's attributes.

Relevant API

• Graphic.Attributes
• GraphicsOverlay
• SceneProperties
• SceneProperties.HeadingExpression
• SceneProperties.PitchExpression
• SimpleRenderer
• SimpleRenderer.SceneProperties

Tags

3D, expression, graphics, heading, pitch, rotation, scene, symbology

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<UserControl x:Class="ArcGISRuntime.WPF.Samples.ScenePropertiesExpressions.ScenePropertiesExpressions"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             xmlns:esri="http://schemas.esri.com/arcgis/runtime/2013">
    <Grid>
        <esri:SceneView x:Name="MySceneView" />
        <Border Style="{StaticResource BorderStyle}">
            <StackPanel>
                <Label Content="Heading:" />
                <Slider x:Name="HeadingSlider"
                        Maximum="360"
                        Minimum="0" />
                <Label Content="Pitch:" />
                <Slider x:Name="PitchSlider"
                        Maximum="90"
                        Minimum="-90" />
            </StackPanel>
        </Border>
    </Grid>
</UserControl>