ArcGIS Runtime其他性能

地图加速显示

 

ArcGIS Runtime采用了新的渲染引擎，新的渲染引擎使得我们在浏览和显示地图的时候非常快，该功能是因为ArcGIS Runtime的Map对象有一个显示加速的属性，如下图：

 

将UseAcceleratedDisplay属性设置为true之后可以让显示的速度加快。所有的动态地图服务和切片地图服务，该功能都支持，如果让Map的所有图层都加速显示，只要按下面的设置就行：

 

 

<esri:Mapx:Name="_map"UseAcceleratedDisplay="True">

    <esri:ArcGISTiledMapServiceLayerID="World Topo Map"

               Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer"/>

    <esri:GraphicsLayerID="Fire Trucks"/>

</esri:Map>

 

 

一个Map中可能有多个图层，但是我们可以设置让一些特定的图层启用该功能，代码如下：

 

 

 

<esri:Mapx:Name="_map">

    <esri:AcceleratedDisplayLayers>

        <esri:ArcGISTiledMapServiceLayerID="World Topo Map"

               Url="http://services.arcgisonline.com/ArcGIS/rest/services/World_Topo_Map/MapServer"/>

        <esri:GraphicsLayerID="Fire Trucks"/>

    </esri:AcceleratedDisplayLayers>

    <esri:GraphicsLayerID="Census Data">

        <esri:GraphicsLayer.Clusterer>

           <esri:FlareClusterer/>

        </esri:GraphicsLayer.Clusterer>

    </esri:GraphicsLayer>

</esri:Map>

 

ArcGIS Runtime 高性能

ArcGIS Runtime有很高的性能，这种性能使得我们可以在Map上显示成千上万个点，并且在拖动的时候很流畅，下图为10000个动画符号的效果：

 

点符号代码如下：

  <esri:MarkerSymbol x:Key="ResonateMarkerSymbol">

                <esri:MarkerSymbol.ControlTemplate>

                    <ControlTemplate>

                        <Canvas>

                            <VisualStateManager.VisualStateGroups>

                                <VisualStateGroup x:Name="CommonStates">

                                    <VisualState x:Name="Normal">

                                       <Storyboard RepeatBehavior="Forever">

                                           <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Fill).(GradientBrush.GradientStops)[2].(GradientStop.Offset)" Storyboard.TargetName="ellipse">

                                               <EasingDoubleKeyFrame KeyTime="0" Value="0.372"/>

                                               <EasingDoubleKeyFrame KeyTime="0:0:00.5" Value="0.453"/>

                                               <EasingDoubleKeyFrame KeyTime="0:0:01" Value="0.704"/>

                                                <EasingDoubleKeyFrame KeyTime="0:0:01.5" Value="0.968"/>

                                           </DoubleAnimationUsingKeyFrames>

                                           <DoubleAnimationUsingKeyFrames Storyboard.TargetProperty="(Shape.Fill).(GradientBrush.GradientStops)[4].(GradientStop.Offset)" Storyboard.TargetName="ellipse">

                                               <EasingDoubleKeyFrame KeyTime="0:0:00.5" Value="0.58"/>

                                                <EasingDoubleKeyFrame KeyTime="0:0:01" Value="0.784"/>

                                               <EasingDoubleKeyFrame KeyTime="0:0:01.5" Value="0.992"/>

                                           </DoubleAnimationUsingKeyFrames>

                                           <DoubleAnimation BeginTime="0"

                                                Storyboard.TargetName="ellipse" Storyboard.TargetProperty="(UIElement.Opacity)"

                                                From="1" To="0" Duration="0:0:01.5" />

                                        </Storyboard>

                                    </VisualState>

                                </VisualStateGroup>

                            </VisualStateManager.VisualStateGroups>

                            <Ellipse x:Name="ellipse" Height="70" StrokeThickness="3" Width="70"

                                     Canvas.Left="-35" Canvas.Top="-35">

                                <Ellipse.Fill>

                                    <RadialGradientBrush>

                                       <GradientStop Color="#FFC82727"/>

                                       <GradientStop Color="#FFE2E296" Offset="0.255"/>

                                       <GradientStop Color="#FFE2E296" Offset="0.115"/>

                                        <GradientStop Color="#FFE2E296" Offset="0.381"/>

                                       <GradientStop Color="#00F3EBE9" Offset="0.667"/>

                                    </RadialGradientBrush>

                                </Ellipse.Fill>

                            </Ellipse>

 

                        </Canvas>

                    </ControlTemplate>

                </esri:MarkerSymbol.ControlTemplate>

            </esri:MarkerSymbol>