Viewport3D在简单网格上的表现

时间:2012-03-02 10:50:41

标签: wpf xaml viewport3d

我创建了一个全屏WPF Canvas,表示时间线。只组成时间线的可见部分,因此(实际上)没有UI元素位于可见范围之外。

Time line 2D

我正在尝试使用Viewport3D为此时间线添加透视图。目前的结果如下:

Time line 3D

您可以通过拖动来左右滚动时间线。 2D版本的性能非常好。但是,一旦使用Viewport3D将画布放置在Viewport2DVisual3D内,性能就会急剧下降。

这不像我正在渲染一个复杂的网格,这个性能下降来自哪里,我可以阻止吗?

为了让您了解3D视角是如何实现的,我将在此处添加XAML代码,遗憾的是它不能单独使用。

<Grid Background="{StaticResource BackgroundBrush}">
    <Viewport3D ClipToBounds="False">
        <Viewport3D.Camera>
            <PerspectiveCamera
                Position="0 0 5"
                LookDirection="0.4 0 -1"
                UpDirection="0 1 0" />
        </Viewport3D.Camera>

        <ContainerUIElement3D>
            <ModelUIElement3D>
                <AmbientLight Color="White" />
            </ModelUIElement3D>
        </ContainerUIElement3D>

        <Viewport2DVisual3D>
            <Viewport2DVisual3D.Geometry>
                <MeshGeometry3D
                    TriangleIndices="0,1,2 2,3,0"
                    TextureCoordinates="0 0, 0 1, 1 1, 1 0">
                    <MeshGeometry3D.Positions>
                        <MultiBinding Converter="{StaticResource AspectRatioToPositions}">
                            <Binding ElementName="TimeLineContainer" Path="Width" />
                            <Binding ElementName="TimeLineContainer" Path="Height" />
                        </MultiBinding>
                    </MeshGeometry3D.Positions>
                </MeshGeometry3D>
            </Viewport2DVisual3D.Geometry>

            <Viewport2DVisual3D.Material>
                <DiffuseMaterial
                    Viewport2DVisual3D.IsVisualHostMaterial="True"
                    Brush="White" />
            </Viewport2DVisual3D.Material>

            <Grid 
                x:Name="TimeLineContainer"
                Width="1650" Height="600"
                ClipToBounds="True"
                Background="{StaticResource TimeLineBrush}"
                Behaviors:MouseBehavior.LeftClickDragCommand="ActivityOverview:ActivityOverviewWindow.MouseDragged"
                MouseWheel="OnMouseWheel"
                MouseMove="OnMouseMoved">

                <ActivityOverview:TimeLineControl x:Name="TimeLine" Focusable="True">
                    <ActivityOverview:TimeLineControl.CommandBindings>
                        <CommandBinding
                            Command="ActivityOverview:ActivityOverviewWindow.MouseDragged"                  
                            Executed="MoveTimeLine" />
                    </ActivityOverview:TimeLineControl.CommandBindings>
                </ActivityOverview:TimeLineControl>

            </Grid>
        </Viewport2DVisual3D>
    </Viewport3D>
</Grid>

2 个答案:

答案 0 :(得分:2)

当您尝试显示渲染耗时的内容时,使用Viewport2DVisual3D性能可能会很慢。在我的例子中似乎就是这种情况。

因此,您可以设置Viewport2DVisual3D的{​​{3}}。

<Viewport2DVisual3D>
    <Viewport2DVisual3D.CacheMode>
        <BitmapCache />
    </Viewport2DVisual3D.CacheMode>        
    ...
</Viewport2DVisual3D>

从Windows Vista开始,默认情况下启用消除锯齿功能。禁用此功能也有助于提高性能。奇怪的是,这会对这样一个简单的网格(两个三角形)产生很大的影响,但在我的电脑上,确实如此!

<Viewport3D ClipToBounds="False" RenderOptions.EdgeMode="Aliased">

结合这两个设置,我得到了很大的改进。

答案 1 :(得分:0)

大家好,你可以使用<OrthographicCamera Position="0 0 5" LookDirection="0.4 0 -1" UpDirection="0 1 0" />。请检查下面的代码

<Grid Background="{StaticResource BackgroundBrush}">
<Viewport3D ClipToBounds="False">
    <Viewport3D.Camera>
        <OrthographicCamera
            Position="0 0 5"
            LookDirection="0.4 0 -1"
            UpDirection="0 1 0" />
    </Viewport3D.Camera>

    <ContainerUIElement3D>
        <ModelUIElement3D>
            <AmbientLight Color="White" />
        </ModelUIElement3D>
    </ContainerUIElement3D>

    <Viewport2DVisual3D>
        <Viewport2DVisual3D.Geometry>
            <MeshGeometry3D
                TriangleIndices="0,1,2 2,3,0"
                TextureCoordinates="0 0, 0 1, 1 1, 1 0">
                <MeshGeometry3D.Positions>
                    <MultiBinding Converter="{StaticResource AspectRatioToPositions}">
                        <Binding ElementName="TimeLineContainer" Path="Width" />
                        <Binding ElementName="TimeLineContainer" Path="Height" />
                    </MultiBinding>
                </MeshGeometry3D.Positions>
            </MeshGeometry3D>
        </Viewport2DVisual3D.Geometry>

        <Viewport2DVisual3D.Material>
            <DiffuseMaterial
                Viewport2DVisual3D.IsVisualHostMaterial="True"
                Brush="White" />
        </Viewport2DVisual3D.Material>

        <Grid 
            x:Name="TimeLineContainer"
            Width="1650" Height="600"
            ClipToBounds="True"
            Background="{StaticResource TimeLineBrush}"
            Behaviors:MouseBehavior.LeftClickDragCommand="ActivityOverview:ActivityOverviewWindow.MouseDragged"
            MouseWheel="OnMouseWheel"
            MouseMove="OnMouseMoved">

            <ActivityOverview:TimeLineControl x:Name="TimeLine" Focusable="True">
                <ActivityOverview:TimeLineControl.CommandBindings>
                    <CommandBinding
                        Command="ActivityOverview:ActivityOverviewWindow.MouseDragged"                  
                        Executed="MoveTimeLine" />
                </ActivityOverview:TimeLineControl.CommandBindings>
            </ActivityOverview:TimeLineControl>

        </Grid>
    </Viewport2DVisual3D>
</Viewport3D>