带有正射相机剪辑的Viewport3D
带有正射相机剪辑的Viewport3D
提问于 2014-10-14 11:15:37
当使用ViewPort3D与一个正交相机，三维模型是剪裁，如你可以看到在下面的第二个链接。这就像视图是基于透视相机而不是显示它背后的东西，即使它使用的是正射相机。
整个3D模型的视图
透视视图与正射视图
用于生成上面图片的代码
Used code to generate pictures above (toggling Orthographic to True/False)
<Window x:Class="HelixToolkitTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:helix="http://helix-toolkit.org/wpf"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<GeometryModel3D x:Key="GeometryModel">
<GeometryModel3D.Geometry>
<MeshGeometry3D
TriangleIndices="0,1,2 3,4,5 "
Normals="0,0,1 0,0,1 0,0,1 0,0,1 0,0,1 0,0,1 "
TextureCoordinates="0,0 1,0 1,1 1,1 0,1 0,0 "
Positions="-0.5,-0.5,0.5 0.5,-0.5,0.5 0.5,0.5,0.5 0.5,0.5,0.5 -0.5,0.5,0.5 -0.5,-0.5,0.5 " />
</GeometryModel3D.Geometry>
<GeometryModel3D.Material>
<MaterialGroup>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<LinearGradientBrush StartPoint="0,0.5" EndPoint="1,0.5">
<LinearGradientBrush.GradientStops>
<GradientStop Color="Yellow" Offset="0" />
<GradientStop Color="Red" Offset="0.25" />
<GradientStop Color="Blue" Offset="0.75" />
<GradientStop Color="LimeGreen" Offset="1" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</MaterialGroup>
</GeometryModel3D.Material>
<GeometryModel3D.Transform>
<ScaleTransform3D ScaleX="50" ScaleY="1" ScaleZ="1"/>
</GeometryModel3D.Transform>
</GeometryModel3D>
<DirectionalLight x:Key="DirectionalLight" Color="#FFFFFF" Direction="-0.612372,-0.5,-0.612372" />
</Window.Resources>
<UniformGrid Columns="3">
<GroupBox Header="Perspective camera">
<Viewport3D>
<Viewport3D.Camera>
<PerspectiveCamera FarPlaneDistance="Infinity" NearPlaneDistance="0.1" LookDirection="12.064,-1.167,-0.831" UpDirection="-0.73,0.071,0.679"
Position="-12.064,1.167,0.831"/>
</Viewport3D.Camera>
<ModelVisual3D Content="{StaticResource DirectionalLight}"/>
<ModelVisual3D Content="{StaticResource GeometryModel}"/>
</Viewport3D>
</GroupBox>
<GroupBox Header="Orthographic camera">
<Viewport3D>
<Viewport3D.Camera>
<OrthographicCamera FarPlaneDistance="Infinity" NearPlaneDistance="0.1" LookDirection="12.064,-1.167,-0.831" UpDirection="-0.73,0.071,0.679"
Position="-12.064,1.167,0.831" Width="9.313"/>
</Viewport3D.Camera>
<ModelVisual3D Content="{StaticResource DirectionalLight}"/>
<ModelVisual3D Content="{StaticResource GeometryModel}"/>
</Viewport3D>
</GroupBox>对如何解决这个问题有什么想法吗？
谢谢,
编辑:我实际上找到了解决方案，您只需将正交相机的NearPlaneDistance设置为-Infinity，请参见下面的代码：
<Window x:Class="HelixToolkitTest.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:helix="http://helix-toolkit.org/wpf"
Title="MainWindow" Height="350" Width="525">
<Window.Resources>
<GeometryModel3D x:Key="GeometryModel">
<GeometryModel3D.Geometry>
<MeshGeometry3D
TriangleIndices="0,1,2 3,4,5 "
Normals="0,0,1 0,0,1 0,0,1 0,0,1 0,0,1 0,0,1 "
TextureCoordinates="0,0 1,0 1,1 1,1 0,1 0,0 "
Positions="-0.5,-0.5,0.5 0.5,-0.5,0.5 0.5,0.5,0.5 0.5,0.5,0.5 -0.5,0.5,0.5 -0.5,-0.5,0.5 " />
</GeometryModel3D.Geometry>
<GeometryModel3D.Material>
<MaterialGroup>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<LinearGradientBrush StartPoint="0,0.5" EndPoint="1,0.5">
<LinearGradientBrush.GradientStops>
<GradientStop Color="Yellow" Offset="0" />
<GradientStop Color="Red" Offset="0.25" />
<GradientStop Color="Blue" Offset="0.75" />
<GradientStop Color="LimeGreen" Offset="1" />
</LinearGradientBrush.GradientStops>
</LinearGradientBrush>
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</MaterialGroup>
</GeometryModel3D.Material>
<GeometryModel3D.Transform>
<ScaleTransform3D ScaleX="50" ScaleY="1" ScaleZ="1"/>
</GeometryModel3D.Transform>
</GeometryModel3D>
<DirectionalLight x:Key="DirectionalLight" Color="#FFFFFF" Direction="-0.612372,-0.5,-0.612372" />
</Window.Resources>
<UniformGrid Columns="3">
<GroupBox Header="Perspective camera">
<Viewport3D>
<Viewport3D.Camera>
<PerspectiveCamera FarPlaneDistance="Infinity" NearPlaneDistance="0.1" LookDirection="12.064,-1.167,-0.831" UpDirection="-0.73,0.071,0.679"
Position="-12.064,1.167,0.831"/>
</Viewport3D.Camera>
<ModelVisual3D Content="{StaticResource DirectionalLight}"/>
<ModelVisual3D Content="{StaticResource GeometryModel}"/>
</Viewport3D>
</GroupBox>
<GroupBox Header="Orthographic camera">
<Viewport3D>
<Viewport3D.Camera>
<OrthographicCamera FarPlaneDistance="Infinity" NearPlaneDistance="-Infinity" LookDirection="12.064,-1.167,-0.831" UpDirection="-0.73,0.071,0.679"
Position="-12.064,1.167,0.831" Width="9.313"/>
</Viewport3D.Camera>
<ModelVisual3D Content="{StaticResource DirectionalLight}"/>
<ModelVisual3D Content="{StaticResource GeometryModel}"/>
</Viewport3D>
</GroupBox>回答 1
Stack Overflow用户
发布于 2014-12-02 18:50:18
我和你有同样的问题。对几个解决方案进行了测试，最后我找到了解决方案。
您必须使用FarPlaneDistance增加或定义PerspectiveCamera.的属性
祝好运
页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/26359489
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