我对WPF极为陌生，正在尝试创建一个应用程序，在其中将一个地球仪绘制在一个标签中，在第二个标签中绘制一个平面图。我可以使用以下代码在测试应用程序中绘制地球仪：
<Window x:Class="SphereTutorial.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:SphereTutorial"
xmlns:earth="clr-namespace:SphereTutorial.Globe"
mc:Ignorable="d"
Title="MainWindow" Height="350" Width="525">
<Grid>
<Grid.Resources>
<earth:SphereMeshGenerator x:Key="SphereGeometrySource1"/>
<MeshGeometry3D x:Key="SphereGeometry1"
Positions="{Binding Source={StaticResource
SphereGeometrySource1}, Path=Geometry.Positions}"
TriangleIndices="{Binding Source={StaticResource
SphereGeometrySource1}, Path=Geometry.TriangleIndices}"
TextureCoordinates="{Binding Source={StaticResource SphereGeometrySource1}, Path=Geometry.TextureCoordinates}"/>
</Grid.Resources>
<Grid.Background>
Black
</Grid.Background>
<Viewport3D x:Name="mainScene3D">
<Viewport3D.Camera>
<PerspectiveCamera x:Name="mainCam" LookDirection="-1,0,0" Position="5,0,0" UpDirection="0,1,0"/>
</Viewport3D.Camera>
<ModelVisual3D>
<ModelVisual3D.Content>
<Model3DGroup>
<AmbientLight Color="White"/>
<GeometryModel3D Geometry="{StaticResource SphereGeometry1}">
<GeometryModel3D.Material>
<MaterialGroup>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<ImageBrush ImageSource="H:\C#\SphereTutorial\SphereTutorial\Images\Earth.jpg"/>
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</MaterialGroup>
</GeometryModel3D.Material>
</GeometryModel3D>
</Model3DGroup>
</ModelVisual3D.Content>
</ModelVisual3D>
</Viewport3D>
</Grid>
</Window>
我使用以下代码从this link中提取了球形代码：
namespace VenProp.Sphere3D
{
class SphereMeshGenerator
{
private int _slices = 100;
private int _stacks = 50;
private Point3D _center = new Point3D();
private double _radius = 1;
public int Slices
{
get { return _slices; }
set { _slices = value; }
}
public int Stacks
{
get { return _stacks; }
set { _stacks = value; }
}
public Point3D Center
{
get { return _center; }
set { _center = value; }
}
public double Radius
{
get { return _radius; }
set { _radius = value; }
}
public MeshGeometry3D Geometry
{
get
{
return CalculateMesh();
}
}
private MeshGeometry3D CalculateMesh()
{
MeshGeometry3D mesh = new MeshGeometry3D();
for (int stack = 0; stack <= Stacks; stack++)
{
double phi = Math.PI / 2 - stack * Math.PI / Stacks;
double y = _radius * Math.Sin(phi);
double scale = -_radius * Math.Cos(phi);
for (int slice = 0; slice <= Slices; slice++)
{
double theta = slice * 2 * Math.PI / Slices;
double x = scale * Math.Sin(theta);
double z = scale * Math.Cos(theta);
Vector3D normal = new Vector3D(x, y, z);
mesh.Normals.Add(normal);
mesh.Positions.Add(normal + Center);
mesh.TextureCoordinates.Add(new Point((double)slice / Slices, (double)stack / Stacks));
}
}
for (int stack = 0; stack <= Stacks; stack++)
{
int top = (stack + 0) * (Slices + 1);
int bot = (stack + 1) * (Slices + 1);
for (int slice = 0; slice < Slices; slice++)
{
if (stack != 0)
{
mesh.TriangleIndices.Add(top + slice);
mesh.TriangleIndices.Add(bot + slice);
mesh.TriangleIndices.Add(top + slice + 1);
}
if (stack != Stacks - 1)
{
mesh.TriangleIndices.Add(top + slice + 1);
mesh.TriangleIndices.Add(bot + slice);
mesh.TriangleIndices.Add(bot + slice + 1);
}
}
}
return mesh;
}
}
}
我能够验证它是否可以使用此方法。但是，当我去在应用程序中实现相同的逻辑时，事情就崩溃了。由于某些原因，它仅开始在边缘渲染图像。我感觉这可能与进入DockPanel有关吗？ 2D图像在其DockPanel中运行良好。这是无效的代码：
<Window x:Class="VenProp.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
xmlns:local="clr-namespace:VenProp"
xmlns:sphere="clr-namespace:VenProp.Sphere3D"
mc:Ignorable="d"
Title="VenProp"
Height="{Binding Source={x:Static SystemParameters.PrimaryScreenHeight}, Converter={local:RatioConverter}, ConverterParameter='0.9' }"
Width="{Binding Source={x:Static SystemParameters.PrimaryScreenWidth}, Converter={local:RatioConverter}, ConverterParameter='0.9' }"
WindowStartupLocation="CenterScreen"
Background="#FFE4E4E4">
<!-- Window Resources -->
<Window.Resources>
<sphere:SphereMeshGenerator x:Key="SphereGeometrySource"/>
<MeshGeometry3D x:Key="SphereGeometry"
Positions="{Binding Source={StaticResource SphereGeometrySource}, Path=Geometry.Positions}"
TriangleIndices="{Binding Source={StaticResource SphereGeometrySource}, Path=Geometry.TriangleIndicies}"
TextureCoordinates="{Binding Source={StaticResource SphereGeometrySource}, Path=Geometry.TextureCoordinates}"/>
</Window.Resources>
<!-- Overall Container is VERTICAL-->
<DockPanel>
<!-- Top Menu -->
<Menu DockPanel.Dock="Top" HorizontalAlignment="Left" BorderBrush="Black">
<MenuItem Header="_File"></MenuItem>
</Menu>
<!-- Main toolbar -->
<ToolBar DockPanel.Dock="Top">
<Button>
<!-- Put image here-->
</Button>
<Button Content="Button2"/>
</ToolBar>
<!-- StatusBar -->
<StatusBar x:Name="statusBar" DockPanel.Dock="Bottom" />
<!-- Inner container is horizontal -->
<DockPanel>
<Separator Width="2" Foreground="{x:Null}" Background="{x:Null}"/>
<!-- Throw Tree into a dock panel with its label-->
<StackPanel Width="310" DockPanel.Dock="Left" HorizontalAlignment="Left" Margin="0,0,0,2" Background="#FFE4E4E4">
<Label Content="Object Browser" FontSize="12" Background="LightGray"/>
<TreeView x:Name="ObjectBrowser" BorderThickness="2" Height="620" DockPanel.Dock="Top">
<TreeView.BitmapEffect>
<BevelBitmapEffect BevelWidth="5" Relief="0.4" LightAngle="320"/>
</TreeView.BitmapEffect>
</TreeView>
</StackPanel>
</DockPanel>
<Separator Width="10" Background="{x:Null}" Foreground="{x:Null}" RenderTransformOrigin="-0.45,0.541" />
<!-- Tabs for graphics windows -->
<TabControl x:Name="tabGraphics" BorderThickness="5">
<TabControl.BitmapEffect>
<BevelBitmapEffect BevelWidth="15" Relief="0.4"/>
</TabControl.BitmapEffect>
<!-- 3D Earth Model -->
<TabItem x:Name="graphics3D" Header="3D Graphics">
<DockPanel Background="Black">
<Viewport3D x:Name="mainScene3D">
<!--Camera-->
<Viewport3D.Camera>
<PerspectiveCamera x:Name="mainCam" LookDirection="-1,0,0" Position="5,0,0" UpDirection="0,1,0"/>
</Viewport3D.Camera>
<!--Earth Model-->
<ModelVisual3D>
<ModelVisual3D.Content>
<Model3DGroup>
<AmbientLight Color="White"/>
<GeometryModel3D Geometry="{StaticResource SphereGeometry}">
<GeometryModel3D.Material>
<MaterialGroup>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<ImageBrush ImageSource="H:\C#\VenProp\VenProp\Images\Earth.jpg"/>
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</MaterialGroup>
</GeometryModel3D.Material>
</GeometryModel3D>
</Model3DGroup>
</ModelVisual3D.Content>
</ModelVisual3D>
</Viewport3D>
</DockPanel>
</TabItem>
<TabItem x:Name="graphics2D" Header="2D Graphics">
<DockPanel Background="Gray">
<Image Source="H:\C#\VenProp\VenProp\Images/Earth.jpg"/>
</DockPanel>
</TabItem>
</TabControl>
</DockPanel>
</Window>
为了进行测试，如果将ImageBrush替换为SolidColorBrush，则会发生相同的效果。
有人知道发生了什么吗？另外，我是Stack Overflow的新手，因此，如果有什么可以使我的问题更加清楚的事情，请告诉我。预先感谢您的帮助！
最佳答案
始终检查“输出”窗口中是否存在绑定错误，如下所示：
System.Windows.Data错误：40：BindingExpression路径错误：在“对象”“ MeshGeometry3D”（HashCode = 33785274）”上找不到“ TriangleIndicies”属性。 BindingExpression：Path = Geometry.TriangleIndicies; DataItem ='SphereMeshGenerator'（HashCode = 18281552）;目标元素是'MeshGeometry3D'（HashCode = 34085817）;目标属性是“ TriangleIndices”（类型“ Int32Collection”）
从TriangleIndicies更改为TriangleIndices后，它工作得很好：
关于c# - ModelVisual3D无法在DockPanel中正确呈现，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/43616581/