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изменить 3D линию на 3D плоскость в WPF 3D

#c# #wpf

#c# #wpf

Вопрос:

Я использую C # в VS 2019 для разработки 3D-проекта WPF. Я создал две 3D-линии в viewpoint3D, которые будут перемещаться при перемещении ползунка. Заказчик хочет, чтобы мы, я, изменили 3D-линию на 3D-плоскость, чтобы поперечное сечение 3D-объекта можно было показывать при перемещении плоскости для вырезания 3D-объекта.

Как я мог бы нарисовать 3D-плоскость вертикально в плоскости X-Y и вырезать 3D-объект, чтобы показать поперечное сечение необработанного 3D-объекта?

фото

XAML:

 <UserControl x:Class="STIGenericReport.UserControl"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:tool3d="clr-namespace:_3DTools;assembly=3DTools"
Height="407" Width="633" Background="White" BorderBrush="White" Focusable="False">
<Grid Name="maingrid" Background="White" Height="405" Width="616" MinWidth="500">
    <Grid.ColumnDefinitions>
        <ColumnDefinition Width="619*" />
        <ColumnDefinition Width="10*" />
    </Grid.ColumnDefinitions>
    <Grid.RowDefinitions>
        <RowDefinition Height ="574*" />
        <RowDefinition Height="26" MinHeight="16" />
    </Grid.RowDefinitions>
    <Viewport3D Name="mainViewport" ClipToBounds = "False"  
                IsHitTestVisible="false"
                RenderOptions.EdgeMode="Aliased" Margin="12,52,144,47">
        <Viewport3D.Camera>
            <OrthographicCamera x:Name="camera" Width="2"
                FarPlaneDistance="10"
                NearPlaneDistance="1" 
                LookDirection="0,0,-1"
                UpDirection="0,1,0"
                Position="0,0,2" />
        </Viewport3D.Camera>
        <Viewport3D.Children>
            <ModelVisual3D x:Name="Light1">
                <ModelVisual3D.Content>
                    <DirectionalLight Color="White" Direction="1, 1, -1" />
                </ModelVisual3D.Content>
            </ModelVisual3D>
            <ModelVisual3D x:Name="Light2">
                <ModelVisual3D.Content>
                    <DirectionalLight Color="White" Direction="-1, 1, -1" />
                </ModelVisual3D.Content>
            </ModelVisual3D>
            <ModelVisual3D x:Name="Light3">
                <ModelVisual3D.Content>
                    <DirectionalLight Color="White" Direction="0,-1,-0.5" />
                </ModelVisual3D.Content>
            </ModelVisual3D>
            <tool3d:ScreenSpaceLines3D Points ="0,100,0,0,-100,0" Color="Black" Thickness="2">
                <tool3d:ScreenSpaceLines3D.Transform>
                    <TranslateTransform3D OffsetX="{Binding ElementName=slider, Path=Value}" OffsetY="0" OffsetZ="0" />
                </tool3d:ScreenSpaceLines3D.Transform>
            </tool3d:ScreenSpaceLines3D>
            <tool3d:ScreenSpaceLines3D Points ="100,0,0,-100,0,0" Color="Black" Thickness="2">
                <tool3d:ScreenSpaceLines3D.Transform>
                    <TranslateTransform3D OffsetX="0" OffsetY="{Binding ElementName=slider1, Path=Value}" OffsetZ="0" />
                </tool3d:ScreenSpaceLines3D.Transform>
            </tool3d:ScreenSpaceLines3D>
        </Viewport3D.Children>
    </Viewport3D>

    <Canvas x:Name="canvasOn3D" Background="#00E6FFFF" 
            Margin="20,52,102,18"></Canvas>
    <Label Content="Trayinfo" FontSize="16" FontWeight="Bold" Height="34" HorizontalAlignment="Left" Margin="192,0,0,0" Name="lblTrayinfo" VerticalAlignment="Top" Width="194" />
    <Button Height="25" HorizontalAlignment="Left" Margin="499,0,0,257" Name="btn9" VerticalAlignment="Bottom" Width="50" Background="White" BorderThickness="0" BorderBrush="White" />
    <Button Height="25" HorizontalAlignment="Left" Margin="499,0,0,232" Name="btn8" VerticalAlignment="Bottom" Width="50" Background="White" BorderThickness="0" BorderBrush="White" />
    <Button HorizontalAlignment="Left" Margin="499,149,0,207" Name="btn7" Width="50" Background="White" BorderThickness="0" BorderBrush="White" />
    <Button Height="25" HorizontalAlignment="Left" Margin="499,0,0,182" Name="btn6" VerticalAlignment="Bottom" Width="50" Background="White" BorderThickness="0" BorderBrush="White" />
    <Button Height="25" HorizontalAlignment="Left" Margin="499,0,0,157" Name="btn5" VerticalAlignment="Bottom" Width="50" Background="White" BorderThickness="0" BorderBrush="White" />
    <Button Height="25" HorizontalAlignment="Left" Margin="499,0,0,132" Name="btn4" VerticalAlignment="Bottom" Width="50" Background="White" BorderThickness="0" BorderBrush="White" />
    <Button Height="25" HorizontalAlignment="Left" Margin="499,0,0,107" Name="btn3" VerticalAlignment="Bottom" Width="50" Background="White" BorderThickness="0" BorderBrush="White" />
    <Button Height="25" HorizontalAlignment="Left" Margin="499,0,0,82" Name="btn2" VerticalAlignment="Bottom" Width="50" Background="White" BorderThickness="0" BorderBrush="White" />
    <Button Height="25" HorizontalAlignment="Left" Margin="499,0,0,57" Name="btn1" VerticalAlignment="Bottom" Width="50" Background="White" BorderThickness="0" BorderBrush="White" />
    <Button Height="25" HorizontalAlignment="Left" Margin="499,0,0,282" Name="btn10" VerticalAlignment="Bottom" Width="50" Background="White" BorderThickness="0" BorderBrush="White" />
    <Label Height="25" HorizontalAlignment="Right" Margin="0,0,12,57" Name="lbl1" VerticalAlignment="Bottom" Width="45" Background="White" BorderBrush="White" />
    <Label Height="25" HorizontalAlignment="Right" Margin="0,0,12,82" Name="lbl2" VerticalAlignment="Bottom" Width="45" Background="White" BorderBrush="White" />
    <Label Height="25" HorizontalAlignment="Right" Margin="0,0,12,107" Name="lbl3" VerticalAlignment="Bottom" Width="45" Background="White" BorderBrush="White" />
    <Label Height="25" HorizontalAlignment="Right" Margin="0,0,12,132" Name="lbl4" VerticalAlignment="Bottom" Width="45" Background="White" BorderBrush="White" />
    <Label Height="25" HorizontalAlignment="Right" Margin="0,0,12,157" Name="lbl5" VerticalAlignment="Bottom" Width="45" Background="White" BorderBrush="White" />
    <Label Height="25" HorizontalAlignment="Right" Margin="0,0,12,182" Name="lbl6" VerticalAlignment="Bottom" Width="45" Background="White" BorderBrush="White" />
    <Label Height="25" HorizontalAlignment="Right" Margin="0,0,12,207" Name="lbl7" VerticalAlignment="Bottom" Width="45" Background="White" BorderBrush="White" />
    <Label Height="25" HorizontalAlignment="Right" Margin="0,0,12,232" Name="lbl8" VerticalAlignment="Bottom" Width="45" Background="White" BorderBrush="White" />
    <Label Height="25" HorizontalAlignment="Right" Margin="0,0,12,257" Name="lbl9" VerticalAlignment="Bottom" Width="45" Background="White" BorderBrush="White" />
    <Label Height="25" HorizontalAlignment="Right" Margin="0,0,12,282" Name="lbl10" VerticalAlignment="Bottom" Width="45" Background="White" BorderBrush="White" />
    <Label Content="Pacakage info" HorizontalAlignment="Center" Width="Auto" Height="32" Name="lblPkgname" FontSize="16" FontWeight="Bold" Margin="204,378,286,-5" Grid.RowSpan="2" />
    <Slider x:Name="slider" Minimum="-1" Maximum="1" HorizontalAlignment="Left" Margin="65,363,0,0" VerticalAlignment="Top" Width="345" Grid.RowSpan="2" RenderTransformOrigin="0.434,0.409"/>
    <Slider x:Name="slider1" Minimum="-1" Maximum="1" HorizontalAlignment="Left" Margin="-115,182,0,0" VerticalAlignment="Top" RenderTransformOrigin="0.5,0.5" Width="338">
        <Slider.RenderTransform>
            <TransformGroup>
                <ScaleTransform/>
                <SkewTransform/>
                <RotateTransform Angle="270"/>
                <TranslateTransform/>
            </TransformGroup>
        </Slider.RenderTransform>
    </Slider>
</Grid>

Комментарии:

1. Это можно сделать в pixel shader (фрагментный шейдер). Если мир Z пикселя находится вне диапазона, clip() пиксель. И плоскость может быть сгенерирована с помощью геометрического шейдера. Но я не знаю, как получить доступ к шейдерам в WPF 3D.

2. Я тоже не знаю…….

3. Пожалуйста, уточните более подробно

4. learn.microsoft.com/en-us/dotnet/api/… Есть только встроенные шейдеры. Я думаю, это невозможно. Попробуйте вместо этого helix toolkit. Это открытый исходный код на основе SharpDX.