3D 应用程序未渲染场景

Question

我查看了有关 3D 图形的 Microsoft 页面，甚至尝试绘制他们的示例圆锥体，但屏幕上没有显示任何内容。我已经多次查看代码，但似乎找不到问题所在...

XAML代码：

<Window x:Class="WpfApp2.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:WpfApp2"
        mc:Ignorable="d"
        Title="MainWindow" Height="450" Width="800">
    <Grid>
        <Grid.Resources>
            <MeshGeometry3D x:Key="meshPyramid" Positions="0 75 0  -50 0 50  50 0 50  50 0 -50" TriangleIndices="0 1 2  0 2 3"></MeshGeometry3D>
            <MeshGeometry3D x:Key="desertFloor" Positions="-9999,0,-9999  9999,0,-9999  9999,0,9999  -9999,0,9999" TextureCoordinates="0,0  1,0  1,1  0,1" TriangleIndices="0 1 3  1 2 3"></MeshGeometry3D>
            <DiffuseMaterial x:Key="matFont" Brush="Black">
            </DiffuseMaterial>
            <DiffuseMaterial x:Key="backFont" Brush="Firebrick"></DiffuseMaterial>
            <DiffuseMaterial x:Key="texSand">
                <DiffuseMaterial.Brush>
                    <ImageBrush ImageSource="C:\Users\Julko\Documents\csharpprojects\wpfdProj\WpfApp2\WpfApp2\sand.jpg"></ImageBrush>
                </DiffuseMaterial.Brush>
            </DiffuseMaterial>
        </Grid.Resources>
        
        <Viewport3D Name ="viewPort" Width="640" Height="480">
            <Viewport3D.Camera>
                <PerspectiveCamera Position="57, 240, 41" LookDirection="-0.2, 0, -0.9" UpDirection="0, 1, 0" NearPlaneDistance="0.02" FarPlaneDistance="1000" FieldOfView="45">
                </PerspectiveCamera>
            </Viewport3D.Camera>
       
            <ModelVisual3D>
                <ModelVisual3D.Content>
                    <Model3DGroup>
                        <DirectionalLight Color="GreenYellow" Direction="1, -1, -1"/>
                        <GeometryModel3D>
                            <GeometryModel3D.Geometry>
                                <MeshGeometry3D Positions="0.293893 -0.5 0.404509  0.475528 -0.5 0.154509  0 0.5 0  0.475528 -0.5 0.154509  0 0.5 0  0 0.5 0  0.475528 -0.5 0.154509  0.475528 -0.5 -0.154509  0 0.5 0  0.475528 -0.5 -0.154509  0 0.5 0  0 0.5 0  0.475528 -0.5 -0.154509  0.293893 -0.5 -0.404509  0 0.5 0  0.293893 -0.5 -0.404509  0 0.5 0  0 0.5 0  0.293893 -0.5 -0.404509  0 -0.5 -0.5  0 0.5 0  0 -0.5 -0.5  0 0.5 0  0 0.5 0  0 -0.5 -0.5  -0.293893 -0.5 -0.404509  0 0.5 0  -0.293893 -0.5 -0.404509  0 0.5 0  0 0.5 0  -0.293893 -0.5 -0.404509  -0.475528 -0.5 -0.154509  0 0.5 0  -0.475528 -0.5 -0.154509  0 0.5 0  0 0.5 0  -0.475528 -0.5 -0.154509  -0.475528 -0.5 0.154509  0 0.5 0  -0.475528 -0.5 0.154509  0 0.5 0  0 0.5 0  -0.475528 -0.5 0.154509  -0.293892 -0.5 0.404509  0 0.5 0  -0.293892 -0.5 0.404509  0 0.5 0  0 0.5 0  -0.293892 -0.5 0.404509  0 -0.5 0.5  0 0.5 0  0 -0.5 0.5  0 0.5 0  0 0.5 0  0 -0.5 0.5  0.293893 -0.5 0.404509  0 0.5 0  0.293893 -0.5 0.404509  0 0.5 0  0 0.5 0  " 
    Normals="0.7236065,0.4472139,0.5257313  0.2763934,0.4472138,0.8506507  0.5308242,0.4294462,0.7306172  0.2763934,0.4472138,0.8506507  0,0.4294458,0.9030925  0.5308242,0.4294462,0.7306172  0.2763934,0.4472138,0.8506507  -0.2763934,0.4472138,0.8506507  0,0.4294458,0.9030925  -0.2763934,0.4472138,0.8506507  -0.5308242,0.4294462,0.7306172  0,0.4294458,0.9030925  -0.2763934,0.4472138,0.8506507  -0.7236065,0.4472139,0.5257313  -0.5308242,0.4294462,0.7306172  -0.7236065,0.4472139,0.5257313  -0.858892,0.429446,0.279071  -0.5308242,0.4294462,0.7306172  -0.7236065,0.4472139,0.5257313  -0.8944269,0.4472139,0  -0.858892,0.429446,0.279071  -0.8944269,0.4472139,0  -0.858892,0.429446,-0.279071  -0.858892,0.429446,0.279071  -0.8944269,0.4472139,0  -0.7236065,0.4472139,-0.5257313  -0.858892,0.429446,-0.279071  -0.7236065,0.4472139,-0.5257313  -0.5308242,0.4294462,-0.7306172  -0.858892,0.429446,-0.279071  -0.7236065,0.4472139,-0.5257313  -0.2763934,0.4472138,-0.8506507  -0.5308242,0.4294462,-0.7306172  -0.2763934,0.4472138,-0.8506507  0,0.4294458,-0.9030925  -0.5308242,0.4294462,-0.7306172  -0.2763934,0.4472138,-0.8506507  0.2763934,0.4472138,-0.8506507  0,0.4294458,-0.9030925  0.2763934,0.4472138,-0.8506507  0.5308249,0.4294459,-0.7306169  0,0.4294458,-0.9030925  0.2763934,0.4472138,-0.8506507  0.7236068,0.4472141,-0.5257306  0.5308249,0.4294459,-0.7306169  0.7236068,0.4472141,-0.5257306  0.8588922,0.4294461,-0.27907  0.5308249,0.4294459,-0.7306169  0.7236068,0.4472141,-0.5257306  0.8944269,0.4472139,0  0.8588922,0.4294461,-0.27907  0.8944269,0.4472139,0  0.858892,0.429446,0.279071  0.8588922,0.4294461,-0.27907  0.8944269,0.4472139,0  0.7236065,0.4472139,0.5257313  0.858892,0.429446,0.279071  0.7236065,0.4472139,0.5257313  0.5308242,0.4294462,0.7306172  0.858892,0.429446,0.279071  "                   TriangleIndices="0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 " />
                            </GeometryModel3D.Geometry></GeometryModel3D>
                        <GeometryModel3D Geometry='{StaticResource meshPyramid}' Material='{StaticResource matFont}' BackMaterial='{StaticResource backFont}'/>
                        <GeometryModel3D Geometry='{StaticResource desertFloor}' Material='{StaticResource texSand}'/>
                    </Model3DGroup>
                </ModelVisual3D.Content>
            </ModelVisual3D>
            
        </Viewport3D>
    </Grid>
</Window>

Answer 1

摄像头位置错误。改变它，例如到

PerspectiveCamera Position="57, 41, 240"

你会看到金字塔。只是玩 Position, UpDirection, LookDirection.
也可以通过 meshPyramid:

交换 Material 和 BackMaterial

<GeometryModel3D Geometry='{StaticResource meshPyramid}' Material='{StaticResource backFont}' BackMaterial='{StaticResource matFont}'/>

3D 应用程序未渲染场景

3D Application is not rendering the scene

c#

3d

wpf

graphics