I want to render a cube with a texture mapped over it. This is my Texture:
The areas with text "Empty" should not be used.
This is my Viewport3D:
<Viewport3D>
<Viewport3D.Camera>
<PerspectiveCamera FarPlaneDistance="100" LookDirection="22,-10,-10" UpDirection="0,1,0" NearPlaneDistance="1" Position="-20,15,15" FieldOfView="60"/>
</Viewport3D.Camera>
<Viewport3D.Children>
<ModelVisual3D>
<ModelVisual3D.Content>
<DirectionalLight Color="White" Direction="-2,-3,-1"/>
</ModelVisual3D.Content>
</ModelVisual3D>
<ModelVisual3D>
<ModelVisual3D.Content>
<DirectionalLight Color="White" Direction="2,3,1"/>
</ModelVisual3D.Content>
</ModelVisual3D>
<ModelVisual3D>
<ModelVisual3D.Content>
<GeometryModel3D>
<GeometryModel3D.Geometry>
<MeshGeometry3D
Positions="
0,0,0 8,0,0 0,8,0 8,8,0
0,0,0 0,0,8 0,8,0 0,8,8
0,0,0 8,0,0 0,0,8 8,0,8
8,0,0 8,8,8 8,0,8 8,8,0
0,0,8 8,0,8 0,8,8 8,8,8
0,8,0 0,8,8 8,8,0 8,8,8"
TriangleIndices="
0,2,1 1,2,3
4,5,6 6,5,7
8,9,10 9,11,10
12,13,14 12,15,13
16,17,18 19,18,17
20,21,22 22,21,23"
TextureCoordinates="
0.5,0 0,0.25 0.25,0 1,0.5
0.25,0.25 0,0.25 0.25,0 0,0 ">
</MeshGeometry3D>
</GeometryModel3D.Geometry>
<GeometryModel3D.Material>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<ImageBrush ImageSource="cube.png"/>
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</GeometryModel3D.Material>
</GeometryModel3D>
</ModelVisual3D.Content>
</ModelVisual3D>
</Viewport3D.Children>
</Viewport3D>
The result:
First I wanted to try to get only the front side. I only got as far as showing the first rectangle. Unfortunately I can't manage to select another rectangle and it's mirrored too.
CodePudding user response：
In this post
For each face, I use a ViewBox to define just the part of the image used for that face. Here's the source code (note there are scrollbars you can use spin the image around and verify all sides look right):
<DockPanel>
<ScrollBar Name="horz"
DockPanel.Dock="Bottom"
Orientation="Horizontal"
Minimum="-180"
Maximum="180"
LargeChange="10"
SmallChange="1" />
<ScrollBar Name="vert"
DockPanel.Dock="Right"
Orientation="Vertical"
Minimum="-180"
Maximum="180"
LargeChange="10"
SmallChange="1" />
<Viewport3D>
<Viewport3D.Camera>
<PerspectiveCamera Position="-2 2 4" LookDirection="2 -2 -4" FieldOfView="60" />
</Viewport3D.Camera>
<Viewport3D.Children>
<ModelVisual3D>
<ModelVisual3D.Content>
<Model3DGroup>
<AmbientLight Color="White" />
<!-- Unit cube: front -->
<GeometryModel3D>
<GeometryModel3D.Geometry>
<MeshGeometry3D
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"
TriangleIndices=" 0 2 1, 1 2 3"
TextureCoordinates="0 0, 1 0, 0 1, 1 1" />
</GeometryModel3D.Geometry>
<GeometryModel3D.Material>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<ImageBrush ImageSource="cube.png" Viewbox="0.25,0.5,0.25,0.5" />
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</GeometryModel3D.Material>
<GeometryModel3D.BackMaterial>
<DiffuseMaterial Brush="Black"/>
</GeometryModel3D.BackMaterial>
</GeometryModel3D>
<!-- Unit cube: back -->
<GeometryModel3D>
<GeometryModel3D.Geometry>
<MeshGeometry3D
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"
TriangleIndices=" 0 2 1, 1 2 3"
TextureCoordinates="0 0, 1 0, 0 1, 1 1"/>
</GeometryModel3D.Geometry>
<GeometryModel3D.Material>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<ImageBrush ImageSource="cube.png" Viewbox="0.75,0.5,0.25,0.5" />
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</GeometryModel3D.Material>
<GeometryModel3D.BackMaterial>
<DiffuseMaterial Brush="Black"/>
</GeometryModel3D.BackMaterial>
</GeometryModel3D>
<!-- Unit cube: left -->
<GeometryModel3D>
<GeometryModel3D.Geometry>
<MeshGeometry3D
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"
TriangleIndices=" 0 2 1, 1 2 3"
TextureCoordinates="0 0, 1 0, 0 1, 1 1"/>
</GeometryModel3D.Geometry>
<GeometryModel3D.Material>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<ImageBrush ImageSource="cube.png" Viewbox="0,0.5,0.25,.5" />
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</GeometryModel3D.Material>
<GeometryModel3D.BackMaterial>
<DiffuseMaterial Brush="Black"/>
</GeometryModel3D.BackMaterial>
</GeometryModel3D>
<!-- Unit cube: right -->
<GeometryModel3D>
<GeometryModel3D.Geometry>
<MeshGeometry3D
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"
TriangleIndices=" 0 2 1, 1 2 3"
TextureCoordinates="0 0, 1 0, 0 1, 1 1"/>
</GeometryModel3D.Geometry>
<GeometryModel3D.Material>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<ImageBrush ImageSource="cube.png" Viewbox="0.5,0.5,0.25,.5" />
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</GeometryModel3D.Material>
<GeometryModel3D.BackMaterial>
<DiffuseMaterial Brush="Black"/>
</GeometryModel3D.BackMaterial>
</GeometryModel3D>
<!-- Unit cube: top -->
<GeometryModel3D>
<GeometryModel3D.Geometry>
<MeshGeometry3D
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"
TriangleIndices=" 0 2 1, 1 2 3"
TextureCoordinates="0 0, 1 0, 0 1, 1 1"/>
</GeometryModel3D.Geometry>
<GeometryModel3D.Material>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<ImageBrush ImageSource="cube.png" Viewbox="0.25,0.0,0.25,.5" />
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</GeometryModel3D.Material>
<GeometryModel3D.BackMaterial>
<DiffuseMaterial Brush="Black"/>
</GeometryModel3D.BackMaterial>
</GeometryModel3D>
<!-- Unit cube: bottom. -->
<GeometryModel3D>
<GeometryModel3D.Geometry>
<MeshGeometry3D
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"
TriangleIndices=" 0 2 1, 1 2 3"
TextureCoordinates="0 0, 1 0, 0 1, 1 1"/>
</GeometryModel3D.Geometry>
<GeometryModel3D.Material>
<DiffuseMaterial>
<DiffuseMaterial.Brush>
<ImageBrush ImageSource="cube.png" Viewbox="0.5,0.0,0.25,.5" />
</DiffuseMaterial.Brush>
</DiffuseMaterial>
</GeometryModel3D.Material>
<GeometryModel3D.BackMaterial>
<DiffuseMaterial Brush="Black"/>
</GeometryModel3D.BackMaterial>
</GeometryModel3D>
</Model3DGroup>
</ModelVisual3D.Content>
<ModelVisual3D.Transform>
<Transform3DGroup>
<RotateTransform3D>
<RotateTransform3D.Rotation>
<AxisAngleRotation3D Axis="0 1 0" Angle="{Binding ElementName=horz, Path=Value}" />
</RotateTransform3D.Rotation>
</RotateTransform3D>
<RotateTransform3D>
<RotateTransform3D.Rotation>
<AxisAngleRotation3D Axis="1 0 0" Angle="{Binding ElementName=vert, Path=Value}" />
</RotateTransform3D.Rotation>
</RotateTransform3D>
</Transform3DGroup>
</ModelVisual3D.Transform>
</ModelVisual3D>
</Viewport3D.Children>
</Viewport3D>
</DockPanel>