Bonjour,
j'utilise ce code pour faire du wpf 3d
Code XAML : Sélectionner tout - Visualiser dans une fenêtre à part
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 <Viewport3D x:Name="viewport3D"
                    HorizontalAlignment="Center"
                    Height="300"
                    Focusable="true"
                    VerticalAlignment="Center"
                    Width="300"
                    RenderTransformOrigin="0.5,0.5"
                    ClipToBounds="False">
            <Viewport3D.Camera>
                <PerspectiveCamera FieldOfView="45"
                                   FarPlaneDistance="100"
                                   LookDirection="0,0,-4"
                                   NearPlaneDistance="0.1"
                                   UpDirection="0,1,0"
                                   Position="0,0,4" />
            </Viewport3D.Camera>
            <Viewport2DVisual3D>
                <Viewport2DVisual3D.Transform>
                    <Transform3DGroup>
                        <TranslateTransform3D OffsetZ="1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <ScaleTransform3D ScaleZ="2"
                                          ScaleY="2"
                                          ScaleX="2" />
                        <RotateTransform3D d:EulerAngles="0,0,0">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D Axis="0,1,0"
                                                     Angle="0" />
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                        <RotateTransform3D d:EulerAngles="0,0,0">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D Axis="1,0,0"
                                                     Angle="0" />
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                        <TranslateTransform3D OffsetZ="-1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <TranslateTransform3D OffsetZ="0"
                                              OffsetY="0" />
                    </Transform3DGroup>
                </Viewport2DVisual3D.Transform>
                <Viewport2DVisual3D.Geometry>
                    <MeshGeometry3D Positions="-1,1,0 -1,-1,0 1,-1,0 1,1,0"
                                    TextureCoordinates="0,0 0,1 1,1 1,0"
                                    TriangleIndices="0 1 2 0 2 3" />
                </Viewport2DVisual3D.Geometry>
                <Viewport2DVisual3D.Material>
                    <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True"
                                     Brush="White" />
                </Viewport2DVisual3D.Material>
                <Grid x:Name="Side1"
                      Background="red">
                    <DockPanel>
                        <Button DockPanel.Dock="Top"
                                Content="reset"
                                Click="Button_Click" />
                        <ListBox>
                            <ListBoxItem>alpha</ListBoxItem>
                            <ListBoxItem>beta</ListBoxItem>
                            <ListBoxItem>gamma</ListBoxItem>
                            <ListBoxItem>zota</ListBoxItem>
                        </ListBox>
                    </DockPanel>
                </Grid>
            </Viewport2DVisual3D>
            <Viewport2DVisual3D>
                <Viewport2DVisual3D.Transform>
                    <Transform3DGroup>
                        <TranslateTransform3D OffsetZ="1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <ScaleTransform3D ScaleZ="1"
                                          ScaleY="1"
                                          ScaleX="1" />
                        <RotateTransform3D d:EulerAngles="0,90,0">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D Axis="0,1,0"
                                                     Angle="90" />
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                        <RotateTransform3D d:EulerAngles="0,0,0">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D Axis="1,0,0"
                                                     Angle="0" />
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                        <TranslateTransform3D OffsetZ="-1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <TranslateTransform3D OffsetZ="0"
                                              OffsetX="0" />
                    </Transform3DGroup>
                </Viewport2DVisual3D.Transform>
                <Viewport2DVisual3D.Geometry>
                    <MeshGeometry3D Positions="-1,1,0 -1,-1,0 1,-1,0 1,1,0"
                                    TextureCoordinates="0,0 0,1 1,1 1,0"
                                    TriangleIndices="0 1 2 0 2 3" />
                </Viewport2DVisual3D.Geometry>
                <Viewport2DVisual3D.Material>
                    <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True"
                                     Brush="Red" />
                </Viewport2DVisual3D.Material>
                <Grid x:Name="Side2">
                    <ListBox>
                        <ListBoxItem>alpha</ListBoxItem>
                        <ListBoxItem>beta</ListBoxItem>
                        <ListBoxItem>gamma</ListBoxItem>
                        <ListBoxItem>zota</ListBoxItem>
                    </ListBox>
                </Grid>
            </Viewport2DVisual3D>
            <Viewport2DVisual3D>
                <Viewport2DVisual3D.Transform>
                    <Transform3DGroup>
                        <TranslateTransform3D OffsetZ="1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <ScaleTransform3D ScaleZ="1"
                                          ScaleY="1"
                                          ScaleX="1" />
                        <RotateTransform3D d:EulerAngles="0,180,0">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D Axis="0,1,0"
                                                     Angle="180" />
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                        <RotateTransform3D d:EulerAngles="0,0,0">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D Axis="1,0,0"
                                                     Angle="0" />
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                        <TranslateTransform3D OffsetZ="-1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <TranslateTransform3D OffsetZ="0"
                                              OffsetX="0" />
                    </Transform3DGroup>
                </Viewport2DVisual3D.Transform>
                <Viewport2DVisual3D.Geometry>
                    <MeshGeometry3D Positions="-1,1,0 -1,-1,0 1,-1,0 1,1,0"
                                    TextureCoordinates="0,0 0,1 1,1 1,0"
                                    TriangleIndices="0 1 2 0 2 3" />
                </Viewport2DVisual3D.Geometry>
                <Viewport2DVisual3D.Material>
                    <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True"
                                     Brush="Red" />
                </Viewport2DVisual3D.Material>
                <Grid x:Name="Side3">
                    <ListBox>
                        <ListBoxItem>alpha</ListBoxItem>
                        <ListBoxItem>beta</ListBoxItem>
                        <ListBoxItem>gamma</ListBoxItem>
                        <ListBoxItem>zota</ListBoxItem>
                    </ListBox>
                </Grid>
            </Viewport2DVisual3D>
            <Viewport2DVisual3D>
                <Viewport2DVisual3D.Transform>
                    <Transform3DGroup>
                        <TranslateTransform3D OffsetZ="1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <ScaleTransform3D ScaleZ="1"
                                          ScaleY="1"
                                          ScaleX="1" />
                        <RotateTransform3D d:EulerAngles="0,270,0">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D Axis="0,1,0"
                                                     Angle="270" />
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                        <RotateTransform3D d:EulerAngles="0,0,0">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D Axis="1,0,0"
                                                     Angle="0" />
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                        <TranslateTransform3D OffsetZ="-1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <TranslateTransform3D OffsetZ="0"
                                              OffsetX="0" />
                    </Transform3DGroup>
                </Viewport2DVisual3D.Transform>
                <Viewport2DVisual3D.Geometry>
                    <MeshGeometry3D Positions="-1,1,0 -1,-1,0 1,-1,0 1,1,0"
                                    TextureCoordinates="0,0 0,1 1,1 1,0"
                                    TriangleIndices="0 1 2 0 2 3" />
                </Viewport2DVisual3D.Geometry>
                <Viewport2DVisual3D.Material>
                    <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True"
                                     Brush="Red" />
                </Viewport2DVisual3D.Material>
                <Grid x:Name="Side4">
                    <ListBox>
                        <ListBoxItem>alpha</ListBoxItem>
                        <ListBoxItem>beta</ListBoxItem>
                        <ListBoxItem>gamma</ListBoxItem>
                        <ListBoxItem>zota</ListBoxItem>
                    </ListBox>
                </Grid>
            </Viewport2DVisual3D>
            <Viewport2DVisual3D>
                <Viewport2DVisual3D.Transform>
                    <Transform3DGroup>
                        <TranslateTransform3D OffsetZ="1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <ScaleTransform3D ScaleZ="1"
                                          ScaleY="1"
                                          ScaleX="1" />
                        <RotateTransform3D d:EulerAngles="0,0,0">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D Axis="1,0,0"
                                                     Angle="90" />
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                        <TranslateTransform3D OffsetZ="-1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <TranslateTransform3D OffsetZ="0"
                                              OffsetY="0" />
                    </Transform3DGroup>
                </Viewport2DVisual3D.Transform>
                <Viewport2DVisual3D.Geometry>
                    <MeshGeometry3D Positions="-1,1,0 -1,-1,0 1,-1,0 1,1,0"
                                    TextureCoordinates="0,0 0,1 1,1 1,0"
                                    TriangleIndices="0 1 2 0 2 3" />
                </Viewport2DVisual3D.Geometry>
                <Viewport2DVisual3D.Material>
                    <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True"
                                     Brush="White" />
                </Viewport2DVisual3D.Material>
                <Grid x:Name="Side5">
                    <ListBox>
                        <ListBoxItem>alpha</ListBoxItem>
                        <ListBoxItem>beta</ListBoxItem>
                        <ListBoxItem>gamma</ListBoxItem>
                        <ListBoxItem>zota</ListBoxItem>
                    </ListBox>
                </Grid>
            </Viewport2DVisual3D>
            <Viewport2DVisual3D>
                <Viewport2DVisual3D.Transform>
                    <Transform3DGroup>
                        <TranslateTransform3D OffsetZ="1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <ScaleTransform3D ScaleZ="1" />
                        <RotateTransform3D d:EulerAngles="0,0,0">
                            <RotateTransform3D.Rotation>
                                <AxisAngleRotation3D Axis="1,0,0"
                                                     Angle="270" />
                            </RotateTransform3D.Rotation>
                        </RotateTransform3D>
                        <TranslateTransform3D OffsetZ="-1"
                                              OffsetX="0"
                                              OffsetY="0" />
                        <TranslateTransform3D OffsetZ="0"
                                              OffsetY="0" />
                    </Transform3DGroup>
                </Viewport2DVisual3D.Transform>
                <Viewport2DVisual3D.Geometry>
                    <MeshGeometry3D Positions="-1,1,0 -1,-1,0 1,-1,0 1,1,0"
                                    TextureCoordinates="0,0 0,1 1,1 1,0"
                                    TriangleIndices="0 1 2 0 2 3" />
                </Viewport2DVisual3D.Geometry>
                <Viewport2DVisual3D.Material>
                    <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True"
                                     Brush="White" />
                </Viewport2DVisual3D.Material>
                <Grid x:Name="Side6">
                    <ListBox>
                        <ListBoxItem>alpha</ListBoxItem>
                        <ListBoxItem>beta</ListBoxItem>
                        <ListBoxItem>gamma</ListBoxItem>
                        <ListBoxItem>zota</ListBoxItem>
                    </ListBox>
                </Grid>
            </Viewport2DVisual3D>
            <ModelVisual3D>
                <ModelVisual3D.Content>
                    <AmbientLight Color="White" />
                </ModelVisual3D.Content>
            </ModelVisual3D>
        </Viewport3D>

je sais faire une rotation de la camera ou des lumières
mais j'aimerais savoir comment faire une rotation de tous les Viewport2DVisual3D par rapport au centre
pour garder l'éclairage et la lumière

merci