Question

WPF texture mapping problem

Asked by: MareiAlgarni

Hello,

In my XAML code below I have six triangles of MeshGeometry3D which has been displayed OK. The problem is that when I want to map a DrawingBrush (EllipseGeometry) to my material and ImageBrush to back material they can just be mapped to the first two triangles only on each side as shown on pictures attached here. I want actually to map them so they will appear as one ellipse and one picture on each side (one picture stretched  on the six triangles as back material and one ellipse stretched on the six triangles as material).

Note that you may need to reference the well known 3D tools library from http://www.codeplex.com/3DTools and change picture path to run code correctly.

I apprciate all help.

Thanks,
Marei

<Window x:Class="WpfApplication1.Window1"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    xmlns:tools="clr-namespace:_3DTools;assembly=3DTools"
    Title="Window1" Height="500" Width="700">
    <Grid Background="Black">
        <tools:TrackballDecorator Name="tb1">
            <Viewport3D Name="viewport3D1">
                <Viewport3D.Camera>
                    <PerspectiveCamera x:Name="camera1" 
                                       Position="3 3 3" 
                                       LookDirection="-3 -3 -3"
                                       UpDirection="0,1,0"
                                       FieldOfView="45"
                                       >
                    </PerspectiveCamera>
                </Viewport3D.Camera>
 
                <ModelVisual3D>
                    <ModelVisual3D.Content>
                        <DirectionalLight x:Name="directionalLight1" Direction="-3,-3,-3"/>
                    </ModelVisual3D.Content>
                </ModelVisual3D>
 
                <ModelVisual3D>
                    <ModelVisual3D.Content>
                        <DirectionalLight x:Name="directionalLight2" Direction="3,3,3"/>
                    </ModelVisual3D.Content>
                </ModelVisual3D>
 
                <ModelVisual3D>
                    <ModelVisual3D.Content>
                        <DirectionalLight x:Name="directionalLight3" Direction="-3,3,0"/>
                    </ModelVisual3D.Content>
                </ModelVisual3D>
                <ModelVisual3D>
                    <ModelVisual3D.Content>
                        <GeometryModel3D>
                            <GeometryModel3D.Geometry>
                                <MeshGeometry3D x:Name="geometryModel3D1"  
                                    Positions="-1,1,0 -1,-1,0 1,-1,0 1,1,0
                                                -1,-1,0 -1,-1,-2 1,-1,-2 1,-1,0
                                                 -1,-1,-2 -1,-3,-2 1,-3,-2 1,-1,-2"
                                    TriangleIndices="0 1 2 0 2 3             
                                                     4 5 6 4 6 7
                                                     8 9 10 8 10 11"                                               
                                    TextureCoordinates="0,0 0,1 1,1 1,0">
                                </MeshGeometry3D>
                            </GeometryModel3D.Geometry>
 
                            <GeometryModel3D.Material>
                                <DiffuseMaterial>
                                    <DiffuseMaterial.Brush>
                                        <DrawingBrush TileMode="Tile" Viewport="0 0 1 1" Stretch="Fill">
                                            <DrawingBrush.Drawing>
                                                <DrawingGroup>
                                                    <GeometryDrawing Brush="Green">
                                                        <GeometryDrawing.Geometry>
                                                            <RectangleGeometry Rect="0 0 10 10" />
                                                        </GeometryDrawing.Geometry>
                                                    </GeometryDrawing>
                                                    <GeometryDrawing Brush="Red">
                                                        <GeometryDrawing.Geometry>
                                                            <EllipseGeometry Center="5 5" RadiusX="2.5" RadiusY="2.5" />
                                                        </GeometryDrawing.Geometry>
                                                    </GeometryDrawing>
                                                </DrawingGroup>
                                            </DrawingBrush.Drawing>
                                        </DrawingBrush>
                                    </DiffuseMaterial.Brush>
                                </DiffuseMaterial>
                            </GeometryModel3D.Material>
 
 
                            <GeometryModel3D.BackMaterial>
                                <DiffuseMaterial>
                                    <!--<DiffuseMaterial.Brush>
                                        <SolidColorBrush Color="Red"/>
                                    </DiffuseMaterial.Brush>-->
                                    <DiffuseMaterial.Brush>
                                        <ImageBrush Stretch="Fill" ImageSource="C:\\Documents and Settings\\All Users\\Documents\\My Pictures\\Sample Pictures\\Sunset.jpg" />
                                    </DiffuseMaterial.Brush>
 
                                </DiffuseMaterial>
                            </GeometryModel3D.BackMaterial>
 
                        </GeometryModel3D>
                    </ModelVisual3D.Content>
                </ModelVisual3D>
 
            </Viewport3D>
        </tools:TrackballDecorator>
 
    </Grid>
 
</Window>
                                  
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Select allOpen in new window

  • 1.JPG
    • 21 KB

    DrawingBrush for GeometryModel3D.Material (appears only on the first two triangles). I need it to stretched on the six triangles available.

    DrawingBrush for GeometryModel3D.Material (appears only on the first two triangles). I need it to stretched on the six triangles available.
  • 2.JPG
    • 22 KB

    ImageBrush for GeometryModel3D.BackMaterial (appears only on the first two triangles). I need it to stretched on the six triangles available.

    ImageBrush for GeometryModel3D.BackMaterial (appears only on the first two triangles). I need it to stretched on the six triangles available.

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Asked On
2009-09-10 at 04:39:06ID24720954
Tags

WPF 3D texture mapping

Topics

WPF and Silverlight

,

.NET

,

Microsoft Visual C#.Net

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Answers

 

by: MareiAlgarniPosted on 2009-09-10 at 22:26:12ID: 25306859

I have found the solution myself:

 TextureCoordinates=" 0,0 0,0.333 1,0.333 1,0
0,0.333 0,0.666 1,0.666 1,0.333
0,0.666 0,1 1,1 1,0.666 ">

20120131-EE-VQP-002

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