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MeshGeometry3D.TriangleIndices Property

.NET Framework 4

Gets or sets a collection of triangle indices for the MeshGeometry3D.

Namespace: System.Windows.Media.Media3D
Assembly: PresentationCore (in PresentationCore.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

Syntax

C++

public Int32Collection TriangleIndices { get; set; }

XAML Property Element Usage

<object>
  <object.TriangleIndices>
    <Int32Collection .../>
  </object.TriangleIndices>
</object>

XAML Attribute Usage

<object TriangleIndices="Int32Collection" .../>

Property Value

Type: System.Windows.Media.Int32Collection
Collection that contains the triangle indices of the MeshGeometry3D.

Dependency Property Information

Identifier field	TriangleIndicesProperty
Metadata properties set to true	None

Remarks

For a triangle in a given 3-D mesh, the order in which the triangle's vertex positions are specified determines whether the triangle face is a front or back face.

The Windows Presentation Foundation 3-D implementation uses a counter-clockwise winding order; that is, the points that determine a front-facing mesh triangle's positions should be specified in counterclockwise order, as viewed from the front of the mesh.

Setting the TriangleIndices property is optional. If the indices are not specified, triangles are drawn in a non-indexed fashion. Every set of three positions becomes a triangle.

Examples

XAML


<GeometryModel3D>
  <GeometryModel3D.Geometry>
          <MeshGeometry3D 
              Positions="-1 -1 0  1 -1 0  -1 1 0  1 1 0"
              Normals="0 0 1  0 0 1  0 0 1  0 0 1"
              TextureCoordinates="0 1  1 1  0 0  1 0   "
              TriangleIndices="0 1 2  1 3 2" />
      </GeometryModel3D.Geometry>
      <GeometryModel3D.Material>
          <DiffuseMaterial>
              <DiffuseMaterial.Brush>
                  <SolidColorBrush Color="Cyan" Opacity="0.3"/>
              </DiffuseMaterial.Brush>
          </DiffuseMaterial>
      </GeometryModel3D.Material>
  <!-- Translate the plane. -->
      <GeometryModel3D.Transform>
          <TranslateTransform3D
            OffsetX="2" OffsetY="0" OffsetZ="-1"   >
          </TranslateTransform3D>
      </GeometryModel3D.Transform>
  </GeometryModel3D>

Version Information

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Platforms

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

Reference

MeshGeometry3D Class

System.Windows.Media.Media3D Namespace

Other Resources

3-D Graphics Overview

3-D Solids Sample

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