title: Draw a 3d rectangular box(rectangular prism ?) in wpf
body: <p>I am using the following code to form a cube. It uses triangles for each face. How can I make a rectangular box by modifying its values. I dont have much idea on the indices property used here.</p>
  
  <pre><code> &lt;GeometryModel3D.Geometry&gt;
   &lt;MeshGeometry3D
   Positions = "-1,-1,1 1,-1,1 1,1,1 -1,1,1"
   TriangleIndices = "0 1 2     2,3,0"
   TextureCoordinates="0,1 1,1 1,0 0,0"
   /&gt;
   &lt;/GeometryModel3D.Geometry&gt;
  </code></pre>