[Marc]

Hi!

I am trying to modify the MultiThreadingSample.xaml.cs to draw other custom geometries. To minimize code changes I just change this:

Code:

       public static SceneNode CreateBoxSceneNodes(MeshGeometry3D mesh, Point3D center, Size3D size, float modelScaleFactor, bool useSingleColor, int xCount, int yCount, int zCount)
       {
           var rootSceneNode = new SceneNode();

           var dxMeshGeometry3D = new GeometryMesh(
               new List<Vector3>() { new Vector3(1,1,0),
                   new Vector3(1,-1,0),
                   new Vector3(-1,1,0),
                   new Vector3(-1,-1,0),
                   new Vector3(0,0,1),
               },
               new List<Vector3>() { },
               new List<Vector2>(),
               new List<int>() { 0, 1, 3, 1, 2, 3, 0, 4, 3, 2, 3, 4, 2, 4, 1, 1, 0, 4 });

That is to draw a Pyramid with square base. I also tried something even simpler, just a flat triangle:

Code:

var dxMeshGeometry3D = new GeometryMesh(
                new List<Vector3>() {
                    new Vector3(0,1,0),
                    new Vector3(1,0,0),
                    new Vector3(1,1,0)
                },
                new List<Vector3>() {
                    new Vector3(0,0,1),
                    new Vector3(0,0,1),
                    new Vector3(0,0,1)},
                new List<Vector2>(),
                new List<int>() { 0, 1, 2 });

But it does just not render any figure. The reason I am trying to do this is because I need to render advanced cad models (that assimp cannot load, so I load them aside and get the list of points and triangle indices). Also the normals are not usually available (I can compute them myself, but is there a method to do it, or do I always need to create the geometry mesh with the normals per point?).

Moreover, I do not need to apply any texture onto the models (just solid colors) can I leave the texture indices list empty?

Just add that I do not want to use the WPF models since I need to render all in the DXEngine (so avoiding the conversion from wpf 3d models to DXEngine objects).

Thanks for the support.