Hi,
I don't know how to change the opacity of an FileModelVisual3D object.
Somebody can help me...

Try to traverse the visual tree below the FileModelVisual3D and replace the materials in the GeometryModel3D objects.

thanks for your answer but I don't know how 'to traverse the visual tree'...
I can access to children of viewport but after... I don't know...

Hi,
Anybody knows how to retrieve geometryModel3D from FileModelVisual3D ?

I've never worked with FileModelVisual3D but I'm sure that the way is to try to cast its Content as GeometryModel3D and Model3DGroup:

   Model3DGroup grupo = (Model3DGroup)myFileModelVisual3D.Content;

            foreach (var modelo in grupo.Children.OfType<GeometryModel3D>())
            {
                GeometryModel3D model = (GeometryModel3D)modelo;
                var mat1 = modelo.Material.Clone();
                var mat2 = modelo.BackMaterial.Clone();
                MaterialHelper.ChangeOpacity(mat1, SliderVerifyOpacity.Value);
                MaterialHelper.ChangeOpacity(mat2, SliderVerifyOpacity.Value);

                model.Material = mat1;
                model.BackMaterial = mat2;
            }

            foreach (var group in grupo.Children.OfType<Model3DGroup>())
            {
                Model3DGroup grupoModel = (Model3DGroup)group;
                foreach (var modelo in grupoModel.Children.OfType<GeometryModel3D>())
                {
                    GeometryModel3D model = (GeometryModel3D)modelo;

                    var mat1 = modelo.Material.Clone();
                    var mat2 = modelo.BackMaterial.Clone();
                    MaterialHelper.ChangeOpacity(mat1, SliderVerifyOpacity.Value);
                    MaterialHelper.ChangeOpacity(mat2, SliderVerifyOpacity.Value);

                    model.Material = mat1;
                    model.BackMaterial = mat2;
                }
            }

In this example the opacity is controlled by a Slider, change to a specific value if you want it so.
Good luck.

How can I make 2D polygon geometry with image texture.

For the rectangle I use two triangle and for texture I added coordinates for triangles:

// triangle ABC
mesh.TriangleIndices.Add(0);
mesh.TriangleIndices.Add(1);
mesh.TriangleIndices.Add(2);

// triangle ACD
mesh.TriangleIndices.Add(0);
mesh.TriangleIndices.Add(2);
mesh.TriangleIndices.Add(3);

mesh.TextureCoordinates.Add(new Point(0, 1)); // point A
mesh.TextureCoordinates.Add(new Point(1, 1)); // point B
mesh.TextureCoordinates.Add(new Point(1, 0)); // point C
mesh.TextureCoordinates.Add(new Point(0, 0)); // point D


var d = new DiffuseMaterial(imgBrush);
mGeometries.Add(new GeometryModel3D(mesh, d));

....


On this discussion I found functions for create of polygon.
public static MeshGeometry3D FillPolygon(Polygon p)

    {
        List<Point3D> pts3D = new List<Point3D>();
        foreach (var point in p.Points)
        {
            pts3D.Add(new Point3D(point.X, point.Y, 0));
        }
        Polygon3D p3 = new Polygon3D(pts3D);
        return FillPolygon(p3);
    }

    public static MeshGeometry3D FillPolygon(Polygon3D p3)
    {
        var meshBuilder = new MeshBuilder(false, false);

        Polygon polygon = p3.Flatten();
        var triangleIndexes = CuttingEarsTriangulator.Triangulate(polygon.Points);

        meshBuilder.Append(p3.Points, triangleIndexes);

        return meshBuilder.ToMesh();
    }

Polygon drawing right, but I do not know how I do configuration for fill texture on the polygon.
Texture is rectangle image and I wants show shape cut of texture on the polygon.

Thank you very much.
Jindrich

Hi,

I've just started looking at Helix3D. It looks pretty awesome.

I was just wondering if anyone knew if it was possible or how difficult it would be to add a dynamic texture to something like the Earth demo, so as you zoomed in, you give the zoomed in region higher resolution textures? there are already a map tiling library (brutile) that can handle the fetching of the correct tiles from a mapserver, so it would just be a matter of replacing the texture with the correct resolution one in the correct place right?

Thanks,

Rob

Yes, this would be a nice demo! I think you also need some level-of-detail (LOD) algorithm here - if you zoom in and tilt you will expose a large number of tiles! Does anyone know an easy way to solve this?

How would the dynamic texture work though? I don't know much about this kind of thing. I know how it works in a 2d environment, but am out of my depth with 3d at the moment.

MapSUI is a great example of map streaming using brutile, so i guess it would be a similar thing to this. I would be willing to lend a hand with the mapping side of things if someone can help with the 3d side of things!

If we can get this working i can see it looking like google earth, which would be awesome.

Thanks

I have perspective camera in helix 3d view and i assigned solidcolorbrush with materialhelper behind my object which is a modelvisaul3D. I assigned a drawing brush with transparent background but I have problem with transparency.When i want to draw modelvisual3D with transparent background on the modelvisual3D with solidcolorbrush, but My problem is about Order of drawing this in helixviewer! Is there any problem with wpf or helix with this?

I think this link can tell my problem better =>
http://m.blog.csdn.net/blog/wmjcom/4038384

Hi there,

got following Problems at runtime, usoing the sharpdx Alpha package from nuget.

StackTrace:
       bei HelixToolkit.Wpf.SharpDX.Viewport3DX.HelixToolkit.Wpf.SharpDX.IRenderer.Render(RenderContext context) in c:\TeamCity\buildAgent\work\4ff441572eb3435d\Source\HelixToolkit.Wpf.SharpDX\Controls\Viewport3DX.cs:Zeile 890.

and s on...

any suggestions? what is TeamCity and do I Need it to run the sharpdx Alpha?

thanks for help

Ok. Got it:

The problem was, that I didn't set the sharpdx_direct3d11_effects_x64.dll to be copied to the debug/release output folder (properties of the DLL).

Missed controls are just a side effect.

Good day,

I have two projects in a WPF solution, P1 is the main .exe assembly including the Helix3DViewport and an object that extends a base class in P2. The base class in P2 sets up an interface and contains a function that among other things sets a text overlay via Overlay.SetPosition3D and updates it on interaction. If this base class is situated in P1, the overlay works perfectly, but if the base class is moved to the other project, the overlay simply applies the text to the bottom left corner of the overlay canvas. Could there be a workaround for this, as I really need the base class to be in a class library rather than in P1?

Thank you in advance,
Jason

This was difficult, can you create a small example that we can use to debug?

Terribly sorry I forgot, I found that I added the overlay static class manually (copied and pasted the code as it was not in the library for some reason). Adding this class to both projects solved the issue. I find it weird that I received no error though.