sion005 wrote at 2011-10-26 17:49:

Greetings, I'm using Helix in an application to view 3d models, however, when I import the model, it's all black, with no materials. I tried several models, including the ones used on the Studio example, but the result was the same. Probably I'm doing some newbie mistake, but i would appreciate some tips to solve this.

 Here is the code that I use to load the model:

 // Fields
private TerrainCreator tc;
private Model3D CurrentModel;
private ModelVisual3D render;


public MainWindow()
{
this.InitializeComponent();

this.render = new ModelVisual3D();

this.CurrentModel = ModelImporter.Load("C:\\Users\\Pedro\\Desktop\\Helix\\HelixToolkit-Examples\\StudioDemo\\Models\\Ferarri40.3ds");

this.render.Content = this.CurrentModel;
this.view.Add(render); // this is the HelixView3D

}

objo wrote at 2011-10-26 20:43:

hi Pedro! a simple question first: did you add lights to your scene? Helix toolkit has a couple of light visuals, and also a 'headlight' in the HelixViewport3D control.

sion005 wrote at 2011-10-31 15:49:

Problem solved. I didn't had any lights! Thanks a lot!

vuurvos wrote at 2011-04-21 16:08:

Hi,

I want to bind the HelixView3D to a model (MVVM design pattern). The only fully working way I found was by not using the MVVM design pattern. Since the MVVM pattern is a must and used in other all parts of the project, I want to use it also for the HelixView3D.

When I bind to the ModelVisual3D.content to its content in the model, the Viewport3DHelper doesnt work anymore. The viewport3DHelper doesn't detected a Visual3D which is near the clicked point. When I check the VisualChildernCount, its shows me one child.

I think the VisualChild isn't the child (3D Model) which I am clicking on. I guess its an ambientlight visual....

Regards

VuurVOS

zeux wrote at 2011-04-25 20:54:

try adding this to HelixView3D:

protected override void OnItemsChanged(System.Collections.Specialized.NotifyCollectionChangedEventArgs e)

        {
            //base.OnItemsChanged(e);
           switch (e.Action)
            {
                case System.Collections.Specialized.NotifyCollectionChangedAction.Add:
                    Add(e.NewItems.ToList<Visual3D>());
                    break;
                case System.Collections.Specialized.NotifyCollectionChangedAction.Move:
                    break;
                case System.Collections.Specialized.NotifyCollectionChangedAction.Remove:
                    Remove(e.OldItems.ToList<Visual3D>());
                    break;
                case System.Collections.Specialized.NotifyCollectionChangedAction.Replace:
                    break;
                case System.Collections.Specialized.NotifyCollectionChangedAction.Reset:
                    ClearChildren();
                    break;
                default:
                    break;
            }
        }

objo wrote at 2011-06-19 12:27:

vuurvos: I added a MvvmDemo that binds to HelixVis3D.ItemsSource. Adding new Visual3Ds should work now. (In the past I have used to add Visual3Ds in the XAML and bind to Model3Ds in the ViewModels)

zeux: thanks for pointing out the missing code! I added it to HelixView3D with some modifications (seems like you have added different Add/Remove methods) The implementation of Move and Replace is also remaining, as you point out.  

The MvvmDemo is not complete, will add more when I learn more Caliburn.Micro...

tacheleu wrote at 2012-12-07 20:42:

I am using the helixtoolkit of codeplex.

¿How I can set the orientation of the image that I assign to a sphere3D?

I can assign the ImageMaterial but ¿how to rotate/orientate the image?

Thanks in advace

objo wrote at 2012-12-07 21:25:

To rotate the image, try applying a Transform2D to the TextureCoordinates in your sphere geometry.

Or create a material from a VisualBrush or ImageBrush that contains a rotated image (slower performance).

http://msdn.microsoft.com/en-us/library/system.windows.media.transform(v=vs.95).aspx
http://msdn.microsoft.com/en-us/library/system.windows.media.media3d.meshgeometry3d.texturecoordinates.aspx

bennasi wrote at 2012-12-03 11:45:

Hi,

How can I make this:

If I press F1 I would like the same thing to happen (switch view) as it would do when clicking on the bottom of the view cube.

Thanks

objo wrote at 2012-12-03 21:26:

I think it should be possible to add a KeyBinding to the CameraController.BottomViewCommand!

But why F1? That's for help!

bennasi wrote at 2012-12-04 11:05:

Want to use the keybindings as they are in another software package (ANSA).
so I want to change the function keys to default camera positions. 

I cannot find the helixviewport.cameracontroller.bottomviewcommand.
Could you give me some sample code please. 

cobra18t wrote at 2011-11-28 17:53:

How can I use the Helix 3D toolkit with Visual C# Express 2010? The suggested SVN method requires an internet connection, which I cannot get on my development machine and NuGet does not work on Visual C# Express 2010. Does anyone know a way around this?

-Thomas

objo wrote at 2011-11-28 19:07:

hi Thomas, you have a "Download" link under the source code page. This will give you everything in a zip. Good luck!

mihaipruna wrote at 2014-08-17 17:53:

mihaipruna wrote at 2014-08-19 17:26:

private void hv_PreviewMouseWheel(object sender, MouseWheelEventArgs e)
        {
           
            if (hv.Camera.LookDirection.Length >= 800 && e.Delta < 0)
            {
                Vector3D vava = hv.Camera.LookDirection;
                vava = Vector3D.Multiply(800 / vava.Length, vava);
                hv.Camera.LookDirection = vava;
            }

            if (hv.Camera.LookDirection.Length <= 1 && e.Delta > 0)
            {
                Vector3D vava = hv.Camera.LookDirection;
                vava.Normalize();
                hv.Camera.LookDirection = vava;
            }
        }

musicxpg wrote at 2013-02-26 05:40:

musicxpg wrote at 2013-02-26 06:14:

AnotherBor wrote at 2013-11-20 07:26:

objo wrote at 2013-12-02 20:08:

AnotherBor wrote at 2014-01-03 14:48:

Provagino wrote at 2012-01-09 16:41:

How I do create a cylindrical panorama? ( Image source http://blog.360cities.net/)
Thanks

objo wrote at 2012-01-09 19:32:

A simple cylinder with the panorama as a texture should work! For spherical panoramas, use a sphere.

Remember to place the camera in the middle of the cylinder/sphere! And use an emissive material or ambient light!

mentalarray wrote at 2012-04-08 04:32:

Hi

there seemed to be an error in the triangleIndices code for AddTriangles as i had points in all wrong places i have added code that fixes it below

//Not working (old code)

 /*
            int indexEnd = this.positions.Count;
            for (int i = index0; i + 2 < indexEnd; i++)
            {
                this.triangleIndices.Add(i);
                this.triangleIndices.Add(i + 1);
                this.triangleIndices.Add(i + 2);
            }
             */

//Working

           for (int i = 0; i < this.positions.Count; i+=3)
            {
                this.triangleIndices.Add(i);
                this.triangleIndices.Add(i + 1);
                this.triangleIndices.Add(i + 2);
            }

objo wrote at 2012-04-08 13:10:

thanks! I submitted a fix on the AddTriangles method. Notice that the triangle indices should be based on the index of the first point added (this will allow AddTriangles to be called multiple times). I also corrected some errors in the argument checks.

I found that this method is currently not in use in the library, but I will leave it there in case someone use it. Will add more unit tests/examples for the mesh builder later.

Mentalarray wrote at 2012-04-08 13:24:

Oh great objo yea i realised about the index afterwards as i was adding my object all in one go good point 

great work on the whole library btw,,,