Hi,

don't know if anyone has experienced this:

I try to put HelixViewport3D in a user control like this

    <Grid HorizontalAlignment="Stretch" VerticalAlignment="Stretch">
        <h:HelixViewport3D ZoomExtentsWhenLoaded="True"
            x:Name="HelixViewport"
            Width="{Binding ActualWidth, ElementName=Container, Mode=OneWay}" 
            Height="{Binding Height, ElementName=Container, Mode=OneWay}">
            <h:SunLight />
        </h:HelixViewport3D>
    </Grid>

and in my Shell.xaml, I have this

<ContentControl cal:RegionManager.RegionName="MainCanvasRegion" Width="auto" Height="auto" />

Next, I use Prism to load the UserControl to the region like this

            _regionManager.RegisterViewWithRegion(Constants.RegionNames.MainCanvasRegion,
                                                  () => _container.Resolve<HelixCanvasView>());

the user control is placed to the ContentControl, but the user control has nothing in it.

I use Snoop to check. In the visual tree, the HelixCanvasView is in the tree, but underneather, it has nothing. Everything is gone. Very strange.

The way I am using Prism is correct. The shell has other regions, and other user controls are loaded properly. It's only this user control with HelixViewport3D. Well, technically, the control is loaded, but the HelixViewport3D is kicked out.

Does anyone know why?


Thanks

ok, I found out the problem of this issue. It's not really related to Helix control.

It feels more like a Microsoft bug.

For testing purpose, I was using a static resource of array for the items source, but as long as it's there, it kicks out the InitializeComponent method. So my user control becomes blank.

It's very strange, because the same way of defining the static resource works fine in Windows-level. The problem is only in the User Control level. and I can't find any reason or solution to it.

Hi,

I am doing quite well with my modelling. Got a little stuck though. Does HELIX allow for the use of transparent PNGs as a texture ?

I'm trying to get my human model's eyelashes to show up but they don't. I know I am locating the image okay because when I try to load a jpg in there it appears where the eyelashes should be.

The original texture for the eyelashes used alpha channel, but I don't think we can do that with HELIX at this time.

So, I used created a PNG of them instead, but then nothing appears at all. Surely something should appear ?

This is how the material looks in the MTL file :

newmtl 6_Eyelash
d 1
Kd 1 1 1
map_Kd Maps/V5BreeLashes1.png

I also made sure that the eyelashes are loaded last, as I was reading that transparent objects need to come last. Not sure if that's appropriate for what I am doing though.

Any thoughts ?

I am so silly. I had two folders as I had to convert the alpha maps to PNG. Of course I forgot to transfer the eyelashes PNG to the working folder. So it was not finding it.

Shoot me now. All working once I had the ordering correct - transparencies need to come last !

Hello,

I have an application with Helix 3D Toolkit.
I am using seamless texture and I need to mapping textures (jpg) on the mesh in repeated mode (wrap mode).

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

for the imgBrush I need to have imgBrush with Wrap mode texture.

In the DirectX is enumerator TextureAddressMode.

http://msdn.microsoft.com/en-us/library/windows/desktop/bb206366(v=vs.85).aspx

How can I do this?

Many thanks
Jindrich

I think you can use the TileMode property of the ImageBrush!
http://msdn.microsoft.com/en-us/library/system.windows.media.tilebrush.tilemode(v=vs.110).aspx

I'm working with the SimpleDemo and getting stuck as I am new to C#.

I see this in the code :

        /// <summary>
        /// Gets or sets the model.
        /// </summary>
        /// <value>The model.</value>
        public Model3D Model { get; set; }

I assume this is going to load and get the current model in the scene ?

So how can I load a model from outside of the MainViewModel.cs ?

Hopefully I can explain where I am. I reduced the size of the HelixViewPort and added a slider and a text box. At this point I am just playing, but lets say I want the slider to trigger models. So when it is to the right it is one model and to the left a different model.

I have some code I came up with for the form :

namespace ExampleBrowser
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    /// 

using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Media3D;

using HelixToolkit.Wpf;

    public partial class MainWindow : Window
    {
        public static int foo;

        public MainWindow()
        {
            InitializeComponent();
            this.DataContext = new MainViewModel();
        }

        public void Slider_ValueChanged(object sender, RoutedPropertyChangedEventArgs<double> e)
        {

            ObjReader CurrentHelixObjReaderb = new ObjReader();
            Model3DGroup MyCube = CurrentHelixObjReaderb.Read("C:/Users/Roger/Desktop/cube/cube-long.obj");

            // And now what ?!


        }

        
    }
}

Here's an image of my form that may help :




I'm just stuck on loading the model into the viewer. I can do it in the MainViewModel.cs quite easily

ObjReader CurrentHelixObjReaderb = new ObjReader();
            Model3DGroup MyEnd = CurrentHelixObjReaderb.Read("C:/Users/Roger/Desktop/cube/cube-long.obj");

            this.Model = MyEnd;

But due to C# being new to me I don't know how to do it elsewhere, like make it global or something.

Many thanks for any help :)

Please delete this thread if you see fit. I realise I was leading myself up a blind alley.

Hi,

First, thanks for your work with helixtoolkit!
I use it to create a 3D application to display model 3D in .stl

Now i want to try your fork HelixToolkit.SharpDX.Wpf_NET40, but it is impossible to run and try the example.

It writes "Error registering effect, unable to load d3dcompiler_43.dll"

Could you help me ?

Thanks

Cédric

I put d3dcompiler_43.dll in c:/windows/system32


and now i have

"Tentative de chargement d’un programme de format incorrect. (Exception de HRESULT : 0x8007000B)"

"Attempt to load a program with an incorrect format. (Exception from HRESULT: 0x8007000B)"

Any help would be fine ?


Cédric

If you have errors with missing DirectX dlls (e.g. d3dcompiler_42.dll is missing) try installing the DirectX 2010 End-Users Runtime from: http://www.microsoft.com/en-us/download/details.aspx?id=8109 That applies also to Windows 8/8.1 even if it comes with a DX SDK.

I am playing with Terrain Example

Currently the Source refers to a file to be uploaded using SurfacePlotVisual3D's

UpdateModel()

I am testing to use Helix3D as usercontrol through ElementHost in WinForm application

I am trying to figure out how to pass a new fileName string from WinForm so that I could define UpdateModel( FileName) and choose new file to load 3D data during run time.

Anyone know any example which I could study?
D.

Sorry, I don't know how to use it from winforms.

Hi,

I began WPF 3D programming and I wanted to implement a Line chart which will be updated over time i.e. a kind of waterfall chart in 3D which displayes e.g. spectrums. I had two approaches for this implementation.
First: every spectrum is created as Visual3D with its own Material and GeometryModel3D
Sec: every spectrum is in one big Visual3D

What is the best approach to achieve the solution or is there any better way to do this? Performance is citical as well because it should be filled with live data.

Thanks

For Visual3D vs. Model3D: have a look at http://blogs.msdn.com/b/danlehen/archive/2005/10/09/478923.aspx
The AudioDemo example in this library shows frequency spectra visualized by scaling boxes in one direction.

Thanks for the information. I will check this out and will decide which solution is the best.

Hello,

I´m just learning with WPF, I want to make simple line by using HelixViewport3D from XYZ coordinations to XYZ, but I can´t figure out which parameters I must use. I tried many combinations but without luck.
Can anyone help me with this ?

Avail yourself of one of any number of online resources found by a Google or Bing search for "WPF 3D Tutorial". Charles Petzold's demos were particularly good.

Drawing a line in WPF is not a simple task, drawing a triangle is much easier. Remember to add light(s) to the scene.
I agree with Rob - Petzold's book (and demos) is a great place to start!

Hi,

I've been using the Helix toolkit for a day now, and I just can't get my head wrapped around it.
I have my own WPF interface, and I can load and display a model into my scene. However, I just can't figure out how to change the materials on the model after loading the model from file.

Does anyone know?

Thanks!

No one has any suggestions on how to do this?

Did you try changing the Material property?
http://msdn.microsoft.com/en-us/library/system.windows.media.media3d.geometrymodel3d.material(v=vs.110).aspx

Also, make sure the model is not frozen.

I didn't realize you could do that in XAML :D

I'll give that a try, thanks!

I think you need to change the material programatically if you load a model into the scene at runtime!

objo wrote:

I think you need to change the material programatically if you load a model into the scene at runtime!

And how exactly would I access that material? I use a Model3D after loading in the mesh, but I really don't see where I can change the material anywhere.. :/

you can try setting the Material property of a GeometryModel3D to an instance of Material , for instance DiffuseMaterial

Working great now; thanks a lot! :)

<PerspectiveCamera LookDirection="{Binding ElementName=boardView, Path=Camera.LookDirection, Mode=TwoWay}"  Position="{Binding ElementName=boardView, Path=Camera.Position, Mode=TwoWay}" UpDirection="{Binding ElementName=boardView, Path=Camera.UpDirection, Mode=TwoWay}"/>