Hi,

I hadn't updated my Helix for while, so I started fresh with TortoiseHg - I followed the instructions here :

https://helixtoolkit.codeplex.com/wikipage?title=Obtain%20and%20build%20the%20code&referringTitle=Documentation

But when I try to open HelixToolkit.Wpf.sln it throws this error :

Unsupported
This version of Visual Studio is unable to open the following projects. The project types may not be installed or this version of Visual Studio may not support them.
For more information on enabling these project types or otherwise migrating your assets, please see the details in the "Migration Report" displayed after clicking OK
HelixToolkit, "C:\Users\Roger\Documents\Visual Studio 2013\Projects\HELIX\Source\HelixToolkit\HelixToolkit.csproj"

In the following migration report I get this :

HelixToolkit\HelixToolkit.csproj: The application which this project type is based on was not found. Please try this link for further information: http://go.microsoft.com/fwlink/?LinkID=299083&projecttype=786C830F-07A1-408B-BD7F-6EE04809D6DB

The rest of the files appear to be migrated okay as they all have ticks.

Now I cannot work on my project sadly. Could someone please help ?

Many thanks,

Rog.

P.S. I am using Visual Studio 2013 Express.

Any thoughts ?

The HelixToolkit.csproj project is a portable class library.
I think you have two options:

1. You can change this to a class library to compile with VS Express.
2. You can also remove the project and references in the solution, the project is not yet in use. This option will not work when code is added to that project

Have nice time of a day.
At first, I want to say "thank you", Your project is something awesome.
I didn't dive deep into Your code yet, but i have a question. As I can see, TubeVisual3D is an element for making curve tubes with variable diameters throug path - so, what i'm doing wrong?:

TubeVisual3D t = new TubeVisual3D();
            t.Fill = System.Windows.Media.Brushes.Black;
            
            Point3DCollection p3dc = new Point3DCollection();
            List<double> diamlist = new List<double>();
            double dx = 15;
            double dy = 15;
            double dz = 15;
            double dd = 10;
            int n = 30;
            for (int i = 1; i < n; i++)
            {
                p3dc.Add(new Point3D(0 + Math.Pow((double)i / n, 3) * dx, 0 + ((double)i / n) * dy, 0 + ((double)i / n) * dz));
                diamlist.Add(3.5 + ((double)i / n) * dd);
            }
            t.Path = p3dc;
            t.Diameters = diamlist;            
            _HelixViewport3D.Children.Add(t);

and i'm got curve pipe with constant diameter of 1.

Best regards.

p.s. sorry for my bad english, it isn't my native language)

try changing the order of setting Diameters and Path

t.Diameters = diamlist;
t.Path = p3dc;

If you set the diameters last, the mesh will be generated twice.
I will correct the bug.

Wow! Great. TY.

Is there a way to dispose of these ?

My problem is this....I have two windows. One does operations on files and the second window shows the model in the viewport.

Even when I close the second window with the viewport, the system still has a connection with the files previously used by the viewport.

So when I return to window one I get an error that my files are already being used (by window two).

I thought using Close() on window two would clear things, but it does not.

Hi!. Congratulations for this great library. I am using Helix + Petzold ModelVisual3D drag and drop within a 3D scene. I wonder if it would be possible with Helix similiar effect to which the application is made in Rhinoceros. How they get that dragging a ModelVisual3D with the mouse remains static back home in his position?

You should create a copy of the visual while performing the manipulation. I think you can add the copy to your scene when the manipulators mouse down event is raised and remove it on mouse up.
I think this should be handled by the application, not by the Manipulator classes.

Sorry to do two threads back to back, but I've run into another problem.
As the title said, using a diameter list for a TubeVisual3D instead of one set diameter seems to half the diameter at every point.

I've edited streamlines to see if the problem is here, and it doesn't seem so, setting the tube diameters to one, and the cone radius to .5 produced similar diameters, so I would guess the MeshBuilder tubes are fine, but this:

 private void DiamListTube_Click(object sender, RoutedEventArgs e)
        {
            TubeVisual3D diamListTube = new TubeVisual3D();

            Point3DCollection tubePath = new Point3DCollection();
            tubePath.Add(new Point3D(0,  0, 5));
            tubePath.Add(new Point3D(32, 0, 5));

            IList<double> diameterList = new List<double>();
            diameterList.Add(10.0);
            diameterList.Add(10.0);

            diamListTube.Diameters = diameterList;
            diamListTube.Path = tubePath;
            diamListTube.Fill = Brushes.Red;
            MainViewPort.Children.Add(diamListTube);
        }

        private void NoDiamList_Click(object sender, RoutedEventArgs e)
        {
            TubeVisual3D tube = new TubeVisual3D();    

            Point3DCollection tubePath = new Point3DCollection();
            tubePath.Add(new Point3D(0, 10, 5));
            tubePath.Add(new Point3D(32, 10, 5));

            tube.Diameter = 10.0;
            tube.Path = tubePath; 
            tube.Fill = Brushes.Blue;
            MainViewPort.Children.Add(tube);

        }

Produces this:


Am I doing something wrong, or is the Diameter list the issue?

thanks, this is a bug in the library! I added issue https://helixtoolkit.codeplex.com/workitem/9988

I have corrected the bug in the TubeVisual3D class.
I also changed the type of the Diameters property, so we can test by the following xaml:

how I can extrude a polyline?
Anyone have an example?

Please, i need the same help. I tried AddExtrudedGeometry but didnt understand well the use of it. A simple sample of extruded polygon geometry could be very helpful. Thanks!!

See here I hope it helps.

thank you rinaldin, exactly what I need.
Please i need an example in C # or VB, with a curve would be great

        ' the Path is a Point3DCollection and the Section is a PointCollection
        Dim sect As New PointCollection
        ' rettangolare
        sect.Add(New Point(-1, -1))
        sect.Add(New Point(0, -1))
        sect.Add(New Point(1, 1))
        sect.Add(New Point(-1, 1))
        Dim asse As New Vector3D(1, 0, 0)

        Dim rend As New ExtrudedVisual3D
        rend.Section = sect
        rend.Path.Add(pt)
        rend.Path.Add(pt1)
        rend.SectionXAxis = asse
        rend.Fill = Brushes.Green
        rend.IsPathClosed = True
        rend.IsSectionClosed = True
        HelixViewport3D1.Children.Add(rend)

        container.Children.Add(rend)

Thanks you,
is great, I have a problem with rend.SectionXAxis = asse, you can help me?.

"asse" is a vector orthogonal to the extrusion axis. You have to orient it to the desired direction , but always othogonal to the vector connecting pt and pt1 (starting and ending points of the extrusion).

Is posibel added caps to the extrusion?

I didn't try yet, but I think so; add a Polygon using the sect points.

Hello,

The documentation on the following page seems to be missing:
http://helixtoolkit.codeplex.com/wikipage?title=Create a 3D view&referringTitle=Documentation

I found the link on this page:
http://helixtoolkit.codeplex.com/documentation

Can you look into fixing this page?

Thank you.

Yes, we should put some effort into the documentation.
Currently, the best way to learn this library is to look at the code for the examples.
Start with Source\Examples\SimpleDemo

I want to position loaded models (.obj) on the surface of a sphere (like the Earth demo for example) but I want them to stay "up", point towards the normal direction. Problem is I can't seem to find a way to set the normal of a loaded model. From what I gather, the normal can be computed as:

Vector3D normal = (placementPosition - centerOfSphere).Normalize

So lets say I have a Point3D for the position of the object. I then translate transform the objects position to put it at this point which works. Next is to rotate it somehow to that it is pointing "up". This is the part I'm missing. Please be gentle, just learning 3D programming.

Thanks!

You need to specify one more vector that defines the orientation of the model.
Then use the Vector3D.CrossProduct to find a vector that is perpendicular to the two others. Normalize the vectors and now you have an orthonormal basis.
Define a Matrix3D where m11-m33 are the components of the three vectors (defined in rows or columns, I never remember...) and finally create a MatrixTransform3D.

This would be a nice example to add to the example browser - e.g. a sphere with the earth texture and the eiffel tower model - they are already in there!