I should be able to move and rotate the camera with the keyboard at least even while doing drag-drop operations, is there a way to retain that functionality?

Hello,

i am new to c# and WPF, and i am trying to use helix toolkit to represent a kinect depth image as a point cloud. i am trying to load Points3DCollection into PointsVisual3D as it is explained in the source for the pointsandlines example. It keeps returning the message that it cannot implicitly convert points3DCollection to pointsvisual3D. Is there an example just for creating point clouds or just points using the mentioned methods?

Thx

Hi,

I am also trying to create a point cloud for the human body using Kinect and Helix 3d. For now there is a sample in the examples directory which I think has some mistakes in converting depth to 3d mesh cordinates. I found this link useful :

Kinect Stackoverflow

using (DepthImageFrame depthFrame = e.OpenDepthImageFrame()) {
  DepthImagePixel[] depth = new DepthImagePixel[depthFrame.PixelDataLength];
  SkeletonPoint[] realPoints = new SkeletonPoint[depth.Length];

  depthFrame.CopyDepthImagePixelDataTo(depth);

  CoordinateMapper mapper = new CoordinateMapper(sensor);
  mapper.MapDepthFrameToSkeletonFrame(DEPTH_FORMAT, depth, realPoints);
}

If someone can help me with converting this cordinates into correct Point3d Cordinates :)

Luka1121, PointsVisual3D has a Points property to which you should assign your collection of points.

Abuseukk, you should probably decide to use the depth data as one of the coords of the points. new Point3D(xcoord, ycoord, depth[i]) would spread the points in Z axis accordingly to their depth.

this is my code.. i have to add HVP3D dynamically..

string[] AllFiles = Directory.GetFiles(@"C:\Users\..", "*.3ds");
            HelixViewport3D[] hel_ar = new HelixViewport3D[AllFiles.Count()];
            
            for (int i = 0; i < AllFiles.Count(); i++)
            {
                hel_ar[i] = new HelixViewport3D();

                PerspectiveCamera myPCamera = new PerspectiveCamera();
                myPCamera.Position = new Point3D(10000, 0, 0);
                myPCamera.LookDirection = new Vector3D(-1, 0, 0);
                myPCamera.FieldOfView = 60;
                hel_ar[i].Viewport.Camera = myPCamera;
               
                DirectionalLight myDirectionalLight = new DirectionalLight();
                myDirectionalLight.Color = Colors.White;
                myDirectionalLight.Direction = new Vector3D(-0.61, -0.5, -0.61);
                hel_ar[i].Viewport.Height = 115;
                hel_ar[i].Viewport.Width = 115;
                
                Model3DGroup m3d = new Model3DGroup();
                m3d = ModelImporter.Load(AllFiles[i]);
                m3d.Children.Add(myDirectionalLight);
                ModelVisual3D m = new ModelVisual3D();
                m.Content = m3d;
                hel_ar[i].Viewport.Children.Add(m);
               
                
               stackPanel1.Children.Add(hel_ar[i]);
                                
            }

I am trying to build a working example program to render Kinect data using the Helix SharpDX API and I need the correct steps for continually rendering a changing model. I have the old Kinect example from the WPF API working and I can generate a 3D model from the Kinect however all of the SharpDX examples use static models that are created in the MainViewModel constructors prior to rendering. Could someone provide the most efficient steps to continually rendering a changing model using the Helix SharpDX API?

Greetings,

Thanks for your great toolkit.

Please explain a little bit when does CameraController get initialized? It seems to be null on Viewport3D creation and I need to set some properties to it when programmatically creating Viewport3d.

Best regards,
Mikhail

For HelixViewport3D the CameraController is defined in the control template. You can get the reference after the OnApplyTemplate method has been called.
Can the DefaultCamera property help in your case?

The HelixViewport3D control has "Camera" and "DefaultCamera" properties.

See examples in
Source\Examples\ExampleBrowser\Examples\SurfacePlot\MainWindow.xaml
and
Source\Examples\ExampleBrowser\Examples\CameraControl\MainWindow.xaml

The DefaultCamera property sets the camera properties used when resetting the view.

Hi,when i am using your toolkit.A strange thing occurred. i put two RectangleVisual3D of different color (one of them is RED ,the other is BLUE) closely, one RectangleVisual3d looked like dissolve into another RectangleVisual3d just like the picture below:

the code:

 <t:RectangleVisual3D Length="100" Width="100" Origin="0,0,1" Fill="#FFF50404" >
            </t:RectangleVisual3D>
            <t:RectangleVisual3D Length="100" Width="100" Origin="0,0,1.0001" Fill="#FF0611FB">
            </t:RectangleVisual3D>

another picture:

Did you set NearPlaneDistance in Camera? Had the same problem when NearPlaneDistance was 0.

Thank you for your help,but it can't solve the problem.The code:

 this.Position = camera.Position;
            this.LookDirection = camera.LookDirection;
            this.UpDirection = camera.UpDirection;
            //this.NearPlaneDistance = camera.NearPlaneDistance;
            this.NearPlaneDistance = 0;
            this.FarPlaneDistance = camera.FarPlaneDistance;

Set value different from 0. Chosen value is depends on situation - if scene is large value can be 10 or more, if it is a small scene then value can be 0.1. I set 15 to NearPlaneDistance and it resolved problem on 1500x1500 units scene. Parts of the scene closer to camera than value in NearPlaneDistance property won't be displayed. As far as i know this problem is connected with floating point rounding when renderer is trying to determine which object is closer to camera.

<PerspectiveCamera Position="0, 600, 525" LookDirection="0, -600, -525" UpDirection="0,1,0" NearPlaneDistance="15"/>