jmontoya wrote at 2012-03-23 13:45:

I am using Helix to display a point cloud from kinect it is working very well. I have 2 questions. First can I chnage the color for each point? do you have any registration tools? I want to combine multiple clouds to create a 3D solid. Thanks in advance.

objo wrote at 2012-04-03 01:34:

I have been thinking about creating a similar demo, showing the depth image as a mesh and using the rgb image for the texture map...

Are you using the PointsVisual3D to display the point cloud? This only supports a single color, but can be extended to support a material containing a 'palette' of colors (then you can set different colors for each point by texture coordinates). Setting different material to each point will be too slow.

jmontoya wrote at 2012-04-03 02:26:

Yes I am using PointsVisual3D to display the point cloud and it is working well. I am very interested in the approach you are suggesting but I don't know where to start. I am kind of new to 3D but I am trying to learn from your very good samples. If you decide to create your sample I will be checking and if you think there is something I can help with please let me know.

If I display a single cloud, it works well but when I try to display all the frames coming from kinect it just takes over the CPU.

objo wrote at 2012-04-03 21:54:

I think you could create a subclass of PointsVisual3D to get what you need.

Set the Model.Material = new DiffuseMaterial(new ImageBrush(image)) where image is coming from the kinect.

Then override the UpdateGeometry method and set the Mesh.TextureCoordinates for all points in your cloud (remember to copy 6 times (number of vertices in 2 triangles) for each point).

Are you adding 640x480 = 307200 points to the PointsVisual3D? That will for sure be very cpu intensive!

objo wrote at 2012-04-08 13:22:

I added a small kinect example (Examples/Kinect/DepthSensorDemo). All code is in the MainWindow code-behind (should be easy to refactor to a view-model). The demo reads the depth and color data and creates an image material and a triangular mesh (triangles containing too far/too near points are not included, as well as triangles where the depth range exceeds a given limit). The transform from depth data to 3D points can be improved, it would be interesting to get the correct scale (e.g. in meter or millimeter). Do you have a better solution on how to transform the depth data to 3D?

I let the CompositionTarget.Rendering event control how often the depth and color data is updated, I am getting ok refresh rates even on the 640x480 depth mode.

pyrrhicpk wrote at 2012-11-06 04:52:

jmontoya wrote:

Yes I am using PointsVisual3D to display the point cloud and it is working well. I am very interested in the approach you are suggesting but I don't know where to start. I am kind of new to 3D but I am trying to learn from your very good samples. If you decide to create your sample I will be checking and if you think there is something I can help with please let me know.

If I display a single cloud, it works well but when I try to display all the frames coming from kinect it just takes over the CPU.

 

Hi,

Can you drop in some sample code how to display the point cloud using PointsVisual3D please? I am trying to display it using MeshBuilder.AddSphere however, it freezes the UI. I have the points in x,y,z and I just want to display them in helixviewport3d. How can I do it using PointsVisual3D? Please advise me.

Thanks

AnotherBor wrote at 2014-01-08 11:56:

objo wrote at 2014-01-08 12:18:

AnotherBor wrote at 2014-01-08 12:31:

objo wrote at 2014-01-09 11:43:

AnotherBor wrote at 2014-01-10 02:33:

JohnSourcer wrote at 2012-12-11 20:28:

Hi Objo,

After many hours of working with your toolkit, I managed to get it working on Pixelsense device SDK 2.

I have it in a ScatterViewItem and am able to rotate and zoom the 3D object (a globe in my case). I do however wonder if I have the code right (it seems to smell a little) and would appreciate any thoughts:

//Grabbed the touch event on the Helix3DViewport

private void HV3DTouchDown(object sender, TouchEventArgs e)
        {
            HelixViewport3D view = sender as HelixViewport3D;
            CameraController cameraController = view.CameraController;
            cameraController.TouchMode = TouchMode.Rotating;
            Manipulation.AddManipulator(cameraController, e.TouchDevice.AsManipulator());
            e.Handled = true;
            CaptureTouch(e.TouchDevice);
        }

JohnSourcer wrote at 2012-12-12 10:32:

Never relinqushes the touch though.

objo wrote at 2012-12-13 23:26:

Cool to hear you got it to work! Sorry I have now experience with the Pixelsense SDK. Do you need to add the manipulator to the camera controller on every touch down event?

JohnSourcer wrote at 2012-12-14 06:30:

Nah sorted that out.

When I zoom however, the Axis of the sphere changes but the camera still focuses on the old axis. So if you spin the globe now it goes all over the show. How do you reset the camera controller to view at the globe at the new zoom?

michaeldjackson wrote at 2012-10-24 21:21:

My manager asked that I provide an elbow fitting to go along with PipeVisual3D. Elbow should join two pipes at any angle and any change in diameter, ie: reducing elbow. I don't have enough experience or knowledge of WPF 3D to do it in the time frame alloted.

We are willing to fund the development, if reasonable. Fairly short timeframe.

Other simple fittings to follow, such as reducers.

Michael

objo wrote at 2012-10-26 08:51:

I don't know about a .NET implementation, but the GLE Tubing and Extrusion library creates nice 'elbows' on its tubes. There is also a java library mentioned on that page, but its link seems to be broken.

Rogad wrote at 2013-12-04 15:54:

Rogad wrote at 2013-12-04 15:56:

objo wrote at 2013-12-04 19:39:

Rogad wrote at 2013-12-04 20:26:

rocheey wrote at 2012-07-12 21:02:

downloaded the newest ver [HelixToolkit-2012.3.77.1.zip], and while there are samples, they are all compiled .exe's

Downloaded the examples file [HelixToolkit-examples.zip] and it is the same ... not one bit of source, only compiled exes...

Is there some place I can go to see some of the toolkit in action ?

rocheey wrote at 2012-07-12 23:09:

ooops... nevermind ... found it  :)

objo wrote at 2012-08-09 01:07:

I added a note in bold in the download's "Release notes" now.

I recommend cloning the source with Hg from https://hg.codeplex.com/helixtoolkit

You can also download the latest source from the "Source code" tab.

CMC wrote at 2013-02-20 00:22:

objo wrote at 2013-02-20 11:34:

CMC wrote at 2013-02-21 02:37:

mfoste wrote at 2013-07-03 21:52:

            targetModel = new SphereVisual3D();

            targetModel.Center = new Point3D(0,0,0);
            targetModel.Radius = 3;
            targetModel.Material = FindResource("TargetMaterial") as Material;

                ColorAnimation myColorAnimation = new ColorAnimation();
                myColorAnimation.To = Colors.Red;
                myColorAnimation.BeginTime = TimeSpan.FromSeconds(0);
                myColorAnimation.Duration = TimeSpan.FromSeconds(.5);
                myColorAnimation.FillBehavior = FillBehavior.HoldEnd;

                DiffuseMaterial material = targetModel.Model.Material as DiffuseMaterial;
                Storyboard.SetTarget(myColorAnimation, material.Brush);
                Storyboard.SetTargetProperty(myColorAnimation, new PropertyPath(SolidColorBrush.ColorProperty));

                Storyboard myStoryboard = new Storyboard();
                myStoryboard.Duration = TimeSpan.FromSeconds(3);
                myStoryboard.RepeatBehavior = RepeatBehavior.Forever;
                myStoryboard.Children.Add(myColorAnimation);
                myStoryboard.Begin();

mfoste wrote at 2013-07-03 22:21: