sandualbu wrote at 2011-12-15 22:36:

This is a really cool project, i like it. I'm thinking about integration with kinect SDK.  Wouldn't it be nice to zoom in/out and rotate objects using only hands movement?

objo wrote at 2011-12-19 09:16:

Yes, a demo using the Kinect SDK would be very interesting! Are you only thinking manipulating objects or also manipulating the camera? Which gestures could be used? Do you have links to some good kinect demos of 3D interaction?

sandualbu wrote at 2011-12-19 14:22:

i'm thinking about both..camera and object rotation... you can take a look at kinesis project. it performs zooming/scrolling and chart rotation (not on 3d objects, of course, but the idea can be developed more). Kinesis works with menus, but something which combine several movements can be built for manipulating 3d objects.

you can perform the rotatation operation as a real time rendering, depending on distance / elevation between hands, and not composed from multiple oprations (up/down/right/left), like kinesis is doing.

The most significant aspect i can think now, is to make kinect interaction as a kind of plugin, and not make helix dependent of it.

objo wrote at 2011-12-19 14:35:

Have a look at the SpaceNavigator implementation. Maybe the Kinect implementation can be done in a similar way (I don't think it should be handled as mouse/touch events).

I agree, a Kinect implementation should be in a separate assembly - suggesting the name HelixToolkit.Kinect.

I'll add the kinect sensor to my xmas wish list, so I can test this :)

sandualbu wrote at 2011-12-19 14:49:

is too hard what the space navigator is doing...I mean he wants to construct something....i think you want just to present 3dobjects, not build them with hands. I'm thinking more like what the guy is doing when presenting the universe with kinect (http://www.youtube.com/watch?v=GMZcz_tlGqw)

objo wrote at 2011-12-21 21:50:

Did you see
http://channel9.msdn.com/coding4fun/kinect/Kinect--3D--Fusion4D
http://www.interlab.pcs.poli.usp.br/fusion4d/

sandualbu wrote at 2011-12-22 07:49:

thta's just amazing. The only disadvantage is the red-cyan glasses. But the gestures used are pretty much like what I was thinking about your project. Of course, making the application render on 120hz display and a pair of active glasses will improve a lot the quality of image.

MrNikito wrote at 2013-09-12 17:33:

objo wrote at 2013-09-29 09:07:

jeeva_sjce wrote at 2013-09-03 06:12:

objo wrote at 2013-09-05 07:56:

jeeva_sjce wrote at 2013-09-06 11:50:

jeeva_sjce wrote at 2013-09-30 10:20:

starcrm wrote at 2012-07-27 14:43:

objo wrote at 2012-08-09 00:53:

Reduce the level-of-detail? Sorry, it is not implemented in this library. 

elkhalafy wrote at 2014-02-22 11:58:

behnam263 wrote at 2014-08-16 07:43:

objo wrote at 2014-08-18 13:22:

behnam263 wrote at 2014-08-20 18:00:

edui wrote at 2013-03-05 07:20:

  foreach (GeometryModel3D gm in mg.Children)
        {
            MeshGeometry3D mesh = (MeshGeometry3D)gm.Geometry;
            Point3DCollection positions = mesh.Positions;
            Vector3DCollection normals = mesh.Normals;
            Int32Collection indices = mesh.TriangleIndices;

            Point3DCollection newPositions = new Point3DCollection() ;
            Vector3DCollection newNormals = new Vector3DCollection();
            Int32Collection newIndices = new Int32Collection();
            int c = 0;
            foreach (Point3D p in positions)
            {
                if (p.Y >= 0)
                {
                    newPositions.Add(p);
                    newNormals.Add(normals.ElementAt(c)); //I'm not sure in this line
                    newIndices.Add(indices.ElementAt(c));
                }
                c++;
            }

            GeometryModel3D gd = new GeometryModel3D();
            MeshGeometry3D g = new MeshGeometry3D();
            g.Positions = newPositions;
            g.Normals = newNormals;
            g.TriangleIndices = newIndices;
            gd.Geometry = g;
            gd.Material = MaterialHelper.CreateMaterial(Colors.Aquamarine);
            nm.Children.Add(gd);
            nm.Transform = new TranslateTransform3D(new Vector3D(d.Bounds.X, d.Bounds.Y, d.Bounds.Z)); //translate to another positioned
        }
        ModelVisual3D v = new ModelVisual3D();
        v.Content = nm;

edui wrote at 2013-03-21 10:29:

        var n = new Vector3D(0,0.2,1);
        var p = new Point3D(0, 0.5, 0);

            var geo = MeshGeometryHelper.Cut(mesh, p, n);
            var m = new GeometryModel3D(geo, gm.Material);
            m.BackMaterial = Materials.Red;
        var mv = new ModelVisual3D();
        mv.Content = m;
        view1.Children.Add(mv);

edui wrote at 2013-03-25 08:45:

gmgunderground wrote at 2014-05-16 12:02:

            translateManipulatorX.TargetTransform = mv.Content.Transform;
            translateManipulatorX.UnBind();
            translateManipulatorX.Bind(mv);
            translateManipulatorX.Length = Math.Max(mv.Content.Bounds.SizeX, Math.Max(mv.Content.Bounds.SizeY, mv.Content.Bounds.SizeZ)) * 1.2;
            translateManipulatorX.Offset = new Vector3D(mv.Content.Bounds.X + mv.Content.Bounds.SizeX, mv.Content.Bounds.Y + mv.Content.Bounds.SizeY / 2, mv.Content.Bounds.Z + mv.Content.Bounds.SizeZ / 2);
            translateManipulatorX.Visibility = System.Windows.Visibility.Visible;

chinh_nguyen wrote at 2013-01-09 13:27:

Hi, how can I create a thick cone using the library, if I use the AddCone method without cap, it is too thin that in some angle, the cone disappear.

chinh_nguyen wrote at 2013-01-10 08:45:

Hi all, I achieved the disappear problem by setting BackMaterial properties. It is not a thick cone yet but solve my problem.