Hello, After Loading large 3d file（.3ds）,when rotational model is too slow, what is a good way to improve?let rotating faster

Hello!

Guys,after sharpdx forked, Is there simple project about 3D modelling or editing on primitives ???

thanks, ..

if i zoom with scroll or other keys position of camera will change which is linear changing
I need zoom factor is there any built in zoom factor or something which i can use?
there is some explanation about zoom factor and zoom in mm in this link:
http://chrisjones.id.au/FOV/fovtext.htm

This is an interesting idea. Do I understand correctly - zooming should be done linearly in angle of view (fov) or focal length?
I have added the feature in the issue tracker: https://helixtoolkit.codeplex.com/workitem/10068

Yep

Hi All;

I'm very new in wpf and helix3d.
I have a 3d mesh model. The center of model positioned at Point3D(0,0,0). I want to cut the mesh which all vertices in positif Y axis.

  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;

But i got the broken mesh. Any suggestions/ideas ?

Best Regards;
DM

Hi All;

I found the solution.

        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);

But i've another problem. When I added the manipulator (CombinedManipulator) to the ModelVisual3D object.
After rotating the mesh, I want to cut the mesh. But the cut direction still follow the mesh direction, not the viewport direction.

Any idea?

Hi All;

to precisely cut the mesh, i need to convert the model coordinate to global coordinate.

Regards;
DM

Ho can I move all Manipulators adorner (by code C#) when for example I move X TranslatorManipulator? The code is working correctly because I can rotate and translate object, but adorners are fixed in the starting position.

My translator is

            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;

If I remove offset all is working, but adorners are not correctly centered

Best regards

Hi there!
Thanks objo a lot for your great tools!

Doesn't anybody know what can be a problem for smoothing in Helix 3D Toolkit? I have a little bit strange case.. I got an .obj file with complex 3d-model which I want to be smooth. There are 2 "s on" lines in this file. I don't remember exactly but there was some issue while smoothng - and I set currentSmoothingGroup in ObjReader always to be 1.. And that helped, part of the 3d-object is now smooth. But only part.. For example I have a 3d-model of jaw - some teeth are smooth, some - very rough - there is clear difference. Using other 3d-viewers I can see all of the teeth are smooth.

In this file there are 2 "s on" lines - one before all vertices part, another one before faces. Plus there are a lot of separated "groups" (part of vertices or faces that start with "g"). I don't know maybe that is the problem - but groups with the same names are separated all over the file - ie that can be:
g Name1
...
g Name2
...
g Name1


I also tried to change some code in ObjReader - for example in AddGroup method in the beginning I put a line

if (Groups.Any(x => x.Name == name)) { return; }

And it partially helped - all teeth were smooth, but mesh in general was a little bit broken.. Than I changed smoothingGroupMap first parametr to be not int but the name of the group - for every group to have its own smoothing map (cause in original code after adding a group smoothing maps were destroyed) - but it made everything even worse. :(

Has anybody any ideas why there can be part of 3d-model smooth, and part of it - absolutely rough?

Does it look correct in other software? (try meshlab)
I guess there could be a bug in the obj importer. In that case we should have a small test file and create an issue on this!

Yes, exactly, I tried Meshlab :) And there when I switch on "Smooth" - it becames smooth, all of the teeth.

I can send you this .obj file..

This is how it looks:
Using HelixToolkit
Using MeshLab

I feel like there can be an issue with Groups...

By the way, this is what happened after inserting

 if (Groups.Any(x => x.Name == name)) { return; } 

line in AddGroup method:
After

Close enough, but appeared some clearly visible trouble with a few tens triangles on a problem part of the model...

And here is that .obj file - https://dl.dropboxusercontent.com/u/63365590/problematic_smoothing.obj

Thanks for providing the file! I have added the issue at https://helixtoolkit.codeplex.com/workitem/10067