AB4D Forum - Viewer3ds and Ab3d.Reader3ds

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Triangulation method inquiry

Fri, 08 Mar 2024 05:35:39 +0100

I read the data using Reader3DS and wrote the code below, but something went wrong and the basic shape came out fine, but the triangular face came out broken.
help

for (int i = 0; i < model3D.Children.Count; i++)
{
switch (model3D.Children[i].GetType().Name)
{
case "GeometryModel3D":
foreach (var item in ((model3D.Children[i] as GeometryModel3D).Geometry as MeshGeometry3D).Positions)
{
double x = item.X; double y = item.Y; double z = item.Z;
mesh.Positions.Add(new Point3D(x, y, z));
}

foreach (int item in ((MeshGeometry3D)((GeometryModel3D)model3D.Children[i]).Geometry).TriangleIndices)
{
mesh.TriangleIndices.Add(item);
//double x = item.X; double y = item.Y; double z = item.Z;
//mesh.Positions.Add(new Point3D(x, y, z));
}

foreach (var item in ((MeshGeometry3D)((GeometryModel3D)model3D.Children[i]).Geometry).Normals)
{
double x = item.X; double y = item.Y; double z = item.Z;
mesh.Normals.Add(new System.Windows.Media.Media3D.Vector3D(x, y, z));
}

foreach (var item in ((MeshGeometry3D)((GeometryModel3D)model3D.Children[i]).Geometry).TextureCoordinates)
{
double x = item.X; double y = item.Y;
mesh.TextureCoordinates.Add(new Point(x, y));
}
gmodel.Material = ((GeometryModel3D)model3D.Children[i]).Material;
gmodel.Geometry = mesh;
break;
case "Model3DGroup":
break;

default:
break;
}

}

thank you

assimpWpfExporter conversion issue

Fri, 16 Feb 2024 08:02:07 +0100

hello

// Here we export Viewport3D:
assimpWpfExporter.AddViewport3D(viewport3D);

AssimpWpfExporter.ExportViewport3D(viewport3D, "D:\\test1.glb", exportFormatId);
bool isExported;

try
{
isExported = assimpWpfExporter.Export(fileName, exportFormatId);

// To export to an in-memory object use the ExportToDataBlob that returns a ExportDataBlob with byte array
//var dataBlob = assimpWpfExporter.ExportToDataBlob(exportFormatId);

//if (!isExported)
// MessageBox.Show("Not exported");
}
catch (Exception ex)
{
//MessageBox.Show("Error exporting:\r\n" + ex.Message);
isExported = false;
}

return isExported;

When you run the code above, a test.glb file is created, but when you open it in the viewer, it says it is an incorrect file.
I did the same as the example and it worked fine.
I would like to know where the problem is.

thank you

How to get a mesh and get mesh points

Wed, 14 Feb 2024 00:19:56 +0100

How to get a mesh and get mesh points

I am trying to create a triangular mesh on the web screen using Ab3d.Reader3ds.

thank you

How to read a 3DS file and output it to the Tree.js screen as json

Wed, 24 Jan 2024 23:21:02 +0100

I'm currently using ab3d.Reader3D.
I would like to read and display 3DS files on the web.
Is there a way?
Can you please write an example code?
please answer about my question.

Earlier versions of Reader3ds

Wed, 09 Sep 2020 20:24:51 +0200

Hi

Where is the archive to retrive your download to your older purchased software ?

Best regards
/Jens

Reader for DWG files

Wed, 10 Feb 2016 07:56:56 +0100

Is it possible to render Autocad DWG files using AB4D component? Any samples or reference available in this regard?

Difference in animation

Mon, 06 Apr 2015 23:55:01 +0200

Hi,

Some .3ds files are animated different in 3D Max and in Viewer3ds. Example is here https://www.dropbox.com/s/noa9apnmhlnmmhg/123.3DS?dl=0.

Brief description: Static image looks fine in both programs, animation - not. If we play it in 3D Max - everything is fine, but when we try to read and play it with Viewer3ds we can see one of elements, which is supposed to be inside of the main model object, is flying somewhere nearby. And during the animation, instead of rising from the model, it at first sinks in one side and then appears from another.

Is any possible solution to this problem?

Thanks
Andrew

Ab3d.Reader3ds library

Mon, 09 Feb 2015 10:08:09 +0100

I want to buy the SW "Viewer3ds" to open files with .3ds format and export to XAML.

I read in the description that the version without "Ab3d.Reader3ds library" puts "You can use Viewer3ds application to convert 3ds files into xaml. You can not use batch conversion Viewer3ds with application".

As stated in the initial message, I only I want to open the 3ds file and export the model exactly to XAML. I only need to use your SW to generate the XAML, I understand that I do not need the library, is that correct?

I've searched and it is not clear for me which means "batch conversion"

Thanks

reset colors

Sun, 04 Jan 2015 12:18:21 +0100

Last question I promise,

Is their anyway of reapplying a models normal colors (i.e how it was imported). I have a some models and when parts are clicked i have written code to change that parts color. (in this case to blue) but i am having a nightmare finding a good way to reset the color back to its original.

many thanks

fred

name of object

Fri, 07 Nov 2014 14:30:57 +0100

Hi,

I have been struggling with getting the name of a clicked object,

using the following code i can grasp the 3d model hit and change its color but i am struggling to get its name.

................
If rayMeshResult IsNot Nothing Then
Dim hitgeo As GeometryModel3D = TryCast(rayMeshResult.ModelHit, GeometryModel3D)

Dim mo As Model3D = (rayMeshResult.ModelHit)

end if

How can i now get the "GetNamedObjectsText"

any help much appreciated

fred

Hierarchy of NamedObjects

Sat, 19 Jul 2014 12:26:40 +0200

Hi,

I have just purchased reader3ds and power tools, so far really impressed but I am a bit lost on how i get the named objects in a model.

This is the code i am using to load in the model (In vb)
Dim file As String = "some location"

Dim modelgroup As New Model3DGroup

Dim Ab4dReader As New Ab3d.Reader3ds
modelGroup = Ab4dReader.ReadFile(file)
Dim ModelVisual3d As New ModelVisual3D
ModelVisual3d.Content = modelGroup
MainViewport.Children.Add(ModelVisual3d)
Dim myreader3ds As New Ab3d.Reader3ds

How can i now see the Hierarchy as a set of strings or lists? Ive looked at the robot arm demo and that is what i am after but i am not quite getting it.

any help would be great

Thanks

Fred

Writing files in .3ds or .obj formats

Wed, 26 Feb 2014 16:49:31 +0100

I see that there is both a reader and a vierer for .3ds (and .obj), but it is not clear to me whether I can write or export a file in these formats. I need to be able to create objects in my application and then open them in SketchUp PRO which can open either of these file formats.

Is this possible using your solution(s)?

Thanks,
Lloyd

Rotate the camera

Thu, 16 Jan 2014 14:50:35 +0100

Hi,

I´ve successfully realized the Rotation of a camera by code:

Code:
var rotateTransform3D = new RotateTransform3D { CenterX = 0, CenterZ = 0 };

            var axisAngleRotation3D = new AxisAngleRotation3D { Axis = new Vector3D(0, 1, 0), Angle = Convert.ToDouble(Slider2.Value) };

            rotateTransform3D.Rotation = axisAngleRotation3D;

            _robotArmReader3ds.Cameras[0].Transform = rotateTransform3D;

I´m using a slider to set the rotation angle.
I want to rotate all 3 axes of the camera:

Therefore I implemented 3 slides with the following codes:
Rotating x-axis:

Code:
var rotateTransform3D = new RotateTransform3D { CenterX = 0, CenterZ = 0 };

            var axisAngleRotation3D = new AxisAngleRotation3D { Axis = new Vector3D(1, 0, 0), Angle = Convert.ToDouble(Slider1.Value) };

            rotateTransform3D.Rotation = axisAngleRotation3D;

            _robotArmReader3ds.Cameras[0].Transform = rotateTransform3D;

Rotating y-axis:

Code:
var rotateTransform3D = new RotateTransform3D { CenterX = 0, CenterZ = 0 };

            var axisAngleRotation3D = new AxisAngleRotation3D { Axis = new Vector3D(0, 1, 0), Angle = Convert.ToDouble(Slider2.Value) };

            rotateTransform3D.Rotation = axisAngleRotation3D;

            _robotArmReader3ds.Cameras[0].Transform = rotateTransform3D;

And rotating z-Axis:

Code:
var rotateTransform3D = new RotateTransform3D { CenterX = 0, CenterZ = 0 };

            var axisAngleRotation3D = new AxisAngleRotation3D { Axis = new Vector3D(0, 0, 1), Angle = Convert.ToDouble(Slider3.Value) };

            rotateTransform3D.Rotation = axisAngleRotation3D;

            _robotArmReader3ds.Cameras[0].Transform = rotateTransform3D;

The problem is, that I rotate the x-axis by 30°. Than I rotate the y-axis by 20°. Now, the rotation of the x-axis is resetted to 0° first and the the y-Axis.
How can I rotate all 3axis by 3 sliders, without resetting axis?

michael

Textures are Not Applying

Thu, 18 Jul 2013 11:23:23 +0200

Hi,

When I am applying texture to specific Model3D from Model3d Group, its not displaying in the viewport. This is happening to very specific parts of the the models, whereas it working fine on other parts.

We have commercial license of Reader3ds, please let us know the issue.