AB4D Forum - Ab3d.PowerToys

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Wed, 01 Apr 2026 13:45:08 +0200

This forum is closed because of problems with sending emails.

Please use Issues or Discussions on the GitHub Ab3d.PowerToys.Wpf.Samples repo.

AxesBoxVisual3D font scaling

Mon, 01 Sep 2025 10:36:04 +0200

Hi,

I am drawing a heightmap inside an axesbox.

To make things more visible in the heightmap I apply a scaletransform to increase the apparent height.

However, if I also apply this to the axesbox then the fonts of the values on the axis get stretched. Is there a way to avoid this? I can't find the text visuals objects in the hierarchy.

Thanks in advance!

Collision Detection

Thu, 26 Jun 2025 18:14:25 +0200

Hello,

Just wondering if there is any support in these tools for collision detection between two Meshes/Visuals/etc?

Unfortunately the meshes have rotations, so bounding box checks aren't quite enough.

Thanks in advance for your help!

Boolean subtraction over a transformed distance

Tue, 20 May 2025 11:51:59 +0200

Hi. I am interested in this product. I need to do boolean subtractions on a mesh and display them.

I need the subtraction to be done over a distance. I think this would be done using a transform. However, the code :

TranslateTransform3D translateTransform3D = new TranslateTransform3D();
translateTransform3D.Transform(new Vector3D(0, 0, 200));
var subtractedMesh1 = Ab3d.Utilities.MeshBooleanOperations.Subtract(boxMesh, combinedMesh, translateTransform3D, processOnlyIntersectingTriangles: true, generateInnerTriangles: generateInnerTriangles);
ShowMesh(subtractedMesh1, -120);

Starts to get confused between MeshGeometry3D, Geometry3D and ModelVisual3D. Is it possible? I need to be able to have
a pointed cone like a pencil tip, and the drag this across a the surface of a cube mesh.

How to output an object to upper left corner

Sun, 04 Aug 2024 01:53:19 +0200

I have a diagram that I wish to start in the upper left corner. I can do this setting the camera with FitIntoView but I don't want the entire diagram to be displayed.

My understanding is that position (0, 0, 0) is the center of the screen and if I make the X coordinate of an objet negative, the object location moves to the left.

In your sample code Lines3DSample, the first line is drawn with:

How do I calculate the StartPosition so that that line starts in the upper left hand corner?

Rotation problem

Fri, 02 Aug 2024 10:23:17 +0200

Hi,

I wanted to report a problem in the Ab3d samples, in particular in the section "ModelMover and ModelRotator" which refers to the file ModelMoverAndRotatorSample.xaml.cs.
If I initialize the variable "_zAxisAngleRotation3D" with the z axis and an angle of 90 degrees i.e. I apply to the object an initial rotation of 90 degrees around the z axis, then there are some problems with the rotation. For example, if I rotate the object around the x axis, it rotates around another axis different from x.
I think that the problem is in the following line:

"_transform3DGroup.Children.Insert(_transform3DGroup.Children.Count - 2, rotateTransform3D) "

The comment before this line tells "insert before TranslateTransform3D" but in order to insert before TranslateTransform3D I think that the index should be "_transform3DGroup.Children.Count - 1". If I implement this modification, then I have no more problems with the rotation.

Thank you for your time,
Matteo

Create a HeightMapVisual3D map from a list of Point3D

Mon, 01 Apr 2024 11:10:40 +0200

Hi,
I want to create a HeightMapVisual3D map from a list of Point3D. I have a bunch of 2000 point3D points and I want to create a heightMap from those points. How to do that?

Checking availability of assimp c++ source

Sat, 02 Mar 2024 13:30:06 +0100

hello. I'm currently using Ab3d.PowerToys. Can you provide libraries or source to integrate with C++?

I'm trying to write a tool using QT, but I need a C++ library or source code.

thank you

WPF UserControl Issues

Fri, 23 Feb 2024 03:53:24 +0100

When a Winform with WPF UserControl added is displayed in an MDI window, the size cannot be changed.

Please confirm.

thank you

Redimension the List of SphereVisual3D

Thu, 04 Jan 2024 09:35:05 +0100

How can I redimension the size of the list of spheres but not depending on the spheres' position?
I have an ensemble of 200-300 spheres and I want to redimension them proportionally, in order so that the nodes are the same size visually.
I want all the nodes to have the same dimension indifferent to the node position. In my case, when I zoom the camera with the mouse, many nodes (spheres) will not be seen.
This is the codebase:
// for nodes (list of sphere visual 3d)
for (int i = 0; i < nodes.Count; i++)
{
try
{
var centerPoint = new Point3D(0, 0, 0);
var selectedNodes = nodes.Where(s => s.Radius == 0.51).ToList();
if (selectedNodes.Count() == 1)
{
centerPoint = selectedNodes[0].CenterPosition;
}

Size worldSize = Camera1.GetWorldSize(new Size(6.2, 2), centerPoint); // not sure how it works (to be investigated)
var scaleTransform3D = nodes[i].Transform as ScaleTransform3D; // not sure how it works (to be investigated)

scaleTransform3D = new ScaleTransform3D();

// To prevent scaling the position (multiplying it with the scale factor), we need to set the center of scale
scaleTransform3D.CenterX = nodes[i].CenterPosition.X;
scaleTransform3D.CenterY = nodes[i].CenterPosition.Y;
scaleTransform3D.CenterZ = nodes[i].CenterPosition.Z;

nodes[i].Transform = scaleTransform3D;

double scaleFactor = worldSize.Width / 1;
scaleTransform3D.ScaleX = scaleFactor;
scaleTransform3D.ScaleY = scaleFactor;
scaleTransform3D.ScaleZ = scaleFactor;
}
catch { }
}

After upgrading to PowerToys 11.0 i have a problem with "BoxVisual3d.Children"

Sat, 25 Nov 2023 13:09:25 +0100

Hi,

After upgrading to PowerToys 11.0 i have a problem with "BoxVisual3d.Children".

When i use the PowerToys 9.4 version the following code draws 2 boxes.

BoxVisual3D b = new BoxVisual3D();
b.Size = new Size3D(1000,1000, 1000);
b.Material = new DiffuseMaterial(new SolidColorBrush(Colors.Gold));
b.CenterPosition = new Point3D(0, 2000, 0);

b.Children.Add(new BoxVisual3D(){Size = new Size3D(500,500,500),CenterPosition = new Point3D(0,0,0),Material = b.Material});

MainViewPort3D.Children.Add(b);

But with the 11.0 version the "child" BoxVisual3D is not shown anymore.

Importing GLB with texture

Tue, 21 Nov 2023 19:04:28 +0100

Hi.
We are trying to import a GLB file with texture but it shows without any texture in the viewer.

Can you please help?
Is there some particular property that must be set to correctly load the GLB?

File GLB

Thanks

Lines intersection

Fri, 17 Nov 2023 09:58:27 +0100

How to get the Point3D of a two intersected lines?
I want to get the intersection Point3D of two or more lines (LineVisual3D) from VisualSpace (or ViewPort).

RenderToBitmap poor performance

Wed, 18 Oct 2023 10:14:10 +0200

Hi,

RenderToBitmap takes a long time (~60 seconds consistently) to render a 2048x2048 image. This seems excessive as in the onscreen view I can render in realtime.

Is this expected behaviour? If so, are there any workarounds for it?

I'm calling this routine:
public RenderTargetBitmap RenderToBitmap(Brush backgroundBrush = null, int dpi = 96);

Code:
     var viewport3D = new Viewport3D();

     viewport3D.Width = 2048;

     viewport3D.Height = 2048;

     var camera = new FirstPersonCamera();

     camera.Position = new Point3D(0, 0, 0);

     camera.Bank = 0;

     camera.Heading = 0;

     camera.Attitude = -90;

     camera.FieldOfView = 92;

     camera.TargetViewport3D = viewport3D;

     var displayModels = objs.AsModel3DGroup();

     foreach (var m in objs.Values)

     {

         viewport3D.Children.Add(m.CreateModelVisual3D());

     }

     camera.Refresh();

     Stopwatch renderStopWatch = new Stopwatch();

     renderStopWatch.Start();

     var img = camera.RenderToBitmap(backgroundBrush);    

     renderStopWatch.Stop();

Where I find MouseMovableUIElement3D

Thu, 31 Aug 2023 06:09:59 +0200

I need to use MouseMovableUIElement3D in my solution, and I didn't find the MouseMovableUIElement3D class. I thought that it would be in Ab3d.Controls but it wasn't. Where I will find it, to import it?