charismatubagus wrote at 2013-01-25 07:50:

Hi I am a newbie in HelixToolkit. I would like to load 3D model (.obj and .mtl) into the scene. However, I can only load the object. The material can't be seen.  

This is my code.

<h:HelixViewport3D Canvas.Left="377" Canvas.Top="253" Name="helixViewport3D1" Margin="195,190,185,12">
     <h:FileModelVisual3D x:Name="model3D" >
                
     </h:FileModelVisual3D>
</h:HelixViewport3D>

string _3DClothPath = (string)Application.Current.FindResource("3DClothes");
model3D.Source = _3DClothPath;

rinaldin wrote at 2013-10-27 13:25:

For Each element As ContainerUIElement3D In HelixViewport3D1.Children
                Dim position = Overlay.GetPosition3D(element)
                Dim position2D = matrix.Transform(position)
                If position2D.X > rectOrig.X And position2D.X < (rectOrig.X + rect.Width) And _
                   position2D.Y > rectOrig.Y And position2D.Y < (rectOrig.Y + rect.Height) Then
                    ' select element
                    Dim element1 = TryCast(sender, ModelUIElement3D)
                    Dim model = TryCast(element1.Model, GeometryModel3D)

                    If model.Material Is Materials.Green Then
                        model.Material = Materials.Yellow ' is selected!
                    ElseIf model.Material Is Materials.Yellow Then ' deselect
                        model.Material = Materials.Green
                    End If

                End If

            Next

rinaldin wrote at 2013-10-28 15:52:

rinaldin wrote at 2013-12-20 20:31:

objo wrote at 2014-01-07 22:34:

AnotherBor wrote at 2014-01-08 02:15:

objo wrote at 2014-01-08 07:30:

Lainy wrote at 2013-10-18 23:04:

DK_danik wrote at 2013-10-22 13:56:

RobPerkins wrote at 2012-11-08 17:28:

I'm trying to think of a way to add something like a BillboardVisual3D such that its position stays fixed relative to the camera. Ultimately it would have an ArrowVisual3D reaching from the Billboard into the model space itself, pointing at a feature. 

This would mean that as the camera is rotated, panned, zoomed, etc, the control would stay "stuck" to the front of the frustum, as it were. 

If I understand things correctly the camera in Helix3D is the thing doing the moving during panning, rotating, and zooming; no transformations are computed on the model itself. 

How would you approach this?

objo wrote at 2012-11-12 22:15:

Yes, in this library the camera properties are modified, not the world or camera transforms.

You need to update the 3D positions of your visuals each time the camera move. I think you could create a plane at the camera 'target' position, with the camera direction as the normal vector. Then use Viewport3DHelper.GetRay and Ray3D.PlaneIntersection to calculate the 3D positions.

RobPerkins wrote at 2012-11-12 23:05:

Good; that signifies an approach I could take. What if instead of doing that, we simply position the control in the visual tree as a 2D ContentControl atop the viewport, and then extend an ArrowVisual3D from the frustum front to a world coordinate? Would the same ViewPort3DHelper and Ray3D methods be useful, or is there something simpler?

(Yes, I can figure this out on my own, but I thought the discussion here would be beneficial to others.)

objo wrote at 2012-11-13 06:05:

Yes, that should also work - I have tested 2D overlays in the ExampleBrowser/OverlayDemo. The "target" adorner and "zoom by rectangle" features in HelixViewport3D are also 2D overlays.

AQSRanck wrote at 2014-07-01 20:31:

objo wrote at 2014-07-02 13:11:

foreach (var vertex in yourPolygon)
  yourMeshBuilder.AddBox(vertex, 1, 1, 1);

AQSRanck wrote at 2014-07-02 15:35:

AQSRanck wrote at 2014-07-04 21:47:

AQSRanck wrote at 2014-07-23 15:23:

andrey7b wrote at 2012-11-20 11:16:

I'm using the components of the helixtoolkit to my application and I came across the following situation, when I create an object, a rectangle, for example, and within it I create another object, of type square, only smaller, I can't seem to find the events for this object, I want to move it using the mouse, how should I proceed? Or object created in this way does not have events?

MalcolmWadia wrote at 2012-11-28 12:57:

Hi,

Great job with this toolkit!

We are using a standard hit-test method in the Helixviewport3d but was wondering if anyone knew the best way to implement, for example, a box select method?

There doesn't seem to be any specific selector classes but it might be nice to have these.

rinaldin wrote at 2013-09-29 17:08:

PhilDotC wrote at 2014-04-17 23:12:

objo wrote at 2014-04-29 10:18:

PhilDotC wrote at 2014-04-29 13:02:

objo wrote at 2014-05-05 15:03: