Hi,

I have a question about LineVisual3D.
Is there a way to add tiny arrow head at the end of the line segment(s)?

I think this must be implemented in a new class similar to the LinesVisual3D. Each segment should then be defined by 3 triangles, and the 3 extra coordinates should be calculated a similar way as in LineGeometryBuilder.CreatePositions

Yeah I figured that out but was just hoping so much that you say something like "there is this innocent looking property which you could use to..." :D
I checked how LineGeometryBuilder does the computations and it's beyond what I can tackle in my time frame allotted for this.

Petzold line class has this functionality. Maybe you can reuse it for your own needs.

Yes it is an option but if I remember well Petzold line class is about 25% slower than Helix (with lines only, compared in the PointsAndLinesDemo by looking at the FPS counter).
I will try it out if arrows become a must in my project. For now lines are ok.

Could someone provide an example using Petzold line to display a visual arrow? Thank you very much

Dear all,
I have suind demo of this toolkit in one of my project but in a collaborative application form, the center target which appears when you touch or click with mouse is enoying people sometimes.

Is there a way to hide this symbola as well as the box at bottom right corner ?

thanks
regards

ShowCameraTarget="False" ShowViewCube="False"

Hi
I am new to Helix and trying to create a simple box with transparent at run time with C#. I can see the box showing with transparency but there is no colour on the box. I dont know if i did anything wrong in my small piece of code:

        Objects = new ObservableCollection<Visual3D>();
        Objects.Add(new GridLinesVisual3D());
        var color = Color.FromArgb(0x80, Colors.Red.R, Colors.Red.G, Colors.Red.B);

        var b = new BoxVisual3D()
            {
                Width = 10,
                Length = 10,
                Height = 10,

            };

        var brush = new SolidColorBrush();
        brush.Color = color;
        b.Fill = brush;
        Objects.Add(b);

Thank you very much in advance.
Best regards

1. Did you add lights to your model?
2. I checked the BoxVisual3D class with

<ht:BoxVisual3D Width="10" Height="10" Length="10" Fill="#80FF0000"/>

and this works fine

Note that you cannot get 100% correct visualization of transparency for a box in WPF...

You could also use the ChangeAlpha extension method: b.Fill = new SolidColorBrush(Colors.Red.ChangeAlpha(0x80))

First of all I would like to thank you for this great job.
In my scene i have tow superposed CubeVisual3D like this :
<ht:CubeVisual3D x:Name="plateau" Width="140" Length="180" Height="15" Center="0 0 -5" TopFace="False" BottomFace="False" Fill="SteelBlue">

            <ht:CubeVisual3D.Children>
                <ht:GridLinesVisual3D Width="140" Length="180" MinorDistance="5" Center="0 0 -11" Fill="SteelBlue"></ht:GridLinesVisual3D>
            </ht:CubeVisual3D.Children>
        </ht:CubeVisual3D>

        <ht:CubeVisual3D x:Name="Cover" Width="140" Length="180" Height="15" Center="0 0 10" TopFace="False" BottomFace="False" Fill="#4C58ABF0">                
            <ht:CubeVisual3D.Children>
                <ht:GridLinesVisual3D Width="140" Length="180" MinorDistance="5" Center="0 0 17" Fill="SteelBlue" Thickness="1"></ht:GridLinesVisual3D>
            </ht:CubeVisual3D.Children>

        </ht:CubeVisual3D>

for this moment i rotate le outside CubeVisual3D called "Cover" like this :
<ht:BindableRotateManipulator x:Name="Rotation1" InnerDiameter="1" Diameter="5" Length="175" Position="0 70 2 " Color="SteelBlue"

                                      Value="{Binding CoverRotateValue}" 
                                      Axis="-1 0 0" AllowDrop="True" TargetTransform="{Binding ElementName=Cover, Path=Transform}">

I want please enable rotation by a click on the Cube called "Cover", Is It possible ??
thank you in advance

CubeVisual3D is based on ModelVisual3D and does not support click events. I think you need to create a Visual3D based on ModelUIElement3D to handle mouse clicks on a cube.

Try setting IsHitTestVisible = false on the manipulator to disable it (but I think a "Enabled" property on the Manipulator class could be a good idea!)

Hello.
Sometimes i tried to add a Mesh3D to the Mesh property of a MeshVisual3D, I get this exception:
'System.OutOfMemoryException' was thrown'

The code

            MeshGeometry3D modeltodraw = new MeshGeometry3D();
            // fill modeltodraw 
            var originalMesh = new Mesh3D(modeltodraw.Positions, modeltodraw.TriangleIndices);
            var bounds = originalMesh.GetBounds();
            var l = Math.Max(bounds.Size.X, Math.Max(bounds.Size.Y, bounds.Size.Z));
            model1.Mesh = null;
            try
            {
                model1.Mesh = originalMesh;
            }
            catch (System.Exception ex)
            {
                System.Windows.Forms.MessageBox.Show( ex.Message);
            }

The Mesh3D seems to be a little bit huge :

Edges Count = 125631
Faces Count = 612956
Vertices Count = 125631

Any idea why i got this exception

Best Regards,

I haven't used MeshVisual3D yet but I think it creates a geometry from your mesh. The geometry is made with cylinders and spheres for the vertices and edges. So each edge/vertex converts into several (maybe 10-50 times more complex). So I think it's normal for you to get that exception as your computer can't handle it.

If you really need to see your mesh I recommend LinesVisual3D. It's not the best but you will be able to see your huge mesh with that. Good luck

Thanks for your reply, but did you know how to create mesh from Positions and TriangleIndices using LinesVisual3D .

@Moez_rebai,

Do you run Anvir, or even Task Manager to see which resources are expended? I think there is a memory debugger built into VS I read about, but never used. I use the threading one all the time, though. I think you can 'profile' your app, and it will show you over time how it is performing.

Check out the "ANALYZE" pull-down menu in VS, too!

pat
:)