terry_513 wrote at 2014-01-29 11:16:

        private void DrawSections()
        {
            double x = 0, y = 0;
            int i=0;
            SolidColorBrush[] brushes = new SolidColorBrush[]{Brushes.Red, Brushes.Purple, Brushes.Gold, Brushes.Green, Brushes.YellowGreen, Brushes.Turquoise, Brushes.Wheat, Brushes.Pink, Brushes.PaleVioletRed, Brushes.Olive};

            foreach (Section sec in areasList_Scaled)
            {
                RectangleVisual3D rect = new RectangleVisual3D();
                rect.Origin = new Point3D(x, y, 0);
                rect.Length = 120;
                rect.Width = sec.Length;   // myRect.Width;
                //rect.Fill = Brushes.Lavender;   // new SolidColorBrush(Colors.LightCoral);
                rect.Material = new DiffuseMaterial(brushes[i]);
                i++;

                Console.Write("RECT LEN = " + sec.Length);

                y += sec.Length;
                wellViewport.Children.Add(rect);
            }
        }

objo wrote at 2014-01-29 19:49:

terry_513 wrote at 2014-01-30 06:55:

ronnyek wrote at 2012-05-10 17:07:

I am looking at creating a plane that when in the overhead view, I'd like to be able to draw a rectangle to represent selection. (like what you might see when lasso'ing a bunch of icons in windows.

I'm struggling to find out a way to draw a rectanglularvisual... and was hoping perhaps someone can point me in the correct direction.

I've got the mouse down/move/up events setting upper left and lower right of a rectangle, but seeing as rectangularvisual 3d uses origin etc, I cant just plug those values in. 

ondown, check mouse buttons, findnearestpoint set variable to that if there is a value

onmove, if dragging, create rectangular visual if not null, and then set its origin to x-x/2 and y-y/2. (z dimension shouldnt really matter in this case.

Is there an easier way to do this? (I couldnt get this to work anyway)

objo wrote at 2012-05-10 22:07:

yes, the RectangleVisual3D is defined by Origin, Width and Length.

If you want to draw a rectangle aligned with the X and Y axes in the z=0 plane, e.g. from P1=Point3D(x1,y1,0) to P2=Point3D(x2,y2,0), you could set

Normal = new Vector3D(0,0,1)
LengthDirection = new Vector3D(1,0,0)
Origin = P1+(P2-P1)*0.5
Length = Math.Abs(P2.X-P1.X)
Width = Math.Abs(P2.Y-P1.Y)

CornelRo wrote at 2012-11-07 09:03:

Thanks for the code above, I am also trying to make a selection box by creating a RectangleVisual3D to always face the camera regardless of the camera position. With the above code I made this possible, but only if the camera is in the standard views(F,B,L,R,U,D).

Does anybody know how to calculate the Normal & LengthDirection of the RectangleVisual3D depending on the Camera settings?

objo wrote at 2012-11-07 09:20:

see Source\HelixToolkit.Wpf\Visual3Ds\ScreenSpaceVisuals\BillboardVisual3D.cs

SagarDabas wrote at 2013-02-10 06:08:

objo wrote at 2013-02-10 16:11:

SagarDabas wrote at 2013-02-11 15:07:

public partial class MainWindow : Window
    {
        
        public MainWindow()
        {
            InitializeComponent();
            CameraController controller = this.myViewPort3D.CameraController;
            if(controller == null)   Console.WriteLine("Controller is null");
            DataContext = this;
        }    
    }

objo wrote at 2013-02-11 16:52:

SagarDabas wrote at 2013-02-11 17:42:

cobra18t wrote at 2011-12-13 16:12:

I am trying to follow your Voxel example to highlight a 3D model in the viewport when the user mouses over it. I have multiple Model3D objects in the viewport and the hit testing works fine until I start adding transforms to the Model3Ds. Even if the model is transformed to say (100,20,0), the hit testing reports a Model3D that is positioned at its original location, (0,0,0). I tried to determine which model was moused over by the bounding box of the orignal model and the bounding box of the hit result, but this only worked for some of the models. Any ideas? should I be using a different object type?

cobra18t wrote at 2011-12-13 17:33:

Additionally, hits.First().Position is reporting a position that is scaled with the same scale transformation of the model that is moused over. So when mousing over a model so that the mouse is hitting point (1,1,1) on the surface of the model, Position reports (5,5,5) as the hit point since the model is scaled by 5 in each dimension. Is there a way to apply the transformation permanently to avoid these discrepancies?

objo wrote at 2011-12-13 18:38:

have a look at HelixToolkit.Wpf.Viewport3DHelper.GetTransform to get the total transforms applied to the Visual3Ds and Model3Ds in your hits.

Also see the Viewport3DHelper.FindNearestPoint method!

valdis1987 wrote at 2013-08-15 14:07:

 <Helix3D:HelixViewport3D x:Name="Mainviewport">
..Camera
<Helix3D:HelixVisual3D  x:Name="Scene">
..Inside is  <Helix3D:HelixVisual3D.Content><Model3DGroup> with deep tree with   Model3dGroup[...]
</<Helix3D:HelixVisual3D>

<Helix3D:HelixVisual3D  x:Name="Obje1"/>
<Helix3D:HelixVisual3D  x:Name="Obje2"/>
<Helix3D:HelixVisual3D  x:Name="Obje3"/>
<Helix3D:HelixVisual3D  x:Name="Obje4"/>

</Helix3D:HelixViewport3D>

AQSRanck wrote at 2014-06-28 04:12:

objo wrote at 2014-07-02 13:19:

AQSRanck wrote at 2014-07-02 15:21:

alexalthauser wrote at 2013-04-03 23:43:

objo wrote at 2013-04-15 12:22:

MrNikito wrote at 2013-09-12 17:01:

<helix:HelixViewport3D CameraRotationMode="Trackball" ZoomExtentsWhenLoaded="False">

                            <helix:HelixViewport3D.Camera>
                                <PerspectiveCamera Position="0,0,0" LookDirection="0,6,0" UpDirection="0,0,1" NearPlaneDistance="0.01" FarPlaneDistance="1000" FieldOfView="57"/>
                            </helix:HelixViewport3D.Camera>

                            <helix:SunLight/>
                            
                            <ModelVisual3D Content="{Binding Model}"/>
                        </helix:HelixViewport3D>

MrNikito wrote at 2013-09-25 17:15:

karunakarreddy123 wrote at 2014-06-10 16:07:

    We also facing same issue. Can you please give more details how you resolved the issue, if possible can you share code snippet for the same.

MrNikito wrote at 2014-09-01 06:51:

helixViewport.CameraController.AddRotateForce(vector.X, vector.Y); 

helixViewport.CameraController.AddZoomForce(force);

mcrxb wrote at 2012-02-09 17:51:

I'm receiving the following error when trying to add a revolved geometry:

Cannot implicitly convert type 'void' to 'System.Windows.Media.Media3D.Geometry3D'

My code looks like this:

private IList<Point> profile = new List<Point>();
private MeshBuilder mb = new MeshBuilder();

profile.Add(new Point(0, 0));
profile.Add(new Point(ShankRadius, 0));
profile.Add(new Point(ShankRadius, ShankLength - ChamferOffset));           
GeometryModel3D ShankGeometry = new GeometryModel3D();
ShankGeometry.Geometry = mb.AddRevolvedGeometry(profile, new Point3D(0, 0, 0), new Vector3D(0, 1, 0), 30);
ShankGeometry.Material = Materials.Hue;
ShankGeometry.BackMaterial = Materials.Hue;
vc.Add(ShankGeometry);

I get the error on the ShankGeometry.Geometry line. Any help would be greatly appreciated!

objo wrote at 2012-02-13 20:06:

try

mb.AddRevolvedGeometry(profile, new Point3D(0, 0, 0), new Vector3D(0, 1, 0), 30);
ShankGeometry.Geometry = mb.ToMesh();

mcrxb wrote at 2012-02-21 14:10:

That worked perfect, thank you. One follow up question: I'm adding the revolves to a Model3D collection and want to set a different color for each revolved geometry (say I have two cylinders stacked on top of each other, one red and one blue) but for some reason it only uses the material of the last object added to the collection...do I need to clear this somehow? Should I be creating a new MeshBuilder for every revolve?

objo wrote at 2012-02-21 14:22:

you need a new GeometryModel3D to define objects with different materials. Geometry can be reused, but I think it is necessary to freeze (use the freeze argument in the MeshBuilder.ToMesh method).

mcrxb wrote at 2012-02-21 14:28:

I'm creating a new GeometryModel3D every time I add to the collection:

points.Add(new Point(0, 0));
points.Add(new Point(0, 1));
points.Add(new Point(1, 1));

mb.AddRevolvedGeometry(points, new Point3D(0, 0, 0), new Vector3D(0, 1, 0), 50);
vc.Add(new GeometryModel3D(mb.ToMesh(), Materials.Gray));
points.Clear();

points.Add(new Point(0, 0));
points.Add(new Point(0, 2));
points.Add(new Point(2, 2));

mb.AddRevolvedGeometry(points, new Point3D(0, 0, 0), new Vector3D(0, 1, 0), 50);
vc.Add(new GeometryModel3D(mb.ToMesh(), Materials.Blue));
points.Clear();

objo wrote at 2012-02-21 20:47:

I think you should also create a new MeshBuilder every time - the add methods are not clearing the existing mesh in the MeshBuilder.

MattyBoy wrote at 2014-04-09 17:17:

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

objo wrote at 2014-04-29 10:32:

MattyBoy wrote at 2014-05-01 19:38:

objo wrote at 2014-05-05 14:56:

sion005 wrote at 2011-10-26 17:49:

Greetings, I'm using Helix in an application to view 3d models, however, when I import the model, it's all black, with no materials. I tried several models, including the ones used on the Studio example, but the result was the same. Probably I'm doing some newbie mistake, but i would appreciate some tips to solve this.

 Here is the code that I use to load the model:

 // Fields
private TerrainCreator tc;
private Model3D CurrentModel;
private ModelVisual3D render;


public MainWindow()
{
this.InitializeComponent();

this.render = new ModelVisual3D();

this.CurrentModel = ModelImporter.Load("C:\\Users\\Pedro\\Desktop\\Helix\\HelixToolkit-Examples\\StudioDemo\\Models\\Ferarri40.3ds");

this.render.Content = this.CurrentModel;
this.view.Add(render); // this is the HelixView3D

}

objo wrote at 2011-10-26 20:43:

hi Pedro! a simple question first: did you add lights to your scene? Helix toolkit has a couple of light visuals, and also a 'headlight' in the HelixViewport3D control.

sion005 wrote at 2011-10-31 15:49:

Problem solved. I didn't had any lights! Thanks a lot!