NMorgan wrote at 2011-08-22 16:45:

I was wondering how I could get the cordinate bounds that are being displayed in a viewport?  For instance the top left corner is (-100,100) and the bottom left corner is (100,-100).

objo wrote at 2011-08-22 20:37:

hi NMorgan, I don't quite understand what coordinates you need. Do you need the actual client rectangle of the HelixView control? Did you try

new Rect(VisualOffset.X, VisualOffset.Y, ActualWidth, ActualHeight);

(Temporarily arranging a control to VisualOffset=(0,0) helped me out in another project when I was rendering to a RenderTargetBitmap..)

If you need to project 3D coordinates on the 2D view, see the Helpers/ViewPort3DHelper class.

NMorgan wrote at 2011-08-23 14:49:

Hello, thanks for the reponse what I am looking for a rectangle (or just the coordinates of the points) that represents the area being displayed by the viewport. 

objo wrote at 2011-08-23 15:48:

Still do not understand. The HelixView control displays a 3D frustum (when using a ProjectionCamera).

NMorgan wrote at 2011-08-23 15:50:

I am using a orthographic camera not a projection. Basicly if I wanted to draw a point at the upper right hand corner of the viewpoint how would I go about getting the coordinates of that point.

objo wrote at 2011-08-23 20:24:

try

HelixToolkit.Viewport3DHelper.Point2DtoRay3D(yourViewport, new Point(yourViewport.ActualWidth,0))

I have not tested it, but I think this will work with an orthographic camera. Note that this will give you a ray, you can use the Point2DtoPoint3D method if you want a point at the near or far clip plane.
Petzold's 3D programming book could also be a good source for more solutions to this!  

francolico88 wrote at 2013-04-04 17:06:

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

ftp25 wrote at 2013-05-30 14:11:

objo wrote at 2013-06-08 07:20:

ftp25 wrote at 2013-06-16 21:47:

var g = new Transform3DGroup();
g.Children.Add(rotateTransform);

                     <Transform3DGroup>
                            <RotateTransform3D>
                                <RotateTransform3D.Rotation>
                                    <AxisAngleRotation3D Axis="0,1,0" Angle="{Binding RotationAngle}"/>
                                </RotateTransform3D.Rotation>
                            </RotateTransform3D>
                        </Transform3DGroup>

Ranik wrote at 2014-04-15 12:20:

objo wrote at 2014-04-29 10:27:

alexalthauser wrote at 2012-02-19 00:21:

Hi,

Are the Helix controls meant to show in the toolbox? Mine do not. If they are, which I kind of doubt, but if they are, can somebody plz give me a point in the right direction? I thought they might, since they are referred to as 'custom controls', but I could be mistaken. Either way, it's a really great library.

Thanks!

objo wrote at 2012-02-21 20:45:

are you auto populating the toolbox items? http://karlshifflett.wordpress.com/2009/10/27/new-options-for-visual-studio-2010-beta2-wpf-and-silverlight-projects/

I think it is also possible to right click in the toolbox and "choose items...", but I have not tried myself. All HelixToolkit.Wpf controls are showing up in the toolbox when I open the HelixToolkit solution here.

Rahvil wrote at 2011-09-07 12:13:

Hi again,

Is it possible to set the cameras target point from code. I found target point property from HelixView3D.CameraController.CameraTarget but it's read only. So basically what I would like to achieve from code is the same as double right clicking the model.

Thanks for the help in advance.

objo wrote at 2011-09-07 21:24:

Do you want to change the camera position or the look direction? I think that was the reason I did not add a setter.We could add a setter that changes one of these properties. Also notice that the CameraTarget is a plain property, not a bindable dependency property.

Rahvil wrote at 2011-09-12 10:08:

Thanks for the reply.

I achieved to do what I needed by changing camera position and look direction.

elkhalafy wrote at 2013-06-22 16:30:

elkhalafy wrote at 2013-06-23 15:07:

RobPerkins wrote at 2013-06-24 21:15:

objo wrote at 2013-06-26 21:04:

iLovePasta wrote at 2013-01-18 08:05:

Hi. I've meen trying to dive into Helix Toolkit lately and it seems quite nice. But I realized, that I'm not able to programatically import TubeVisual3D into Viewport even though if I try to import some another Visual3D member (i.e. BillboardTextVisual3D), I have no problem with importing it.

Sample code should look like this:

 TubeVisual3D tube = new TubeVisual3D();
            tube.Path = new Point3DCollection();
            tube.Path.Add(new Point3D(2, 3, 5));
            tube.Path.Add(new Point3D(1, 4, -5));
            tube.Path.Add(new Point3D(1,2,1));
            tube.Diameter = 15;
            tube.ThetaDiv = 15;
            tube.Fill = Brushes.Navy;
            tube.IsPathClosed = true;
            //this adding into children does not work
            MainViewPort.Children.Add(tube);

            BillboardTextVisual3D bt = new BillboardTextVisual3D();
            bt.Text = "RndText";
            Height = 80;
            Width = 250;
            //this adding into children works
            MainViewPort.Children.Add(bt);

 What's wrong with my approach?

edit: solved :)

It's impossible to crete tube points this way.

objo wrote at 2013-01-18 13:06:

try to add the points in a Point3DCollection before setting the tube.Path property. Also, set the tube.Path property after all the other properties (for performance reasons).

noemata wrote at 2010-02-26 16:17:

Though previous releases of Helix 3D build without issue, I was not able to build the most recent archive (41796).

Any suggestions?

Also, I would like to display platonic solids algorithmically ... what approach would be best in the context of your formula based SurfaceDemo.  Ideally, I would like to have parameters control the construction of a given n-level platonic solid (would be cool to be able to show them in a partially unwrapped state).

objo wrote at 2010-02-27 17:47:

I have reverted some of the changes from that changelist, the new version 41967 hould build fine.

I don't think the frame rate calculation is correct - will consider to remove it if it is not possible to get the correct numbers. 

It would be cool to add a demo showing platonic solids - I would create a ModelVisual3D - do it a similar way as the BoxVisual3D. Or just render the edges by a SegmentCollectionVisual3D. Do you have the algorithm calculating the positions of the vertices? I would also like to create a geodesic dome/sphere visual later... :)

noemata wrote at 2010-02-27 19:49:

Great!! Everything builds again.  I think I have the code bits you would need.  How can I send this to you more directly.  Can you provide me with an email address?

Thanks a bunch!

ReedCopsey wrote at 2010-05-14 21:09:

FYI -  The latest build (48034) does not build, due to missing app.config files.

objo wrote at 2010-05-14 22:54:

everytimer wrote at 2014-03-17 23:18:

objo wrote at 2014-04-29 10:55:

everytimer wrote at 2014-04-29 18:15:

alexalthauser wrote at 2012-04-13 03:09:

Hey Guys,

I import a model using the Helix3d toolkit. Next, I perform a hit-test on the 3Dmodel. ThenI get the MeshGeometry3D information from rayMeshResult.Meshit. Finally I get the vertex position information, and triangleIndices from the MeshGeometry3D. Now I clone the points from LinesVisual3D, and then I feed the triangleIndices/vertex info into the clone. Finally, I copy the clone's point data into LinesVisual3D.Points, and add the lines to my viewport.

As you can see from the picture at the link, not all of the edges of the cube are drawn, yet all of the points are there.

http://www.freeimagehosting.net/fhws5

GeometryModel3D hitgeo = rayMeshResult.ModelHit as GeometryModel3D;
                MeshGeometry3D newGeom = rayMeshResult.MeshHit as MeshGeometry3D;
                Point3DCollection srtpnt = modelLines.Points.Clone();

                for (int i = 0; i < newGeom.TriangleIndices.Count; i ++)
                {
                    srtpnt.Add(newGeom.Positions[newGeom.TriangleIndices[i]]);
                    textBlock4.Text += newGeom.Positions[newGeom.TriangleIndices[i]].ToString() + "\n";
                }

                modelLines.Points = srtpnt;
                modelPoints.Points = srtpnt;

                modelPoints.Color = Colors.Red;
                modelPoints.Size = 15;

                modelLines.Thickness = 6;
                modelLines.Color = Colors.Blue;

                MainViewport.ClearChildren();
                MainViewport.Children.Add(modelLines);
                MainViewport.Children.Add(modelPoints);
                UpdateResultInfo(rayMeshResult);
            }

alexalthauser wrote at 2012-04-13 04:20:

I'm going to go out on a limb here and guess that the problem is that I'm calling the geometry information from the Meshhit, instead of from the imported model.

objo wrote at 2012-04-14 00:11:

I think the problem is that you are using the same points for the modelPoints and the modelLines.

The Points collection in the LinesVisual3D defines line segments.

It treats each pair of points as an independent line segment. Vertices 2 n - 1 and 2 n define line n . N / 2 lines are drawn.

alexalthauser wrote at 2012-04-14 00:37:

I understand what you are saying, but whether I use the points for modelPoints, or not, the modelLines, do not fully cover the cube.

alexalthauser wrote at 2012-04-14 02:20:

Ah, nevermind. I understand, it's my bad. Of course a model won't contain information for drawing lines from each vertex, I will have to code a method myself.