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+1

Zoom out

Anonymous 5 years ago 0
This discussion was imported from CodePlex

Cygor6 wrote at 2012-11-23 22:40:

I'm beginners and would need your help! I made a console application 
to save down a rendered image. BUT the camera is too close and
I can not somehow zoom out.






How do I solve this?
using System.IO;
using System.Threading;
using System.Windows;
using System.Windows.Media;
using System.Windows.Media.Media3D;
using System.Windows.Shapes;
using HelixToolkit.Wpf;

namespace ConsoleApplication1
{
    internal class Program
    {             
        public static IHelixViewport3D HelixView { get; set; }
        public static Model3D MyModel { get; set; }

        private static void Main(string[] args)
        {
            var thread = new Thread(Test);
            thread.SetApartmentState(ApartmentState.STA);
            thread.Start();
            thread.Join();
        }

        private static void Test()
        {
            var c = new FileStream("Ferarri40.3ds", FileMode.Open, FileAccess.Read, FileShare.Read);
            var reader = new StudioReader {TexturePath = "."};
            MyModel = reader.Read(c);

            var m = new ModelVisual3D {Content = MyModel};

            const string Path = @"H:\test.png";
            const int Height = 480;
            const int Width = 640;

            var vp = new HelixViewport3D {Width = Width, Height = Height};

            vp.Viewport.Children.Add(m);

            vp.Children.Add(new DefaultLights());

            var zoom = new ScaleTransform3D(1.5, 1.5, 1.5);
            var t = new Transform3DGroup();
            t.Children.Add(zoom);
            vp.Camera.Transform = t;

            vp.Camera = CameraHelper.CreateDefaultCamera();
            vp.Camera.Position = new Point3D(5.300, -12.300, 3.300);
            vp.Camera.LookDirection = new Vector3D(-6.300, 11.000, -6.600);
            vp.Camera.UpDirection = new Vector3D(0.000, 0.000, 1.000);
            vp.Camera.NearPlaneDistance = 0.123;         

            var r = new Rectangle {Width = vp.ActualWidth, Height = vp.ActualHeight};
            var cb = new BitmapCacheBrush(vp) {BitmapCache = new BitmapCache(0)};
            r.Fill = cb;
            r.Arrange(new Rect(0, 0, r.Width, r.Height));
            r.UpdateLayout();            

            vp.Export(Path);
        }       
    }
}
+1

Solved - render a scene with screen space geometry to bitmap

Anonymous 5 years ago 0
This discussion was imported from CodePlex

ezolotko wrote at 2013-08-20 06:21:

In case if anybody will struggle with this - if you are trying to render a viewport to a bitmap without displaying it on screen, and the scene contains some screen space geometry (like LinesVisual3D) - this geometry is absent in the resulting bitmap. This is because CompositionTarget.Rendering event gets never fired in drawing-to-bitmap mode.

This is my dirty as hell solution to this - call this function before your render-to-bitmap code:
        void InvokeRenderingEvent()
        {
            // For those about to hack

            var mediaContextType = typeof(MatrixTransform).Assembly.GetType("System.Windows.Media.MediaContext");

            var fromMethod = mediaContextType.GetMethod("From", BindingFlags.Static | BindingFlags.NonPublic);
            var renderingField = mediaContextType.GetField("Rendering", BindingFlags.Instance | BindingFlags.NonPublic);

            var mediaContext = fromMethod.Invoke(null, new object[] { Dispatcher.CurrentDispatcher });

            var eventDelegate = (MulticastDelegate)renderingField.GetValue(mediaContext);

            if (eventDelegate != null)
            {
                foreach (var handler in eventDelegate.GetInvocationList())
                {
                    handler.Method.Invoke(handler.Target, new object[] { null, EventArgs.Empty });
                }
            }
        }
Hope this will help someone,
Yevgeni.
+1

Is there any thing for moving objects?

Anonymous 5 years ago 0
This discussion was imported from CodePlex

behnam263 wrote at 2014-04-13 09:10:

Hi
I'm looking for a method or a way to move or scale or rotate objects like sphere or cube in 3d view
(not moving or rotating camera or viewport movement). Could you help me to do that?
tnx.

behnam263 wrote at 2014-04-16 23:39:

I found my answer in project examples in source code and manipulation(mainwindow.xaml) which user can move or rotate object and etc by myself :)
+1

Embedded Resources

Anonymous 5 years ago 0
This discussion was imported from CodePlex

qu1ckdry wrote at 2014-03-03 17:25:

Hey!

I've been enjoying the usefulness of this toolkit so far during this project! Now I'm thinking about releasing something and I'd like to embed the model I created. Is it possible to reference an embedded resource? I'd rather not release the .obj file along with my .exe.

I've read this article which uses a file stream to access a resource and I've been able to use it to open an embedded .3ds model, using:
MyModel = reader.Read(Assembly.GetExecutingAssembly().GetManifestResourceStream("HelixCs.e100.3DS"));
However I'm unable to open the texture file in the same way, nor was I able to get it working with .obj.

Any ideas how I can open an embedded model?

Thanks for any help!
+1

Viewport2DVisual3D

Anonymous 5 years ago • updated by parischaikinpllc 3 months ago 4
This discussion was imported from CodePlex

DuaneTNM wrote at 2011-08-25 03:21:

Are there any examples showing Viewport2DVisual3D with HelixView3D.  Can this type of 2D on 3D be achieved with the HelixToolKit.

 

Thanks


objo wrote at 2011-08-25 07:44:

Hi DuaneTNM, sorry there is no example using Viewport2DVisual3D. But I don't think there should be any problem to use it with the controls in HelixToolkit! 


mipa87 wrote at 2011-08-30 17:42:

First, thank you for this project.

How can I use common WPF controls (buttons, sliders) with this toolkit (with supporting button click, slider value changed and etc.)? I'm using Viewport2DVisual3D for this, render is ok, but events are not triggered. What I'm doing wrong?

Thanks

Here is my code:

             <helix:HelixView3D IsHeadLightEnabled="True" ZoomToFitWhenLoaded="True" ShowFrameRate="True" ShowFieldOfView="True" ShowCoordinateSystem="True" MouseDown="HelixView3D_MouseDown" Name="helixView3D" IsHitTestVisible="true">
                <helix:HelixView3D.Camera>
                    <PerspectiveCamera Position="0, 0, 4"/>
                </helix:HelixView3D.Camera>
                <ModelVisual3D>
                    <ModelVisual3D.Content>
                        <Model3DGroup x:Name="group">
                            <DirectionalLight Color="White" Direction="-1, -1, -3" />
                        </Model3DGroup>
                    </ModelVisual3D.Content>
                    <Viewport2DVisual3D>
                        <Viewport2DVisual3D.Geometry>
                            <MeshGeometry3D Positions="-1,1,0 -1,-1,0 1,-1,0 1,1,0"
TextureCoordinates="0,0 0,1 1,1 1,0" TriangleIndices="0 1 2 0 2 3"/>
                        </Viewport2DVisual3D.Geometry>

                        <Viewport2DVisual3D.Material>
                            <DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True" Brush="White"/>
                        </Viewport2DVisual3D.Material>
                        <Viewport2DVisual3D.Visual>

                            <StackPanel Orientation="Vertical">
                                <Button Click="Button_Click">Button</Button>
                                <Slider Value="100" ValueChanged="Slider_ValueChanged" />
                            </StackPanel>
                        </Viewport2DVisual3D.Visual>
                    </Viewport2DVisual3D>
                </ModelVisual3D>
            </helix:HelixView3D>


objo wrote at 2011-08-31 20:36:

I think this is related to issue 8172, and it is not solved yet...

http://helixtoolkit.codeplex.com/workitem/8172


mipa87 wrote at 2011-09-01 00:06:

Thanks for the reply, I solved it with IsViewportHitTestVisible="True"

Here is good article about it: http://msdn.microsoft.com/en-us/library/ms752097.aspx

I have one another question, what's the difference between HelixView3D and ViewPort3DConrtroller?

And here is my working code:

<helix:HelixView3D IsViewportHitTestVisible="True">
	<helix:HelixView3D.Camera>
		<PerspectiveCamera LookDirection="-10,-10,-10" Position="10,10,10" UpDirection="0,0,1"/>
	</helix:HelixView3D.Camera>
	<helix:DefaultLightsVisual3D/>
	<ModelVisual3D>
		<Viewport2DVisual3D >
			<Viewport2DVisual3D.Transform>
				<RotateTransform3D>
					<RotateTransform3D.Rotation>
						<AxisAngleRotation3D x:Name="uiRotate" Angle="40" Axis="0, 1, 0" />
					</RotateTransform3D.Rotation>
				</RotateTransform3D>
			</Viewport2DVisual3D.Transform>
			<Viewport2DVisual3D.Geometry>
				<MeshGeometry3D Positions="-1,1,0 -1,-1,0 1,-1,0 1,1,0"
TextureCoordinates="0,0 0,1 1,1 1,0" TriangleIndices="0 1 2 0 2 3"/>
			</Viewport2DVisual3D.Geometry>
			<Viewport2DVisual3D.Material>
				<DiffuseMaterial Viewport2DVisual3D.IsVisualHostMaterial="True" Brush="White"/>
			</Viewport2DVisual3D.Material>
			<Viewport2DVisual3D.Visual>
				<StackPanel Orientation="Vertical">
					<Button Background="Yellow" Click="Button_Click">Button1</Button>
					<Slider Value="100" ValueChanged="Slider_ValueChanged" />
				</StackPanel>
			</Viewport2DVisual3D.Visual>
		</Viewport2DVisual3D>
	</ModelVisual3D>
</helix:HelixView3D> 

objo wrote at 2011-09-14 09:24:

try the newest version of the library, hopefully the fix on UIElements works.

Note that HelixView3D is renamed to HelixViewport3D and the IsViewportHitTestVisible property is removed.


mipa87 wrote at 2011-09-27 19:33:

Thanks, it works now correctly!

+1

Help required in opennig a 3D model (.ply) using FileModelVisual3D in WPF

Anonymous 5 years ago 0
This discussion was imported from CodePlex

pyrrhicpk wrote at 2012-09-24 03:38:

Hi,

I have just started using HelixToolkit and trying to load a 3D model (.ply) in my WPF application using FileModelVisual3D with the following code:

 

FileModelVisual3D scan = new FileModelVisual3D();
scan.Source = "C:\\box.3ds";
       
myview.Children.Add(scan); //myview is my HelixViewport3D
this.Content = myview;

Running the above code does not show the model. Any suggestions?

Thanks

+1

MVVM with background work

Anonymous 5 years ago 0
This discussion was imported from CodePlex

g_todeschini wrote at 2013-08-13 17:41:

I'm trying to create a WPF application using the MVVM pattern.
In my view (UserControl class derived) I've placed the HelixViewport3D control and I've assigned an instance of my ViewModel to the DataContext property

<h:HelixViewport3D RotateGesture="Alt+RightClick" PanGesture="RightClick">
<h:HelixViewport3D.Camera>
<OrthographicCamera Position="80.22,0,0" LookDirection="-80.22,0,0" UpDirection="0,0,1" Width="56"/>
</h:HelixViewport3D.Camera>
<h:SunLight />
<ModelVisual3D Content="{Binding Model3D}" />
</h:HelixViewport3D>

The ModelVisual3D content property is binded with the Model3D propery of my ViewModel.

All works fine but I would like to create the model in a function that works in background. I've tried to do this using both the BackgroundWorker class that the Task.Factory.StartNew but I've always get the message that the object is property of another thread.

One of my attempt is the following

public class MyViewModel : BaseViewModel
{
private MyData _model; // the data on which to generate my 3d model
private Model3DGroup _model3d;
private CancellationTokenSource _source;

public Model3DGroup Model3D
{
    get { return _model3d; }
    set
    {
        if (_model3d != value)
        {
            _model3d = value;
             RaisePropertyChanged(() => Model3D);
        }
    }
}

private void CreateModel3D(object dispatcherObject)
{
    Dispatcher dispatcher = (Dispatcher)dispatcherObject;

    Material nodesMaterial = MaterialHelper.CreateMaterial(Colors.Green);
    double size = Math.Max(_model.Limits.Width, _model.Limits.Height);
    double dn = size / 100;
    double db = size / 120;
    int thetaDiv = 10;

    foreach (Strauss.Node node in _model.Nodes)
    {
         MeshBuilder meshBuilder = new MeshBuilder(false, false);
         meshBuilder.AddSphere(new Point3D(node.X, node.Y, node.Z), dn, thetaDiv, thetaDiv / 2);
         MeshGeometry3D mesh = meshBuilder.ToMesh(true);
         dispatcher.Invoke((Action)(() => _model3d.Children.Add(new GeometryModel3D { Geometry = mesh, Material = nodesMaterial, BackMaterial = nodesMaterial })));
    }
}

private void ModelLoaded(object sender, EventArgs args)
{
    System.Windows.Window win = App.Current.Windows[0];
    DocManagerViewModel docManager = win.DataContext as DocManagerViewModel;
    _source = new CancellationTokenSource();
    Task task = Task.Factory.StartNew(CreateModel3D, _model3d.Dispatcher, _source.Token);
}
}

The process starts from the ModelLoaded event handler.

Can anyone please help me?
Thanks in advance.

RobPerkins wrote at 2013-08-14 18:02:

1 -- Use Task.Factory.StartNew(). BackgroundWorker is prone to a race condition.
2 -- All WPF objects, including GeometryModel3D and MeshGeometry3D, have to be "Frozen" to be passed between threads. See "Freezable" in the MSDN documentation.

Change the code in CreateModel3D from what you have to something like:
var gm3d = new GeometryModel3D { Geometry = mesh, Material = nodesMaterial, BackMaterial = nodesMaterial };
dispatcher.Invoke((Action)(() => _model3d.Children.Add(gm3d.GetAsFrozen())));
+1

Event that fires when the camera stops moving

Anonymous 5 years ago 0
This discussion was imported from CodePlex

everytimer wrote at 2014-07-31 21:24:

I need to perform an operation right after the user has stopped moving the camera (everytime he does it).

I'm doing it now by subscribing to every MouseEvent that allows interaction with the camera (specifically ButtonUp). The problem is that when the user has zoomed I don't have a way to know when he has stopped zooming. Other issue of capturing mouse events is that when the camera change has been generated programatically (set some saved view, etc) and there is some animation I can't do it either.

I would like to know if there is some event that I can subscribe to know when the Camera is "done", when it has stopped moving.

If such event doesn't exist I would like to know if it is possible to create one without modifying the source code of HelixToolKit and how it could be done.

Thank you very much.
0

Animating Helix Tookit TORUS Example

ikonuk 4 months ago • updated by kitchenprovance 3 months ago 2

Dear Friends:

I am slowly getting used to WPF and Helix Toolkit. I really, really like Helix. Although I am a slow learner (retired from academia some years ago), I made great progress. I have recreated several of the Helix examples to learn main features steps by step. I think I have learned everything I need except how to do animation.

By animation, I mean the following. I will draw and texture a deformed pipe based on some numerical computations. I would like draw deformed shape in steps as the pipe bends based on results at each time step.

I am starting first by simulating this process by using a WPF slider control. I am trying to move the object(s) at each (integer) step of slider. I am now trying to achieve this by moving the torus objects (from torus example). I have added a new “Translation” property to MainWindow. I connected this property to a slider. The binding works as I tested it with both a message box and TextBlock display (the code I am posting). I can see that text block contents change and when I enable the MessageBox I can see that “RaiseTranslationChanged” method is activated therefore “trans” variable is updated. Integer “trans” variable is supposed to be use to translate the two torus objects on each side. Unfortunately torus objects do not move.

I suspect that this may be related to “viewmodel” or “dependencyproperty” or both as I can see tube diameter binds quite nicely to the slider. I have a rudimentary understanding of windows messaging system and WPF “datacontext” but I do not seem to understand how they all interact. I would greatly appreciate it if someone could post a solution to this problem and also how I can animate the translation of torus objects in a loop with relatively simple explanation.

Any help would be greatly appreciated. I will also share what I produce at the end and share any credits with anybody who provides input. I am posting both the modified cs and xalm files.

i.konuk




mainwindow.xaml


MainWindow.xaml.cs

0

Click to select the model

Smile 5 months ago 0
  • 我使用以下代码导入了多个模型


Microsoft.Win32.OpenFileDialog对话框=

新的Microsoft.Win32.OpenFileDialog();

dialog.Filter =“3dFile | * .obj”;

if(dialog.ShowDialog()== true && System.IO.File.Exists(dialog.FileName))

{

ObjReader CurrentHelixObjReader = new ObjReader();

Model3DGroup MyModel = CurrentHelixObjReader.Read(dialog.FileName);

ModelVisual3D model = new ModelVisual3D();

model.Content = MyModel;

View3D.Children.Add(模型);

MessageBox.Show( “成功!”);

}


但是,如何通过单击鼠标选择模型并移动它

Media3D WPF