Hi,

Im looking to take a snap shot of whats in the helix HelixViewport3D control by clicking a button. Has anyone done this before? Any advice appreciated!

Thanks!

something like this should do the work (helix is your HelixViewport3D):


Bitmap RenderBitmapAndSaveToFile(int width, string fileName)
{
double scale = width / helix.ActualWidth;

int height = (int)(helix.ActualHeight * scale);

RenderTargetBitmap bmp = new RenderTargetBitmap( width, height, 96 * scale, 96 * scale, PixelFormats.Pbgra32);

// draw the bitmap Background
Rectangle vRect = new Rectangle();
vRect.Width = bmp.Width;
vRect.Height = bmp.Height;
vRect.Fill = helix.Background;
vRect.Arrange(new Rect(0, 0, vRect.Width, vRect.Height));
bmp.Render(vRect);

bmp.Render(helix.Viewport);

PngBitmapEncoder aEncoder = new PngBitmapEncoder();
aEncoder.Frames.Add(BitmapFrame.Create(bmp));

Directory.CreateDirectory(System.IO.Path.GetDirectoryName(fileName));

using (Stream stm = File.Create(fileName))
{

aEncoder.Save(stm);

}
}

regads,
Joachim

I would like to have a context menu to pop up when I right click on an object.
Two questions:
1) does Helix have any functions to create menus?
2) right click seems to control the camera, is there a way to override that? or switch camera control to a combination of left and right click buttons together?

I don't know it Helix has GUI functions - although you could just pop a menu by the cursor using system API.
About how to control the camera, you can select which button (gesture) does what like this for example:

v3d.RotateGesture = new System.Windows.Input.MouseGesture(MouseAction.LeftClick);

where v3d is HelixViewport3D type.

1) Use a standard WPF ContextMenu
2) Yes, change the gesture as AnotherBor suggests

Thank you!

Hello everyone,
i know that this has been a solved issue, but i cannot get out of this mess.
I have tried all the possibilities that i found over internet, but i cannot figure out why some objects are loaded well and some others not. I tried three different ways...I post some code:

FileModelVisual3D Mymodel= new FileModelVisual3D();
Mymodel.source = MODELS[i]; //where MODELS[i] is a string with the path of the model, let's //say C:/fish.obj
view1.Children.Add(Mymodel);//where view1 is my helixviewport3d

so i try:

Model3DGroup modelGroup = ModelImporter.Load(MODELS[i]);
GeometryModel3D Mymodel = (GeometryModel3D)modelGroup.Children[0];
newVisual = new ModelVisual3D { Content = MyModel }; //or Content = modelGroup;
view1.Children.Add(newVisual);//where view1 is my helixviewport3d

then i try:

var reader = new StudioReader();
Model3D MyModel = reader.Read(path); //where path is the object path
newVisual = new ModelVisual3D { Content = MyModel };
view1.Children.Add(newVisual);//where view1 is my helixviewport3d

i tried also:

ObjReader reader2 = new ObjReader();
Model3DGroup modelGroup = reader2.Read(MODELS[i]);
GeometryModel3D _objRead = (GeometryModel3D)modelGroup.Children[0];
newVisual = new ModelVisual3D { Content = _objRead};
view1.Children.Add(newVisual);//where view1 is my helixviewport3d

and obviously i'have tried also the loading directly from xaml, without any significant results :(
also i tried what have been described here https://helixtoolkit.codeplex.com/discussions/354077, meaning the loading from stream, but without any success...

No one of this method is working for me :( i cannot see well all the models that i find both in the helix samples both on internet. The best result that i've obtained, till now, is with the use of the second method (create a ModelGroup3D and show it through the use of a ModelVisual3D, that will be the helixViewPort children...

Can someone told me what i'm doing wrong? Could someone give me a piece of code that is actually working? because i've searched over the internet and all i read is that everyone could get this fantastic tool to work but me :'(

have a nice day and thanks in advance...:)

Do you have lights in your scene? I think your code using ModelVisual3D looks ok.
I recommend setting a breakpoint on line 527 in StudioReader.cs, then you can check if the texture is loaded correctly!
Textures are not supported when loading from a stream.

Hi,

Instead of using the mouse to rotate around an object I want to use some buttons.

is it the AddRotateForce method I should use to do this where x and y would be the coordinate in world around the object?

Thanks
Seb

No, the arguments are relative to the screen coordinate system. See the usage by the arrow keys!

I have moved my project from helixtoolkit to helixtoolkit.wpf and found some difference with drag & drop behaviour. When dragging over HelixViewport3D and its children (i.e. some 3D models in it) I'm getting a lot of DragEnter/DragLeave events. Both events are connected to HelixViewport3D (new version) and HelixView3D (old version).

I am not aware of any changes related to drag/drop in the HelixViewport3D control.
Can you reproduce the behaviour in a small example?



        <h:HelixViewport3D x:Name="view1" CameraRotationMode="Turntable" IsHeadLightEnabled="True">
            
            <h:HelixViewport3D.Camera>
                <PerspectiveCamera Position="0, -200, 0"  LookDirection="0, 200, 0" FieldOfView="45" UpDirection="0,0,1">
                    <PerspectiveCamera.Transform>
                        <Transform3DGroup>
                            <TranslateTransform3D x:Name="cameraTranslateTransform3D"></TranslateTransform3D>
                        </Transform3DGroup>
                    </PerspectiveCamera.Transform>
                </PerspectiveCamera>
            </h:HelixViewport3D.Camera>
        </h:HelixViewport3D>

then some binding in code since my objects are runtime:

            Binding aBinding = new Binding("OffsetX");
            aBinding.Source = tryMe.outerCasePosition;
            BindingOperations.SetBinding(cameraTranslateTransform3D, TranslateTransform3D.OffsetXProperty, aBinding);

I don't find any documentation for "Hello World" demo application , many good comments but 0 documentation , how I start ?

Sorry, there is no "getting started" documentation yet. But there is a lot of examples, see the source code. Also, all properties and methods should be covered by XML comments.

I'm looking at implementing an Exporter that can write 'named layers' (aka 'groups' ) that are defined when the model is created.

At the moment, I'm not entirely sure where to start.

Our code is creating objects using ExtrudedVisual3d and QuadVisual3d which end up as direct children of the viewport.

I was thinking I could create a nested structure of ModelVisual3d elements under the viewport, each of which contains a set of children which make up that layer. But this wouldn't know about the 'name' of that layer.

Similarly, when exporting the decendant exporter class is not called until the base class has traversed down to the Geometry3dModel, at which point it's unaware of the ModelVisual3d which it belongs to.

The obj exporter is the only exporter that I can see which exports groups, but it creates a new group for each GeometryModel3d, which is not what I want in this case.

Should I be looking at Dependency Properties/Attached Properties to achieve this? But where to put them?

Clues? Suggestions?

Yes, attached properties can be used to set the name of the groups. We could add this property into the library and implement support for it in the exporters. I understand the obj exporter also need some refactoring related to the grouping.

https://helixtoolkit.codeplex.com/workitem/9994