In my WPF application I want to add multiple 3D objects from xaml files. But if more objects I'm having in viewport3D performance of my application becomes worse with every object I add.
As I can only work with only one 3D object at the same time I thought that maybe I can replace 3D objects that I'm not using with their images and when I try to interact with some of these unused objects image is replaced back with its original 3D object.
Any suggestions on how I can get this bitmap from 3D object?
Do you need to be able to do it dynamically? If not, you can render the object, take a screenshot and then save the relevant part as a bitmap.
If you do need to be able to do it dynamically, you can render the 3D object once and the save the view as a RenderTargetBitmap and then use that in future. E.g. http://www.codeproject.com/Articles/103184/How-to-Render-Bitmap-or-to-Print-a-Visual-in-WPF.aspx
In either case, the bitmap can then be applied to a simple square as a texture.
Related
As you can see in the link, I have two elements: first is image element which is taken from camera (using EmguCV) and the other one is viewport3d which renders 3d object. I also include 2d object (see the rectangle).
When I run my program I see this.
Yes indeed, the object (hand) will be ordered in front of the image.
The question is how to order 2d/3d object behind the hand object? Is it possible to do it using single camera? Just like this one.
Thanks in advance for your answers.
There are two ways of doing it.
Use kinect depth map to find the distance of hand from camera.
Do image processing to detect hand and it's distance.
I think it will be difficult to directly blend WPF UI with camera image.
Try RenderTargetBitmap
http://msdn.microsoft.com/en-us/library/system.windows.media.imaging.rendertargetbitmap.aspx
I am working on a Chart Control,
I need to implement the Chart Snapshot feature for capturing a vector based image in high quality of Curves and Texts, in any requested size.
Can anyone suggest me any solution or a pointer to resolve this problem.
Any kind of help in deeply appreciated.
If you have to save your image in a vector format you can using tracing. Potrace is an open source bitmap-to-vector tracer library (but considers that bitmap tracing is imperfect). Also considers that wpf is linked closely with XAML, a vector graphics markup languages, so you may want convert raster graphics to XAML (though Charles Petzold you can't embed a bitmap in a XAML file)
If you need to draw a vector image you can use the Shape element that provides a base class for shape elements, such as Ellipse, Polygon, and Rectangle; and add the shape as Panel child. If you are dealing with thousands of shape I suggest to use the DrawingVisual class, a visual object that can be used to render vector graphics on the screen, and its RenderOpen method.
To zoom you have to work with transformations, in particular ScaleTrasnform and apply the transformation to your panel or to your shapes.
Hope this help.
You can take a look at XamlToy but I have not already try it.
http://xamltoys.codeplex.com/
I have a Viewport3D object containing a scene of hierarchical Model3D objects (grouped in Model3DGroups).
I need to "attach" 2D objects to 3D elements in the scene.
I read some articles on 3D projection but I couldn't fully understand how to apply my WPF scene data to those solutions.
What is the proper way to do that? I also tried Petzold.Media3D library but I didn't understand how to use it...
Thanks
I think you are looking for the Viewport2DVisual3D class. It allows you to render any Visual2D into the 3D space.
Searching the web for more info on this class will give you examples and videos explaining how it works.
Anyway, if you are doing any WPF 3D you also need to know about the Helix Toolkit - an awesome (free) WPF 3D toolkit.
It has two classes added recently that might also be relevant to what you are doing:
BillboardVisual3D (quad that always faces camera) and
TextBillboardVisual3D (text that always faces camera).
There are useful if you want to make some 2D image that must always face towards the 3D camera.
There are several tutorials that show you how to create 3d objects such as thisIntroduction to WPF 3D. Moreover I could create the 3d objects in other applications and then import them with expression blend.
If my 3d object is a cube for example how could I place a user control in one of the faces of the cube? When I imported my 3d object to my application expression blend created a viewport control. I was wondering if it is possible to place a control inside that object such as a button. I have tried placing the button inside that viewport and it does not work. Is it possible to place a user control inside a 3d object?
You can use Viewport2dVisual3d class.
This class allows live interactive 2D content to be directly mapped to a 3D surface.
You should break the mesh up to have a separate mesh for each face then use a Viewport2dVisual3d for each face and add your control to that face.
i was learning 3d animation in wpf.. and most tutorials would make an image 3d then play with it alittle ..moving and changing dimensions..
so it got me wondering.. is it possible to add some type of data container (like a grid canvas.. or whatever).. and make it move in 3d dimensons too ?
i am not talking about skewing.. i am talking about real 3d movement..
What a lot of examples do in .Net3.0 is use visual brush to draw the visual of the control/data container on a surface in 3D space. And then map the mouse and keyboard events back to the 2D control (through a translation).
They are a lot of examples that illustrate this. (one for instance is)
An alternative is to use a panel that layouts your control in 3D space using one of the thriple opensource project Or you could read the code (since it's opensource) as a starting point.