[Radu Iordanescu]

Hello,

Is there a simple point element? (Or a workaround)

It should have a position, a colour and a size, but the size should remain constant while zooming.
And it should require the minimum amount of computer resources if possible. 

Thanks,

[abenedik]

WPF 3D engine does not support 3D pixels. You could "fake" it with using a 3D plane (PlaneVisual3D) that would be always oriented to face the camera (PlaneVisual3D has a AlignWithCamera method) and adjust its size when the camera changes (to get the desired 3D size you can use the Ab3d.Utilities.CameraUtils.GetPerspectiveWorldSize method).

But this will work for showing only a limited number of pixels because the performance will not be good.

If you want to show many 3D points then you should use Ab3d.DXEngine (https://www.ab4d.com/DXEngine.aspx). It supports hardware rendering of pixels and with using a decent graphics card it can render hundreds of millions of pixels. See the samples project that comes with Ab3d.DXEngine library.

Here you can see two screenshots:
https://www.ab4d.com/images/DXEngineGall...Engine.png
https://www.ab4d.com/images/DXEngineGall...ptions.png

[Radu Iordanescu]

Thanks,

This is really helpful.

But, can you elaborate a little more on how to get a 3D object to be of constant size?

[abenedik]

If you will search for the "GetPerspectiveWorldSize" in the Ab3d.PowerToys samples project you will find that this method is used in the "Use Cases / Billboards sample" - see the code comments in the Camera1OnCameraChanged method.