topic Re: Draw/Render over the ActiveView in Revit API Forum

Draw/Render over the ActiveView

rossen.hristov — Wed, 10 May 2017 13:30:00 GMT

Hello,

Is there a way to draw an image over the ActiveView. I am trying to achieve the same look and feel as the one that you get when you go to View->Render and hit the Render button. The image will be produced by a third-party renderer but I can't find a way to draw this image over the current ActiveView.

Any ideas?

Re: Draw/Render over the ActiveView

jeremytammik — Wed, 10 May 2017 14:25:42 GMT

Yes, sure.

Check out DirectContext3D:

http://thebuildingcoder.typepad.com/blog/2017/04/whats-new-in-the-revit-2018-api.html#3.26

Cheers,

Jeremy

Re: Draw/Render over the ActiveView

rossen.hristov — Wed, 10 May 2017 15:01:21 GMT

Thank you. I will check it out right away.

Re: Draw/Render over the ActiveView

rossen.hristov — Thu, 11 May 2017 09:06:36 GMT

I looked around the DirectContext3D namespace, IDirectContext3DServer and DrawContext, but this is not what I am looking for.

Maybe I did not ask my question correctly.

I don't want to supply Revit with vertices and indices and let it draw them.

What I am looking for is to replace the image generated by Revit after the user clicks the "Render" button with my own image. Revit should not render anything -- V-Ray will do this job and will provide the rendered image. For example every other second.

I have attached a screenshot.

Thanks.

Re: Draw/Render over the ActiveView

jeremytammik — Mon, 15 May 2017 15:03:44 GMT

I do not think Revit supports this out of the box.

On the other hand, I do think that other developers have achieved similar effects.

Maybe they use the Windows API to do so?

Re: Draw/Render over the ActiveView

rossen.hristov — Tue, 16 May 2017 06:49:53 GMT

Thank you for the information.

Is there an example of implementing the DirectContext3D.IDirectContext3DServer interface and using DrawContext.FlushBuffer? I browsed Revit 2018 SDK Samples, but could not find one. Google does not return anything either.

Re: Draw/Render over the ActiveView

jeremytammik — Tue, 16 May 2017 20:53:18 GMT

Dear Rossen,

I am checking with the development team for you.

Cheers,

Jeremy.

Re: Draw/Render over the ActiveView

jeremytammik — Thu, 18 May 2017 21:21:49 GMT

Dear Rossen,

I am attaching the DuplicateGraphics SDK sample to this message.

It was not published with the Revit 2018 RTS SDK for technical reasons.

I hope it provides all you need to understand how to work with DirectContext3D.

Have fun!

Cheers,

Jeremy.

Re: Draw/Render over the ActiveView

rossen.hristov — Mon, 22 May 2017 08:03:25 GMT

Thank you, Jeremy!

I will check it out.

Re: Draw/Render over the ActiveView

jeremytammik — Tue, 23 May 2017 12:24:24 GMT

Thank you for your appreciation.

Please let us know how you end up making use of it.

Thank you!

Cheers,

jeremy

Re: Draw/Render over the ActiveView

rossen.hristov — Tue, 23 May 2017 12:32:54 GMT

Hello,

I managed to run the sample and make a wall appear twice 😉 Now I need to find a clever and efficient way to draw an image bitmap pixel by pixel using DrawContenxt.FlushBuffe. The thing is, we want to render a bitmap image rendered by V-Ray over the Revit view and not create vector graphics.

Best Regards,

Rossen

Re: Draw/Render over the ActiveView

jeremytammik — Tue, 23 May 2017 14:11:41 GMT

Published on The Building Coder now as well:

http://thebuildingcoder.typepad.com/blog/2017/05/revit-2017-and-2018-sdk-samples.html

Cheers,

Jeremy

Re: Draw/Render over the ActiveView

michael-coffey — Tue, 23 Nov 2021 16:23:36 GMT

How did you get it to run? It doesn't seem to do anything for me. I pick a wall and nothing happens. Looking at the code, there appears to be a few methods that aren't hooked up. When I tried adding one of them into the command run, I get an error in Revit.