RedrawEnabled()

Replies to This Discussion

Permalink Reply by David Rutten on July 16, 2011 at 8:18pm

Hi Yiannis,

 

this is now a static (Shared in VB) property on the RhinoView class.

 

Rhino.Display.RhinoView.EnableDrawing

 

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David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Yannis on July 17, 2011 at 5:04am

Hi David,

 

I should actually have clarified it better, I meant the GH_Canvas.RedrawEnabled() property, this is what I seem to be missing.. sorry bout that.

 

Thanks again.

 

Cheers,

Yiannis

Permalink Reply by David Rutten on July 17, 2011 at 12:09pm

That is gone. May I ask why you are looking for this? Do you want to hide certain operations or are you worried about performance?

 

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David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Yannis on July 17, 2011 at 12:41pm

Hi David,

 

Performance is my main concern. Doing a continuous update with the redraw disabled gave a huge performance boost at least in 8.0004 where I was testing..

 

Any tips for the current version?

 

Thanks.

 

Yiannis

Permalink Reply by Yannis on August 31, 2011 at 4:42am

Just tested 8.0051, performs much better. Thanks for that, although somehow reinstating enabling/disabling canvas redraw would be smashing!

Permalink Reply by David Rutten on August 31, 2011 at 11:54am

This is no longer possible as I changed the way the canvas redraws itself and it now no longer has a secondary image buffer that can be 'kept-alive'.

 

There's now two ways to trigger canvas updates (the same as with all Windows.Forms controls), you can either call Invalidate() or Refresh(). Invalidate will expire the canvas and it will be redrawn whenever the processor falls silent. This means you can invalidate the canvas a lot of times from within a tight loop and it won't affect performance. Refresh will immediately repaint the canvas, taking a hefty performance toll but it doesn't look as though the program stopped responding.

 

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David Rutten

david@mcneel.com

Poprad, Slovakia