Describing the viewport boundary as a rectangle in 3d space

Replies to This Discussion

Permalink Reply by David Rutten on August 13, 2010 at 3:00am

Hi Jon,

yes, this is possible. Are you using RhinoCommon or the RhinoDotNET SDK?

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by David Rutten on August 13, 2010 at 3:33am

Private Sub RunScript(ByVal vp As String, ByRef A As Object)
   Dim view As Rhino.Display.RhinoView = doc.Views.Find(vp, True)
   If (view Is Nothing) Then
     Throw New Exception("View " & vp & " does not exist")
   End If

   Dim pts As Point3d() = view.MainViewport.GetNearRect()
   If (pts Is Nothing) Then
     Throw New Exception("View " & vp & " is not valid")
   End If

   Dim rec As New Polyline()
   rec.Add(pts(0))
   rec.Add(pts(1))
   rec.Add(pts(3))
   rec.Add(pts(2))
   rec.Add(pts(0))

   A = rec
End Sub

Of course this won't update whenever the view changes. In order to create a proper 'heads-up' display like this you need to define your own Display Conduit and handle each and every redraw yourself.

--
David Rutten
david@mcneel.com
Poprad, Slovakia

Permalink Reply by Jon Sargent on August 18, 2010 at 4:59pm

Very cool. Thanks, David.

Creating a display conduit might be over my head, but this will do the trick for now.

-Jon

Permalink Reply by ememery on December 23, 2010 at 8:43pm

Hi,David, Thanks for your reply ,But I have another question,would you please tell me what's wrong?

 

you defined the new rectangle As a   PolyLine   (i.e.  Dim rec As New Polyline())

 

But I defined the rectangle as a Rectangle.what's the difference between them?

there is no wrong message when the grasshopper VB runs,but As long As assigned the rectangle to the output, i cannot find it in the viewport anywhere.

 

what's wrong with that?

 

 

    Dim w ,h As Double

    w = ptA.DistanceTo(ptB)

    h = ptA.DistanceTo(ptD)

    Dim Rtg As New rectangle3d(plane.WorldXY, w, h)

    Dim v As New Vector3d((PtA.X - Rtg.Corner(0).X), (PtA.Y - Rtg.Corner(0).Y), (PtA.Z - Rtg.Corner(0).Z))

    Rtg.Transform(Transform.Translation(v))

 

    A = Rtg

Permalink Reply by Ramon Jesus Gonzalez-Marquez on May 13, 2011 at 3:49pm

Hi David! Is there any place where is explained how to use the Display Conduit. I found this page on the wiki (http://wiki.mcneel.com/developer/displayconduit) but I do not have clear what to do once I have my own class. I bet I need to register it in some way, but how?

 

Could you put some on light on these? Thanks in advance.

Permalink Reply by Ramon Jesus Gonzalez-Marquez on May 16, 2011 at 1:39pm

Already solved!!! As easy as register the correct events ..... 

 

This network is a real treasure. Tons of pieces of info spreaded all around that at the end of a couple of days reading become a solution to the problem.....

 

My HUD display is now almost working....

Permalink Reply by kleerkoat on May 18, 2011 at 6:40pm

would you be willing to share your work on a HUD display, it sounds extremely interesting!  thank you!

Permalink Reply by Johann Magnus Kjartansson on April 14, 2012 at 11:45am

I get an error when I try to run the script, both in Rhino and Grasshopper.

I want to use this to be able to render a view, then make2d and place the vector lines over the rendered image, having the viewport boundary as vectore lines would really speed up the process of placing the lines correctly. For some reason make2d doesn't offer to draw the viewport border, like "export to illustrator" does. I would just use export to illustrator if it had a "hidden line" option. You can't have it all! :P