Baking

Hi,

What is the necessary inputs to bake an object to the current document?

If I understand this correctly, we

1. Cast a geometry to the GH type

2. Use the xxx.BakeGeometry method to bake it to the current open file

What settings do we need to assign to CurrentDoc and CurrentAtt? Do these automatically default to something workable?

Dim TestLine As New GH_Line

TestLine.CastFrom(LineList.Item(0))

Dim IsTestLineValid As Boolean = TestLine.IsValid

Dim CurrentDoc As Rhino.RhinoDoc

Dim CurrentAtt As Rhino.DocObjects.ObjectAttributes

Dim ObjectID As New System.Guid

CurrentAtt.LayerIndex = 0

TestLine.BakeGeometry(CurrentDoc, CurrentAtt, ObjectID)

Thanks.

kermin

Replies to This Discussion

Permalink Reply by David Rutten on August 19, 2010 at 2:31pm

Hi Kermin,

you don't technically need to supply the Attributes, though I'd recommend you cook up some defaults.

And you don't have to use the Grasshopper methods to add objects to the document, you can also call RhinoDoc.Objects.AddXXXX() methods. This may be much simpler if you know what kind of geometry you're dealing with (curves, say, or meshes, instead of just some form of geometry.)

One important thing to realize is that GH_Goo (or IGH_Goo, or IGH_GeometricGoo) do not provide the methods for baking. BakeGeometry() is defined in the IGH_BakeAwareData interface (indeed, this interface defines nothing else), but a lot of classes that implement IGH_Goo also implement IGH_BakeAwareData.

Thus if you have an instance of IGH_Goo or IGH_GeometricGoo you still won't be able to bake it until you cast it to IGH_BakeAwareData.

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

Permalink Reply by Benjamin Golder on October 19, 2010 at 4:52am

Could anyone show just a very brief code example of casting IGH_Goo or IGH_GeometricGoo to IGH_BakeAwareData?

thanks!

Permalink Reply by Giulio Piacentino on October 19, 2010 at 5:14am

Hi Benjamin,

using TryCast (also DirectCast will be ok here):

Dim att As New Rhino.DocObjects.ObjectAttributes 'from somewhere



If TypeOf x Is IGH_BakeAwareData Then

  Dim g As New Guid

  Dim bk As IGH_BakeAwareData = TryCast(x, IGH_BakeAwareData)

  If(bk.BakeGeometry(doc, att, g)) Then

    Print("Baking succeeded")

  End If

End If

- Giulio
________________
giulio@mcneel.com
McNeel Europe, Barcelona

Permalink Reply by Benjamin Golder on October 19, 2010 at 5:21am

Thanks Giulio!
So in this case x is IGH_GeometricGoo, and
If TypeOf x Is IGH_BakeAwareData Then
checks if the geometry being handled is a type that inherits from IGH_BakeAwareData?

Permalink Reply by Giulio Piacentino on October 19, 2010 at 5:49am

Yes, you cannot bake a number.

- Giulio
________________
giulio@mcneel.com
McNeel Europe, Barcelona

Permalink Reply by Benjamin Golder on October 19, 2010 at 6:26am

... unless it is pi
:)

Permalink Reply by David Rutten on October 19, 2010 at 7:35am

Made my day.

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

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