Rhino Bug: HiddenLineDrawing.Compute

@Matthieu_from_NAVINN wrote:

Hi,
I’ve got a huge issue with the latest Rhino releases: the result of HiddenLineDrawing.Compute().segments is not computed anymore, or rather the output is missing:

HiddenLineDrawingSegment.parentcurve => nothing
HiddenLineDrawingSegment.geometry => unsolved

It used to work perfectly with rhino 6 SR9, and it fails with SR14 or later releases. I also tried to force compilation with various rhinocommon versions, but it does not change the issue so Rhino itself has most probably something wrong.

Here is a more detailed sample of code, based on @dale exemple:

Dim HLDParam As New Rhino.Geometry.HiddenLineDrawingParameters
            HLDParam.AbsoluteTolerance = doc.ModelAbsoluteTolerance
            HLDParam.Flatten = True
            HLDParam.IncludeHiddenCurves = True
            HLDParam.IncludeTangentEdges = False
            HLDParam.IncludeTangentSeams = False
            HLDParam.AddClippingPlane(New Plane(Plane.WorldZX) With {.OriginY = Y})
            For Each obj In doc.Objects
                HLDParam.AddGeometry(obj.Geometry, obj.Attributes)
            Next
            HLDParam.SetViewport(viewport)
 Dim HLD As HiddenLineDrawing = Rhino.Geometry.HiddenLineDrawing.Compute(HLDParam, False)
If HLD Is Nothing Then Exit Sub
For Each HLD_Segment As HiddenLineDrawingSegment In HLD.Segments
Dim attr As ObjectAttributes = TryCast(HLD_Segment.ParentCurve.SourceObject.Tag, ObjectAttributes).duplicate
Dim c As Curve = HLD_Segment.CurveGeometry.DuplicateCurve()
...
Next

Posts: 1

Participants: 1

Read full topic