changing objects to polylines

[Anonymous]

Hello,

I am new at autocad macros (3-4 days so far, but have worked with VBA in EXCEL), so any help will be greatly apreciated.  I have a VBA macro that creates a shape, made out of 2 lines and 2 arcs (all joined).  I need to convert the final product to a joined polyline, using VBA.  I know normally it may be easier to draw it as a polyline but I do not have the cordinates of all the end points since I have used rotations.  How can I take the 4 segments and conect them.  (if it helps the 4 items will always be the last 4 items created and always at relatively the same spot (relative to variables)).  Here is the code I am using to make the shape.

'make variables
Dim UnDataOD As Variant
Dim UnDataID As Variant

Dim NCycles As Double
Dim LDRatio As Double

'make variable for origin

Dim Origin(0 To 2) As Double
Origin(0) = 0
Origin(1) = 0
Origin(2) = 0

'create line for data line
Dim LineStart(0 To 2) As Double 'create startpoint
LineStart(0) = 0
LineStart(1) = (DataID / 2)
LineStart(2) = 0

Dim LineEnd(0 To 2) As Double 'create endpoint
LineEnd(0) = 0
LineEnd(1) = (DataOD / 2)
LineEnd(2) = 0

Dim LineObj As AcadLine

Set LineObj = ThisDrawing.ModelSpace.AddLine(LineStart, LineEnd) 'draw line

'rotate/mirror line for data line

Dim RotAngle As Double
Dim Pi As Double
Pi = 4 * Atn(1)
RotAngle = LDRatio / (NCycles * Pi) 'calculate the rotation angle in radians
LineObj.Rotate Origin, RotAngle 'rotate line
LineObj.Update 'draws it on screen
LineObj.Mirror Origin, LineEnd 'mirror the line
LineObj.Update

'create arcs for data line

Dim ArcObj As AcadArc

Set ArcObj = ThisDrawing.ModelSpace.AddArc(Origin, (DataOD / 2), (Pi / 2 - RotAngle), (Pi / 2 + RotAngle))
ArcObj.Update
Set ArcObj = ThisDrawing.ModelSpace.AddArc(Origin, (DataID / 2), (Pi / 2 - RotAngle), (Pi / 2 + RotAngle))
ArcObj.Update

[Anonymous · Accepted solution]

I was able to solve the problem, it was easier to redraw the thing from scratch as a closed polyline.  In case it helps any one here is the code i ended up using:

'start declaring points
Dim DataObjPoi(0 To 14) As Double
DataObjPoi(0) = (DataID / 2) * Cos((LDRatio * Pi) / NCycles)
DataObjPoi(1) = (DataID / 2) * Sin((LDRatio * Pi) / NCycles)
DataObjPoi(2) = 0
DataObjPoi(3) = (DataID / 2) * Cos((-LDRatio * Pi) / NCycles)
DataObjPoi(4) = (DataID / 2) * Sin((-LDRatio * Pi) / NCycles)
DataObjPoi(5) = 0
DataObjPoi(6) = (DataOD / 2) * Cos((-LDRatio * Pi) / NCycles)
DataObjPoi(7) = (DataOD / 2) * Sin((-LDRatio * Pi) / NCycles)
DataObjPoi(8) = 0
DataObjPoi(9) = (DataOD / 2) * Cos((LDRatio * Pi) / NCycles)
DataObjPoi(10) = (DataOD / 2) * Sin((LDRatio * Pi) / NCycles)
DataObjPoi(11) = 0
DataObjPoi(12) = (DataID / 2) * Cos((LDRatio * Pi) / NCycles)
DataObjPoi(13) = (DataID / 2) * Sin((LDRatio * Pi) / NCycles)
DataObjPoi(14) = 0

Dim Bulge As Double 'calculate the bulge of the arcs
Bulge = Tan((LDRatio * Pi) / (2 * NCycles))
Dim DataObjPoly As AcadPolyline
Set DataObjPoly = ThisDrawing.ModelSpace.AddPolyline(DataObjPoi) 'create the polyline
DataObjPoly.SetBulge 0, -Bulge
DataObjPoly.SetBulge 2, Bulge
DataObjPoly.Closed = True
DataObjPoly.Layer = "DARK2"
DataObjPoly.Update