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' DivideCurveEquiDistant.rvb -- April 2008
' If this code works, it was written by Dale Fugier.
' If not, I don't know who wrote it.
' Works with Rhino 4.0.
Option Explicit
Sub DivideCurveEquiDistant
Dim crv
crv = Rhino.GetObject("Select curve to divide", 4, True)
If IsNull(crv) Then Exit Sub
Dim crv_length
crv_length = Rhino.CurveLength(crv)
Dim length
length = Rhino.GetReal("Curve length is " & CStr(crv_length) & ". Division length", 1.0)
If Not IsNumeric(length) Then Exit Sub
If (crv_length < length) Then
Rhino.Print "Specified divison length exceeds curve length."
Exit Sub
End If
Rhino.EnableRedraw False
Dim dom, t, pt
dom = Rhino.CurveDomain(crv)
t = dom(0)
pt = Rhino.EvaluateCurve(crv, t)
Rhino.AddPoint pt
Dim bDone: bDone = False
While (bDone = False)
t = EquiDistantParameter(crv, t, length)
If IsNull(t) Then
bDone = True
pt = Rhino.EvaluateCurve(crv, t)
Rhino.AddPoint pt
End If
Rhino.EnableRedraw True
End Sub
Function EquiDistantParameter(crv, t, length)
EquiDistantParameter = Null
Dim pt : pt = Rhino.EvaluateCurve(crv, t)
Dim sphere : sphere = Rhino.AddSphere(pt, length)
Dim csx : csx = Rhino.CurveSurfaceIntersection(crv, sphere)
Rhino.DeleteObject sphere
If Not IsArray(csx) Then Exit Function
Dim i
For i = 0 To UBound(csx)
If csx(i,0) = 1 Then
If (csx(i,5) > t) Then
EquiDistantParameter = csx(i,5)
Exit Function
End If
End If
End Function
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