'skin panel prototype 'joshua vermillion '8 june 2006

'In: Surface, U and V divisions, apperture height 'Out: Skin panel prototypes created as developable surfaces, ready to be unrolled and laser cut

'The skin panels and the script which generates the panels forms and shapes were devised by me 'Most of the upfront scripting, dealing with surface redescription and surface tiling was lifted 'from a script written by Andrew Kudless:

Option Explicit

Sub skin01

   Dim sourceSurface, uDiv, vDiv, height, grid
   Dim uStep, vStep
   Dim uVal, vVal
   Dim i, j
   Dim tilePoints(3)
   Dim apexData, apexPoint1, apexPoint2, apexPoint3, apexPoint4, apexPoint5, apexPoint6
   Dim apexPoint7, apexPoint8, apexPoint9, apexPoint10, apexPoint11, apexPoint12
   Dim arrPoint

   'Prompt user for input data
   sourceSurface = Rhino.GetObject("Select a surface to populate", 8)
   uDiv = Rhino.GetInteger("Enter the number of divisions in the U direction", 4, 1)
   vDiv = Rhino.GetInteger("Enter the number of divisions in the V direction", 20, 1)
   height = Rhino.GetReal("Enter a height for the spaceframe")
   'End input data
   'To simplify the script, the surface is reparameterized to go from 0 to 1 in both directions
   Rhino.SelectObject sourceSurface
   Rhino.Command "Reparameterize 0 1 0 1 "
   'Redimension the arrays that will hold all the values of U and V to the number of tiles in each direction
   ReDim uVal(uDiv)
   ReDim vVal(vDiv)
   ReDim apexPoint1 ((uDiv-1),(vDiv-1))
   ReDim apexPoint2 ((uDiv-1),(vDiv-1))
   ReDim apexPoint3 ((uDiv-1),(vDiv-1))
   ReDim apexPoint4 ((uDiv-1),(vDiv-1))
   ReDim apexPoint5 ((uDiv-1),(vDiv-1))
   ReDim apexPoint6 ((uDiv-1),(vDiv-1))
   ReDim apexPoint7 ((uDiv-1),(vDiv-1))
   ReDim apexPoint8 ((uDiv-1),(vDiv-1))
   ReDim apexPoint9 ((uDiv-1),(vDiv-1))
   ReDim apexPoint10 ((uDiv-1),(vDiv-1))
   ReDim apexPoint11 ((uDiv-1),(vDiv-1))
   ReDim apexPoint12 ((uDiv-1),(vDiv-1))
   'Find the step value, i.e. the distance between tiles in each direction. (note: this is not the euclidian distance, it is the distance measured in UV space)
   uStep = 1/uDiv
   vStep = 1/vDiv
   'Fill the arrays with the actual values of U and V at each step
   For i = 0 To uDiv
       uVal(i) = i * uStep
       Rhino.Print "uVal(" & i & "):" & uVal(i)
   For i = 0 To vDiv
       vVal(i) = i * vStep
       Rhino.Print "vVal(" & i & "):" & vVal(i)
   'Disable Rhino from redrawing the views during the tile construction to speed things up
   'Rhino.EnableRedraw vbFalse
   Rhino.Print "Constructing spaceframe..."
   'Start looping through each u and v division and create the tile within
   For i = 0 To uDiv-1
       For j = 0 To vDiv-1
           Dim a1, b1, d1, e1, f1, h1, k1, l1, m1, n1, o1, p1, q1
           Dim a2, b2, d2, e2, f2, h2, k2, l2, m2, n2, o2, p2, q2
           'Find the 3D coordinate for each of the 4 corners of the tile using the UV coordinates as input
           tilePoints(0) = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j)))
           tilePoints(1) = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i+1), vVal(j)))
           tilePoints(2) = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i+1), vVal(j+1)))
           tilePoints(3) = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j+1)))

           a1 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j)+(vVal(1)/2)))
           b1 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)/5), vVal(j)+(vVal(1)/2)))
           d1 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)*.8), vVal(j)+(vVal(1)/2)))
           e1 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+uVal(1), vVal(j)+(vVal(1)/2)))
           f1 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+uVal(1), vVal(j)))
           h1 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)/2), vVal(j)))
           k1 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j)))
           l1 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)/2), vVal(j)+(vVal(1)/3)))
           n1 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)/5), vVal(j)+(vVal(1)/6)))
           p1 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)*.8), vVal(j)+(vVal(1)/6)))
           a2 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j)+(vVal(1)/2)))
           b2 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)/5), vVal(j)+(vVal(1)/2)))
           d2 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)*.8), vVal(j)+(vVal(1)/2)))
           e2 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+uVal(1), vVal(j)+(vVal(1)/2)))
           f2 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+uVal(1), vVal(j)+vVal(1)))
           h2 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)/2), vVal(j)+vVal(1)))
           k2 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j)+vVal(1)))
           l2 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)/2), vVal(j)+(vVal(1)*.67)))
           n2 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)/5), vVal(j)+(vVal(1)*.83)))
           p2 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)*.8), vVal(j)+(vVal(1)*.83)))
           Dim l1curvature, n1curvature, p1curvature
           Dim l2curvature, n2curvature, p2curvature
           l1curvature = l1(2)
           n1curvature = n1(2)
           p1curvature = p1(2)
           l2curvature = l2(2)
           n2curvature = n2(2)
           p2curvature = p2(2)
           apexPoint1(i,j) = offsetCalc(l1, height*l1curvature)
           apexPoint2(i,j) = offsetCalc(n1, height*n1curvature)
           apexPoint3(i,j) = offsetCalc(p1, height*p1curvature)
           apexPoint4(i,j) = offsetCalc(l2, height*l2curvature)
           apexPoint5(i,j) = offsetCalc(n2, height*n2curvature)
           apexPoint6(i,j) = offsetCalc(p2, height*p2curvature)
           Dim ak1, bk1, bo1, bh1, mh1, dh1, dq1, df1, ef1
           Dim ab1, bm1, md1, ko1, oh1, hq1, fq1, de1
           Dim ak2, bk2, bo2, bh2, mh2, dh2, dq2, df2, ef2 
           Dim ab2, bm2, md2, ko2, oh2, hq2, fq2, de2         
           ak1 = Rhino.AddLine(a1, k1)
           bk1 = Rhino.AddLine(b1, k1)
           bo1 = Rhino.AddLine(b1, apexPoint2(i,j))
           bh1 = Rhino.AddLine(b1, h1)
           mh1 = Rhino.AddLine(apexPoint1(i,j), h1)
           dh1 = Rhino.AddLine(d1, h1)
           dq1 = Rhino.AddLine(d1, apexPoint3(i,j))
           df1 = Rhino.AddLine(d1, f1)
           ef1 = Rhino.AddLine(e1, f1)
           ab1 = Rhino.AddLine(a1, b1)
           bm1 = Rhino.AddLine(b1, apexPoint1(i,j))
           md1 = Rhino.AddLine(apexPoint1(i,j), d1)
           ko1 = Rhino.AddLine(k1, apexPoint2(i,j))
           oh1 = Rhino.AddLine(apexPoint2(i,j), h1)
           hq1 = Rhino.AddLine(h1, apexPoint3(i,j))
           fq1 = Rhino.AddLine(f1, apexPoint3(i,j))
           de1 = Rhino.AddLine(d1, e1)
           ak2 = Rhino.AddLine(a2, k2)
           bk2 = Rhino.AddLine(b2, k2)
           bo2 = Rhino.AddLine(b2, apexPoint5(i,j))
           bh2 = Rhino.AddLine(b2, h2)
           mh2 = Rhino.AddLine(apexPoint4(i,j), h2)
           dh2 = Rhino.AddLine(d2, h2)
           dq2 = Rhino.AddLine(d2, apexPoint6(i,j))
           df2 = Rhino.AddLine(d2, f2)
           ef2 = Rhino.AddLine(e2, f2)
           ab2 = Rhino.AddLine(a2, b2)
           bm2 = Rhino.AddLine(b2, apexPoint4(i,j))
           md2 = Rhino.AddLine(apexPoint4(i,j), d2)
           ko2 = Rhino.AddLine(k2, apexPoint5(i,j))
           oh2 = Rhino.AddLine(apexPoint5(i,j), h2)
           hq2 = Rhino.AddLine(h2, apexPoint6(i,j))
           fq2 = Rhino.AddLine(f2, apexPoint6(i,j))
           de2 = Rhino.AddLine(d2, e2)
           Dim arrObjects1, arrObjects2
           Dim arrabk1, arrbko1, arrbho1, arrbhm1, arrdmh1, arrdhq1, arrdfq1, arrdef1
           Dim arrabk2, arrbko2, arrbho2, arrbhm2, arrdmh2, arrdhq2, arrdfq2, arrdef2
           Dim abk1, bko1, bho1, bhm1, dmh1, dhq1, dfq1, def1
           Dim abk2, bko2, bho2, bhm2, dmh2, dhq2, dfq2, def2
           arrabk1 = Array(ak1, bk1, ab1)
           arrbko1 = Array(bk1, bo1, ko1)
           arrbho1 = Array(bo1, bh1, oh1)
           arrbhm1 = Array(bh1, bm1, mh1)
           arrdmh1 = Array(dh1, md1, mh1)
           arrdhq1 = Array(dh1, dq1, hq1)
           arrdfq1 = Array(dq1, df1, fq1)
           arrdef1 = Array(df1, de1, ef1)
           arrabk2 = Array(ak2, bk2, ab2)
           arrbko2 = Array(bk2, bo2, ko2)
           arrbho2 = Array(bo2, bh2, oh2)
           arrbhm2 = Array(bh2, bm2, mh2)
           arrdmh2 = Array(dh2, md2, mh2)
           arrdhq2 = Array(dh2, dq2, hq2)
           arrdfq2 = Array(dq2, df2, fq2)
           arrdef2 = Array(df2, de2, ef2)
           abk1 = Rhino.AddPlanarSrf(arrabk1)
           bko1 = Rhino.AddPlanarSrf(arrbko1)
           bho1 = Rhino.AddPlanarSrf(arrbho1)
           bhm1 = Rhino.AddPlanarSrf(arrbhm1)
           dmh1 = Rhino.AddPlanarSrf(arrdmh1)
           dhq1 = Rhino.AddPlanarSrf(arrdhq1)
           dfq1 = Rhino.AddPlanarSrf(arrdfq1)
           def1 = Rhino.AddPlanarSrf(arrdef1)
           abk2 = Rhino.AddPlanarSrf(arrabk2)
           bko2 = Rhino.AddPlanarSrf(arrbko2)
           bho2 = Rhino.AddPlanarSrf(arrbho2)
           bhm2 = Rhino.AddPlanarSrf(arrbhm2)
           dmh2 = Rhino.AddPlanarSrf(arrdmh2)
           dhq2 = Rhino.AddPlanarSrf(arrdhq2)
           dfq2 = Rhino.AddPlanarSrf(arrdfq2)
           def2 = Rhino.AddPlanarSrf(arrdef2)
           Dim strSurface1, strSurface2
           arrObjects1 = Array(abk1, bko1, bho1, bhm1, dmh1, dhq1, dfq1, def1)
           'strSurface1 = Rhino.JoinSurfaces(arrObjects1, True)
           arrObjects2 = Array(abk2, bko2, bho2, bhm2, dmh2, dhq2, dfq2, def2)
           'strSurface2 = Rhino.JoinSurfaces(arrObjects2, True)
           If (j = vDiv-1) Then
             i = i+1
           End If

   For i = 0 To uDiv-1
       For j = 0 To vDiv-1
           Dim a3, b3, c3, d3, e3, f3, g3, h3, k3, l3
           Dim a4, b4, c4, d4, e4, f4, g4, h4, k4, l4
           If (j = 0) Then
           i = i+1
           End If
           'Find the 3D coordinate for each of the 4 corners of the tile using the UV coordinates as input
           tilePoints(0) = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j)))
           tilePoints(1) = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i+1), vVal(j)))
           tilePoints(2) = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i+1), vVal(j+1)))
           tilePoints(3) = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j+1)))

           a3 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j)+(vVal(1)/2)))
           b3 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)/2), vVal(j)+(vVal(1)/2)))
           c3 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+uVal(1), vVal(j)+(vVal(1)/2)))
           d3 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+uVal(1), vVal(j)))
           e3 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)*.8), vVal(j)))
           f3 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)/5), vVal(j)))
           g3 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j)))
           h3 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)/2), vVal(j)+(vVal(1)/6)))
           k3 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)/5), vVal(j)+(vVal(1)/3)))
           l3 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)*.8), vVal(j)+(vVal(1)/3)))
           a4 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j)+(vVal(1)/2)))
           b4 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)/2), vVal(j)+(vVal(1)/2)))
           c4 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+uVal(1), vVal(j)+(vVal(1)/2)))
           d4 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+uVal(1), vVal(j)+vVal(1)))
           e4 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)*.8), vVal(j)+vVal(1)))
           f4 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i)+(uVal(1)/5), vVal(j)+vVal(1)))
           g4 = Rhino.EvaluateSurface(sourceSurface, Array(uVal(i), vVal(j)+vVal(1)))
           h4 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)/2), vVal(j)+(vVal(1)*.83)))
           k4 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)/5), vVal(j)+(vVal(1)*.67)))
           l4 = Rhino.SurfaceCurvature(sourceSurface, Array(uVal(i)+(uVal(1)*.8), vVal(j)+(vVal(1)*.67)))
           Dim h3curvature, k3curvature, l3curvature
           Dim h4curvature, k4curvature, l4curvature
           h3curvature = h3(2)
           k3curvature = k3(2)
           l3curvature = l3(2)
           h4curvature = h4(2)
           k4curvature = k4(2)
           l4curvature = l4(2)
           apexPoint7(i,j) = offsetCalc(h3, height*h3curvature)
           apexPoint8(i,j) = offsetCalc(k3, height*k3curvature)
           apexPoint9(i,j) = offsetCalc(l3, height*l3curvature)
           apexPoint10(i,j) = offsetCalc(h4, height*h4curvature)
           apexPoint11(i,j) = offsetCalc(k4, height*k4curvature)
           apexPoint12(i,j) = offsetCalc(l4, height*l4curvature)
           Dim ag3, af3, kf3, bf3, bh3, be3, le3, ce3, cd3
           Dim fg3, fh3, eh3, de3, cl3, bl3, bk3, ak3
           Dim ag4, af4, kf4, bf4, bh4, be4, le4, ce4, cd4
           Dim fg4, fh4, eh4, de4, cl4, bl4, bk4, ak4
           ag3 = Rhino.AddLine(a3, g3)
           af3 = Rhino.AddLine(a3, f3)
           kf3 = Rhino.AddLine(apexPoint8(i,j), f3)
           bf3 = Rhino.AddLine(b3, f3)
           bh3 = Rhino.AddLine(b3, apexPoint7(i,j))
           be3 = Rhino.AddLine(b3, e3)
           le3 = Rhino.AddLine(apexPoint9(i,j), e3)
           ce3 = Rhino.AddLine(c3, e3)
           cd3 = Rhino.AddLine(c3, d3)
           fg3 = Rhino.AddLine(f3, g3)
           fh3 = Rhino.AddLine(f3, apexPoint7(i,j))
           eh3 = Rhino.AddLine(e3, apexPoint7(i,j))
           de3 = Rhino.AddLine(d3, e3)
           cl3 = Rhino.AddLine(c3, apexPoint9(i,j))
           bl3 = Rhino.AddLine(b3, apexPoint9(i,j))
           bk3 = Rhino.AddLine(b3, apexPoint8(i,j))
           ak3 = Rhino.AddLine(a3, apexPoint8(i,j))
           ag4 = Rhino.AddLine(a4, g4)
           af4 = Rhino.AddLine(a4, f4)
           kf4 = Rhino.AddLine(apexPoint11(i,j), f4)
           bf4 = Rhino.AddLine(b4, f4)
           bh4 = Rhino.AddLine(b4, apexPoint10(i,j))
           be4 = Rhino.AddLine(b4, e4)
           le4 = Rhino.AddLine(apexPoint12(i,j), e4)
           ce4 = Rhino.AddLine(c4, e4)
           cd4 = Rhino.AddLine(c4, d4)
           fg4 = Rhino.AddLine(f4, g4)
           fh4 = Rhino.AddLine(f4, apexPoint10(i,j))
           eh4 = Rhino.AddLine(e4, apexPoint10(i,j))
           de4 = Rhino.AddLine(d4, e4)
           cl4 = Rhino.AddLine(c4, apexPoint12(i,j))
           bl4 = Rhino.AddLine(b4, apexPoint12(i,j))
           bk4 = Rhino.AddLine(b4, apexPoint11(i,j))
           ak4 = Rhino.AddLine(a4, apexPoint11(i,j))
           Dim arrObjects3, arrObjects4
           Dim arrafg3, arrafk3, arrbfk3, arrbfh3, arrbeh3, arrbel3, arrcel3, arrcde3
           Dim arrafg4, arrafk4, arrbfk4, arrbfh4, arrbeh4, arrbel4, arrcel4, arrcde4
           Dim afg3, afk3, bfk3, bfh3, beh3, bel3, cel3, cde3
           Dim afg4, afk4, bfk4, bfh4, beh4, bel4, cel4, cde4
           arrafg3 = Array(af3, ag3, fg3)
           arrafk3 = Array(af3, kf3, ak3)
           arrbfk3 = Array(bf3, bk3, kf3)
           arrbfh3 = Array(bf3, bh3, fh3)
           arrbeh3 = Array(be3, eh3, bh3)
           arrbel3 = Array(be3, le3, bl3)
           arrcel3 = Array(ce3, le3, cl3)
           arrcde3 = Array(cd3, de3, ce3)
           arrafg4 = Array(af4, ag4, fg4)
           arrafk4 = Array(af4, kf4, ak4)
           arrbfk4 = Array(bf4, bk4, kf4)
           arrbfh4 = Array(bf4, bh4, fh4)
           arrbeh4 = Array(be4, eh4, bh4)
           arrbel4 = Array(be4, le4, bl4)
           arrcel4 = Array(ce4, le4, cl4)
           arrcde4 = Array(cd4, de4, ce4)
           afg3 = Rhino.AddPlanarSrf(arrafg3)
           afk3 = Rhino.AddPlanarSrf(arrafk3)
           bfk3 = Rhino.AddPlanarSrf(arrbfk3)
           bfh3 = Rhino.AddPlanarSrf(arrbfh3)
           beh3 = Rhino.AddPlanarSrf(arrbeh3)
           bel3 = Rhino.AddPlanarSrf(arrbel3)
           cel3 = Rhino.AddPlanarSrf(arrcel3)
           cde3 = Rhino.AddPlanarSrf(arrcde3)
           afg4 = Rhino.AddPlanarSrf(arrafg4)
           afk4 = Rhino.AddPlanarSrf(arrafk4)
           bfk4 = Rhino.AddPlanarSrf(arrbfk4)
           bfh4 = Rhino.AddPlanarSrf(arrbfh4)
           beh4 = Rhino.AddPlanarSrf(arrbeh4)
           bel4 = Rhino.AddPlanarSrf(arrbel4)
           cel4 = Rhino.AddPlanarSrf(arrcel4)
           cde4 = Rhino.AddPlanarSrf(arrcde4)
           Dim strSurface3, strSurface4
           arrObjects3 = Array(abk1, bko1, bho1, bhm1, dmh1, dhq1, dfq1, def1)
           'strSurface3 = Rhino.JoinSurfaces(arrObjects3, True)
           arrObjects4 = Array(abk2, bko2, bho2, bhm2, dmh2, dhq2, dfq2, def2)
           'strSurface4 = Rhino.JoinSurfaces(arrObjects4, True)

End Sub

'Call the sub skin01

'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' 'This fucntion finds the coordinate of a point normal to, and at a <height> from, a point on the surface Function offsetCalc(oData, height)

        Dim vscaled
        vscaled = VectorScale(oData(1),height)
        offsetCalc = VectorAdd(vscaled,oData(0))

End Function

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' 'function by RMA, "vectors.rvb" Function VectorAdd(v1, v2)

        VectorAdd = Null
        If Not IsArray(v1) Or (UBound(v1) <> 2) Then Exit Function
        If Not IsArray(v2) Or (UBound(v2) <> 2) Then Exit Function
        VectorAdd = Array(v1(0) + v2(0), v1(1) + v2(1), v1(2) + v2(2))

End Function

''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''' 'function by RMA, "vectors.rvb" Function VectorScale(v, d)

        VectorScale = Null
        If Not IsArray(v) Or (UBound(v) <> 2) Then Exit Function
        If Not IsNumeric(d) Then Exit Function
        VectorScale = Array(v(0) * d, v(1) * d, v(2) * d)

End Function

'-------------------------------------------------------------------------------------------------------------------- 'This function checks if the current layer is <layername> and if it isn't, makes it so. If the layer <layername> doesn't ' exist then it creates it with the name <layername>. Function CheckLayer(layername)

        If Rhino.IsLayer(layername) Then
        End If

End Function

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