Hi guys,

I’m new this semester both to Rhino and programming–I am making my way through David Rutten’s Rhino101 and finally decided to edit my script for a final project in a class I am taking. Unfortunately, the script that I edited that once worked is now broken, and I’m literally breaking it more trying to debug it.

The script is designed to make a set of rotated pentagons that branch each generation into 2 more pentagons. The original (working) script is here so you can see how I’ve broken it:

http://www.giuliopiacentino.com/tree-and-lake/

The idea was to:

- Change the shapes to pentagons
- Scale each object by a random amount (between .9 and 1.1) so that the final shapes could be booleaned together (this is where a lot of the trouble comes).

I would be really grateful for any help–since additional work I do seems to make the problem worse, rather than better.

Thanks again!

Ryan

```
Sub makeGrowingTree
Rhino.AddLayer("Algorithm Tester")
Rhino.CurrentLayer("AlgorithmTester")
Dim originPoint, arrPlane, arrPentagonOrigin, arr3dX, arr3dY, arr3dZ, advanceBy
'Shapes changed from circles to Pentagons, but any shape may be used
Dim pentagon, rotatedPentagon
'Declaring variables with the name of the shape helps understand, make sure to change these
Dim angleX:angleX = 15
Dim angleZ:angleZ = 25
'Sets Rotation Angle, in this case only rotating in the X and Z axis
originPoint = Array(0, 0, 0)
'Sets the origin
advanceBy = Array(0, 0, 10)
'Number of units you will increase in each generation. This is fixed
Dim generations:generations = 3
'Number of times the script will run
Dim listGenerations()
ReDim listGenerations(generations,4^generations-1)
'Each time you are increasing the number of times you run the script by 4^n-1
Dim cumulativeRotations()
ReDim cumulativeRotations(4^generations-1)
Dim generationNum, childNum, colsToFill, startToFill, fillingChild
'draw the pentagon
arrPentagonOrigin = Array(0, 0, 0)
arr3dX = Array(1, 0, 0)
arr3dY = Array(0, 1, 0)
arr3dZ = Array(0, 0, 1)
arrPlane = Array(arrPentagonOrigin, arr3dX, arr3dY, arr3dZ)
'dimension of the pentagon
pentagon = Rhino.addPolygon(arrPlane, 5, 5)
'Change the number of sides and size of the polygon. First 5 is the radius, the second 5 is the number of sides
For childNum = 0 To 2 ^ generations - 1
cumulativeRotations(childNum) = 0
listGenerations(0, childNum) = pentagon
Next
For generationNum = 1 To generations
For childNum = 0 To 4 ^ generationNum - 1
colsToFill = 4 ^ (generations - generationNum)
startToFill = childNum * colsToFill
For fillingChild=0 To colsToFill - 1
If (childNum Mod 2) = 0 Then
cumulativeRotations(fillingChild + startToFill) = cumulativeRotations(fillingChild + startToFill) + angleX
Else
cumulativeRotations(fillingChild + startToFill) = cumulativeRotations(fillingChild + startToFill) - angleX
End If
Next
Dim dblLow:dblLow = 0.90
Dim dblHigh:dblHigh = 1.10
Randomize
Dim Random:Random = Rnd * (dblHigh - dblLow) + dblLow
Dim arrRand:arrRand = (Random,Random, Random)
arrPentagonOrigin = Rhino.CurveMidPoint(listGenerations(generationNum - 1, startToFill))
'CurveMidPoint replace Circle Center
'MsgBox generationNum
'the new circle is copied and repositioned
rotatedPentagon = Rhino.scaleObject(listGenerations(generationNum - 1, startToFill), arrPentagonOrigin, Array(0.8, 0.8, 0.8), True)
Rhino.MoveObject rotatedPentagon, originPoint, advanceBy
Rhino.RotateObject rotatedPentagon, originPoint, cumulativeRotations(startToFill), arr3dX, False
Rhino.RotateObject rotatedPentagon, originPoint, angleZ * Sqr(generationNum), arr3dZ, False
Rhino.ScaleObject(rotatedPentagon, arrPentagonOrigin, arrRand, False)
'MsgBox "Generation is " & generationNum & "." & Chr(13) & "Columns to fill are " & colsToFill & ". Start filling at " & startToFill & "."
For fillingChild=0 To colsToFill - 1
listGenerations(generationNum, fillingChild + startToFill) = rotatedPentagon
Next
Next
Next
'Prepare the 2-dimension array to a 1-dimension and loft
Dim arrCurves(), i
ReDim arrCurves(UBound(listGenerations,1))
For childNum=0 To UBound(listGenerations, 2)
For i=0 To UBound(listGenerations, 1)
arrCurves(i) = listGenerations(i, childNum)
Next
Rhino.AddLoftSrf arrCurves 'normal
'Rhino.AddLoftSrf arrCurves, , , 1 'loose
'Rhino.AddLoftSrf arrCurves, , , 2 'tight
Next
End Sub
Rhino.EnableRedraw False
Call makeGrowingTree
Rhino.EnableRedraw True
```