Getting the "last" split index of a rule

Question

I'm dividing a building into horizontal slices and running an occlusion query, which colors the slices according to the touch results. I'd like to color the last slice touched in a different color. However, I can't figure out how to actually catch the last index. When I print the split.index the results are ordered in the console, suggesting that there does seem to be a way to catch the last split. Is it possible?

Rule:

version "2015.2"

attr SplitAccuracy = 10
attr BuildingHeight = 200
attr TouchColor = "#AAAAFF"
attr BuildingColor = "#AAFFAA"
attr LineColor = "#FFAAAA"
attr SplitCount = 0

@StartRule
Lot --> 
  extrude(1)
  s(100,BuildingHeight,100) center (xz)
  SplitBuildings

SplitBuildings -->
  split(y){SplitAccuracy:CompBuildings}*

CompBuildings -->
  comp(f) {top : TouchCheck | side : Numbering}

Numbering -->
  set(SplitCount, split.index)
  texture("assets/no/no_"+SplitCount+".png")
  alignScopeToGeometry(zUp, 0, world.lowest)
  setupProjection(0, scope.xy, '1.0000, '1.0000)
  projectUV(0)
  TouchCheck

TouchCheck -->
  case touches(inter): TouchedRedlineCase
  else : NotTouched

TouchedRedlineCase -->
  #"case split.index == last split.index: LineColorColor"
  case split.index == 3 : LineColorColor 
  else: TouchColorColor

NotTouched --> color(BuildingColor)
LineColorColor --> color(LineColor)
TouchColorColor --> color(TouchColor)

Result, with manual setting of the split index:

LR · Answer

Thanks, but I'm not looking for the entire split count, just the number of the last one that triggered the touch(). So split.index 3 in the example. Obviously I can't tell which number it is when I use the rule in multiple buildings with different elevation.. If I change the rule to this:

TouchCheck -->
  case touches(inter): Touched
  else : NotTouched

Touched -->
  print("Touched, "+split.index)

NotTouched -->
  print("NotTouched, "+split.index)

I get this ordered output:

Touched, 0
Touched, 1
Touched, 2
Touched, 3
NotTouched, 4
NotTouched, 5
NotTouched, 6
NotTouched, 7
NotTouched, 8
NotTouched, 9

so I thought maybe there's a way to catch that last "Touched" split.

Anonymous User · Answer

split.total gives the total number of splits.

Chris