Built form - four towers on a podium

Question

We're writing a write a built form rule that consists of a podium and four towers. Each tower is to have their own configurable setbacks.

We've tried placing a splitArea command with a splitArea command, but this simply creates

splitArea(z) { ~1 : splitArea(x) { '0.5: TowerLots}* 
 | ~1 : splitArea(x) {'1 : TowerLots}* 
 }

split.index 0 is tower 1

split.index 1 is tower 1

split.index 2 is tower 2

split.index 3 is tower 2

Wondering if anyone has any ideas on how best to split the podium into four so we can assign a tower to each of the split indexes?

i.e.

split.index 0 is tower 1

split.index 1 is tower 2

split.index 2 is tower 3

split.index 3 is tower 4

Thanks.

LR · Accepted Answer

The split.index is overwritten on a new split. You're splitting once, creating two polygons (index 0 and 1), and then you're splitting those too, creating index 0 and 1 or each. AFAIK you'd have to store the index info somewhere, like this: attr CumulativeSplitIndex = "" @StartRule Lot --> splitArea(z){ '0.5: TowerLots1}* TowerLots1 --> set(CumulativeSplitIndex, "z"+split.index) splitArea(x){ '0.5: TowerLots2}* TowerLots2 --> set(CumulativeSplitIndex, CumulativeSplitIndex+"x"+split.index) print (CumulativeSplitIndex)‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ This should give you addressable lots for a conditional rule. Alternatively, you could of course do it all manually, like this: attr SetBack_1 = 0 attr SetBack_2 = 0 attr SetBack_3 = 0 attr SetBack_4 = 0 @StartRule Lot --> splitArea(z) { '0.5: Split_Z_1 | '0.5: Split_Z_2 } Split_Z_1 --> splitArea(x) { '0.5: Split_X_1_1 | '0.5: Split_X_1_2 } Split_Z_2 --> splitArea(x) { '0.5: Split_X_2_1 | '0.5: Split_X_2_2 } Split_X_1_1 --> setback(SetBack_1){all: X | remainder: Tower} # repeat for rest Tower --> extrude (10)‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍