Can anyone offer me any help with why I am getting a "Mismatch Token" error in this rule on the line indicated in bold?

[LindaBarrett2]

@Range ("Gable","Hip","Flat","Pyramid")
attr RoofType = "Gable"

@Range ("Bungalow","SplitLevel","TwoStorey","ThreeStorey")
attr myUseType = "Bungalow"

@StartRule
BronteFootprints -->
comp (f) {top:Roof |side:Wall}

Extrude -->
         extrude(myUseType)

* case whatUse == "Bungalow" : BungalowUseType
   case whatUse == "TwoStorey" : TwoStoreyUseType
   case whatUse == "ThreeStorey" : ThreeStoreyUseType
   case whatUse == "SplitLevel" : SplitLevelUseType
   else: Other.

BungalowUseType -->
            BungalowUse (2.75)
TwoStoreyUseType -->
T         woStoreyUse (5.5)
ThreeStoreyUseType -->
         ThreeStoreyUse (8.25)
SplitLevelUseType -->
         SplitLevelUse (4.15)

Roof-->
         case RoofType == "Gable" : GableRoof
         case RoofType == "Hip" : HipRoof
         case RoofType == "Pyramid" : PyramidRoof
         else: FlatRoof.
         color (0,1,0)

GableRoof-->
roofGable(30)
HipRoof-->
roofHip(30)
PyramidRoof-->
roofPyramid(30)
Wall-->
color (46,46,46)

[ThomasFuchs]

Hello Linda,

Thank you for your question. The CGA language is structured by concatenating rules. Separating parts of a rule that are common from conditional ones helps in analyzing the shape tree. So if you are using a case statement, it has to be encapsulated in a conditional rule.

Everything preceding the conditions needs to be put into a separate rule. It is possible to generate different successors for different conditions of rule parameters or shape attributes. The case and the else statements must build a consecutive block and can not be interrupted with successors (like a switch-case block, NOT like if statements in well-known programming languages).

PredecessorShape --> 
                     case condition1: Successor1 


                     case condition2: Successor2
                     ...
                     else: SuccessorN 
‍‍‍‍‍‍‍

[DuliniRatnayake]

Hi Linda,

You need a conditional statement as Thomas mentioned but I would use attribute data to extrude buildings foot prints, which is less complex.I am also working on a similar rule.

Call me if you need any help.

Dulini

[LindaBarrett2]

Hi Dulini,

I may do that.  Thanks for your help

[LR]

You're trying to extrude using text as parameter. You're also never calling the Extrude rule. Case rules also can't have any commands but cases. Try this instead:

@Range ("Bungalow","SplitLevel","TwoStorey","ThreeStorey")
attr myUseType = "Bungalow"

@Hidden
attr myUseTypeHeight = 0

@StartRule 
Lot -->
 SetHeight
 
SetHeight -->
 case myUseType == "Bungalow": set(myUseTypeHeight, 2.75) Extrude
 case myUseType == "SplitLevel": set(myUseTypeHeight, 4.15) Extrude
 case myUseType == "TwoStorey": set(myUseTypeHeight, 5.5) Extrude
 case myUseType == "ThreeStorey": set(myUseTypeHeight, 8.25) Extrude
 else: set(myUseTypeHeight, 1) Extrude

Extrude -->
 extrude(myUseTypeHeight)
 comp (f) {top:Roof |side:Wall}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[LindaBarrett2]

Thank you - this is exactly what I was looking for.