topic Min function implementation in ArcGIS CityEngine Questions

Min function implementation

MarianaDanielová — Tue, 03 Jun 2014 09:13:02 GMT

Hi everybody,

I would like to to use min function in my .cga file which would assign parameter with the lowest value to an attribute.
Is there any way how to do this?

Thank you

Mary

Re: Min function implementation

MatthiasBuehler1 — Fri, 06 Jun 2014 12:32:27 GMT

hi..

please give me an example of what you need.

there's ways to do this, but I need a bit preciser description. ok ? 🙂

matt

Re: Min function implementation

MarianaDanielová — Sun, 12 Dec 2021 03:51:12 GMT

Hey Matt,

and thank you. I will try to describe it in more detail:

I am dealing with the visualization of uncertainty of the archaeological buildings. Simply written, the easiest method is to classify each parameter of the building with some uncertainty value (0,1). I am assuming that each parameter can have more possibilities. And each of these possibilities has different uncertainty value. Then the final value for the entire building would be the lowest (minimum) value from the uncertainty values of each parameters. I am trying to calculate the final value interactively as are the attributes changed in inspector.

@Group("Model options",0) @Order(1) @Range("DoorA","DoorB","DoorC")   
attr type_of_door   = "DoorA"

doorUncertainty    = 
 case "DoorA" : 0.8
 case "DoorB" : 0.9
 else : 0.7

@Group("Model options",0) @Order(2) @Range("WindowA","WindowB","WindowC")   
attr type_of_door   = "WindowA"

windowUncertainty   = 
 case "WindowA" : 1
 case "WindowB" : 0.6
 else : 0.9


@Group("Model options",0) @Order(3) @Range("WallColorA","WallColorB","WallColorC")   
attr type_of_door   = "WallColorA"

wallColorUncertainty  = 
 case "WallColorA" : 0.2
 case "WallColorB" : 0.5
 else : 0.8

Here I would need something like this:

buildingUncertainty = min(doorUncertainty, windowUncertainty, wallColorUncertainty)

I hope that my explanation is understandable 🙂

Thank you

Mary

Re: Min function implementation

MatthiasBuehler1 — Fri, 06 Jun 2014 16:10:36 GMT

do you need exactly 3 inputs to the min() function or 'n' ?

m.

Re: Min function implementation

MarianaDanielová — Fri, 06 Jun 2014 16:38:26 GMT

I need 'n' inputs.. 🙂

Re: Min function implementation

MatthiasBuehler1 — Wed, 11 Jun 2014 06:36:57 GMT

hi ..

I had one implementation, then one of the devs helped to simplify the code:

 attr minA = 3 attr minB = 50 attr minC = 2 attr minD = 12   findMin(valList, index, min) =  case (index < 0): min  else:   case(float(listItem(valList, index)) < min): findMin(valList, index-1, float(listItem(valList, index)))   else:                                        findMin(valList, index-1, min)     findMin(valList) = findMin(valList, listSize(valList)-1, float(listItem(valList, listSize(valList)-1)))  Shape -->  print (findMin(str(minA) + ";" + str(minB) + ";" +  str(minC) + ";" + str(minD) + ";") )

let me know if this works ..

m.

Re: Min function implementation

MarianaDanielová — Wed, 11 Jun 2014 19:19:32 GMT

Hi Matt,

It works! :)) Thank you so much for your help! I am so happy. And really, thank you, you are making my thesis a lot easier 🙂

Mary