topic Re: Corner lot test not working in ArcGIS CityEngine Questions

Corner lot test not working

curtedmonds — Tue, 05 May 2015 15:32:05 GMT

imports fail to load

reports "no such function" : ? streetWidth()

file Colors.cga contains:

SNOW -->color("#FFFAFA")

real bummer if this is the case, as you cant test a corner lots if you have imports

this code was the default example to test corners, WHY this is not a standard "geometry.isCorner" is beyond me...

version "2014.0"

import col : "Colors.cga" <<<<< error "no such function" : ? streetWidth()

#BuildingVariables

attr BldMasterHeightMin = 10

attr BldMasterHeightMax = 30

attr BldIsCorner = false

attr streetWidth(i) = 0 <<<<<the offending line needed for index Recursion

Lot-->

CornerRecursion(geometry.nVertices - 1, 0)

CornerRecursion ( edgeID, nStreetEdges ) -->

case edgeID >= 0 :

case streetWidth(edgeID) > 0 :

#print (edgeID)

CornerRecursion ( edgeID - 1, nStreetEdges + 1 )

else:

#print (edgeID)

CornerRecursion ( edgeID - 1, nStreetEdges )

else:

case nStreetEdges >= 2 :

#set(BldIsCorner, true)

doLot #corner Lot

else:

#set(BldIsCorner, false)

doLot #Not corner lot

doLot-->

extrude(rand(BldMasterHeightMin, BldMasterHeightMax))

comp(f) { top: doTop | all: doFacard }

doTop-->

roofHip(20)

col.PINK

doFacard-->

col.PINK

Re: Corner lot test not working

Anonymous User — Tue, 05 May 2015 19:35:14 GMT

Hi,

Can you rephrase this as a question? I'm not sure what you are saying/asking.

Chris

Re: Corner lot test not working

curtedmonds — Tue, 05 May 2015 20:01:12 GMT

Sure.

normally the recursive test "CornerRecursion ( edgeID, nStreetEdges ) -->" should function correctly

However (in testing 2014) the same method for testing a corner Lot produces a strange error when the import function is also used.

I have included the recursion test source code and where the error occurs

My question is: has the structure or method for testing a corner lot changed? and if not

why does attr streetWidth(i) = 0 produce an error when simultaneously using an import function

I have tried stripping out the import of source code and still be exists, it is only when I don't use import or don't use the function attr streetWidth(i) = 0.

Has anyone else had experience in "2014" when testing for a corner lot with this problem or is there a new solution.

perhaps the heading should have said:

import function producers an error...when using attr streetWidth(i) = 0 function. to test corner lots

Hope that helps clarify the issue

Cheers

Re: Corner lot test not working

Anonymous User — Wed, 06 May 2015 16:39:02 GMT

The problem is here:

attr streetWidth(i) = 0

Attributes can not be parameterized in CGA. The import has nothing to do with it.

Where did you find this strange code?

Re: Corner lot test not working

curtedmonds — Wed, 06 May 2015 19:50:19 GMT

lol, nice Chris.

I know this is causing the failure, but what then is the the solution to test for a corner lot?

an alternative to this usage..

see Re: How to test whether a lot is on a corner?

this also has attr streetWidth(i) = 0

cheers

Re: Corner lot test not working

Anonymous User — Wed, 06 May 2015 20:53:08 GMT

I was wrong. This code does work. It is StartRules that cannot have parameters, not attributes.

So I tested it and it seems to work in version 2014.1 and 2015.0.

I am glad to see this, because I did not know about it.

Thanks,

Chris

Re: Corner lot test not working

Anonymous User — Wed, 06 May 2015 23:37:18 GMT

Also, it does not work in 2013 or 2014.0. I think that was a feature that got pulled for a few versions. Not sure. So definitely upgrade to version 2015. It has other improvements...

Re: Corner lot test not working

curtedmonds — Thu, 07 May 2015 09:55:12 GMT

k, good to know .

As doubting ones sanity is only fun at parties

thanks