topic Re: Extrude shapefile according to height attribute in ArcGIS CityEngine Questions

Extrude shapefile according to height attribute

CarlBester — Thu, 01 Mar 2012 05:53:27 GMT

Hi,

I have imported a shapefile into CityEngin and need to extrude the buildings according to an existing height attribute in the shapefile. For example: If there are 3 buildings with height values of 30; 70; 20. Then the buildings have to be extruded according to each one's value.
Do I need to create an attribute which represents the height attribute for each specific shape? The height attribute is Building_height.

attr z = Building_height
Lot --> Shape extrude(z)

Do I need to define the shapefile in the rule code?

Any help will be greatly appreciated

Re: Extrude shapefile according to height attribute

AndréCardoso — Thu, 01 Mar 2012 08:40:31 GMT

Time to give back to community 🙂

Here are the steps:
1- import the shapefile
2- create a rule file and define an attribute with the same name as the one found on the shapefile
3- associate the rule file to each shape imported onto the scene

Look at the screens attached :).

After importing the shapefile and creating the rule which uses a attribute with the SAME name as the one found on the object attributes, you just have to make sure that the rule file is associated to the shapes, and that the attribute from the CGA is sourced to read its value from each shape's attributes.

Hi,

I have imported a shapefile into CityEngin and need to extrude the buildings according to an existing height attribute in the shapefile. For example: If there are 3 buildings with height values of 30; 70; 20. Then the buildings have to be extruded according to each one's value.
Do I need to create an attribute which represents the height attribute for each specific shape? The height attribute is Building_height.

attr z = Building_height
Lot --> Shape extrude(z)

Do I need to define the shapefile in the rule code?

Any help will be greatly appreciated

Re: Extrude shapefile according to height attribute

MatthiasBuehler1 — Thu, 01 Mar 2012 08:52:54 GMT

@ Andre

thanks for joining me on the support front ! 😉

amazing, you're even using the @StartRule decoration !!!

Re: Extrude shapefile according to height attribute

CarlBester — Fri, 02 Mar 2012 03:28:37 GMT

Great!

Thank you Andre! It worked.

Re: Extrude shapefile according to height attribute

roberthughes — Sun, 14 Oct 2012 16:10:08 GMT

brilliant, helped a lot, thank you soo much for this reply!

Re: Extrude shapefile according to height attribute

AmberKenyon — Thu, 17 Mar 2016 15:54:50 GMT

I've followed these steps and applied them to my buildings but they don't seem to be extruding?

I have attatched a number of screenshots to show what I have done. If anyone could help that would be great. CityEngine

Re: Extrude shapefile according to height attribute

LR — Fri, 18 Mar 2016 17:37:06 GMT

Seems fine, are you sure you didn't turn off the models? It's the black house icon on the viewport (not shown in the screenshot ).

Re: Extrude shapefile according to height attribute

AmberKenyon — Thu, 31 Mar 2016 13:38:55 GMT

No its definitely selected and still not working!

Re: Extrude shapefile according to height attribute

valeriisendetskyi — Thu, 31 Mar 2016 17:35:43 GMT

Hi,
tried to use this method to make geometry form GIS data but failed. Looks like the problem is that imported data has HEIGHT attribute with STR type.
And connection editor does not recognize it. If I create similar attribute with FLOAT type everything works nice.
Can somebody make a suggestion on how to get over this problem please.
Tried to reimport data. Not working.

Here's the screen of what I'm talking about: Attribute Connection Editor

Visual difference between FLOAT and STR atrributes is that STR does not have slider.
Would really appreciate some help. Creating all new attributes for every shape is not a solution(

Re: Extrude shapefile according to height attribute

LR — Sat, 11 Dec 2021 09:29:53 GMT

Convert it to float:

attr HEIGHT = ""
Lot -->
  extrude(float(HEIGHT))

If you want to use a slider to adjust the height afterwards you can do this:

@Hidden #optional
attr HEIGHT = ""
attr myHEIGHT = float(HEIGHT)
Lot -->
  extrude(myHEIGHT)

Re: Extrude shapefile according to height attribute

valeriisendetskyi — Thu, 31 Mar 2016 21:52:58 GMT

Thanx for reply.
But it doesn't want to take it either.
I've reloaded the rule, but nothing changed.
Would have been cool to convert attribute permanently. As a separate action. But I'm not good enough in CE to figure it ou

proof: Attribute Connection Editor

Re: Extrude shapefile according to height attribute

LR — Thu, 31 Mar 2016 21:55:40 GMT

No idea then. Try making a new project, or maybe you can upload some sample data?

Re: Extrude shapefile according to height attribute

LR — Thu, 31 Mar 2016 22:14:22 GMT

You have to define it properly in the rule too, i. e. height ="", not height = 0, because then the rule assumes it's a float and won't connect to your str object attribute.

Re: Extrude shapefile according to height attribute

valeriisendetskyi — Fri, 01 Apr 2016 07:56:47 GMT

Thanx a lot! Now it works perfectly)