topic Aligning a facade index to a cardinal direction in ArcGIS CityEngine Questions

Aligning a facade index to a cardinal direction

LR — Thu, 08 Jan 2015 01:44:10 GMT

Hi.

I'm creating a few generic buildings with the same rule — it splits a four-sided block into front, sides and back and textures them. However, as can be seen below, that doesn't always work as the index seems to start randomly(?) on any side.. my current solution are four copies of the script that roate through the four sides, but it's pretty annoying. Is it possible to assign the facade index 0 to, say, north?

Re: Aligning a facade index to a cardinal direction

MatthiasBuehler — Thu, 08 Jan 2015 11:42:29 GMT

Hi,

an index can not be set to north or so.

don't use an index for this .. familiarize yourself with the 'first edge' (see help files / manual) and just use the component selectors.

Matt

Matthias Buehler

Head of 3D Technologies

twitter: @MattB3D

--------------------------------------

Garsdale Design Limited

matthias.buehler@garsdaledesign.co.uk

www.garsdaledesign.co.uk

Re: Aligning a facade index to a cardinal direction

LR — Sun, 12 Dec 2021 00:13:40 GMT

Thanks.

Not sure if I correctly applied it, but this is what I came up with - might as well post it.

version "2014.0"


attr direction = "N" # N, E, S, W
attr roofindex = 0 # 1, 2


Lot -->
  case direction == "N": NorthBuilding
  case direction == "E": EastBuilding
  case direction == "S": SouthBuilding
  case direction == "W": WestBuilding
  else: NorthBuilding



NorthBuilding -->
  cleanupGeometry(all, 0.5)
  extrude (4)
  comp(f){
  world.north: front | 
  world.west: right | 
  world.east: left | 
  world.south: back | 
  top: top
  }

Re: Aligning a facade index to a cardinal direction

Anonymous User — Sun, 12 Dec 2021 00:13:43 GMT

Here is one that might help you. Use whichEdge to rotate the "front" to any edge. -Chris

version "2014.0"  


@Range(0,10) # Range loops modulo style if more than edge count.
attr whichEdge = 0


Lot -->
  # Flatten shape to world xz plane: 
  alignScopeToAxes(y)
  s('1,0,'1)
  # Align scope to edge specified by whichEdge attribute.
  alignScopeToGeometry(yUp, 0, whichEdge) 
  Building 


Building -->  
  extrude(4)  
  comp(f){front: Front | right: Right | left: Left | back: Back | top: Top }
  
Front --> color(1,0,0)
Right --> color(0,1,0)
Left --> color(0,0,1)
Back --> color(1,1,0)
Top --> color(1,0,1)

Re: Aligning a facade index to a cardinal direction

LR — Mon, 02 Feb 2015 01:07:04 GMT

Thanks - I ended up using my rule because it allowed bulk alignment and used your suggestion for the roofs since they didn't accept world.*.

However now I'm looking for a way to do that - fixing wrong roof(s) is pretty time-consuming in large areas.. any idea how to align the roof to cardinal directions? This is how it usually looks like when I generate a row of buildings: