How can I create the two shape build ?

Question

How can I create the two shapes build use CGA rule ?
Like the two Pics:
[ATTACH=CONFIG]19405[/ATTACH]
[ATTACH=CONFIG]19406[/ATTACH]
Thanks very much!

build2.png

build1.png

1SetMyMapCache.jpg

Panning_2.jpg

AlixVezina_2-1748440340085.png

AlixVezina_1-1748440327000.png

Anonymous User · Answer

Original User: fqyfqyfqy

It's very nice.
I'm a newuser of cityengine.
thanks!
😄

Brian_McLeer_1-1769101743202.png

AlfredBaldenweck_0-1769101817477.png

MatthiasBuehler1 · Answer

hi !

If you guarantee that the base is always square, then I'd use an asset. Much easier than to create the form in CGA. If you want it to work on other shapes, read on .. 🙂

--------

The lower one is quite simple.

first, use a roof operation, then directly split that roof volume vertically

e.g.roofHip()
split(y) {'0.5 : RoofForm. | ~1 : NIL}

The first one is a little more complex and can only be created with recursive rules, but using the same concept.

There's an example of such a form in the Philadelphia Example, in the 'GIS-Driven Buildings.cga' rule. Track down the VaultRoof / DomeRoof.

They're using a certain number of recursions, using that number to determine the new angles at each step.

Let me know if you have more questions !

😮