Subdivision according to existing attributes

Question

Hi Matthias,
I imported polygons (urban blocks) from the fgdb and I want to subdivide my urban blocks with the following attributes:
attr minLotWidth
attr maxLotDepth
attr averageLotArea
attr minLotArea
attr averageNbrOfLot

I know that Shape parameters> Block Parameters have lotWidthMin and lotAreaMin parameters but I cannot use them because I already have existing urban blocks with many attribute fields that I will use afterwrads. Can you help me writing the code, I'm not really familiar with writing rules.

gulhunduran · Answer

Hi,
Yes, these attributes are part of a zoning code and that's why I cannot use manuel input. I'll try ur suggestions, thank you so much for your interest!!
g.

MatthiasBuehler1 · Answer

Hi,

how were those attributes defined ? Where do their actual values come from ?

are those attributes part of a zoning code ?

what you need is not directly and easily possible. You can get near a good solution, but not generate spot-on final geometry.

I'd recommend you start with the skeleton subdivision and start a rule which cuts ( in horizontal direction ), the Lots into the min and max dimensions ( simply with split(x) and split(z). Note that CityEngine works with y being up.)

Then add checks with color(), if the shapes are too wide or thin or deep.

As mentioned, this is something that can not directly be solved because it is an iterative process. you will need manual input.

m.

gulhunduran · Answer

Hi again,
A part of my fgdb polygons are attached.  My urban blocks have those attributes. 
�?� Min Lot width
�?� Max Lot Depth
�?� Average Lot area
�?� Min lot area
�?� Average Number of Lots Per Block 
Each block should be subdivided by �??average lot area�?� value. While doing so, it should also satisfy �?? min lot width�?� and �??max lot depth�?�.  Do not enable creation of lots smaller than �??min lot area�?�. Enable stochastic subdivision as long as �??min lot width�?�& �??max lot width�?� is satisfied. Note that at least one edge of each lot should be on the street side( like skeleton subdivision). 
This is what I�??m trying to code:)

screenhot.jpg

ResultingXML.txt.zip