Variables storage

Question

Hey,

Is there a way to store a value at some point in the code so I can use it later - for example:
I want to determine a building's height based on the plot size and its footprint (in order to get my FAr right). So I need to:

1. Measure the plot - geometry.area and save it
2. create the building footprint with ShapeL (or offset / ShapeU....) 
3. now calculate based on a target FAR the height of the building (FAR = plot area / (footprint * no. of stories))
4. extrude the building to the required height

Its just that once I've done the shapeU operation I cannot go back to read the plot area as geometry.area(bottom) will now give me the building footprint.

I tried with assigning the value to a new attr on the Lot rule (just before I divide them) but this doesn't seem to work.

Cheers
T

p.s. working with really tedious urban planners - you know how they can sometimes be ">😐

AndréCardoso · Answer

Exactly! For me, one the great things added in these recent versions of CE was the capability to use "set()" with attributes defined by us. Things get much cleaner...

🙂

TalAisenberg · Answer

Brilliant, Set does the trick.

The problem with the second option is that I only need to use the variable in routines 4 or 5 levels down so bit cumbersome to pass it on and on.

Thanks again,
T

AndréCardoso · Answer

Another possibility is just to pass the original area down to the next rules, as Rule parameters... 
Lot --> 
Rule2(geometry.area)

Rule2(area) -->
Rule3(area)

...