Setback Rule Problem

Question

Hi All

Hope you all are safe and well

I have a problem with my cga code that I have no idea how to fix. Trying to create edge fence for Lots by using the setback rule, what  I have are Lots has street attribute. When I use the setback rule it works fine until i extrude it. As shown below somehow the edge that was the back of the street was extruded the same as street front whilst the sides worked fine.

Please help

The code I used:

version "2019.1"

@Enum ("yes","no")

attr fencing =    "no"

attr fence_Width =0.025

@StartRule

Lot -->

cleanupGeometry(all, 0.1)

print(array)

Lawn_Border

Lawn_Border-->

case fencing=="yes": offset(-fence_Width) Build_Fence

else: Lawn

Build_Fence   --> comp(f) { inside = Lawn | border= Fence_Sort }

Fence_Sort--> setback( comp(fe) { street.front = 5 }) { all =  Front_Fence label("Front Fence") | remainder=Rear_Fence}

Front_Fence-->

extrude(world.y,1.2)

Rear_Fence-->

extrude(world.y,1.8)

Lawn-->

extrude(0.05)

color("#b3c989")

Kevin_Z · Answer

Thank you Cheryl for your great help,

CherylLau · Answer

This code makes a fence where the front is a different height than the other sides. It performs an offset on a lot and extrudes the offset borders such that the side facing the street front is a different height than the others. Lot --> offset(-fence_depth) comp(f) { inside=Lawn | border: r(90,0,0) Fence } Fence --> case geometry.isOriented(street.front): r(-90,0,0) extrude(fence_height_front) else: r(-90,0,0) extrude(fence_height_other) ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

Kevin_Z · Answer

Hi Cheryl

Thanks for the reply, what I'm trying to do something like the image below, that the front yard of the lot installs low fences (maintain street appeal)and the back of rest of the lot uses high fences for (privacy), with the code above the back facing edge(fence) only extruded 1.2 rather than the intended 1.8 so I'm wondering what did I do wrong and how to fix it.

Your code sets back the front yard which splits the polygon up and by given different heights for the  boarders of the two area I can achieve what I want. But  I dont know how to code it such that the split areas can be recombined to be used for applying the local government planning rules.