Is it possible to add overhang to a pyramid roof and a shed Overhang?

[CarlaBernecoli]

Hi all.

 Is it possible to add overhang to a pyramid roof and a shed roof?

Like the overhang attribute in a Gable roof and  Hip roof.

Any suggestions?

[DevinLavigne]

This isn't always perfect, but it's a trick I use and works well - I scale up the roofplane and then center it.

/**
 * File:    Geonet_Overhang.cga
 * Created: 27 Sep 2017 15:58:51 GMT
 * Author:  Devin Lavigne
 */

version "2017.0"

#THIS IS A PERCENTAGE
@Range(1.0,2.0)
attr overHang=1

@Range("Shed","Pyramid")
attr roofStyle = "Shed"

@StartRule
Generate-->
     extrude(10)
     comp(f) {top:RoofPlane | side:Wall}

RoofPlane-->
     s('1*overHang,'1*overHang,'1) center(xy)
     BuildRoof
     
BuildRoof-->
     case roofStyle=="Shed": roofShed(10)
     else: roofPyramid(40)
     ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[LR]

Here's some ancient code I wrote once to make a "true" overhang, unfortunately it only works properly for buildings with equal width and depth due to the trig used to calculate the y-offset. You could always eyeball it, though. Or just change it to have a floating "tent" hovering close above the structure.

attr overHang = 5
attr roofAngle = 30

@StartRule 
Lot --> 
 extrude(1)
 s(20,10,20)
 center(xz)
 comp(f){top: Roof RoofOverhang| all: NIL.}
 
Roof -->
 roofPyramid(roofAngle)
 
RoofOverhang -->
 s(scope.sx+overHang*2, scope.sy+overHang*2,'1)
 roofPyramid(roofAngle)
 center(xz)
 split(y){overHang*tan(roofAngle): Overhang | ~1: NIL}
 
Overhang --> 
 t(0,-(overHang)*tan(roofAngle),0)
 comp(f){top: styleOverhang | bottom: NIL}‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍

[CarlaBernecoli]

Thanks!