topic Chamfer / bevel the edges of the geometry in ArcGIS CityEngine Questions

Chamfer / bevel the edges of the geometry

DavidOConnor — Thu, 14 Jun 2012 15:32:48 GMT

To make my building geometry look a bit more realistic, I'd like to chamfer / bevel all the edges in the model. This will just soften them slightly, and make them look just a bit more realistic when rendered... because the light reflects differently off chamfered corners, and few real-world objects have knife-sharp edges.

Is there a simple way to do this?

I suspect it involves comp(e), but I'm not sure after that....

Re: Chamfer / bevel the edges of the geometry

MatthiasBuehler1 — Fri, 15 Jun 2012 11:58:22 GMT

hi !

Lot -->  extrude(10)  comp(f) {side : Bevel}  Bevel -->  roofGable(50,0,0,true) # use the vertical edge = rotate roof // angle must be larger than 45 degs because of following comp(f)   split(y){0.005: comp(f) {top : color(1,0,0) X. | all : X.}  | ~1 : NIL}

Re: Chamfer / bevel the edges of the geometry

DavidOConnor — Sat, 11 Dec 2021 14:03:16 GMT

Thank you Matthias, excellent help 😄

I played around with your suggestion, and this is what I came up with to fit my needs.

I share it here (liberally commented) because someone less experienced might find it useful.

Lot -->
 innerRect    // ensure the lot is a square, for simplicity
 alignScopeToAxes(y)   // these two lines ensure that
 s('1,0,'1)    // the lot is extruded vertically (world axes, not the local axes)
 extrude(10)
 comp(f) {top: Bevel | side : Bevel} // splits out the individual faces

Bevel -->
 roofHip(45)     // each face becomes a hip roof, relative to the local axes 
 split(y){.1: comp(f) {bottom: NIL | all : Wall }}  // removes the bottom face (for efficiency)

Wall -->
 color(0,5,0)    // give it a pretty color :)
 Done.         // finished

[ATTACH=CONFIG]15266[/ATTACH]

Re: Chamfer / bevel the edges of the geometry

MatthiasBuehler1 — Mon, 18 Jun 2012 15:52:22 GMT

hey !

glad it works !

thanks for sharing ! :cool:

Re: Chamfer / bevel the edges of the geometry

DavidOConnor — Sat, 11 Dec 2021 14:03:19 GMT

doh, I was implementing bevelled edges in LOD 0 of my city, and I realized that I forgot to take out the extra bit:

Lot -->
 innerRect    // ensure the lot is a square, for simplicity
 alignScopeToAxes(y)   // these two lines ensure that
 s('1,0,'1)    // the lot is extruded vertically (world axes, not the local axes)
 extrude(10)
 comp(f) {top: Bevel | side : Bevel} // splits out the individual faces

Bevel -->
 roofHip(45)     // each face becomes a hip roof,
 split(y){.1: comp(f) {bottom: NIL | all : Wall }  | ~1:NIL}  // removes the bottom face (for efficiency), then removes the excess

Wall -->
 color(0,5,0)    // give it a pretty color :)
 Done.         // finished