Split at 'Joint' (Street Network)

TD — Tue, 10 May 2016 04:22:45 GMT

Hi,

I am using a Street Network to create 3D models which are not streets. The vertices along the imported lines have different elevations.

Part of the process involves to apply a 'split(z)' on the shapes generated from the Street Network. Unfortunetly, the split seems to offset the models in some parts.

I have identified some problems at the 'Joint':

zoomed in:

The rule looks like this (I do not use a @StartRule as I let CE find out which rule to start with, Street, Joint, Crossing, etc):

Joint -->

split(z){'0.5:C | '0.5:C}

C -->

extrude(world.y,20)

Does anyone know how to avoid the split to offset from the line direction ?

Thank you.

Re: Split at 'Joint' (Street Network)

CherylLau — Tue, 10 May 2016 08:19:40 GMT

If I understand correctly, you would like to split the shape as if you were making street lanes. For this, you could split in the v direction. Streets have u coordinates that follow the street and v coordinates that cross the street perpendicularly. (This is uv set 0.)

split(v, uvSpace, 0) { '0.5 : C

| '0.5 : C }

Here's the documentation on the uv coordinates on street shapes:

Street and Intersection Shape UVs

Here's the documentation on uv splits (uv split example on bottom of page):

split Operation

topic Re: Split at 'Joint' (Street Network) in ArcGIS CityEngine Questions

Split at 'Joint' (Street Network)

Re: Split at 'Joint' (Street Network)