Doing UV split on roundabout Street shape

AndreasHeldt

Hi,

I'm trying to get a UV split on roundabouts working, but apparently CE messes up my geometry. Originally I work in a bigger rule file, but I could reproduce it with this simple snippet:

version "2012.1"  Street -->  split(v, unitSpace, 0)  {   3: TestShape   | 3: TestShape  }   TestShape -->  tileUV(0, 1, 1)  texture("builtin:uvtest.png")

When applied to a roundabout Street shape, I get the following model:

[ATTACH=CONFIG]22125[/ATTACH]

This is it with the source shapes visible, too:

[ATTACH=CONFIG]22126[/ATTACH]

The wireframe looks right, but the geometry is messed up (see the z-fighting in the screenshots). When I export the model and view it, the problem is more visible:

[ATTACH=CONFIG]22124[/ATTACH]

Any ideas how I could work around this? It's really annoying because I try to split the shape into individual driving lanes and adding features like separator lines.

ce-messed-up-roundabout-as-fbx.png

ce-messed-up-roundabout-with-shapes.png

ce-messed-up-roundabout.png

Anonymous User

Original User: matthiasbuehler

hey ..

here's a fix.

Street -->    comp(f) {all :    split(v, unitSpace, 0)   {    3: TestShape    | 3: TestShape    | ~1 : X.   }  }   TestShape -->  tileUV(0, 1, 1)  texture("builtin:uvtest.png")

you see that you go first to each individual segment shape, then use the uv-split.

the issue is here that if a 'closed shape' is detected, the hole is filled automatically. for some usages, this is wanted, in this case here it is not wanted. we'll have to rethink the heuristics on this. I'll create a ticket.

thanks for reporting this ! very interesting case !

Matt