Approach to Modelling Kerb / Footway (Corridor / Surface Template) Interface

RE: Approach to Modelling Kerb / Footway (Corridor / Surface Template) Interface

Jan Blaasse — Thu, 16 Jun 2022 16:58:17 GMT

Yes, create both front and back using whatever method fits the problem, but make sure you can grab geometry from it to create a surface.

RE: Approach to Modelling Kerb / Footway (Corridor / Surface Template) Interface

Ken Bagnall — Thu, 16 Jun 2022 16:46:53 GMT

I assume you mean to create geometry, horizontally and vertically? Are you referring to both the front and back of footway?

One application of this would be, for example, a roundabout splitter island, where I would run the kerb around the channel and use the back top of kerb to triangulate into something I can Surface Template to 'fill in' the island.

E.g.:

Another example is where a simple Corridor along a channel alone won't do the trick e.g. the footway detailing shown below, so you need to use geometry instead and break it up more:

RE: Approach to Modelling Kerb / Footway (Corridor / Surface Template) Interface

Jan Blaasse — Thu, 16 Jun 2022 16:34:55 GMT

Ken,

Usually I would like to control the terrain where I construct a footway by modelling both edges to make sure the top surface is smooth enough.
Alternatively you could design one edge using the template and constructing the other edge of the terrain by draping a geometry onto the existing ground.

Jan

RE: Approach to Modelling Kerb / Footway (Corridor / Surface Template) Interface

Ken Bagnall — Thu, 16 Jun 2022 16:28:10 GMT

Makes sense, we will give it ago to see how it goes.

I suppose as long as the Terrain isn't too complex close to the back of kerb (which it shouldn't be) and the top footway point at the red line is set to target a Terrain is should work.

Thanks,

RE: Approach to Modelling Kerb / Footway (Corridor / Surface Template) Interface

Jan Blaasse — Thu, 16 Jun 2022 16:22:38 GMT

What Mary suggested, including a part of the footway into the template is the easier to understand solution.
It will give you the option to model the components as they should interact with each other, not creating any overlaps. As soon as there is no more interaction with components like the concrete, you can switch to using a surface template to fill in the gap that remains.

Nowhere in the "modelling rules" does it say you have to split the design where two different components connect. You will get the same output when you split the design partway into a component, as long as the connecting part uses the same dimensions.

The image below is your example, where the red line indicates a possible split in design methods.

For the example below, you can use the main template or a linear template to model the kerb part including a small section of the footway.

Jan

RE: Approach to Modelling Kerb / Footway (Corridor / Surface Template) Interface

MaryB — Thu, 16 Jun 2022 13:36:25 GMT

My initial thought might be to include that small footway "ledge" into the main template, with a display rule to determine if it is or is not needed. Then pick up the rest of the footway from the edge of that.

The other option is to build that footpath template to include that ledge.

But there are far more experienced people here than I. I look forward to seeing what they suggest.