How to complete shapefile to road Shape?

[white500]

Hi,
I want to use the sdk to generate a road model. My raw data is a shapefile with the suffix ".shp". I know how to get the data in the shpfile, but I can't convert the lines in the shapefile into the required vertexCoords parameters. How is this process done, in which direction should I inquire, can you provide some cases in this regard, thank you very much!

[mistafunk]

Hi & thanks for your interest in our SDK.

Let me ask a few questions to better understand your situation:

• I assume you read the shapefile and want to use prt::InitialShapeBuilder for each feature to create a prt::InitialShape and then run a RPK on it, correct?
• Which library do you use to read the shapefile?
• Which feature type do you want to read (lines, polygons, ...)?
• What do you mean exactly with "I can't convert the lines"?

Best,
Simon

[white500]

Thank you for your reply. Here is my answer:

1. yes
2. gdal
3. lines
4. I want to generate roads using rpk rules

The official example is not road network example, or is the sdk only able to generate buildings.

I want to convert the line data in.shp to the data in the image. Can I do that?

[mistafunk]

The algorithm which creates the street shapes (i.e. the input geometry for the procedural rules) from center lines is not part of the CityEngine SDK (PRT), it is part of the CityEngine desktop app itself.

To generate road models with CE SDK (PRT) you would need to export the "start" shapes (as you have them in above screenshot) created by CityEngine (including UV coordinates). Then you read this geo in your app, assign the corresponding RPK and generate.

[white500]

Should I use the export wavefront obj

[mistafunk]

Apologies for the late reply.

As road rules typically make use of texture coordinates and UV split (see e.g. /ESRI.lib/rules/Streets/Street_Modern_Standard.cga) it is best to use a format which can handle multiple UV sets. So I recommend to use FBX at this point.

[white500]

Thanks for your reply. I'll try

[mistafunk]

Closing this for now - feel free to reopen in case there are problems.