How do I programmatically create building footprints and assign a height attribute to the lot in CityEngine?

Question

I want to create building footprints in City Engine programmatically and specify the density of lots in a specific region and assign a height attribute for the buildings to each lot? I need to achieve all this using CGA rules and python. Can anyone point me in the right direction? I'm new to CityEngine.

LR · Answer

This should help you getting started. It creates a 500x500 rectangle, gives it an attribute plus value, assigns a CGA rule and triggers model creation. Create the CGA rule ("extruder.cga") first. Python rect1x1 = [0,0,0, 0,0,500, 500,0,500, 500,0,0] shape = ce.createShape(None, rect1x1) ce.setAttribute(shape, 'Height', 50) shapeRule = "rules/extruder.cga" ce.setRuleFile(shape, shapeRule) ce.setStartRule(shape, 'Lot') ce.generateModels(shape, False) ce.waitForUIIdle()‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍ CGA attr Height = 0 @StartRule Lot --> extrude(Height)‍‍‍‍

DanPatterson_Retired · Answer

If you are new to the software, have you seen the help topics and help files.

Help -

The rules are covered within and can be searched