How to access multiple shp files in a folder "selet objects"->"Shapes"->"union shapes" in sequence

hoya

I am curious about the script that sequentially loads multiple shp files in the folder, selects the upper layer as shown in picture 1, selects "selet objects", accesses the top menu "Shapes" as shown in picture 2, and executes "union shapes"

( picture 1)

( picture 2)

 

plfontes

Hi @hoya ,

This script should do what you described. It assumes though that:

• the SHP files are within your project's folder
• the SHP files are numerically sequential
• your scene is empty before running the script

you need to change these variables to fit your project:

initialFileNumber
finalFileNumber
fileLocation
fileNameRoot

Here's the script:

'''
Created on Dec 13, 2022

@author: Plfontes
'''
from scripting import *

# get a CityEngine instance
ce = CE()

initialFileNumber = 1 # the lowest/first number after the immutable part of the filename  from all your SHP files
finalFileNumber = 5 # the last number after the immutable part of the filename from all your SHP files
fileLocation = "path/to/your/SHP/files/" # where the SHP file are locate on your CE project folders
fileNameRoot = "rootPartOfYourFileName" # the first part of your SHP file list that is immutable

# import the SHP files into the scene
def importSHPStack():
    i = initialFileNumber
    while i <= finalFileNumber:
        settings = SHPImportSettings()
        ce.importFile(ce.toFSPath(fileLocation+fileNameRoot+str(i)+".shp"), settings)
        i += 1
        
# run the union shape command
def unionShapes():
    objects = ce.getObjectsFrom(ce.scene, ce.isShape)
    for o in objects:
        shape = ce.unionShapes(objects)
        
def deleteEmptyShapeLayers():
    shapeLayers = ce.getObjectsFrom(ce.scene, ce.isShapeLayer)
    for s in shapeLayers:
        if len(ce.getObjectsFrom(s, ce.isShape)) == 0:
            ce.delete(s)

if __name__ == '__main__':
    importSHPStack()
    unionShapes()
    deleteEmptyShapeLayers()

 

Hope this helps.