ifcopenshell.api.alignment.create_alignment_from_csv

Module Contents

ifcopenshell.api.alignment.create_alignment_from_csv.create_alignment_from_csv(file: ifcopenshell.file, filepath: str) → ifcopenshell.entity_instance

Creates an alignment from PI data stored in a CSV file. Only the business logic entities are creaed. Use create_geometric_representation() to create the geometric entities.

The format of the file is:

X1,Y1,R1,X2,Y2,R2 … Xn-1,Yn-1,Rn-1,Xn,Yn

D1,Z1,L1,D2,Z2,L2 … Dn-1,Zn-1,Ln-1,Dn,Zn

D1,Z1,L1,D2,Z2,L2 … Dn-1,Zn-1,Ln-1,Dn,Zn

…

where:

X,Y are PI coordinates

R is the horizontal circular curve radius

D,Z are VPI coordinates as “Distance Along”,”Elevation”

L is the horizontal length of a parabolic vertical transition curve

R1 and Rn, as well as L1 and Ln are placeholders and not used. They are recommended to have values of 0.0.

R2 and Rn-2 are the radii of the first and last horizontal curves.

L2 and Ln-2 are the length of the first and last vertical curves.

The CSV file contains one horizontal alignment, zero, one, or more vertical alignments

Parameters:

filepath – path the to CSV file

Returns:

IfcAlignment