Extracting Start and End Points from Lines for RSA API by using python

[ugur_yavan_61]

Hello everyone,

I have a list of lines for which I need to obtain the start and end point coordinates. My goal is to create these lines in RSA using the RSA API. Below is the logic I’m planning to use:

# Import the RSA API libraries
import clr
clr.AddReference('RobotOM')
import RobotOM

# Function to translate Dynamo lines to RSA nodes and bars
def translate_line_to_rsa(line, rsa_model):
    start_point = line.StartPoint
    end_point = line.EndPoint
    
    # Create nodes at the start and end of the line
    start_node_id = rsa_model.Project.Structure.Nodes.Create(start_point.X, start_point.Y, start_point.Z)
    end_node_id = rsa_model.Project.Structure.Nodes.Create(end_point.X, end_point.Y, end_point.Z)
    
    # Create a bar between the start and end nodes
    bar_id = rsa_model.Project.Structure.Bars.Create(start_node_id, end_node_id)
    
    # Set the section for the bar (example section name)
    rsa_model.Project.Structure.Bars.Get(bar_id).SetSection('EXAMPLE_SECTION_NAME')
    
    return bar_id

# Connect to RSA
robot_app = RobotOM.RobotApplicationClass()
robot_app.Interactive = False
robot_project = robot_app.Project
robot_structure = robot_project.Structure

# Assume 'lines' is a list of Dynamo lines passed into the script
for line in IN[0]:  # IN[0] is where Dynamo inputs are accessed
    translate_line_to_rsa(line, robot_project)

# Finalize changes in RSA
robot_structure.FinishEdition()

# Return something if needed
OUT = "Script completed"

However, I believe there is no command like line.StartPoint . Can anyone suggest an alternative or provide guidance on this matter?"

[bharat.minocha]

@ugur_yavan_61 Quickstart Guide for Dynamo in RSA 2023 - Robot Structural Analysis - Dynamo (dynamobim.com)

Did u read this ??

i don’t have the RSA documentation but in revit api startpoint and end point work in this manner with this method of “GetEndPoint” , Here if need startpoint passing indes as 0 and 1 for the endpoint so u could see if there’s something similar to this exist in RSA Api.

Thanks,
BM

[ugur_yavan_61]

@bharat.minocha

revit api

Thank you for your reply.
Is there any way to do it by using Autodesk design script Geometry ? We can use the code in code block as in the figure. Can’t we use same command in python ?

[bharat.minocha]

hey @ugur_yavan_61

@ugur_yavan_61

Can’t we use same command in python

Here i have brokendown what u asked for in multiple scenarios and kept 3 ways however the scenario u encounter during execution, please go though it and hopefully it resolves your query and help u meet your goal

Thanks
BM