Run Rhino command from python script

Scripting
1

Hi there!

I can run command on picked object from my python script:

import rhinoscriptsyntax as rs

#rs.Command(“WaterlineElevation=9.2 Symmetric=Yes Longitude=X”)

result = rs.Command("_Hydrostatics ")

I have no idea how to catch results from this command:

Volume Displacement = …
Center of Buoyancy = …
Wetted Surface Area = …
Waterline Length = …
Maximum Waterline Beam = …
Water Plane Area = …
Center of Floatation = …

Can anyone give me a hint to return results into my python script.

I also like to run this comamnd for the same object several times with different elevation.
Without selecting the same object again.

Thanks and regards, vzav

2

Hi @Vojko, you could route the results to the clipboard, then print the text for each level:

#! python 2
import rhinoscriptsyntax as rs

def DoSomething():
    
    message = "Select surfaces or polysurfaces for hydrostatics"
    obj_ids = rs.GetObjects(message, 8+16, True, True, True)
    if not obj_ids: return
    
    cmd = "_-Hydrostatics "
    cmd += "_WaterlineElevation {} "
    cmd += "_Symmetric=_Yes "
    cmd += "_Longitude=X _Enter "
    cmd += "_Clipboard "
    
    levels = [-0.25, 0.0, 0.25]
    for level in levels:
        rc = rs.Command(cmd.format(level), False)
        if rc:
            text = rs.ClipboardText()
            print "Results for level: {}\n{}".format(level, text)
    
DoSomething()

it should print someting like below for each level:

Results for level: -0.25
Volume Displacement = 14398.3
Center of Buoyancy = -1.33073, 1.61587, -6.00779
Wetted Surface Area = 2900.65
Waterline Length = 27.919
Maximum Waterline Beam = 42.9205
Water Plane Area = 1198.3
Center of Floatation = -1.33073, 1.61587,0
…

Do you need the results as usable variables or just as text ?
_
c.

1 Like
3

Yes, that is my intention. To use above results for some calculations in python.
Thanks for quick answer!

4

Hi @Vojko, see if below example helps.

PrintHydrostatics.py (1.9 KB)

_
c.

5

HI clemet,

it helps a lot, thanks!