Calling C++ DLL in Python

15951991225 · November 29, 2019, 12:00pm

I want to know how to call C++ DLL in python. I write a sample C++ DLL.
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I want to call CallDll.dll on python.

I do not know what to do next? can someone give me some suggestions? Thank you!

AndersDeleuran · November 29, 2019, 12:21pm

This might help:

github.com

AndersDeleuran/ShapeOpGHPython/blob/master/src/ShapeOpConstraintSolver.py#L18


        ConstraintSigs: Signatures used for adding and editing constaints.
        Points: Points which the solver will operate on. ConstraintSigs should be constructed using the indices of this list.
        Settings: A list of settings which will be used to set up and run the solver..
    Returns:
        Iterations: The number of iterations the solver has run.
        ConstraintCount: The total number of contraints which are being solved.
        Points: The constrained points after solving.
"""


import Rhino as rc
import ctypes as ct
import Grasshopper as gh
from scriptcontext import sticky as st
so = ct.cdll.LoadLibrary("ShapeOp.0.1.0.dll")


# Set component name
ghenv.Component.Name = "ShapeOpConstraintSolver"
ghenv.Component.NickName = "SOSolver"


def makeSoSolver(points):

Also, we don’t use ; in Python

15951991225 · November 29, 2019, 1:30pm

Thank you very much! AndersDeleuran

TomTom · November 29, 2019, 9:56pm

Are you aware of the meaning of extern c? Its actually used to correctly distinguish and link between c and c++ code, which further indicates that everything within an extern c function is meant to be c code?! Using a c++ dll is just a workaround and rather meant to connect c code (and not c++ code) with DotNet/IronPython