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Parametrisch ontwerpen met Python

Deze pagina beschrijft parametrisch ontwerpen in XFEM4U, en hoe je 3D-modellen maakt met Python. De resulterende modellen kunnen naar Speckle of naar XFEM4U worden gestuurd.

Voorbeeldbestanden staan op de Struct4U GitHub-repository.

Direct Commands

XFEM4U en XFrame2D beschikken over een functie genaamd DirectCommands. Daarmee kun je XFEM4U en XFrame2D openen vanuit een extern programma zoals Excel of Python.

Python

Dit voorbeeld maakt een 3D-model in XFEM4U met Python. Het gebruikt de open source Python-interpreter PyCharm Community Edition.

Het script maakt gebruik van de open source bibliotheek BuildingPy, met klassen als point, vector, line, polycurve, panel, beam, support en loads. Uit objecten van deze klassen wordt het 3D-model opgebouwd.

Voorbeeld

from bp_single_file import *
# bp_single_file is a single pythonfile required to create the 3D-model in XFEM4U.
# There is a dependency on Numpy.

project = BuildingPy("Struct4U Example file", "0")
# create a project with a name and project number

height = 3000
# In this case the height is a variable in this structure

# CREATE GRIDSYSTEM
gridinput = ["0 1000 1000", seqChar, "0 4x3600", seqNumber, "0"]
# This is the syntax for a gridsystem. It is the same syntax used in XFEM4U.

# CONCRETE BEAM
project.objects.append(Frame.byStartpointEndpoint(Point(0,0,0), Point(0,14400,0), Rectangle("350x500",350,500).curve, "350x500", 0, BaseConcrete))
project.objects.append(Frame.byStartpointEndpoint(Point(0,14400,0), Point(2000,14400,0), Rectangle("350x500",350,500).curve, "350x500", 0, BaseConcrete))
# Here we create 2 rectangular concrete beams, using coordinates and profiles.

# STEEL COLUMN
project.objects.append(Frame.byStartpointEndpointProfileNameShapevector(Point(2000,14400,0), Point(2000,14400,height), "HEA160", "HEA160", Vector2(0,0), 0, BaseSteel, "Frame"))
# Here we create a steel column. For a HEA160 you can use the syntax 'HEA 160', 'HE160A', 'hea 280' etc.
# Other steel profiles are HEB100, HEM100, IPE100, 100AA, HD260/54,1, DIN, DIE, DIR, DIL, UNP, B42.4/2.6, INP.
# For the full list of profiles see:
# https://github.com/3BMLabs/building.py/blob/main/library/profile_database/steelprofile.json
# Composite profiles are not yet implemented.

# STEEL FRAMES
x = 1000
y = 0
for i in range(5):
    project.objects.append(Frame.byStartpointEndpointProfileNameShapevector(Point(0,y,0), Point(0,y,height), "HEA180", "HEA180", Vector2(0,0), 90, BaseSteel, "Frame"))     # column
    project.objects.append(Frame.byStartpointEndpointProfileNameShapevector(Point(0,y,height), Point(x,y,height), "HEA180", "HEA180", Vector2(0,0), 0, BaseSteel, "Frame")) # beam
    x = x + 250
    y = y + 3600
# In this for loop we create the frames. The x and y coordinates increase with every step in the loop.

# PLATE IN XFEM4U
project.objects.append(Panel.byPolyCurveThickness(
    PolyCurve.byPoints(
        [Point(0,0,height),
         Point(0,14400,height),
         Point(2000,14400,height),
         Point(1000,0,height),
         Point(0,0,height)]),
    100,
    0,
    "Plate",
    BaseConcrete.colorint))
# The code above creates a plate based on 5 coordinates. The plate has a thickness.

# SEND PROJECT TO SPECKLE
# project.toSpeckle("31d9948b31")
# It is possible to visualize the result of this parametric structure in Speckle.

# CREATE XML-FILE
pathxml = "C:/TEMP/test4.xml"
# This is the path where the temporary file is saved.

createXFEM4UXML(project, pathxml, gridinput)
# We create an XML to load into XFEM4U.

OpenXMLXFEM4U(pathxml)
# This function will activate XFEM4U and open the parametric model.

Zie ook

  • XML - het XML-formaat dat dit script wegschrijft