Macro Airfoil Import & Scale

How To Use - Version 1.5

Select The File

Running the Macro will first present the user with a file browser that will allow you to select the desired airfoil .dat file. Browse to where you have saved the airfoil file, select it and press Open.

Enter Chord Length

Once the airfoil file has been selected, a new dialog will appear asking for a chord length. Any length may be entered, in millimeters. Once your desired length is entered, the Macro will produce a Draft Wire (DWire) following the points described in the previously selected .dat airfoil file at the scale you entered for the chord length.

The Airfoil, properly scaled, should now be ready for use in your project.

How To Use - Version 2

File selection is the same as version 1.5. With version 2 you now have the choice to either have the resulting airfoil made with a Draft Wire (DWire) or a Basic Spline (BSpline). As with version 1.5, you enter the desired chord length. Additionally you can now select which type of foil you want. Simply click on the BSpline radio button or leave as is for for the default DWire.

The Macros

Version 1.5

Macro_Airfoil_Import_&_Scale.FCMacro

# # # #
#
# AIRFOIL IMPORT & SCALE v1.5
# 
# Imports and scales an Airfoil in the form of a Draft Wire (DWire) 
#
# # # #


from PySide import QtCore, QtGui
from PySide.QtGui import QLineEdit
import FreeCAD, FreeCADGui, Draft
import importAirfoilDAT

# Select .dat airfoil data file to be imported

filename = QtGui.QFileDialog.getOpenFileName(QtGui.qApp.activeWindow(),'Open An Airfoil File','*.dat')

class p():

    def proceed(self):
            try:
                
                # This produces a scaled Airfoil with a DWire

                scalefactor=float(self.s1.text())
                f1=str(filename)
                importAirfoilDAT.insert(f1,"Unnamed")
                Draft.scale(App.ActiveDocument.ActiveObject,delta=App.Vector(scalefactor,scalefactor,scalefactor),center=App.Vector(0,0,0),legacy=True)
            
            except:
                FreeCAD.Console.PrintError("Error, not a valid .dat file\n")

            self.close()

    def close(self):
        self.dialog.hide()

    def __init__(self):
        self.dialog = None
        self.s1 = None

        # Make dialog box and get the scale size

        self.dialog = QtGui.QDialog()
        self.dialog.resize(350,100)
        self.dialog.setWindowTitle("Airfoil Import & Scale")
        la = QtGui.QVBoxLayout(self.dialog)
        t1 = QtGui.QLabel("Chord Length")
        la.addWidget(t1)
        self.s1 = QtGui.QLineEdit()
        la.addWidget(self.s1)

        # Add OK / Cancel buttons

#ori        okbox = QtGui.QDialogButtonBox(self.dialog)
#ori        okbox.setOrientation(QtCore.Qt.Horizontal)
#ori        okbox.setStandardButtons(QtGui.QDialogButtonBox.Cancel -PIPE- QtGui.QDialogButtonBox.Ok)
#        modify original code for install with addon-install cause -PIPE- 05-12-2016 FC 0.16

        okbox = QtGui.QDialogButtonBox(self.dialog)
        okbox.setOrientation(QtCore.Qt.Horizontal)
        okbox.setStandardButtons(QtGui.QDialogButtonBox.Ok)

        cancelbox = QtGui.QDialogButtonBox(self.dialog)
        cancelbox.setOrientation(QtCore.Qt.Horizontal)
        cancelbox.setStandardButtons(QtGui.QDialogButtonBox.Cancel)
        cancelbox.move(0,62)

        la.addWidget(okbox)
        QtCore.QObject.connect(okbox, QtCore.SIGNAL("accepted()"), self.proceed)
        QtCore.QObject.connect(cancelbox, QtCore.SIGNAL("rejected()"), self.close)
        QtCore.QMetaObject.connectSlotsByName(self.dialog)
        self.dialog.show()
        self.dialog.exec_()

p()

Version 2

# # # #
#
# AIRFOIL IMPORT & SCALE v2.
# 
# Imports and scales an Airfoil in the form of a Draft Wire (DWire) or Basic Spline (BSpline)
#
# For FreeCAD Versions = or > 0.14 Revision 3077
#
# Works best with OCC/OCE = or > 6.7
#
# # # #


from PySide import QtCore, QtGui
from PySide.QtGui import QLineEdit, QRadioButton
import FreeCAD, FreeCADGui, Draft
import importAirfoilDAT

# Select .dat airfoil data file to be imported

filename = QtGui.QFileDialog.getOpenFileName(QtGui.qApp.activeWindow(),'Open An Airfoil File','*.dat')

class p():

    def proceed(self):
        if self.radio1.isChecked():
            try:
                
                # This produces a scaled Airfoil with a DWire

                scalefactor=float(self.s1.text())
                f1=str(filename)
                importAirfoilDAT.insert(f1,"Unnamed")
                Draft.scale(App.ActiveDocument.ActiveObject,delta=App.Vector(scalefactor,scalefactor,scalefactor),center=App.Vector(0,0,0),legacy=True)
            
            except:
                FreeCAD.Console.PrintError("Error, not a valid .dat file\n")

            self.close()

        if self.radio2.isChecked():
            try:

                # This produces a scaled Airfoil with a BSpline

                scalefactor=float(self.s1.text())
                f1=str(filename)
                importAirfoilDAT.insert(f1,"Unnamed")
                points = FreeCAD.ActiveDocument.ActiveObject.Points
                Draft.makeBSpline(points, closed=True)
                Draft.scale(App.ActiveDocument.ActiveObject,delta=App.Vector(scalefactor,scalefactor,scalefactor),center=App.Vector(0,0,0),legacy=True)
                App.getDocument("Unnamed").removeObject("DWire")

            except:
                FreeCAD.Console.PrintError("Error, not a valid .dat file\n")

            self.close()

    def close(self):
        self.dialog.hide()


    def __init__(self):
        self.dialog = None
        self.s1 = None


        # Make dialog box and get the scale size

        self.dialog = QtGui.QDialog()
        self.dialog.resize(350,100)
        self.dialog.setWindowTitle("Airfoil Import & Scale")
        la = QtGui.QVBoxLayout(self.dialog)
        t1 = QtGui.QLabel("Chord Length")
        la.addWidget(t1)
        self.s1 = QtGui.QLineEdit()
        la.addWidget(self.s1)

        # Add radio buttons to select between DWire and BSpline

        self.radio1 = QRadioButton("Make DWire")
        self.radio2 = QRadioButton("Make BSpline")

            # set default to DWire & make radio buttons - Change self.radio1.setChecked(True) to
            # self.radio2.setChecked(True) to set BSpline as default

        self.radio1.setChecked(True)
        la.addWidget(self.radio1)
        la.addWidget(self.radio2)

        # Add OK / Cancel buttons

        okbox = QtGui.QDialogButtonBox(self.dialog)
        okbox.setOrientation(QtCore.Qt.Horizontal)
        okbox.setStandardButtons(QtGui.QDialogButtonBox.Cancel|QtGui.QDialogButtonBox.Ok)
        la.addWidget(okbox)
        QtCore.QObject.connect(okbox, QtCore.SIGNAL("accepted()"), self.proceed)
        QtCore.QObject.connect(okbox, QtCore.SIGNAL("rejected()"), self.close)
        QtCore.QMetaObject.connectSlotsByName(self.dialog)
        self.dialog.show()
        self.dialog.exec_()

p()

Version 2.1

Updated by mangtronix to use PySide instead of PyQt (used in older versions of FreeCAD).

# # # #
#
# AIRFOIL IMPORT & SCALE v2.1
# 
# Imports and scales an Airfoil in the form of a Draft Wire (DWire) or Basic Spline (BSpline)
#
# For FreeCAD Versions = or > 0.14 Revision 3703
#
# Works best with OCC/OCE = or > 6.7
#
# # # #
 
 
from PySide import QtCore, QtGui
from PySide.QtGui import QLineEdit, QRadioButton
import FreeCAD, FreeCADGui, Draft
import importAirfoilDAT
 
# Select .dat airfoil data file to be imported
 
# PySide returns a tuple (filename, filter) instead of just a string like in PyQt
filename, filefilter = QtGui.QFileDialog.getOpenFileName(QtGui.qApp.activeWindow(),'Open An Airfoil File','*.dat')

class p():
 
    def proceed(self):
        global filename
        if self.radio1.isChecked():
            #if True:
            try:
 
                # This produces a scaled Airfoil with a DWire
 
                scalefactor=float(self.s1.text())
                f1=str(filename)
                importAirfoilDAT.insert(f1,"Unnamed")
                Draft.scale(App.ActiveDocument.ActiveObject,delta=App.Vector(scalefactor,scalefactor,scalefactor),center=App.Vector(0,0,0),legacy=True)
 
            except Exception, e:
                FreeCAD.Console.PrintError("Error, not a valid .dat file\n")
 
            self.close()
 
        if self.radio2.isChecked():
            try:
 
                # This produces a scaled Airfoil with a BSpline
 
                scalefactor=float(self.s1.text())
                f1=str(filename)
                importAirfoilDAT.insert(f1,"Unnamed")
                points = FreeCAD.ActiveDocument.ActiveObject.Points
                Draft.makeBSpline(points, closed=True)
                Draft.scale(App.ActiveDocument.ActiveObject,delta=App.Vector(scalefactor,scalefactor,scalefactor),center=App.Vector(0,0,0),legacy=True)
                App.getDocument("Unnamed").removeObject("DWire")
 
            except:
                FreeCAD.Console.PrintError("Error, not a valid .dat file\n")
 
            self.close()
 
    def close(self):
        self.dialog.hide()
 
 
    def __init__(self):
        self.dialog = None
        self.s1 = None
 
 
        # Make dialog box and get the scale size
 
        self.dialog = QtGui.QDialog()
        self.dialog.resize(350,100)
        self.dialog.setWindowTitle("Airfoil Import & Scale")
        la = QtGui.QVBoxLayout(self.dialog)
        t1 = QtGui.QLabel("Chord Length")
        la.addWidget(t1)
        self.s1 = QtGui.QLineEdit()
        la.addWidget(self.s1)
 
        # Add radio buttons to select between DWire and BSpline
 
        self.radio1 = QRadioButton("Make DWire")
        self.radio2 = QRadioButton("Make BSpline")
 
            # set default to DWire & make radio buttons - Change self.radio1.setChecked(True) to
            # self.radio2.setChecked(True) to set BSpline as default
 
        self.radio1.setChecked(True)
        la.addWidget(self.radio1)
        la.addWidget(self.radio2)
 
        # Add OK / Cancel buttons
 
        okbox = QtGui.QDialogButtonBox(self.dialog)
        okbox.setOrientation(QtCore.Qt.Horizontal)
        okbox.setStandardButtons(QtGui.QDialogButtonBox.Cancel|QtGui.QDialogButtonBox.Ok)
        la.addWidget(okbox)
        QtCore.QObject.connect(okbox, QtCore.SIGNAL("accepted()"), self.proceed)
        QtCore.QObject.connect(okbox, QtCore.SIGNAL("rejected()"), self.close)
        QtCore.QMetaObject.connectSlotsByName(self.dialog)
        self.dialog.show()
        self.dialog.exec_()
 
p()

Version 2.1.2

ToolBar icon

Macro_Airfoil_Import_&_Scale.FCMacro

# This Macro, when run, will first provide the user with a file browser to
# locate and select a .dat airfoil text file. Once selected, a chord length is
# entered and upon pressing the OK button, a properly scaled airfoil is
# produced. There are two versions provided here. Version 1.5 should work on
# FreeCAD versions, 0.13 stable as well as all 0.14 versions. Version 2 should
# only be used with FreeCAD versions equal to or greater than 0.14 3077 and
# will work best with versions built with OCE/OCC versions 6.7 or greater (See
# the Wiki page for all available version).
#
# (c) quick61

__Name__ = 'Airfoil Import and Scale'
__Comment__ = 'Imports and scales an Airfoil in the form of a Draft Wire (DWire) or Basic Spline (BSpline)'
__Author__ = "quick61"
__Version__ = '2.1.2'
__Date__ = '2019-07-16'
__License__ = ''
__Web__ = "https://forum.freecad.org/viewtopic.php?f=22&t=5554"
__Wiki__ = "https://www.freecad.org/wiki/Macro_Airfoil_Import_%26_Scale"
__Icon__ = 'https://www.freecad.org/wiki/images/0/0c/Macro_Airfoil_Import_%26_Scale.png'
__Help__ = ''
__Status__ = 'stable'
__Requires__ = 'Freecad >= 0.14.3706'
__Communication__ = ''
__Files__ = ''


import FreeCAD as app
import PySide
from PySide import QtCore, QtGui
from PySide.QtGui import QLineEdit, QRadioButton
import Draft
import importAirfoilDAT


# Select .dat airfoil data file to be imported

# PySide returns a tuple (filename, filter) instead of just a string like in PyQt

global filename
global nameFile

try:
    filename, filefilter = QtGui.QFileDialog.getOpenFileName(QtGui.qApp.activeWindow(), 'Open An Airfoil File', '*.dat')
except Exception:
    param = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Macro")# macro path
    path = param.GetString("MacroPath","") + "/"                        # macro path
    filename, filefilter = PySide.QtGui.QFileDialog.getOpenFileName(None, "Open An Airfoil File", path, "*.dat")

nameFile = filename.split("/")[-1][:-4]

class AirfoilImporterAndScaler():
    def __init__(self):
        self.dialog = None
        self.s1 = None

        # Make dialog box and get the scale size
        self.dialog = QtGui.QDialog()
        self.dialog.resize(350,100)
        self.dialog.setWindowTitle("Airfoil Import & Scale")
        la = QtGui.QVBoxLayout(self.dialog)
        t1 = QtGui.QLabel("Chord Length")
        la.addWidget(t1)
        self.s1 = QtGui.QLineEdit()
        la.addWidget(self.s1)

        # Add radio buttons to select between DWire and BSpline
        self.radio1 = QtGui.QRadioButton("Make DWire")
        self.radio2 = QtGui.QRadioButton("Make BSpline")

        # set default to DWire & make radio buttons - Change self.radio1.setChecked(True) to
        # self.radio2.setChecked(True) to set BSpline as default

        self.radio1.setChecked(True)
        la.addWidget(self.radio1)
        la.addWidget(self.radio2)

        # Add OK / Cancel buttons
        okbox = QtGui.QDialogButtonBox(self.dialog)
        okbox.setOrientation(QtCore.Qt.Horizontal)
        okbox.setStandardButtons(QtGui.QDialogButtonBox.Cancel|QtGui.QDialogButtonBox.Ok)
        la.addWidget(okbox)
        QtCore.QObject.connect(okbox, QtCore.SIGNAL("accepted()"), self.proceed)
        QtCore.QObject.connect(okbox, QtCore.SIGNAL("rejected()"), self.close)
        QtCore.QMetaObject.connectSlotsByName(self.dialog)
        self.dialog.show()
        self.dialog.exec_()



    def proceed(self):
        global filename
        global nameFile

        if self.radio1.isChecked():
            try:
                # This produces a scaled Airfoil with a DWire
                scalefactor=float(self.s1.text())
                f1=str(filename)
                importAirfoilDAT.insert(f1,"Unnamed")
                try:
                    Draft.scale(App.ActiveDocument.ActiveObject,delta=App.Vector(scalefactor,scalefactor,scalefactor),center=App.Vector(0,0,0),legacy=True)
                except Exception:
                    Draft.scale(App.ActiveDocument.ActiveObject,scale=App.Vector(scalefactor,scalefactor,scalefactor),center=App.Vector(0.0,0.0,0.0),copy=False)
                
                App.ActiveDocument.ActiveObject.Label = nameFile + "_(DWire)"

            except Exception as e:
                app.Console.PrintError("Error, not a valid .dat file\n")

        if self.radio2.isChecked():
            try:
                # This produces a scaled Airfoil with a BSpline
                scalefactor=float(self.s1.text())
                f1=str(filename)
                importAirfoilDAT.insert(f1,"Unnamed")
                points = app.ActiveDocument.ActiveObject.Points
                App.getDocument("Unnamed").removeObject(App.ActiveDocument.ActiveObject.Name)
                Draft.makeBSpline(points, closed=True)
                try:
                    Draft.scale(App.ActiveDocument.ActiveObject,delta=App.Vector(scalefactor,scalefactor,scalefactor),center=App.Vector(0,0,0),legacy=True)
                except Exception:
                    for i in range(len(points)):
                        Draft.scaleVertex(App.ActiveDocument.ActiveObject, i, App.Vector(scalefactor,scalefactor,scalefactor), App.Vector(0.0,0.0,0.0))

                App.ActiveDocument.ActiveObject.Label = nameFile + "_(BSpline)"

            except:
                app.Console.PrintError("Error, not a valid .dat file\n")

        try:    
            # delete the directory created by importAirfoilDAT
            for obj in App.ActiveDocument.Objects:
                if (obj.TypeId == "App::DocumentObjectGroup") and (obj.Name == nameFile):
                    App.getDocument("Unnamed").removeObject(nameFile)
        except Exception:
            None

        self.close()    # close the window

    def close(self):
        self.dialog.hide()


AirfoilImporterAndScaler()