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Macro Airfoil Import & Scale

{{Macro |Name=Macro Airfoil Import & Scale |Icon=Macro_Airfoil_Import_&Scale.png |Description=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 version disposable). |Author=quick61 |Version=2.1.2 |Date=2019-07-16 |FCVersion=All |Download=[https://www.freecadweb.org/wiki/images/0/0c/Macro_Airfoil_Import%26_Scale.png ToolBar Icon] }}

Description

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 also Common Airfoil Data Import

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.

File browser window for importing .dat airfoil files

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.

Chord length dialog for import and scale macro v1.5

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.

Version 2 Airfoil Import and scale dialog with choice of DWire or BSpline

The Macros

Latest

The latest version of the macro is to be found at AirfoilImportAndScale.FCMacro but the easiest way to install this macro is through the Addon Manager.

Version 2.1.2

ToolBar icon

Macro_Airfoil_Import_&_Scale.FCMacro

{{MacroCode|code=

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 = "http://forum.freecadweb.org/viewtopic.php?f=22&t=5554" Wiki = "http://www.freecadweb.org/wiki/Macro_Airfoil_Import_%26_Scale" Icon = 'https://www.freecadweb.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()

}}

Version 1.5

Macro_Airfoil_Import_&_Scale.FCMacro

{{MacroCode|code=

# #

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()

}}

Editing The Default Selection

If you primarily wish to have your imported and scaled airfoils made with BSplines rather than DWires, the Marco may be edited to default to the Bspline. This is done by editing the line - {{ExampleCode|example= self.radio1.setChecked(True) }}

  • and changing it to - {{ExampleCode|example= self.radio2.setChecked(True) }} A note on this is included within the text of the macro.

Version 2

{{MacroCode|code=

# #

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)

{{MacroCode|code=

# #

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() }}

Link

Discussion on Forum

UIUC Applied Aerodynamics Group Departement of Aerospace Engineering

documentation index > Macro Airfoil Import & Scale