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FSNuts.py
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FSNuts.py
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# -*- coding: utf-8 -*-
###################################################################################
#
# FSNuts.py
#
# Copyright 2015 Shai Seger <shaise at gmail dot com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301, USA.
#
#
###################################################################################
# NOTE!! this command is left for backward compatibility, Screw_Maker.py nuts are now used.
from FreeCAD import Gui
from FreeCAD import Base
import FreeCAD, FreeCADGui, Part, os, math
__dir__ = os.path.dirname(__file__)
iconPath = os.path.join( __dir__, 'Icons' )
import FastenerBase
from FastenerBase import FSBaseObject
import ScrewMaker
screwMaker = ScrewMaker.Instance()
###################################################################################
# Standard Metric Hex nuts
NutDiamCodes = ['Auto', 'M1.6', 'M2', 'M2.5', 'M3', 'M3.5', 'M4', 'M5', 'M6', 'M8', 'M10', 'M12', 'M14', 'M16', 'M20', 'M24', 'M30', 'M36']
MHexNutTable = {
# S, M, d
'M1.6':(3.2, 1.3, 1.25),
'M2': (4.0, 1.6, 1.6),
'M2.5':(5.0, 2.0, 2.05),
'M3': (5.5, 2.4, 2.5),
'M3.5':(6.0, 2.8, 2.9),
'M4': (7.0, 3.2, 3.3),
'M5': (8.0, 4.7, 4.2),
'M6': (10.0, 5.2, 5.0),
'M8': (13.0, 6.8, 6.8),
'M10': (16.0, 8.4, 8.5),
'M12': (18.0, 10.8, 10.2),
'M14': (21.0, 12.8, 12.0),
'M16': (24.0, 14.8, 14.0),
'M20': (30.0, 18.0, 15.0),
'M24': (36.0, 21.5, 21.0),
'M30': (46.0, 25.6, 26.5),
'M36': (55.0, 31.0, 32.0)
}
# 2D lines on the X, Z Plane
def nutMakeLine2D(x1, z1, x2, z2):
return Part.makeLine(FreeCAD.Base.Vector(x1,0,z1),FreeCAD.Base.Vector(x2,0,z2))
cos15 = math.cos(math.radians(15.0))
cos30 = math.cos(math.radians(30.0))
def nutMakeFace(do, di, s, m):
do = do / 2
di = di / 2
s = s / 2.01
e = s * 1.02 / cos30
ch1 = do - di
ch2 = (e - s) / cos15
fm = FastenerBase.FSFaceMaker()
fm.AddPoint(di, ch1)
fm.AddPoint(do, 0)
fm.AddPoint(s, 0)
fm.AddPoint(e, ch2)
fm.AddPoint(e, m - ch2)
fm.AddPoint(s, m)
fm.AddPoint(do, m)
fm.AddPoint(di, m - ch1)
return fm.GetFace()
def nutMakeSolid(diam):
if not(diam in MHexNutTable):
return None
(key, shape) = FastenerBase.FSGetKey('Nut', diam)
if shape != None:
return shape
s, m, di = MHexNutTable[diam]
do = FastenerBase.MToFloat(diam)
f = nutMakeFace(do, di, s, m)
p = f.revolve(Base.Vector(0.0,0.0,0.0),Base.Vector(0.0,0.0,1.0),360)
htool = screwMaker.makeHextool(s, m, s * 2)
shape = p.cut(htool)
FastenerBase.FSCache[key] = shape
return shape
# h = clMakePressNut('M5','1')
class FSHexNutObject(FSBaseObject):
def __init__(self, obj, attachTo):
'''"Add Metric Hex nut" '''
FSBaseObject.__init__(self, obj, attachTo)
self.itemText = "Nut"
obj.addProperty("App::PropertyEnumeration","diameter","Parameters","Press nut thread diameter").diameter = NutDiamCodes
obj.Proxy = self
def execute(self, fp):
'''"perform object creation" '''
try:
baseobj = fp.baseObject[0]
shape = baseobj.Shape.getElement(fp.baseObject[1][0])
except:
baseobj = None
shape = None
if (not (hasattr(self,'diameter')) or self.diameter != fp.diameter):
if fp.diameter == 'Auto':
d = FastenerBase.FSAutoDiameterM(shape, MHexNutTable, -1)
else:
d = fp.diameter
if d != fp.diameter:
fp.diameter = d
s = nutMakeSolid(d)
self.diameter = fp.diameter
fp.Shape = s
fp.Label = fp.diameter + '-Nut'
else:
FreeCAD.Console.PrintLog("Using cached object\n")
if shape != None:
#fp.Placement = FreeCAD.Placement() # reset placement
FastenerBase.FSMoveToObject(fp, shape, fp.invert, fp.offset.Value)
FastenerBase.FSClassIcons[FSHexNutObject] = 'HexNut.svg'
class FSHexNutCommand:
"""Add Preass-nut command"""
def GetResources(self):
icon = os.path.join( iconPath , 'HexNut.svg')
return {'Pixmap' : icon , # the name of a svg file available in the resources
'MenuText': "Add Hex Nut" ,
'ToolTip' : "Add Metric Hexagon Nut - ISO 4032, Style 3"}
def Activated(self):
FastenerBase.FSGenerateObjects(FSHexNutObject, "Nut")
return
def IsActive(self):
return Gui.ActiveDocument != None
Gui.addCommand("FSHexNut", FSHexNutCommand())
#FastenerBase.FSCommands.append("FSHexNut", "screws", "Nut")