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exportDRAWEXE.py
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exportDRAWEXE.py
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#***************************************************************************
#* *
#* Copyright (c) 2014 Sebastian Hoogen <github@sebastianhoogen.de> *
#* *
#* This program is free software; you can redistribute it and/or modify *
#* it under the terms of the GNU Lesser General Public License (LGPL) *
#* as published by the Free Software Foundation; either version 2 of *
#* the License, or (at your option) any later version. *
#* for detail see the LICENCE text file. *
#* *
#* 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 Library General Public License for more details. *
#* *
#* You should have received a copy of the GNU Library General Public *
#* License along with this program; if not, write to the Free Software *
#* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 *
#* USA *
#* *
#***************************************************************************
__title__="FreeCAD OpenSCAD Workbench - DRAWEXE exporter"
__author__ = "Sebastian Hoogen <github@sebastianhoogen.de>"
import FreeCAD, Part
if open.__module__ == '__builtin__':
pythonopen = open
def f2s(n):
'''convert to numerical value to string'''
#return str(float(n))
return ('%0.18f' % n).rstrip('0')
def isDraftFeature(ob):
if ob.isDerivedFrom('Part::FeaturePython') and \
hasattr(ob.Proxy,'__module__') and \
ob.Proxy.__module__ == 'Draft':
return True
def isDraftClone(ob):
if ob.isDerivedFrom('Part::FeaturePython') and \
hasattr(ob.Proxy,'__module__') and \
ob.Proxy.__module__ == 'Draft':
import Draft
return isinstance(ob.Proxy,Draft._Clone)
def isOpenSCADFeature(ob):
if ob.isDerivedFrom('Part::FeaturePython') and \
hasattr(ob.Proxy,'__module__') and \
ob.Proxy.__module__ == 'OpenSCADFeatures':
return True
def isOpenSCADMultMatrixFeature(ob):
if ob.isDerivedFrom('Part::FeaturePython') and \
hasattr(ob.Proxy,'__module__') and \
ob.Proxy.__module__ == 'OpenSCADFeatures':
import OpenSCADFeatures
return isinstance(ob.Proxy,OpenSCADFeatures.MatrixTransform)
def isDeform(ob):
"""tests whether the object is a Matrix transformation
that does a non-uniform scaling"""
# the [ is important to exclude cases with additional
# rotation or mirroring.
# TBD decompose complex matrix operations
return isOpenSCADMultMatrixFeature(ob) and \
ob.Matrix.analyze().startswith('Scale [')
def process_object(csg,ob,filename):
d1 = {'name':ob.Name}
hasplacement = not ob.Placement.isNull()
if ob.TypeId in ["Part::Cut","Part::Fuse","Part::Common","Part::Section"]:
d1.update({'part':ob.Base.Name,'tool':ob.Tool.Name,\
'command':'b%s' % ob.TypeId[6:].lower()})
process_object(csg,ob.Base,filename)
process_object(csg,ob.Tool,filename)
csg.write("%(command)s %(name)s %(part)s %(tool)s\n"%d1)
elif ob.TypeId == "Part::Sphere" :
d1.update({'radius':f2s(ob.Radius),'angle1':f2s(ob.Angle1),\
'angle2':f2s(ob.Angle2),'angle3':f2s(ob.Angle3)})
csg.write('psphere %(name)s %(radius)s %(angle1)s %(angle2)s '\
'%(angle3)s\n'%d1)
elif ob.TypeId == "Part::Box" :
d1.update({'dx':f2s(ob.Length),'dy':f2s(ob.Width),'dz':f2s(ob.Height)})
csg.write('box %(name)s %(dx)s %(dy)s %(dz)s\n'%d1)
elif ob.TypeId == "Part::Cylinder" :
d1.update({'radius':f2s(ob.Radius),'height':f2s(ob.Height),\
'angle':f2s(ob.Angle)})
csg.write('pcylinder %(name)s %(radius)s %(height)s %(angle)s\n'%d1)
elif ob.TypeId == "Part::Cone" :
d1.update({'radius1':f2s(ob.Radius1),'radius2':f2s(ob.Radius2),\
'height':f2s(ob.Height)})
csg.write('pcone %(name)s %(radius1)s %(radius2)s %(height)s\n'%d1)
elif ob.TypeId == "Part::Torus" :
d1.update({'radius1':f2s(ob.Radius1),'radius2':f2s(ob.Radius2),\
'angle1': f2s(ob.Angle1),'angle2':f2s(ob.Angle2),\
'angle3': f2s(ob.Angle3)})
csg.write('ptorus %(name)s %(radius1)s %(radius2)s %(angle1)s '\
'%(angle2)s %(angle3)s\n' % d1)
elif ob.TypeId == "Part::Mirroring" :
process_object(csg,ob.Source,filename)
csg.write('tcopy %s %s\n'%(ob.Source.Name,d1['name']))
b=ob.Base
d1['dx']=f2s(ob.Base.x)
d1['dy']=f2s(ob.Base.y)
d1['dz']=f2s(ob.Base.z)
d1['x']=f2s(ob.Normal.x)
d1['y']=f2s(ob.Normal.y)
d1['z']=f2s(ob.Normal.z)
csg.write('smirror %(name)s %(x)s %(y)s %(z)s %(dx)s %(dy)s %(dz)s\n' % d1)
elif ob.TypeId in ["Part::MultiCommon", "Part::MultiFuse"]:
if len(ob.Shapes) == 0:
pass
elif len(ob.Shapes) == 1:
process_object(csg,ob.Shapes[0],filename)
csg.write('tcopy %s %s\n'%(ob.Shapes[0].Name,d1['name']))
else:
topname = ob.Name
command = 'b%s' % ob.TypeId[11:].lower()
lst1=ob.Shapes[:]
current=lst1.pop(0)
curname=current.Name
process_object(csg,current,filename)
i=1
while lst1:
if len(lst1) >= 2:
nxtname='to-%s-%03d-t'%(topname,i)
else:
nxtname=topname
nxt=lst1.pop(0)
process_object(csg,nxt,filename)
csg.write("%s %s %s %s\n"%(command,nxtname,curname,nxt.Name))
curname=nxtname
elif ob.TypeId == "Part::Prism" :
import math
polyname = '%s-polyline' % d1['name']
wirename = '%s-polywire' % d1['name']
facename = '%s-polyface' % d1['name']
d1['base']= facename
m=FreeCAD.Matrix()
v=FreeCAD.Vector(ob.Circumradius.Value,0,0)
m.rotateZ(2*math.pi/ob.Polygon)
points=[]
for i in range(ob.Polygon):
points.append(v)
v=m.multiply(v)
points.append(v)
pointstr=' '.join('%s %s %s'%(f2s(v.x),f2s(v.y),f2s(v.z)) \
for v in points)
csg.write('polyline %s %s\n' % (polyname,pointstr))
csg.write('wire %s %s\n' %(wirename,polyname))
csg.write('mkplane %s %s\n' % (facename,polyname))
csg.write('prism %s %s 0 0 %s\n' % (d1['name'],facename,\
f2s(ob.Height.Value)))
elif isDeform(ob): #non-uniform scaling
m=ob.Matrix
process_object(csg,ob.Base,filename)
#csg.write('tcopy %s %s\n'%(ob.Base.Name,d1['name']))
d1['basename']=ob.Base.Name
d1['cx']=f2s(m.A11)
d1['cy']=f2s(m.A22)
d1['cz']=f2s(m.A33)
csg.write('deform %(name)s %(basename)s %(cx)s %(cy)s %(cz)s\n' % d1)
if m.A14 > 1e-8 or m.A24 > 1e-8 or m.A34 > 1e-8:
csg.write("ttranslate %s %s %s %s\n" % \
(ob.Name,f2s(m.A14),f2s(m.A24),f2s(m.A34)))
elif isDraftClone(ob):
x,y,z=ob.Scale.x
if x == y == z: #uniform scaling
d1['scale']=f2s(x)
else:
d1['cx']=f2s(x)
d1['cy']=f2s(y)
d1['cz']=f2s(z)
if len(ob.Objects) == 1:
d1['basename']=ob.Objects[0].Name
process_object(csg,ob.Objects[0],filename)
if x == y == z: #uniform scaling
csg.write('tcopy %(basename)s %(name)s\n' % d1)
csg.write('pscale %(name)s 0 0 0 %(scale)s\n' % d1)
else:
csg.write('deform %(name)s %(basename)s'\
' %(cx)s %(cy)s %(cz)s\n' % d1)
else: #compound
newnames=[]
for i,subobj in enumerate(ob.Objects):
process_object(csg,subobj,filename)
d1['basename']=subobj.Name
newname='%s-%2d' % (ob.Name,i)
d1['newname']=newname
newnames.append(newname)
if x == y == z: #uniform scaling
csg.write('tcopy %(basename)s %(newname)s\n' % d1)
csg.write('pscale %(newname)s 0 0 0 %(scale)s\n' % d1)
else:
csg.write('deform %(newname)s %(basename)s'\
' %(cx)s %(cy)s %(cz)s\n' % d1)
csg.write('compound %s %s\n' % (' '.join(newnames),ob.Name))
#elif ob.isDerivedFrom('Part::FeaturePython') and \
# hasattr(ob.Proxy,'__module__'):
# pass
elif ob.isDerivedFrom('Part::Feature') :
if ob.Shape.isNull(): #would crash in exportBrep otherwise
raise ValueError
import os
spath,sname = os.path.split(filename)
sname.replace('.','-')
uname='%s-%s' %(sname,d1['name'])
breppath=os.path.join(spath,'%s.brep'%uname)
csg.write("restore %s.brep\n"%uname)
csg.write("renamevar %s %s\n"%(uname,d1['name']))
if False: # saved with placement
hasplacement = False # saved with placement
ob.Shape.exportBrep(breppath)
if not hasplacement: #doesn't matter
ob.Shape.exportBrep(breppath)
else: #remove placement
sh=ob.Shape.copy()
sh.Placement=FreeCAD.Placement()
sh.exportBrep(breppath)
if hasplacement:
if not ob.Placement.Rotation.isNull():
import math
dx,dy,dz=ob.Placement.Rotation.Axis
an=math.degrees(ob.Placement.Rotation.Angle)
csg.write("trotate %s 0 0 0 %s %s %s %s\n" % \
(ob.Name,f2s(dx),f2s(dy),f2s(dz),f2s(an)))
if ob.Placement.Base.Length > 1e-8:
x,y,z=ob.Placement.Base
csg.write("ttranslate %s %s %s %s\n" % \
(ob.Name,f2s(x),f2s(y),f2s(z)))
def export(exportList,filename):
"called when freecad exports a file"
# process Objects
csg = pythonopen(filename,'w')
csg.write('#generated by FreeCAD\n')
csg.write('pload ALL\n')
for ob in exportList:
process_object(csg,ob,filename)
csg.write('donly %s\n'%' '.join([obj.Name for obj in exportList]))
csg.close()