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#(c)www.stani.be (read __doc__ for more information)
__version__ = """v1.2 (11/16/08)"""
__author__ = "www.stani.be"
__license__ = "GPL"
__url__ = "http://www.stani.be/python/sdxf"
__doc__ = \
"""SDXF - Stani's DXF
Python library to generate dxf drawings
Copyright %s
Version %s
License %s
Homepage %s
Library by Stani, whose website is now defunct.
Modifications by Kelly Farrell (http://www.kellbot.com)
to support LWPOLYLINE.
""" % \
(__author__,__version__,__license__,__url__)
# TODO: support for Numeric/Numarray for speeding up
#_______________________________________________________________________________
import copy
####1) Private (only for developpers)
_HEADER_POINTS=['insbase','extmin','extmax']
#---helper functions
def _point(x,index=0):
"""Convert tuple to a dxf point"""
return '\n'.join(['%s\n%s'%((i+1)*10+index,x[i]) for i in range(len(x))])
def _points(p):
"""Convert a list of tuples to dxf points"""
return [_point(p[i],i)for i in range(len(p))]
#---base classes
class _Call:
"""Makes a callable class."""
def copy(self):
"""Returns a copy."""
return copy.deepcopy(self)
def __call__(self,**attrs):
"""Returns a copy with modified attributes."""
copied=self.copy()
for attr in attrs:setattr(copied,attr,attrs[attr])
return copied
class _Entity(_Call):
"""Base class for _common group codes for entities."""
def __init__(self,color=None,extrusion=None,layer='0',
lineType=None,lineTypeScale=None,lineWeight=None,
thickness=None,parent=None):
"""None values will be omitted."""
self.color = color
self.extrusion = extrusion
self.layer = layer
self.lineType = lineType
self.lineTypeScale = lineTypeScale
self.lineWeight = lineWeight
self.thickness = thickness
self.parent = parent
def _common(self):
"""Return common group codes as a string."""
if self.parent:parent=self.parent
else:parent=self
result='8\n%s'%parent.layer
if parent.color!=None: result+='\n62\n%s'%parent.color
if parent.extrusion!=None: result+='\n%s'%_point(parent.extrusion,200)
if parent.lineType!=None: result+='\n6\n%s'%parent.lineType
if parent.lineWeight!=None: result+='\n370\n%s'%parent.lineWeight
if parent.lineTypeScale!=None: result+='\n48\n%s'%parent.lineTypeScale
if parent.thickness!=None: result+='\n39\n%s'%parent.thickness
return result
class _Entities:
"""Base class to deal with composed objects."""
def __dxf__(self):
return []
def __str__(self):
return '\n'.join([str(x) for x in self.__dxf__()])
class _Collection(_Call):
"""Base class to expose entities methods to main object."""
def __init__(self,entities=[]):
self.entities=copy.copy(entities)
#link entities methods to drawing
for attr in dir(self.entities):
if attr[0]!='_':
attrObject=getattr(self.entities,attr)
if callable(attrObject):
setattr(self,attr,attrObject)
####2) Constants
#---color values
BYBLOCK=0
BYLAYER=256
#---block-type flags (bit coded values, may be combined):
ANONYMOUS =1 # This is an anonymous block generated by hatching, associative dimensioning, other internal operations, or an application
NON_CONSTANT_ATTRIBUTES =2 # This block has non-constant attribute definitions (this bit is not set if the block has any attribute definitions that are constant, or has no attribute definitions at all)
XREF =4 # This block is an external reference (xref)
XREF_OVERLAY =8 # This block is an xref overlay
EXTERNAL =16 # This block is externally dependent
RESOLVED =32 # This is a resolved external reference, or dependent of an external reference (ignored on input)
REFERENCED =64 # This definition is a referenced external reference (ignored on input)
#---mtext flags
#attachment point
TOP_LEFT = 1
TOP_CENTER = 2
TOP_RIGHT = 3
MIDDLE_LEFT = 4
MIDDLE_CENTER = 5
MIDDLE_RIGHT = 6
BOTTOM_LEFT = 7
BOTTOM_CENTER = 8
BOTTOM_RIGHT = 9
#drawing direction
LEFT_RIGHT = 1
TOP_BOTTOM = 3
BY_STYLE = 5 #the flow direction is inherited from the associated text style
#line spacing style (optional):
AT_LEAST = 1 #taller characters will override
EXACT = 2 #taller characters will not override
#---polyline flags
CLOSED =1 # This is a closed polyline (or a polygon mesh closed in the M direction)
CURVE_FIT =2 # Curve-fit vertices have been added
SPLINE_FIT =4 # Spline-fit vertices have been added
POLYLINE_3D =8 # This is a 3D polyline
POLYGON_MESH =16 # This is a 3D polygon mesh
CLOSED_N =32 # The polygon mesh is closed in the N direction
POLYFACE_MESH =64 # The polyline is a polyface mesh
CONTINOUS_LINETYPE_PATTERN =128 # The linetype pattern is generated continuously around the vertices of this polyline
#---text flags
#horizontal
LEFT = 0
CENTER = 1
RIGHT = 2
ALIGNED = 3 #if vertical alignment = 0
MIDDLE = 4 #if vertical alignment = 0
FIT = 5 #if vertical alignment = 0
#vertical
BASELINE = 0
BOTTOM = 1
MIDDLE = 2
TOP = 3
####3) Classes
#---entitities
class Arc(_Entity):
"""Arc, angles in degrees."""
def __init__(self,center=(0,0,0),radius=1,
startAngle=0.0,endAngle=90,**common):
"""Angles in degrees."""
_Entity.__init__(self,**common)
self.center=center
self.radius=radius
self.startAngle=startAngle
self.endAngle=endAngle
def __str__(self):
return '0\nARC\n%s\n%s\n40\n%s\n50\n%s\n51\n%s'%\
(self._common(),_point(self.center),
self.radius,self.startAngle,self.endAngle)
class Circle(_Entity):
"""Circle"""
def __init__(self,center=(0,0,0),radius=1,**common):
_Entity.__init__(self,**common)
self.center=center
self.radius=radius
def __str__(self):
return '0\nCIRCLE\n%s\n%s\n40\n%s'%\
(self._common(),_point(self.center),self.radius)
class Face(_Entity):
"""3dface"""
def __init__(self,points,**common):
_Entity.__init__(self,**common)
self.points=points
def __str__(self):
return '\n'.join(['0\n3DFACE',self._common()]+
_points(self.points)
)
class Insert(_Entity):
"""Block instance."""
def __init__(self,name,point=(0,0,0),
xscale=None,yscale=None,zscale=None,
cols=None,colspacing=None,rows=None,rowspacing=None,
rotation=None,
**common):
_Entity.__init__(self,**common)
self.name=name
self.point=point
self.xscale=xscale
self.yscale=yscale
self.zscale=zscale
self.cols=cols
self.colspacing=colspacing
self.rows=rows
self.rowspacing=rowspacing
self.rotation=rotation
def __str__(self):
result='0\nINSERT\n2\n%s\n%s\n%s'%\
(self.name,self._common(),_point(self.point))
if self.xscale!=None:result+='\n41\n%s'%self.xscale
if self.yscale!=None:result+='\n42\n%s'%self.yscale
if self.zscale!=None:result+='\n43\n%s'%self.zscale
if self.rotation:result+='\n50\n%s'%self.rotation
if self.cols!=None:result+='\n70\n%s'%self.cols
if self.colspacing!=None:result+='\n44\n%s'%self.colspacing
if self.rows!=None:result+='\n71\n%s'%self.rows
if self.rowspacing!=None:result+='\n45\n%s'%self.rowspacing
return result
class Line(_Entity):
"""Line"""
def __init__(self,points,**common):
_Entity.__init__(self,**common)
self.points=points
def __str__(self):
return '\n'.join(['0\nLINE',self._common()]+
_points(self.points))
class LwPolyLine(_Entity):
"""This is a LWPOLYLINE. I have no idea how it differs from a normal PolyLine"""
def __init__(self,points,flag=0,width=None,**common):
_Entity.__init__(self,**common)
self.points=points
self.flag=flag
self.width=width
def __str__(self):
result= '0\nLWPOLYLINE\n%s\n70\n%s'%\
(self._common(),self.flag)
result+='\n90\n%s'%len(self.points)
for point in self.points:
result+='\n%s'%_point(point)
if self.width:result+='\n40\n%s\n41\n%s'%(self.width,self.width)
return result
class PolyLine(_Entity):
# TODO: Finish polyline (now implemented as a series of lines)
def __init__(self,points,flag=0,width=None,**common):
_Entity.__init__(self,**common)
self.points=points
self.flag=flag
self.width=width
def __str__(self):
result= '0\nPOLYLINE\n%s\n70\n%s'%\
(self._common(),self.flag)
for point in self.points:
result+='\n0\nVERTEX\n%s'%_point(point)
if self.width:result+='\n40\n%s\n41\n%s'%(self.width,self.width)
result+='\n0\nSEQEND'
return result
class Point(_Entity):
"""Colored solid fill."""
def __init__(self,points=None,**common):
_Entity.__init__(self,**common)
self.points=points
class Solid(_Entity):
"""Colored solid fill."""
def __init__(self,points=None,**common):
_Entity.__init__(self,**common)
self.points=points
def __str__(self):
return '\n'.join(['0\nSOLID',self._common()]+
_points(self.points[:2]+[self.points[3],self.points[2]])
)
class Text(_Entity):
"""Single text line."""
def __init__(self,text='',point=(0,0,0),alignment=None,
flag=None,height=1,justifyhor=None,justifyver=None,
rotation=None,obliqueAngle=None,style=None,xscale=None,**common):
_Entity.__init__(self,**common)
self.text=text
self.point=point
self.alignment=alignment
self.flag=flag
self.height=height
self.justifyhor=justifyhor
self.justifyver=justifyver
self.rotation=rotation
self.obliqueAngle=obliqueAngle
self.style=style
self.xscale=xscale
def __str__(self):
result= '0\nTEXT\n%s\n%s\n40\n%s\n1\n%s'%\
(self._common(),_point(self.point),self.height,self.text)
if self.rotation:result+='\n50\n%s'%self.rotation
if self.xscale:result+='\n41\n%s'%self.xscale
if self.obliqueAngle:result+='\n51\n%s'%self.obliqueAngle
if self.style:result+='\n7\n%s'%self.style
if self.flag:result+='\n71\n%s'%self.flag
if self.justifyhor:result+='\n72\n%s'%self.justifyhor
if self.alignment:result+='\n%s'%_point(self.alignment,1)
if self.justifyver:result+='\n73\n%s'%self.justifyver
return result
class Mtext(Text):
"""Surrogate for mtext, generates some Text instances."""
def __init__(self,text='',point=(0,0,0),width=250,spacingFactor=1.5,down=0,spacingWidth=None,**options):
Text.__init__(self,text=text,point=point,**options)
if down:spacingFactor*=-1
self.spacingFactor=spacingFactor
self.spacingWidth=spacingWidth
self.width=width
self.down=down
def __str__(self):
texts=self.text.replace('\r\n','\n').split('\n')
if not self.down:texts.reverse()
result=''
x=y=0
if self.spacingWidth:spacingWidth=self.spacingWidth
else:spacingWidth=self.height*self.spacingFactor
for text in texts:
while text:
result+='\n%s'%Text(text[:self.width],
point=(self.point[0]+x*spacingWidth,
self.point[1]+y*spacingWidth,
self.point[2]),
alignment=self.alignment,flag=self.flag,height=self.height,
justifyhor=self.justifyhor,justifyver=self.justifyver,
rotation=self.rotation,obliqueAngle=self.obliqueAngle,
style=self.style,xscale=self.xscale,parent=self
)
text=text[self.width:]
if self.rotation:x+=1
else:y+=1
return result[1:]
##class _Mtext(_Entity):
## """Mtext not functioning for minimal dxf."""
## def __init__(self,text='',point=(0,0,0),attachment=1,
## charWidth=None,charHeight=1,direction=1,height=100,rotation=0,
## spacingStyle=None,spacingFactor=None,style=None,width=100,
## xdirection=None,**common):
## _Entity.__init__(self,**common)
## self.text=text
## self.point=point
## self.attachment=attachment
## self.charWidth=charWidth
## self.charHeight=charHeight
## self.direction=direction
## self.height=height
## self.rotation=rotation
## self.spacingStyle=spacingStyle
## self.spacingFactor=spacingFactor
## self.style=style
## self.width=width
## self.xdirection=xdirection
## def __str__(self):
## input=self.text
## text=''
## while len(input)>250:
## text+='\n3\n%s'%input[:250]
## input=input[250:]
## text+='\n1\n%s'%input
## result= '0\nMTEXT\n%s\n%s\n40\n%s\n41\n%s\n71\n%s\n72\n%s%s\n43\n%s\n50\n%s'%\
## (self._common(),_point(self.point),self.charHeight,self.width,
## self.attachment,self.direction,text,
## self.height,
## self.rotation)
## if self.style:result+='\n7\n%s'%self.style
## if self.xdirection:result+='\n%s'%_point(self.xdirection,1)
## if self.charWidth:result+='\n42\n%s'%self.charWidth
## if self.spacingStyle:result+='\n73\n%s'%self.spacingStyle
## if self.spacingFactor:result+='\n44\n%s'%self.spacingFactor
## return result
#---tables
class Block(_Collection):
"""Use list methods to add entities, eg append."""
def __init__(self,name,layer='0',flag=0,base=(0,0,0),entities=[]):
self.entities=copy.copy(entities)
_Collection.__init__(self,entities)
self.layer=layer
self.name=name
self.flag=0
self.base=base
def __str__(self):
e='\n'.join([str(x)for x in self.entities])
return '0\nBLOCK\n8\n%s\n2\n%s\n70\n%s\n%s\n3\n%s\n%s\n0\nENDBLK'%\
(self.layer,self.name.upper(),self.flag,_point(self.base),self.name.upper(),e)
class Layer(_Call):
"""Layer"""
def __init__(self,name='pydxf',color=7,lineType='continuous',flag=64):
self.name=name
self.color=color
self.lineType=lineType
self.flag=flag
def __str__(self):
return '0\nLAYER\n2\n%s\n70\n%s\n62\n%s\n6\n%s'%\
(self.name.upper(),self.flag,self.color,self.lineType)
class LineType(_Call):
"""Custom linetype"""
def __init__(self,name='continuous',description='Solid line',elements=[],flag=64):
# TODO: Implement lineType elements
self.name=name
self.description=description
self.elements=copy.copy(elements)
self.flag=flag
def __str__(self):
return '0\nLTYPE\n2\n%s\n70\n%s\n3\n%s\n72\n65\n73\n%s\n40\n0.0'%\
(self.name.upper(),self.flag,self.description,len(self.elements))
class Style(_Call):
"""Text style"""
def __init__(self,name='standard',flag=0,height=0,widthFactor=40,obliqueAngle=50,
mirror=0,lastHeight=1,font='arial.ttf',bigFont=''):
self.name=name
self.flag=flag
self.height=height
self.widthFactor=widthFactor
self.obliqueAngle=obliqueAngle
self.mirror=mirror
self.lastHeight=lastHeight
self.font=font
self.bigFont=bigFont
def __str__(self):
return '0\nSTYLE\n2\n%s\n70\n%s\n40\n%s\n41\n%s\n50\n%s\n71\n%s\n42\n%s\n3\n%s\n4\n%s'%\
(self.name.upper(),self.flag,self.flag,self.widthFactor,
self.obliqueAngle,self.mirror,self.lastHeight,
self.font.upper(),self.bigFont.upper())
class View(_Call):
def __init__(self,name,flag=0,width=1,height=1,center=(0.5,0.5),
direction=(0,0,1),target=(0,0,0),lens=50,
frontClipping=0,backClipping=0,twist=0,mode=0):
self.name=name
self.flag=flag
self.width=width
self.height=height
self.center=center
self.direction=direction
self.target=target
self.lens=lens
self.frontClipping=frontClipping
self.backClipping=backClipping
self.twist=twist
self.mode=mode
def __str__(self):
return '0\nVIEW\n2\n%s\n70\n%s\n40\n%s\n%s\n41\n%s\n%s\n%s\n42\n%s\n43\n%s\n44\n%s\n50\n%s\n71\n%s'%\
(self.name,self.flag,self.height,_point(self.center),self.width,
_point(self.direction,1),_point(self.target,2),self.lens,
self.frontClipping,self.backClipping,self.twist,self.mode)
def ViewByWindow(name,leftBottom=(0,0),rightTop=(1,1),**options):
width=abs(rightTop[0]-leftBottom[0])
height=abs(rightTop[1]-leftBottom[1])
center=((rightTop[0]+leftBottom[0])*0.5,(rightTop[1]+leftBottom[1])*0.5)
return View(name=name,width=width,height=height,center=center,**options)
#---drawing
class Drawing(_Collection):
"""Dxf drawing. Use append or any other list methods to add objects."""
def __init__(self,insbase=(0.0,0.0,0.0),extmin=(0.0,0.0),extmax=(0.0,0.0),
layers=[Layer()],linetypes=[LineType()],styles=[Style()],blocks=[],
views=[],entities=None,fileName='test.dxf'):
# TODO: replace list with None,arial
if not entities:entities=[]
_Collection.__init__(self,entities)
self.insbase=insbase
self.extmin=extmin
self.extmax=extmax
self.layers=copy.copy(layers)
self.linetypes=copy.copy(linetypes)
self.styles=copy.copy(styles)
self.views=copy.copy(views)
self.blocks=copy.copy(blocks)
self.fileName=fileName
#private
self.acadver='9\n$ACADVER\n1\nAC1006'
def _name(self,x):
"""Helper function for self._point"""
return '9\n$%s'%x.upper()
def _point(self,name,x):
"""Point setting from drawing like extmin,extmax,..."""
return '%s\n%s'%(self._name(name),_point(x))
def _section(self,name,x):
"""Sections like tables,blocks,entities,..."""
if x:xstr='\n'+'\n'.join(x)
else:xstr=''
return '0\nSECTION\n2\n%s%s\n0\nENDSEC'%(name.upper(),xstr)
def _table(self,name,x):
"""Tables like ltype,layer,style,..."""
if x:xstr='\n'+'\n'.join(x)
else:xstr=''
return '0\nTABLE\n2\n%s\n70\n%s%s\n0\nENDTAB'%(name.upper(),len(x),xstr)
def __str__(self):
"""Returns drawing as dxf string."""
header=[self.acadver]+[self._point(attr,getattr(self,attr)) for attr in _HEADER_POINTS]
header=self._section('header',header)
tables=[self._table('ltype',[str(x) for x in self.linetypes]),
self._table('layer',[str(x) for x in self.layers]),
self._table('style',[str(x) for x in self.styles]),
self._table('view',[str(x) for x in self.views]),
]
tables=self._section('tables',tables)
blocks=self._section('blocks',[str(x) for x in self.blocks])
entities=self._section('entities',[str(x) for x in self.entities])
all='\n'.join([header,tables,blocks,entities,'0\nEOF\n'])
return all
def saveas(self,fileName):
self.fileName=fileName
self.save()
def save(self):
test=open(self.fileName,'w')
test.write(str(self))
test.close()
#---extras
class Rectangle(_Entity):
"""Rectangle, creates lines."""
def __init__(self,point=(0,0,0),width=1,height=1,solid=None,line=1,**common):
_Entity.__init__(self,**common)
self.point=point
self.width=width
self.height=height
self.solid=solid
self.line=line
def __str__(self):
result=''
points=[self.point,(self.point[0]+self.width,self.point[1],self.point[2]),
(self.point[0]+self.width,self.point[1]+self.height,self.point[2]),
(self.point[0],self.point[1]+self.height,self.point[2]),self.point]
if self.solid:
result+='\n%s'%Solid(points=points[:-1],parent=self.solid)
if self.line:
for i in range(4):result+='\n%s'%\
Line(points=[points[i],points[i+1]],parent=self)
return result[1:]
class LineList(_Entity):
"""Like polyline, but built of individual lines."""
def __init__(self,points=[],closed=0,**common):
_Entity.__init__(self,**common)
self.closed=closed
self.points=copy.copy(points)
def __str__(self):
if self.closed:points=self.points+[self.points[0]]
else: points=self.points
result=''
for i in range(len(points)-1):result+='\n%s'%\
Line(points=[points[i],points[i+1]],parent=self)
return result[1:]
PolyLine=LineList
#---test
def main():
#Blocks
b=Block('test')
b.append(Solid(points=[(0,0,0),(1,0,0),(1,1,0),(0,1,0)],color=1))
b.append(Arc(center=(1,0,0),color=2))
#Drawing
d=Drawing()
#tables
d.blocks.append(b) #table blocks
d.styles.append(Style()) #table styles
d.views.append(View('Normal')) #table view
d.views.append(ViewByWindow('Window',leftBottom=(1,0),rightTop=(2,1))) #idem
#entities
d.append(Circle(center=(1,1,0),color=3))
d.append(Face(points=[(0,0,0),(1,0,0),(1,1,0),(0,1,0)],color=4))
d.append(Insert('test',point=(3,3,3),cols=5,colspacing=2))
d.append(Line(points=[(0,0,0),(1,1,1)]))
d.append(Mtext('Click on Ads\nmultiple lines with mtext',point=(1,1,1),color=5,rotation=90))
d.append(Text('Please donate!',point=(3,0,1)))
d.append(Rectangle(point=(2,2,2),width=4,height=3,color=6,solid=Solid(color=2)))
d.append(Solid(points=[(4,4,0),(5,4,0),(7,8,0),(9,9,0)],color=3))
d.append(PolyLine(points=[(1,1,1),(2,1,1),(2,2,1),(1,2,1)],closed=1,color=1))
d.saveas('c:\\test.dxf')
if __name__=='__main__':main()
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