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blender/release/scripts/export_dxf.py
Remigiusz Fiedler 8b2f089c6e DXF-Exporter update 
v1.27 - 2008.10.07 by migius
- exclude Stani's DXF-Library to extern module
- add "hidden mode" substitut: back-faces removal
- add support for mesh ->POLYFACE
- optimized code for "Flat" procedure
- modif FACE class for r12
- add mesh-polygon -> Bezier-curve converter (Yorik's code)
- add support for curves ->POLYLINEs
- add "3d-View to Flat" - geometry projection to XY-plane
2008-10-07 20:34:24 +00:00

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#!BPY
"""
Name: 'Autodesk DXF (.dxf)'
Blender: 247
Group: 'Export'
Tooltip: 'Export geometry to DXF-r12 (Drawing eXchange Format).'
"""
__version__ = "v1.27beta - 2008.10.07"
__author__ = "Remigiusz Fiedler (AKA migius)"
__license__ = "GPL"
__url__ = "http://wiki.blender.org/index.php/Scripts/Manual/Export/autodesk_dxf"
__bpydoc__ ="""The script exports Blender geometry to DXF format r12 version.
Version %s
Copyright %s
License %s
extern dependances: dxfLibrary.py
See the homepage for documentation.
url: %s
IDEAs:
- correct normals for POLYLINE-POLYFACE via proper point-order
- HPGL output for 2d and flattened 3d content
TODO:
- optimize back-faces removal (probably needs matrix transform)
- optimize POLYFACE routine: remove double-vertices
- optimize POLYFACE routine: remove unused vertices
- support hierarchies: groups, instances, parented structures
- support 210-code (3d orientation vector)
- presets for architectural scales
- write drawing extends for automatic view positioning in CAD
History
v1.27 - 2008.10.07 by migius
- exclude Stani's DXF-Library to extern module
v1.26 - 2008.10.05 by migius
- add "hidden mode" substitut: back-faces removal
- add support for mesh ->POLYFACE
- optimized code for "Flat" procedure
v1.25 - 2008.09.28 by migius
- modif FACE class for r12
- add mesh-polygon -> Bezier-curve converter (Yorik's code)
- add support for curves ->POLYLINEs
- add "3d-View to Flat" - geometry projection to XY-plane
v1.24 - 2008.09.27 by migius
- add start UI with preferences
- modif POLYLINE class for r12
- changing output format from r9 to r12(AC1009)
v1.23 - 2008.09.26 by migius
- add finish message-box
v1.22 - 2008.09.26 by migius
- add support for curves ->LINEs
- add support for mesh-edges ->LINEs
v1.21 - 2008.06.04 by migius
- initial adaptation for Blender
v1.1 (20/6/2005) by Stani Michiels www.stani.be/python/sdxf
- Python library to generate dxf drawings
______________________________________________________________
""" % (__author__,__version__,__license__,__url__)
# --------------------------------------------------------------------------
# Script copyright (C) 2008 Remigiusz Fiedler (AKA migius)
# --------------------------------------------------------------------------
# ***** BEGIN GPL LICENSE BLOCK *****
#
# 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# ***** END GPL LICENCE BLOCK *****
import Blender
from Blender import Mathutils, Window, Scene, sys, Draw
import BPyMessages
#import dxfLibrary
#reload(dxfLibrary)
from dxfLibrary import *
#-----------------------------------------------------
def hidden_status(faces, mx_n):
#print 'HIDDEN_MODE: caution! not full implemented yet'
ok_faces = []
ok_edges = []
#sort out back-faces = with normals pointed away from camera
for f in faces:
#print 'deb: face=', f #---------
# get its normal-vector in localCS
vec_normal = f.no.copy()
#print 'deb: vec_normal=', vec_normal #------------------
#must be transfered to camera/view-CS
vec_normal *= mx_n
#vec_normal *= mb.rotationPart()
#print 'deb:2vec_normal=', vec_normal #------------------
#vec_normal *= mw0.rotationPart()
#print 'deb:3vec_normal=', vec_normal, '\n' #------------------
# normal must point the Z direction-hemisphere
if vec_normal[2] > 0.0 :
ok_faces.append(f.index)
for key in f.edge_keys:
#this test can be done faster with set()
if key not in ok_edges:
ok_edges.append(key)
#print 'deb: amount of visible faces=', len(ok_faces) #---------
#print 'deb: visible faces=', ok_faces #---------
#print 'deb: amount of visible edges=', len(ok_edges) #---------
#print 'deb: visible edges=', ok_edges #---------
return ok_faces, ok_edges
#-----------------------------------------------------
def projected_co(vec, mw):
# convert the world coordinates of vector to screen coordinates
#co = vec.co.copy().resize4D()
co = vec.copy().resize4D()
co[3] = 1.0
sc = co * mw
#print 'deb: viewprojection=', sc #---------
return [sc[0],sc[1],0.0]
#--------not used---------------------------------------------
def flatten(points, mw):
for i,v in enumerate(points):
v = projected_co(v, mw)
points[i]=v
#print 'deb: flatten points=', points #---------
return points
#-----------------------------------------------------
def exportMesh(ob, mx, mx_n):
entities = []
me = ob.getData(mesh=1)
#me.transform(mx)
# above is eventualy faster, but bad, cause
# directly transforms origin geometry and write back rounding errors
me_verts = me.verts[:] #we dont want manipulate origin data
#print 'deb: me_verts=', me_verts #---------
#me.transform(mx_inv) #counterpart to - back to the origin state
for v in me_verts:
v.co *= mx
faces=[]
edges=[]
if HIDDEN_MODE:
ok_faces, ok_edges = hidden_status(me.faces, mx_n)
#if (not FLATTEN) and len(me.faces)>0 and ONLYFACES:
if ONLYFACES:
if POLYFACES: #export 3D as POLYFACEs
allpoints = []
allfaces = []
allpoints = [v.co[:3] for v in me_verts]
for f in me.faces:
#print 'deb: face=', f #---------
if not HIDDEN_MODE or \
(HIDDEN_MODE and f.index in ok_faces):
if 1:
points = f.verts
face = [p.index+1 for p in points]
#print 'deb: face=', face #---------
allfaces.append(face)
else: #bad, cause create multiple vertex instances
points = f.verts
points = [ me_verts[p.index].co[:3] for p in points]
#points = [p.co[:3] for p in points]
#print 'deb: points=', points #---------
index = len(allpoints)+1
face = [index+i for i in range(len(points))]
allpoints.extend(points)
allfaces.append(face)
if allpoints and allfaces:
#print 'deb: allpoints=', allpoints #---------
#print 'deb: allfaces=', allfaces #---------
dxfPOLYFACE = PolyLine([allpoints, allfaces], flag=64)
entities.append(dxfPOLYFACE)
else: #export 3D as 3DFACEs
for f in me.faces:
#print 'deb: face=', f #---------
if not HIDDEN_MODE or \
(HIDDEN_MODE and f.index in ok_faces):
points = f.verts
points = [ me_verts[p.index].co[:3] for p in points]
#points = [p.co[:3] for p in points]
#print 'deb: points=', points #---------
dxfFACE = Face(points)
entities.append(dxfFACE)
else: #export 3D as LINEs
if HIDDEN_MODE and len(me.faces)!=0:
for e in ok_edges:
points = [ me_verts[key].co[:3] for key in e]
dxfLINE = Line(points)
entities.append(dxfLINE)
else:
for e in me.edges:
#print 'deb: edge=', e #---------
points=[]
#points = [e.v1.co*mx, e.v2.co*mx]
points = [ me_verts[key].co[:3] for key in e.key]
#print 'deb: points=', points #---------
dxfLINE = Line(points)
entities.append(dxfLINE)
return entities
#-----------------------------------------------------
def exportCurve(ob, mx):
entities = []
curve = ob.getData()
for cur in curve:
#print 'deb: START cur=', cur #--------------
if 1: #not cur.isNurb():
#print 'deb: START points' #--------------
points = []
org_point = [0.0,0.0,0.0]
for point in cur:
#print 'deb: point=', point #---------
if cur.isNurb():
vec = point[0:3]
else:
point = point.getTriple()
#print 'deb: point=', point #---------
vec = point[1]
#print 'deb: vec=', vec #---------
pkt = Mathutils.Vector(vec) * mx
#print 'deb: pkt=', pkt #---------
#pkt *= SCALE_FACTOR
if 0: #FLATTEN:
pkt = projected_co(pkt, mw)
points.append(pkt)
if cur.isCyclic(): closed = 1
else: closed = 0
if len(points)>1:
#print 'deb: points', points #--------------
if POLYLINES: dxfPLINE = PolyLine(points,org_point,closed)
else: dxfPLINE = LineList(points,org_point,closed)
entities.append(dxfPLINE)
return entities
#-----------------------------------------------------
def do_export(sel_group, filepath):
Window.WaitCursor(1)
t = sys.time()
#init Drawing ---------------------
d=Drawing()
#add 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
#add Entities --------------------
something_ready = False
#ViewVector = Mathutils.Vector(Window.GetViewVector())
#print 'deb: ViewVector=', ViewVector #------------------
mw0 = Window.GetViewMatrix()
#mw0 = Window.GetPerspMatrix() #TODO: how get it working?
mw = mw0.copy()
if FLATTEN:
m0 = Mathutils.Matrix()
m0[2][2]=0.0
mw *= m0 #flatten ViewMatrix
for ob in sel_group:
entities = []
mx = ob.matrix.copy()
mb = mx.copy()
#print 'deb: mb =\n', mb #---------
#print 'deb: mw0 =\n', mw0 #---------
mx_n = mx.rotationPart() * mw0.rotationPart() #trans-matrix for normal_vectors
if SCALE_FACTOR!=1.0: mx *= SCALE_FACTOR
if FLATTEN: mx *= mw
#mx_inv = mx.copy().invert()
#print 'deb: mx =\n', mx #---------
#print 'deb: mx_inv=\n', mx_inv #---------
if (ob.type == 'Mesh'):
entities = exportMesh(ob, mx, mx_n)
elif (ob.type == 'Curve'):
entities = exportCurve(ob, mx)
for e in entities:
d.append(e)
something_ready = True
if something_ready:
d.saveas(filepath)
Window.WaitCursor(0)
#Draw.PupMenu('DXF Exporter: job finished')
print 'exported to %s' % filepath
print 'finished in %.2f seconds' % (sys.time()-t)
else:
Window.WaitCursor(0)
print "Abort: selected objects dont mach choosen export option, nothing exported!"
Draw.PupMenu('DXF Exporter: nothing exported!|selected objects dont mach choosen export option!')
#----globals------------------------------------------
ONLYSELECTED = True
POLYLINES = True
ONLYFACES = False
POLYFACES = 1
FLATTEN = 0
HIDDEN_MODE = False #filter out hidden lines
SCALE_FACTOR = 1.0 #optional, can be done later in CAD too
#-----------------------------------------------------
def dxf_export_ui(filepath):
global ONLYSELECTED,\
POLYLINES,\
ONLYFACES,\
POLYFACES,\
FLATTEN,\
HIDDEN_MODE,\
SCALE_FACTOR
print '\n\nDXF-Export %s -----------------------' %__version__
#filepath = 'blend_test.dxf'
# Dont overwrite
if not BPyMessages.Warning_SaveOver(filepath):
print 'Aborted by user: nothing exported'
return
#test():return
PREF_ONLYSELECTED= Draw.Create(ONLYSELECTED)
PREF_POLYLINES= Draw.Create(POLYLINES)
PREF_ONLYFACES= Draw.Create(ONLYFACES)
PREF_POLYFACES= Draw.Create(POLYFACES)
PREF_FLATTEN= Draw.Create(FLATTEN)
PREF_HIDDEN_MODE= Draw.Create(HIDDEN_MODE)
PREF_SCALE_FACTOR= Draw.Create(SCALE_FACTOR)
PREF_HELP= Draw.Create(0)
block = [\
("only selected", PREF_ONLYSELECTED, "export only selected geometry"),\
("global Scale:", PREF_SCALE_FACTOR, 0.001, 1000, "set global Scale factor for exporting geometry"),\
("only faces", PREF_ONLYFACES, "from mesh-objects export only faces, otherwise only edges"),\
("write POLYFACE", PREF_POLYFACES, "export mesh to POLYFACE, otherwise to 3DFACEs"),\
("write POLYLINEs", PREF_POLYLINES, "export curve to POLYLINE, otherwise to LINEs"),\
("3D-View to Flat", PREF_FLATTEN, "flatten geometry according current 3d-View"),\
("Hidden Mode", PREF_HIDDEN_MODE, "filter out hidden lines"),\
#(''),\
("online Help", PREF_HELP, "calls DXF-Exporter Manual Page on Wiki.Blender.org"),\
]
if not Draw.PupBlock("DXF-Exporter %s" %__version__[:10], block): return
if PREF_HELP.val!=0:
try:
import webbrowser
webbrowser.open('http://wiki.blender.org/index.php?title=Scripts/Manual/Export/autodesk_dxf')
except:
Draw.PupMenu('DXF Exporter: %t|no connection to manual-page on Blender-Wiki! try:|\
http://wiki.blender.org/index.php?title=Scripts/Manual/Export/autodesk_dxf')
return
ONLYSELECTED = PREF_ONLYSELECTED.val
POLYLINES = PREF_POLYLINES.val
ONLYFACES = PREF_ONLYFACES.val
POLYFACES = PREF_POLYFACES.val
FLATTEN = PREF_FLATTEN.val
HIDDEN_MODE = PREF_HIDDEN_MODE.val
SCALE_FACTOR = PREF_SCALE_FACTOR.val
sce = Scene.GetCurrent()
if ONLYSELECTED: sel_group = sce.objects.selected
else: sel_group = sce.objects
if sel_group: do_export(sel_group, filepath)
else:
print "Abort: selection was empty, no object to export!"
Draw.PupMenu('DXF Exporter: nothing exported!|empty selection!')
# Timing the script is a good way to be aware on any speed hits when scripting
#-----------------------------------------------------
if __name__=='__main__':
#main()
if not copy:
Draw.PupMenu('Error%t|This script requires a full python install')
Window.FileSelector(dxf_export_ui, 'EXPORT DXF', sys.makename(ext='.dxf'))
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