-
-
Notifications
You must be signed in to change notification settings - Fork 3.8k
/
exportCSG.py
269 lines (236 loc) · 11.6 KB
/
exportCSG.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
#***************************************************************************
#* *
#* Copyright (c) 2012 Keith Sloan <keith@sloan-home.co.uk> *
#* *
#* 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 *
#* *
#* Acknowledgements : *
#* *
#* Thanks to shoogen on the FreeCAD forum for programming advice *
#* and some code. *
#* *
#***************************************************************************
__title__="FreeCAD OpenSCAD Workbench - CSG exporter Version 0.01c"
__author__ = "Keith Sloan <keith@sloan-home.co.uk>"
__url__ = ["http://www.sloan-home.co.uk/Export/Export.html"]
import FreeCAD, os, Part, math
from FreeCAD import Vector
try: import FreeCADGui
except ValueError: gui = False
else: gui = True
#***************************************************************************
# Tailor following to your requirements ( Should all be strings ) *
global fafs
#fafs = '$fa = 12, $fs = 2'
#convexity = 'convexity = 10'
params = FreeCAD.ParamGet("User parameter:BaseApp/Preferences/Mod/OpenSCAD")
fa = params.GetFloat('exportFa',12.0)
fs = params.GetFloat('exportFs',2.0)
conv = params.GetInt('exportConvexity',10)
fafs = '$fa = %f, $fs = %f' % (fa,fs)
convexity = 'convexity = %d' % conv
#***************************************************************************
if open.__module__ == '__builtin__':
pythonopen = open
def check_center(ob):
# Only say center = false if no rotation and no displacement
if ob.Placement.isNull():
return 'false'
return 'true'
def center(b):
if b == 0 :
return 'false'
return 'true'
def check_multmatrix(csg,ob,x,y,z):
v = FreeCAD.Vector(0,0,1)
b = FreeCAD.Vector(x,y,z)
if ( ob.Placement.Base == FreeCAD.Vector(0,0,0)):
return 0 # center = false no mm
elif not ob.Placement.isNull():
print "Output Multmatrix"
m = ob.Placement.toMatrix()
# adjust position for center displacments
csg.write("multmatrix([["+str(m.A11)+", "+str(m.A12)+", "+str(m.A13)+", "+str(m.A14)+"], ["\
+str(m.A21)+", "+str(m.A22)+", "+str(m.A23)+", "+str(m.A24)+"], ["\
+str(m.A31)+", "+str(m.A32)+", "+str(m.A33)+", "+str(m.A34)+"], [ 0, 0, 0, 1]]){\n")
return 1 # center = true and mm
return 2 # center = true and no mm
def mesh2polyhedron(mesh):
pointstr=','.join(['[%f,%f,%f]' % tuple(vec) for vec in mesh.Topology[0]])
trianglestr=','.join(['[%d,%d,%d]' % tuple(tri) for tri in mesh.Topology[1]])
return 'polyhedron ( points = [%s], triangles = [%s]);' % (pointstr,trianglestr)
def vector2d(v):
return [v[0],v[1]]
def vertexs2polygon(vertex):
pointstr=','.join(['[%f, %f]' % tuple(vector2d(v.Point)) for v in vertex])
return 'polygon ( points = [%s], paths = undef, convexity = 1);}' % pointstr
def shape2polyhedron(shape):
import MeshPart
fa = params.GetFloat('exportFa',12.0)
return mesh2polyhedron(MeshPart.meshFromShape(shape,params.GetFloat(\
'meshmaxlength',1.0), params.GetFloat('meshmaxarea',0.0),\
params.GetFloat('meshlocallen',0.0),\
params.GetFloat('meshdeflection',0.0)))
def process_object(csg,ob):
print "Placement"
print "Pos : "+str(ob.Placement.Base)
print "axis : "+str(ob.Placement.Rotation.Axis)
print "angle : "+str(ob.Placement.Rotation.Angle)
if ob.TypeId == "Part::Sphere" :
print "Sphere Radius : "+str(ob.Radius)
check_multmatrix(csg,ob,0,0,0)
csg.write("sphere($fn = 0, "+fafs+", r = "+str(ob.Radius)+");\n")
elif ob.TypeId == "Part::Box" :
print "cube : ("+ str(ob.Length)+","+str(ob.Width)+","+str(ob.Height)+")"
mm = check_multmatrix(csg,ob,-ob.Length/2,-ob.Width/2,-ob.Height/2)
csg.write("cube (size = ["+str(ob.Length)+", "+str(ob.Width)+", "+str(ob.Height)+"], center = "+center(mm)+");\n")
if mm == 1 : csg.write("}\n")
elif ob.TypeId == "Part::Cylinder" :
print "cylinder : Height "+str(ob.Height)+ " Radius "+str(ob.Radius)
mm = check_multmatrix(csg,ob,0,0,-ob.Height/2)
csg.write("cylinder($fn = 0, "+fafs+", h = "+str(ob.Height)+ ", r1 = "+str(ob.Radius)+\
", r2 = " + str(ob.Radius) + ", center = "+center(mm)+");\n")
if mm == 1 : csg.write("}\n")
elif ob.TypeId == "Part::Cone" :
print "cone : Height "+str(ob.Height)+ " Radius1 "+str(ob.Radius1)+" Radius2 "+str(ob.Radius2)
mm = check_multmatrix(csg,ob,0,0,-ob.Height/2)
csg.write("cylinder($fn = 0, "+fafs+", h = "+str(ob.Height)+ ", r1 = "+str(ob.Radius1)+\
", r2 = "+str(ob.Radius2)+", center = "+center(mm)+");\n")
if mm == 1 : csg.write("}\n")
elif ob.TypeId == "Part::Torus" :
print "Torus"
print ob.Radius1
print ob.Radius2
if ob.Angle3 == 360.00 :
mm = check_multmatrix(csg,ob,0,0,0)
csg.write("rotate_extrude("+convexity+", $fn = 0, "+fafs+")\n")
csg.write("multmatrix([[1, 0, 0, "+str(ob.Radius1)+"], [0, 1, 0, 0], [0, 0, 1, 0], [0, 0, 0, 1]])\n")
csg.write("circle($fn = 0, "+fafs+", r = "+str(ob.Radius2)+");\n")
if mm == 1 : csg.write("}\n")
else : # Cannot convert to rotate extrude so best effort is polyhedron
csg.write('%s\n' % shape2polyhedron(ob.Shape))
elif ob.TypeId == "Part::Prism":
import math
f = str(ob.Polygon)
# r = str(ob.Length/2.0/math.sin(math.pi/ob.Polygon))
r = str(ob.Circumradius) #length seems to be the outer radius
h = str(ob.Height)
mm = check_multmatrix(csg,ob,0,0,-float(h)/2)
csg.write("cylinder($fn = "+f+", "+fafs+", h = "+h+", r1 = "+r+\
", r2 = "+r+", center = "+center(mm)+");\n")
if mm == 1: csg.write("}\n")
elif ob.TypeId == "Part::Extrusion" :
print "Extrusion"
print ob.Base
print ob.Base.Name
if ob.Base.isDerivedFrom('Part::Part2DObjectPython') and \
hasattr(ob.Base,'Proxy') and hasattr(ob.Base.Proxy,'TypeId'):
ptype=ob.Base.Proxy.TypeId
if ptype == "Polygon" :
f = str(ob.Base.FacesNumber)
r = str(ob.Base.Radius)
h = str(ob.Dir[2])
print "Faces : " + f
print "Radius : " + r
print "Height : " + h
mm = check_multmatrix(csg,ob,0,0,-float(h)/2)
csg.write("cylinder($fn = "+f+", "+fafs+", h = "+h+", r1 = "+r+\
", r2 = "+r+", center = "+center(mm)+");\n")
if mm == 1: csg.write("}\n")
elif ptype == "Circle" :
r = str(ob.Base.Radius)
h = str(ob.Dir[2])
print "Radius : " + r
print "Height : " + h
mm = check_multmatrix(csg,ob,0,0,-float(h)/2)
csg.write("cylinder($fn = 0, "+fafs+", h = "+h+", r1 = "+r+\
", r2 = "+r+", center = "+center(mm)+");\n")
if mm == 1: csg.write("}\n")
elif ptype == "Wire" :
print "Wire extrusion"
print ob.Base
mm = check_multmatrix(csg,ob,0,0,0)
csg.write("linear_extrude(height = "+str(ob.Dir[2])+", center = "+center(mm)+", "+convexity+", twist = 0, slices = 2, $fn = 0, "+fafs+")\n{\n")
csg.write(vertexs2polygon(ob.Base.Shape.Vertexes))
if mm == 1: csg.write("}\n")
elif ob.Base.isDerivedFrom('Part::Plane'):
mm = check_multmatrix(csg,ob,0,0,0)
csg.write("linear_extrude(height = "+str(ob.Dir[2])+", center = true, "+convexity+", twist = 0, slices = 2, $fn = 0, "+fafs+")\n{\n")
csg.write("square (size = ["+str(ob.Base.Length)+", "+str(ob.Base.Width)+"],center = "+center(mm)+";\n}\n")
if mm == 1: csg.write("}\n")
elif ob.Base.Name.startswith('this_is_a_bad_idea'):
pass
else:
pass #There should be a fallback solution
elif ob.TypeId == "Part::Cut" :
print "Cut"
csg.write("difference() {\n")
process_object(csg,ob.Base)
process_object(csg,ob.Tool)
csg.write("}\n")
elif ob.TypeId == "Part::Fuse" :
print "union"
csg.write("union() {\n")
process_object(csg,ob.Base)
process_object(csg,ob.Tool)
csg.write("}\n")
elif ob.TypeId == "Part::Common" :
print "intersection"
csg.write("intersection() {\n")
process_object(csg,ob.Base)
process_object(csg,ob.Tool)
csg.write("}\n")
elif ob.TypeId == "Part::MultiFuse" :
print "Multi Fuse / union"
csg.write("union() {\n")
for subobj in ob.Shapes:
process_object(csg,subobj)
csg.write("}\n")
elif ob.TypeId == "Part::Common" :
print "Multi Common / intersection"
csg.write("intersection() {\n")
for subobj in ob.Shapes:
process_object(csg,subobj)
csg.write("}\n")
elif ob.isDerivedFrom('Part::Feature') :
print "Part::Feature"
mm = check_multmatrix(csg,ob,0,0,0)
csg.write('%s\n' % shape2polyhedron(ob.Shape))
if mm == 1 : csg.write("}\n")
def export(exportList,filename):
"called when freecad exports a file"
# process Objects
print "\nStart Export 0.1c\n"
print "Open Output File"
csg = pythonopen(filename,'w')
print "Write Inital Output"
# Not sure if comments as per scad are allowed in csg file
csg.write("// CSG file generated from FreeCAD Export 0.1c\n")
#write initial group statements - not sure if required
csg.write("group() {\n group(){\n")
for ob in exportList:
print ob
print "Name : "+ob.Name
print "Type : "+ob.TypeId
print "Shape : "
print ob.Shape
process_object(csg,ob)
# write closing group braces
csg.write("}\n}\n")
# close file
csg.close()
FreeCAD.Console.PrintMessage("successfully exported "+filename)