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
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
|
# ##### 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#
# ##### END GPL LICENSE BLOCK #####
# <pep8-80 compliant>
bl_info = {
"name": "STL format",
"author": "Guillaume Bouchard (Guillaum)",
"version": (1, 1, 3),
"blender": (2, 81, 6),
"location": "File > Import-Export",
"description": "Import-Export STL files",
"doc_url": "{BLENDER_MANUAL_URL}/addons/import_export/mesh_stl.html",
"support": 'OFFICIAL',
"category": "Import-Export",
}
# @todo write the wiki page
"""
Import-Export STL files (binary or ascii)
- Import automatically remove the doubles.
- Export can export with/without modifiers applied
Issues:
Import:
- Does not handle endian
"""
if "bpy" in locals():
import importlib
if "stl_utils" in locals():
importlib.reload(stl_utils)
if "blender_utils" in locals():
importlib.reload(blender_utils)
import bpy
from bpy.props import (
StringProperty,
BoolProperty,
CollectionProperty,
EnumProperty,
FloatProperty,
)
from bpy_extras.io_utils import (
ImportHelper,
ExportHelper,
orientation_helper,
axis_conversion,
)
from bpy.types import (
Operator,
OperatorFileListElement,
)
@orientation_helper(axis_forward='Y', axis_up='Z')
class ImportSTL(Operator, ImportHelper):
bl_idname = "import_mesh.stl"
bl_label = "Import STL"
bl_description = "Load STL triangle mesh data"
bl_options = {'UNDO'}
filename_ext = ".stl"
filter_glob: StringProperty(
default="*.stl",
options={'HIDDEN'},
)
files: CollectionProperty(
name="File Path",
type=OperatorFileListElement,
)
directory: StringProperty(
subtype='DIR_PATH',
)
global_scale: FloatProperty(
name="Scale",
soft_min=0.001, soft_max=1000.0,
min=1e-6, max=1e6,
default=1.0,
)
use_scene_unit: BoolProperty(
name="Scene Unit",
description="Apply current scene's unit (as defined by unit scale) to imported data",
default=False,
)
use_facet_normal: BoolProperty(
name="Facet Normals",
description="Use (import) facet normals (note that this will still give flat shading)",
default=False,
)
def execute(self, context):
import os
from mathutils import Matrix
from . import stl_utils
from . import blender_utils
paths = [os.path.join(self.directory, name.name) for name in self.files]
scene = context.scene
# Take into account scene's unit scale, so that 1 inch in Blender gives 1 inch elsewhere! See T42000.
global_scale = self.global_scale
if scene.unit_settings.system != 'NONE' and self.use_scene_unit:
global_scale /= scene.unit_settings.scale_length
global_matrix = axis_conversion(
from_forward=self.axis_forward,
from_up=self.axis_up,
).to_4x4() @ Matrix.Scale(global_scale, 4)
if not paths:
paths.append(self.filepath)
if bpy.ops.object.mode_set.poll():
bpy.ops.object.mode_set(mode='OBJECT')
if bpy.ops.object.select_all.poll():
bpy.ops.object.select_all(action='DESELECT')
for path in paths:
objName = bpy.path.display_name_from_filepath(path)
tris, tri_nors, pts = stl_utils.read_stl(path)
tri_nors = tri_nors if self.use_facet_normal else None
blender_utils.create_and_link_mesh(objName, tris, tri_nors, pts, global_matrix)
return {'FINISHED'}
def draw(self, context):
pass
class STL_PT_import_transform(bpy.types.Panel):
bl_space_type = 'FILE_BROWSER'
bl_region_type = 'TOOL_PROPS'
bl_label = "Transform"
bl_parent_id = "FILE_PT_operator"
@classmethod
def poll(cls, context):
sfile = context.space_data
operator = sfile.active_operator
return operator.bl_idname == "IMPORT_MESH_OT_stl"
def draw(self, context):
layout = self.layout
layout.use_property_split = True
layout.use_property_decorate = False # No animation.
sfile = context.space_data
operator = sfile.active_operator
layout.prop(operator, "global_scale")
layout.prop(operator, "use_scene_unit")
layout.prop(operator, "axis_forward")
layout.prop(operator, "axis_up")
class STL_PT_import_geometry(bpy.types.Panel):
bl_space_type = 'FILE_BROWSER'
bl_region_type = 'TOOL_PROPS'
bl_label = "Geometry"
bl_parent_id = "FILE_PT_operator"
@classmethod
def poll(cls, context):
sfile = context.space_data
operator = sfile.active_operator
return operator.bl_idname == "IMPORT_MESH_OT_stl"
def draw(self, context):
layout = self.layout
layout.use_property_split = True
layout.use_property_decorate = False # No animation.
sfile = context.space_data
operator = sfile.active_operator
layout.prop(operator, "use_facet_normal")
@orientation_helper(axis_forward='Y', axis_up='Z')
class ExportSTL(Operator, ExportHelper):
bl_idname = "export_mesh.stl"
bl_label = "Export STL"
bl_description = """Save STL triangle mesh data"""
filename_ext = ".stl"
filter_glob: StringProperty(default="*.stl", options={'HIDDEN'})
use_selection: BoolProperty(
name="Selection Only",
description="Export selected objects only",
default=False,
)
global_scale: FloatProperty(
name="Scale",
min=0.01, max=1000.0,
default=1.0,
)
use_scene_unit: BoolProperty(
name="Scene Unit",
description="Apply current scene's unit (as defined by unit scale) to exported data",
default=False,
)
ascii: BoolProperty(
name="Ascii",
description="Save the file in ASCII file format",
default=False,
)
use_mesh_modifiers: BoolProperty(
name="Apply Modifiers",
description="Apply the modifiers before saving",
default=True,
)
batch_mode: EnumProperty(
name="Batch Mode",
items=(
('OFF', "Off", "All data in one file"),
('OBJECT', "Object", "Each object as a file"),
),
)
@property
def check_extension(self):
return self.batch_mode == 'OFF'
def execute(self, context):
import os
import itertools
from mathutils import Matrix
from . import stl_utils
from . import blender_utils
keywords = self.as_keywords(
ignore=(
"axis_forward",
"axis_up",
"use_selection",
"global_scale",
"check_existing",
"filter_glob",
"use_scene_unit",
"use_mesh_modifiers",
"batch_mode"
),
)
scene = context.scene
if self.use_selection:
data_seq = context.selected_objects
else:
data_seq = scene.objects
# Take into account scene's unit scale, so that 1 inch in Blender gives 1 inch elsewhere! See T42000.
global_scale = self.global_scale
if scene.unit_settings.system != 'NONE' and self.use_scene_unit:
global_scale *= scene.unit_settings.scale_length
global_matrix = axis_conversion(
to_forward=self.axis_forward,
to_up=self.axis_up,
).to_4x4() @ Matrix.Scale(global_scale, 4)
if self.batch_mode == 'OFF':
faces = itertools.chain.from_iterable(
blender_utils.faces_from_mesh(ob, global_matrix, self.use_mesh_modifiers)
for ob in data_seq)
stl_utils.write_stl(faces=faces, **keywords)
elif self.batch_mode == 'OBJECT':
prefix = os.path.splitext(self.filepath)[0]
keywords_temp = keywords.copy()
for ob in data_seq:
faces = blender_utils.faces_from_mesh(ob, global_matrix, self.use_mesh_modifiers)
keywords_temp["filepath"] = prefix + bpy.path.clean_name(ob.name) + ".stl"
stl_utils.write_stl(faces=faces, **keywords_temp)
return {'FINISHED'}
def draw(self, context):
pass
class STL_PT_export_main(bpy.types.Panel):
bl_space_type = 'FILE_BROWSER'
bl_region_type = 'TOOL_PROPS'
bl_label = ""
bl_parent_id = "FILE_PT_operator"
bl_options = {'HIDE_HEADER'}
@classmethod
def poll(cls, context):
sfile = context.space_data
operator = sfile.active_operator
return operator.bl_idname == "EXPORT_MESH_OT_stl"
def draw(self, context):
layout = self.layout
layout.use_property_split = True
layout.use_property_decorate = False # No animation.
sfile = context.space_data
operator = sfile.active_operator
layout.prop(operator, "ascii")
layout.prop(operator, "batch_mode")
class STL_PT_export_include(bpy.types.Panel):
bl_space_type = 'FILE_BROWSER'
bl_region_type = 'TOOL_PROPS'
bl_label = "Include"
bl_parent_id = "FILE_PT_operator"
@classmethod
def poll(cls, context):
sfile = context.space_data
operator = sfile.active_operator
return operator.bl_idname == "EXPORT_MESH_OT_stl"
def draw(self, context):
layout = self.layout
layout.use_property_split = True
layout.use_property_decorate = False # No animation.
sfile = context.space_data
operator = sfile.active_operator
layout.prop(operator, "use_selection")
class STL_PT_export_transform(bpy.types.Panel):
bl_space_type = 'FILE_BROWSER'
bl_region_type = 'TOOL_PROPS'
bl_label = "Transform"
bl_parent_id = "FILE_PT_operator"
@classmethod
def poll(cls, context):
sfile = context.space_data
operator = sfile.active_operator
return operator.bl_idname == "EXPORT_MESH_OT_stl"
def draw(self, context):
layout = self.layout
layout.use_property_split = True
layout.use_property_decorate = False # No animation.
sfile = context.space_data
operator = sfile.active_operator
layout.prop(operator, "global_scale")
layout.prop(operator, "use_scene_unit")
layout.prop(operator, "axis_forward")
layout.prop(operator, "axis_up")
class STL_PT_export_geometry(bpy.types.Panel):
bl_space_type = 'FILE_BROWSER'
bl_region_type = 'TOOL_PROPS'
bl_label = "Geometry"
bl_parent_id = "FILE_PT_operator"
@classmethod
def poll(cls, context):
sfile = context.space_data
operator = sfile.active_operator
return operator.bl_idname == "EXPORT_MESH_OT_stl"
def draw(self, context):
layout = self.layout
layout.use_property_split = True
layout.use_property_decorate = False # No animation.
sfile = context.space_data
operator = sfile.active_operator
layout.prop(operator, "use_mesh_modifiers")
def menu_import(self, context):
self.layout.operator(ImportSTL.bl_idname, text="Stl (.stl)")
def menu_export(self, context):
self.layout.operator(ExportSTL.bl_idname, text="Stl (.stl)")
classes = (
ImportSTL,
STL_PT_import_transform,
STL_PT_import_geometry,
ExportSTL,
STL_PT_export_main,
STL_PT_export_include,
STL_PT_export_transform,
STL_PT_export_geometry,
)
def register():
for cls in classes:
bpy.utils.register_class(cls)
bpy.types.TOPBAR_MT_file_import.append(menu_import)
bpy.types.TOPBAR_MT_file_export.append(menu_export)
def unregister():
for cls in classes:
bpy.utils.unregister_class(cls)
bpy.types.TOPBAR_MT_file_import.remove(menu_import)
bpy.types.TOPBAR_MT_file_export.remove(menu_export)
if __name__ == "__main__":
register()
|