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
|
# Copyright (c) 2015-2022 Ultimaker B.V.
# Cura is released under the terms of the LGPLv3 or higher.
from typing import Optional
from UM.Mesh.MeshWriter import MeshWriter
from UM.Math.Vector import Vector
from UM.Logger import Logger
from UM.Math.Matrix import Matrix
from UM.Application import Application
from UM.Scene.SceneNode import SceneNode
from cura.CuraApplication import CuraApplication
from cura.Utils.Threading import call_on_qt_thread
from cura.Snapshot import Snapshot
from PyQt6.QtCore import QBuffer
import pySavitar as Savitar
import numpy
import datetime
MYPY = False
try:
if not MYPY:
import xml.etree.cElementTree as ET
except ImportError:
Logger.log("w", "Unable to load cElementTree, switching to slower version")
import xml.etree.ElementTree as ET
import zipfile
import UM.Application
from UM.i18n import i18nCatalog
catalog = i18nCatalog("cura")
class ThreeMFWriter(MeshWriter):
def __init__(self):
super().__init__()
self._namespaces = {
"3mf": "http://schemas.microsoft.com/3dmanufacturing/core/2015/02",
"content-types": "http://schemas.openxmlformats.org/package/2006/content-types",
"relationships": "http://schemas.openxmlformats.org/package/2006/relationships",
"cura": "http://software.ultimaker.com/xml/cura/3mf/2015/10"
}
self._unit_matrix_string = self._convertMatrixToString(Matrix())
self._archive = None # type: Optional[zipfile.ZipFile]
self._store_archive = False
def _convertMatrixToString(self, matrix):
result = ""
result += str(matrix._data[0, 0]) + " "
result += str(matrix._data[1, 0]) + " "
result += str(matrix._data[2, 0]) + " "
result += str(matrix._data[0, 1]) + " "
result += str(matrix._data[1, 1]) + " "
result += str(matrix._data[2, 1]) + " "
result += str(matrix._data[0, 2]) + " "
result += str(matrix._data[1, 2]) + " "
result += str(matrix._data[2, 2]) + " "
result += str(matrix._data[0, 3]) + " "
result += str(matrix._data[1, 3]) + " "
result += str(matrix._data[2, 3])
return result
def setStoreArchive(self, store_archive):
"""Should we store the archive
Note that if this is true, the archive will not be closed.
The object that set this parameter is then responsible for closing it correctly!
"""
self._store_archive = store_archive
def _convertUMNodeToSavitarNode(self, um_node, transformation = Matrix()):
"""Convenience function that converts an Uranium SceneNode object to a SavitarSceneNode
:returns: Uranium Scene node.
"""
if not isinstance(um_node, SceneNode):
return None
active_build_plate_nr = CuraApplication.getInstance().getMultiBuildPlateModel().activeBuildPlate
if um_node.callDecoration("getBuildPlateNumber") != active_build_plate_nr:
return
savitar_node = Savitar.SceneNode()
savitar_node.setName(um_node.getName())
node_matrix = um_node.getLocalTransformation()
matrix_string = self._convertMatrixToString(node_matrix.preMultiply(transformation))
savitar_node.setTransformation(matrix_string)
mesh_data = um_node.getMeshData()
if mesh_data is not None:
savitar_node.getMeshData().setVerticesFromBytes(mesh_data.getVerticesAsByteArray())
indices_array = mesh_data.getIndicesAsByteArray()
if indices_array is not None:
savitar_node.getMeshData().setFacesFromBytes(indices_array)
else:
savitar_node.getMeshData().setFacesFromBytes(numpy.arange(mesh_data.getVertices().size / 3, dtype=numpy.int32).tostring())
# Handle per object settings (if any)
stack = um_node.callDecoration("getStack")
if stack is not None:
changed_setting_keys = stack.getTop().getAllKeys()
# Ensure that we save the extruder used for this object in a multi-extrusion setup
if stack.getProperty("machine_extruder_count", "value") > 1:
changed_setting_keys.add("extruder_nr")
# Get values for all changed settings & save them.
for key in changed_setting_keys:
savitar_node.setSetting("cura:" + key, str(stack.getProperty(key, "value")))
# Store the metadata.
for key, value in um_node.metadata.items():
savitar_node.setSetting(key, value)
for child_node in um_node.getChildren():
# only save the nodes on the active build plate
if child_node.callDecoration("getBuildPlateNumber") != active_build_plate_nr:
continue
savitar_child_node = self._convertUMNodeToSavitarNode(child_node)
if savitar_child_node is not None:
savitar_node.addChild(savitar_child_node)
return savitar_node
def getArchive(self):
return self._archive
def write(self, stream, nodes, mode = MeshWriter.OutputMode.BinaryMode):
self._archive = None # Reset archive
archive = zipfile.ZipFile(stream, "w", compression = zipfile.ZIP_DEFLATED)
try:
model_file = zipfile.ZipInfo("3D/3dmodel.model")
# Because zipfile is stupid and ignores archive-level compression settings when writing with ZipInfo.
model_file.compress_type = zipfile.ZIP_DEFLATED
# Create content types file
content_types_file = zipfile.ZipInfo("[Content_Types].xml")
content_types_file.compress_type = zipfile.ZIP_DEFLATED
content_types = ET.Element("Types", xmlns = self._namespaces["content-types"])
rels_type = ET.SubElement(content_types, "Default", Extension = "rels", ContentType = "application/vnd.openxmlformats-package.relationships+xml")
model_type = ET.SubElement(content_types, "Default", Extension = "model", ContentType = "application/vnd.ms-package.3dmanufacturing-3dmodel+xml")
# Create _rels/.rels file
relations_file = zipfile.ZipInfo("_rels/.rels")
relations_file.compress_type = zipfile.ZIP_DEFLATED
relations_element = ET.Element("Relationships", xmlns = self._namespaces["relationships"])
model_relation_element = ET.SubElement(relations_element, "Relationship", Target = "/3D/3dmodel.model", Id = "rel0", Type = "http://schemas.microsoft.com/3dmanufacturing/2013/01/3dmodel")
# Attempt to add a thumbnail
snapshot = self._createSnapshot()
if snapshot:
thumbnail_buffer = QBuffer()
thumbnail_buffer.open(QBuffer.OpenModeFlag.ReadWrite)
snapshot.save(thumbnail_buffer, "PNG")
thumbnail_file = zipfile.ZipInfo("Metadata/thumbnail.png")
# Don't try to compress snapshot file, because the PNG is pretty much as compact as it will get
archive.writestr(thumbnail_file, thumbnail_buffer.data())
# Add PNG to content types file
thumbnail_type = ET.SubElement(content_types, "Default", Extension = "png", ContentType = "image/png")
# Add thumbnail relation to _rels/.rels file
thumbnail_relation_element = ET.SubElement(relations_element, "Relationship", Target = "/Metadata/thumbnail.png", Id = "rel1", Type = "http://schemas.openxmlformats.org/package/2006/relationships/metadata/thumbnail")
savitar_scene = Savitar.Scene()
metadata_to_store = CuraApplication.getInstance().getController().getScene().getMetaData()
for key, value in metadata_to_store.items():
savitar_scene.setMetaDataEntry(key, value)
current_time_string = datetime.datetime.now().strftime("%Y-%m-%d %H:%M:%S")
if "Application" not in metadata_to_store:
# This might sound a bit strange, but this field should store the original application that created
# the 3mf. So if it was already set, leave it to whatever it was.
savitar_scene.setMetaDataEntry("Application", CuraApplication.getInstance().getApplicationDisplayName())
if "CreationDate" not in metadata_to_store:
savitar_scene.setMetaDataEntry("CreationDate", current_time_string)
savitar_scene.setMetaDataEntry("ModificationDate", current_time_string)
transformation_matrix = Matrix()
transformation_matrix._data[1, 1] = 0
transformation_matrix._data[1, 2] = -1
transformation_matrix._data[2, 1] = 1
transformation_matrix._data[2, 2] = 0
global_container_stack = Application.getInstance().getGlobalContainerStack()
# Second step: 3MF defines the left corner of the machine as center, whereas cura uses the center of the
# build volume.
if global_container_stack:
translation_vector = Vector(x=global_container_stack.getProperty("machine_width", "value") / 2,
y=global_container_stack.getProperty("machine_depth", "value") / 2,
z=0)
translation_matrix = Matrix()
translation_matrix.setByTranslation(translation_vector)
transformation_matrix.preMultiply(translation_matrix)
root_node = UM.Application.Application.getInstance().getController().getScene().getRoot()
for node in nodes:
if node == root_node:
for root_child in node.getChildren():
savitar_node = self._convertUMNodeToSavitarNode(root_child, transformation_matrix)
if savitar_node:
savitar_scene.addSceneNode(savitar_node)
else:
savitar_node = self._convertUMNodeToSavitarNode(node, transformation_matrix)
if savitar_node:
savitar_scene.addSceneNode(savitar_node)
parser = Savitar.ThreeMFParser()
scene_string = parser.sceneToString(savitar_scene)
archive.writestr(model_file, scene_string)
archive.writestr(content_types_file, b'<?xml version="1.0" encoding="UTF-8"?> \n' + ET.tostring(content_types))
archive.writestr(relations_file, b'<?xml version="1.0" encoding="UTF-8"?> \n' + ET.tostring(relations_element))
except Exception as e:
Logger.logException("e", "Error writing zip file")
self.setInformation(catalog.i18nc("@error:zip", "Error writing 3mf file."))
return False
finally:
if not self._store_archive:
archive.close()
else:
self._archive = archive
return True
@call_on_qt_thread # must be called from the main thread because of OpenGL
def _createSnapshot(self):
Logger.log("d", "Creating thumbnail image...")
if not CuraApplication.getInstance().isVisible:
Logger.log("w", "Can't create snapshot when renderer not initialized.")
return None
try:
snapshot = Snapshot.snapshot(width = 300, height = 300)
except:
Logger.logException("w", "Failed to create snapshot image")
return None
return snapshot
|
