mirror of
https://git.mirrors.martin98.com/https://github.com/Ultimaker/Cura
synced 2025-04-21 05:09:37 +08:00
247 lines
10 KiB
Python
Executable File
247 lines
10 KiB
Python
Executable File
# Copyright (c) 2018 Ultimaker B.V.
|
|
# Cura is released under the terms of the LGPLv3 or higher.
|
|
|
|
import os.path
|
|
import zipfile
|
|
|
|
import numpy
|
|
|
|
import Savitar
|
|
|
|
from UM.Application import Application
|
|
from UM.Logger import Logger
|
|
from UM.Math.Matrix import Matrix
|
|
from UM.Math.Vector import Vector
|
|
from UM.Mesh.MeshBuilder import MeshBuilder
|
|
from UM.Mesh.MeshReader import MeshReader
|
|
from UM.Scene.GroupDecorator import GroupDecorator
|
|
|
|
from cura.Settings.ExtruderManager import ExtruderManager
|
|
from cura.Scene.CuraSceneNode import CuraSceneNode
|
|
from cura.Scene.BuildPlateDecorator import BuildPlateDecorator
|
|
from cura.Scene.SliceableObjectDecorator import SliceableObjectDecorator
|
|
from cura.Scene.ZOffsetDecorator import ZOffsetDecorator
|
|
from cura.Machines.QualityManager import getMachineDefinitionIDForQualitySearch
|
|
|
|
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
|
|
|
|
## Base implementation for reading 3MF files. Has no support for textures. Only loads meshes!
|
|
class ThreeMFReader(MeshReader):
|
|
def __init__(self):
|
|
super().__init__()
|
|
self._supported_extensions = [".3mf"]
|
|
self._root = None
|
|
self._base_name = ""
|
|
self._unit = None
|
|
self._object_count = 0 # Used to name objects as there is no node name yet.
|
|
|
|
def _createMatrixFromTransformationString(self, transformation):
|
|
if transformation == "":
|
|
return Matrix()
|
|
|
|
splitted_transformation = transformation.split()
|
|
## Transformation is saved as:
|
|
## M00 M01 M02 0.0
|
|
## M10 M11 M12 0.0
|
|
## M20 M21 M22 0.0
|
|
## M30 M31 M32 1.0
|
|
## We switch the row & cols as that is how everyone else uses matrices!
|
|
temp_mat = Matrix()
|
|
# Rotation & Scale
|
|
temp_mat._data[0, 0] = splitted_transformation[0]
|
|
temp_mat._data[1, 0] = splitted_transformation[1]
|
|
temp_mat._data[2, 0] = splitted_transformation[2]
|
|
temp_mat._data[0, 1] = splitted_transformation[3]
|
|
temp_mat._data[1, 1] = splitted_transformation[4]
|
|
temp_mat._data[2, 1] = splitted_transformation[5]
|
|
temp_mat._data[0, 2] = splitted_transformation[6]
|
|
temp_mat._data[1, 2] = splitted_transformation[7]
|
|
temp_mat._data[2, 2] = splitted_transformation[8]
|
|
|
|
# Translation
|
|
temp_mat._data[0, 3] = splitted_transformation[9]
|
|
temp_mat._data[1, 3] = splitted_transformation[10]
|
|
temp_mat._data[2, 3] = splitted_transformation[11]
|
|
|
|
return temp_mat
|
|
|
|
## Convenience function that converts a SceneNode object (as obtained from libSavitar) to a Uranium scene node.
|
|
# \returns Uranium scene node.
|
|
def _convertSavitarNodeToUMNode(self, savitar_node):
|
|
self._object_count += 1
|
|
node_name = "Object %s" % self._object_count
|
|
|
|
active_build_plate = Application.getInstance().getMultiBuildPlateModel().activeBuildPlate
|
|
|
|
um_node = CuraSceneNode() # This adds a SettingOverrideDecorator
|
|
um_node.addDecorator(BuildPlateDecorator(active_build_plate))
|
|
um_node.setName(node_name)
|
|
transformation = self._createMatrixFromTransformationString(savitar_node.getTransformation())
|
|
um_node.setTransformation(transformation)
|
|
mesh_builder = MeshBuilder()
|
|
|
|
data = numpy.fromstring(savitar_node.getMeshData().getFlatVerticesAsBytes(), dtype=numpy.float32)
|
|
|
|
vertices = numpy.resize(data, (int(data.size / 3), 3))
|
|
mesh_builder.setVertices(vertices)
|
|
mesh_builder.calculateNormals(fast=True)
|
|
mesh_data = mesh_builder.build()
|
|
|
|
if len(mesh_data.getVertices()):
|
|
um_node.setMeshData(mesh_data)
|
|
|
|
for child in savitar_node.getChildren():
|
|
child_node = self._convertSavitarNodeToUMNode(child)
|
|
if child_node:
|
|
um_node.addChild(child_node)
|
|
|
|
if um_node.getMeshData() is None and len(um_node.getChildren()) == 0:
|
|
return None
|
|
|
|
settings = savitar_node.getSettings()
|
|
|
|
# Add the setting override decorator, so we can add settings to this node.
|
|
if settings:
|
|
global_container_stack = Application.getInstance().getGlobalContainerStack()
|
|
|
|
# Ensure the correct next container for the SettingOverride decorator is set.
|
|
if global_container_stack:
|
|
default_stack = ExtruderManager.getInstance().getExtruderStack(0)
|
|
|
|
if default_stack:
|
|
um_node.callDecoration("setActiveExtruder", default_stack.getId())
|
|
|
|
# Get the definition & set it
|
|
definition_id = getMachineDefinitionIDForQualitySearch(global_container_stack.definition)
|
|
um_node.callDecoration("getStack").getTop().setDefinition(definition_id)
|
|
|
|
setting_container = um_node.callDecoration("getStack").getTop()
|
|
|
|
for key in settings:
|
|
setting_value = settings[key]
|
|
|
|
# Extruder_nr is a special case.
|
|
if key == "extruder_nr":
|
|
extruder_stack = ExtruderManager.getInstance().getExtruderStack(int(setting_value))
|
|
if extruder_stack:
|
|
um_node.callDecoration("setActiveExtruder", extruder_stack.getId())
|
|
else:
|
|
Logger.log("w", "Unable to find extruder in position %s", setting_value)
|
|
continue
|
|
setting_container.setProperty(key, "value", setting_value)
|
|
|
|
if len(um_node.getChildren()) > 0 and um_node.getMeshData() is None:
|
|
group_decorator = GroupDecorator()
|
|
um_node.addDecorator(group_decorator)
|
|
um_node.setSelectable(True)
|
|
if um_node.getMeshData():
|
|
# Assuming that all nodes with mesh data are printable objects
|
|
# affects (auto) slicing
|
|
sliceable_decorator = SliceableObjectDecorator()
|
|
um_node.addDecorator(sliceable_decorator)
|
|
return um_node
|
|
|
|
def read(self, file_name):
|
|
result = []
|
|
self._object_count = 0 # Used to name objects as there is no node name yet.
|
|
# The base object of 3mf is a zipped archive.
|
|
try:
|
|
archive = zipfile.ZipFile(file_name, "r")
|
|
self._base_name = os.path.basename(file_name)
|
|
parser = Savitar.ThreeMFParser()
|
|
scene_3mf = parser.parse(archive.open("3D/3dmodel.model").read())
|
|
self._unit = scene_3mf.getUnit()
|
|
for node in scene_3mf.getSceneNodes():
|
|
um_node = self._convertSavitarNodeToUMNode(node)
|
|
if um_node is None:
|
|
continue
|
|
# compensate for original center position, if object(s) is/are not around its zero position
|
|
|
|
transform_matrix = Matrix()
|
|
mesh_data = um_node.getMeshData()
|
|
if mesh_data is not None:
|
|
extents = mesh_data.getExtents()
|
|
center_vector = Vector(extents.center.x, extents.center.y, extents.center.z)
|
|
transform_matrix.setByTranslation(center_vector)
|
|
transform_matrix.multiply(um_node.getLocalTransformation())
|
|
um_node.setTransformation(transform_matrix)
|
|
|
|
global_container_stack = Application.getInstance().getGlobalContainerStack()
|
|
|
|
# Create a transformation Matrix to convert from 3mf worldspace into ours.
|
|
# First step: flip the y and z axis.
|
|
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
|
|
|
|
# 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.multiply(translation_matrix)
|
|
|
|
# Third step: 3MF also defines a unit, whereas Cura always assumes mm.
|
|
scale_matrix = Matrix()
|
|
scale_matrix.setByScaleVector(self._getScaleFromUnit(self._unit))
|
|
transformation_matrix.multiply(scale_matrix)
|
|
|
|
# Pre multiply the transformation with the loaded transformation, so the data is handled correctly.
|
|
um_node.setTransformation(um_node.getLocalTransformation().preMultiply(transformation_matrix))
|
|
|
|
# Check if the model is positioned below the build plate and honor that when loading project files.
|
|
if um_node.getMeshData() is not None:
|
|
minimum_z_value = um_node.getMeshData().getExtents(um_node.getWorldTransformation()).minimum.y # y is z in transformation coordinates
|
|
if minimum_z_value < 0:
|
|
um_node.addDecorator(ZOffsetDecorator())
|
|
um_node.callDecoration("setZOffset", minimum_z_value)
|
|
|
|
result.append(um_node)
|
|
|
|
except Exception:
|
|
Logger.logException("e", "An exception occurred in 3mf reader.")
|
|
return []
|
|
|
|
return result
|
|
|
|
## Create a scale vector based on a unit string.
|
|
# The core spec defines the following:
|
|
# * micron
|
|
# * millimeter (default)
|
|
# * centimeter
|
|
# * inch
|
|
# * foot
|
|
# * meter
|
|
def _getScaleFromUnit(self, unit):
|
|
if unit is None:
|
|
unit = "millimeter"
|
|
if unit == "micron":
|
|
scale = 0.001
|
|
elif unit == "millimeter":
|
|
scale = 1
|
|
elif unit == "centimeter":
|
|
scale = 10
|
|
elif unit == "inch":
|
|
scale = 25.4
|
|
elif unit == "foot":
|
|
scale = 304.8
|
|
elif unit == "meter":
|
|
scale = 1000
|
|
else:
|
|
Logger.log("w", "Unrecognised unit %s used. Assuming mm instead", unit)
|
|
scale = 1
|
|
|
|
return Vector(scale, scale, scale)
|