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Port 3MFReader to ETree

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This commit is contained in:
Arjen Hiemstra 2015-08-18 17:15:35 +02:00
parent 85a13b7ad7
commit a2ecae7d2c
1 changed files with 33 additions and 21 deletions
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46
plugins/3MFReader/ThreeMFReader.py
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@ -15,9 +15,9 @@ import os
import struct import struct
import math import math
from os import listdir from os import listdir
import untangle
import zipfile import zipfile
import xml.etree.ElementTree as ET
## Base implementation for reading 3MF files. Has no support for textures. Only loads meshes! ## Base implementation for reading 3MF files. Has no support for textures. Only loads meshes!
class ThreeMFReader(MeshReader): class ThreeMFReader(MeshReader):
@ -25,6 +25,11 @@ class ThreeMFReader(MeshReader):
super(ThreeMFReader, self).__init__() super(ThreeMFReader, self).__init__()
self._supported_extension = ".3mf" self._supported_extension = ".3mf"
self._namespaces = {
"3mf": "http://schemas.microsoft.com/3dmanufacturing/core/2015/02",
"cura": "http://software.ultimaker.com/xml/cura/3mf/2015/10"
}
def read(self, file_name): def read(self, file_name):
result = None result = None
extension = os.path.splitext(file_name)[1] extension = os.path.splitext(file_name)[1]
@ -33,32 +38,39 @@ class ThreeMFReader(MeshReader):
# The base object of 3mf is a zipped archive. # The base object of 3mf is a zipped archive.
archive = zipfile.ZipFile(file_name, 'r') archive = zipfile.ZipFile(file_name, 'r')
try: try:
# The model is always stored in this place. root = ET.parse(archive.open("3D/3dmodel.model"))
root = untangle.parse(archive.read("3D/3dmodel.model").decode("utf-8"))
for object in root.model.resources.object: # There can be multiple objects, try to load all of them. # There can be multiple objects, try to load all of them.
objects = root.findall("./3mf:resources/3mf:object", self._namespaces)
for object in objects:
mesh = MeshData() mesh = MeshData()
node = SceneNode() node = SceneNode()
vertex_list = [] vertex_list = []
for vertex in object.mesh.vertices.vertex: #for vertex in object.mesh.vertices.vertex:
vertex_list.append([vertex['x'],vertex['y'],vertex['z']]) for vertex in object.findall(".//3mf:vertex", self._namespaces):
vertex_list.append([vertex.get("x"), vertex.get("y"), vertex.get("z")])
mesh.reserveFaceCount(len(object.mesh.triangles.triangle)) triangles = object.findall(".//3mf:triangle", self._namespaces)
for triangle in object.mesh.triangles.triangle: mesh.reserveFaceCount(len(triangles))
v1 = int(triangle["v1"])
v2 = int(triangle["v2"]) #for triangle in object.mesh.triangles.triangle:
v3 = int(triangle["v3"]) for triangle in triangles:
v1 = int(triangle.get("v1"))
v2 = int(triangle.get("v2"))
v3 = int(triangle.get("v3"))
mesh.addFace(vertex_list[v1][0],vertex_list[v1][1],vertex_list[v1][2],vertex_list[v2][0],vertex_list[v2][1],vertex_list[v2][2],vertex_list[v3][0],vertex_list[v3][1],vertex_list[v3][2]) mesh.addFace(vertex_list[v1][0],vertex_list[v1][1],vertex_list[v1][2],vertex_list[v2][0],vertex_list[v2][1],vertex_list[v2][2],vertex_list[v3][0],vertex_list[v3][1],vertex_list[v3][2])
#TODO: We currently do not check for normals and simply recalculate them. #TODO: We currently do not check for normals and simply recalculate them.
mesh.calculateNormals() mesh.calculateNormals()
node.setMeshData(mesh) node.setMeshData(mesh)
node.setSelectable(True) node.setSelectable(True)
# Magical python comprehension; looks for the matching transformation transformation = root.findall("./3mf:build/3mf:item[@objectid='{0}']".format(object.get("id")), self._namespaces)
transformation = next((x for x in root.model.build.item if x["objectid"] == object["id"]), None) if transformation:
transformation = transformation[0]
if transformation["transform"]: if transformation.get("transform"):
splitted_transformation = transformation["transform"].split() splitted_transformation = transformation.get("transform").split()
## Transformation is saved as: ## Transformation is saved as:
## M00 M01 M02 0.0 ## M00 M01 M02 0.0
## M10 M11 M12 0.0 ## M10 M11 M12 0.0
@ -100,9 +112,9 @@ class ThreeMFReader(MeshReader):
node.rotate(rotation) node.rotate(rotation)
result.addChild(node) result.addChild(node)
# If there is more then one object, group them. #If there is more then one object, group them.
try: try:
if len(root.model.resources.object) > 1: if len(objects) > 1:
group_decorator = GroupDecorator() group_decorator = GroupDecorator()
result.addDecorator(group_decorator) result.addDecorator(group_decorator)
except: except: