First implementation of 3mf reader

plugins/3MFReader/ThreeMFReader.py

@@ -0,0 +1,49 @@
+# Copyright (c) 2015 Ultimaker B.V.
+# Cura is released under the terms of the AGPLv3 or higher.
+
+from UM.Mesh.MeshReader import MeshReader
+from UM.Mesh.MeshData import MeshData
+from UM.Logger import Logger
+from UM.Math.Matrix import Matrix
+from UM.Math.Vector import Vector
+
+import os
+import struct
+import math
+from os import listdir
+import untangle
+import zipfile
+
+class ThreeMFReader(MeshReader):
+    def __init__(self):
+        super(ThreeMFReader, self).__init__()
+        self._supported_extension = ".3mf"
+        
+    def read(self, file_name):
+        extension = os.path.splitext(file_name)[1]
+        if extension.lower() == self._supported_extension:
+            mesh = MeshData()
+            archive = zipfile.ZipFile(file_name, 'r')
+            #print(archive.read("3D/3dmodel.model"))
+            try:
+                object = untangle.parse(archive.read("3D/3dmodel.model").decode("utf-8"))
+                for object in object.model.resources.object:
+                    vertex_list = []
+                    for vertex in object.mesh.vertices.vertex:
+                        vertex_list.append([vertex['x'],vertex['y'],vertex['z']])
+                    
+                    mesh.reserveFaceCount(len(object.mesh.triangles.triangle))
+                    for triangle in object.mesh.triangles.triangle:
+                        v1 = int(triangle["v1"])
+                        v2 = int(triangle["v2"])
+                        v3 = int(triangle["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])
+                    #if not mesh.hasNormals():
+                    mesh.calculateNormals()
+                    
+                    return mesh
+                    #object.mesh.vertices
+                    #object.mesh.triangles
+                    
+            except Exception as e:
+                print(e)