Start implementing the CuraEngineBackend

CuraEngineBackend.py

@@ -1,5 +1,71 @@
 from UM.Backend.Backend import Backend
+from UM.Application import Application
+from UM.Scene.SceneNode import SceneNode
+from UM.Scene.Iterator.DepthFirstIterator import DepthFirstIterator
+from UM.Preferences import Preferences
+import threading
+
+import subprocess
+
+CMD_REQUEST_IDENTIFIER = 0x00100000;
+CMD_IDENTIFIER_REPLY = 0x00100001;
+CMD_REQUEST_VERSION = 0x00100002;
+CMD_VERSION_REPLY = 0x00100003;
+
+CMD_SETTING = 0x00100004;
+CMD_MATRIX = 0x00300002;
+CMD_OBJECT_COUNT = 0x00300003;
+CMD_OBJECT_LIST = 0x00200000;
+CMD_MESH_LIST = 0x00200001;
+CMD_VERTEX_LIST = 0x00200002;
+CMD_NORMAL_LIST = 0x00200003;
+CMD_PROCESS_MESH = 0x00300000;
+
+CMD_PROGRESS_REPORT = 0x00300001;
+CMD_OBJECT_PRINT_TIME = 0x00300004;
+CMD_OBJECT_PRINT_MATERIAL = 0x00300005;
+CMD_LAYER_INFO = 0x00300007;
+CMD_POLYGON = 0x00300006;
 
 class CuraEngineBackend(Backend):
     def __init__(self):
-        super(CuraEngineBackend,self).__init__()
+        super().__init__()
+
+        self._scene = Application.getInstance().getController().getScene()
+        self._scene.sceneChanged.connect(self._onSceneChanged)
+
+        self._command_handlers[CMD_IDENTIFIER_REPLY] = self._identifierReply
+        self._command_handlers[CMD_OBJECT_PRINT_TIME] = self._printTimeReply
+
+    def startEngine(self):
+        super().startEngine()
+
+    def getEngineCommand(self):
+        return [Preferences.getPreference("BackendLocation"), '--socket', str(self._socket_thread.getPort()), '--command-socket']
+
+    def _onSceneChanged(self, source):
+        if (type(source) is not SceneNode) or (source is self._scene.getRoot()):
+            return
+
+        objects = []
+        for node in DepthFirstIterator(self._scene.getRoot()):
+            if type(node) is SceneNode and node.getMeshData():
+                objects.append(node)
+
+        self._socket_thread.sendCommand(CMD_OBJECT_COUNT, len(objects))
+
+        for object in objects:
+            print('sending object', object)
+            self._socket_thread.sendCommand(CMD_OBJECT_LIST, 1)
+
+            meshData = object.getMeshData()
+            self._socket_thread.sendCommand(CMD_MESH_LIST, 1)
+            self._socket_thread.sendCommand(CMD_VERTEX_LIST, meshData.getVerticesAsByteArray())
+
+        self._socket_thread.sendCommand(CMD_PROCESS_MESH)
+
+    def _identifierReply(self, data):
+        print(data)
+
+    def _printTimeReply(self, data):
+        print(data)

__init__.py

@@ -1,11 +1,13 @@
 #Shoopdawoop
-from plugins.CuraEngineBackend import CuraEngineBackend
+from . import CuraEngineBackend
+
+from UM.Preferences import Preferences
 
 def getMetaData():
     return { "name": "CuraBackend", "type": "Backend" }
 
 def register(app):
-
-    engine = CuraEngineBackend()
+    Preferences.addPreference("BackendLocation","../PinkUnicornEngine/CuraEngine")
+    engine = CuraEngineBackend.CuraEngineBackend()
     app.setBackend(engine)
     #engine.addCommand(TransferMeshCommand())