__copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AGPLv3 License"

import wx
import wx.lib.inspection
import numpy
import time
import os
import traceback
import threading
import math
import sys
import cStringIO as StringIO

import OpenGL
OpenGL.ERROR_CHECKING = False
from OpenGL.GLU import *
from OpenGL.GL import *

from Cura.gui import printWindow
from Cura.util import profile
from Cura.util import meshLoader
from Cura.util import objectScene
from Cura.util import resources
from Cura.util import sliceEngine
from Cura.util import pluginInfo
from Cura.util import removableStorage
from Cura.util import explorer
from Cura.util.printerConnection import printerConnectionManager
from Cura.gui.util import previewTools
from Cura.gui.util import openglHelpers
from Cura.gui.util import openglGui
from Cura.gui.util import engineResultView
from Cura.gui.tools import youmagineGui
from Cura.gui.tools import imageToMesh

class SceneView(openglGui.glGuiPanel):
	def __init__(self, parent):
		super(SceneView, self).__init__(parent)

		self._yaw = 30
		self._pitch = 60
		self._zoom = 300
		self._scene = objectScene.Scene(self)
		self._objectShader = None
		self._objectLoadShader = None
		self._focusObj = None
		self._selectedObj = None
		self._objColors = [None,None,None,None]
		self._mouseX = -1
		self._mouseY = -1
		self._mouseState = None
		self._viewTarget = numpy.array([0,0,0], numpy.float32)
		self._mouse3Dpos = numpy.array([0,0,0], numpy.float32)
		self._animView = None
		self._animZoom = None
		self._lastObjectSink = None
		self._platformMesh = {}
		self.glReleaseList = []
		self._platformTexture = None
		self._isSimpleMode = True
		self._printerConnectionManager = printerConnectionManager.PrinterConnectionManager()

		self._viewport = None
		self._modelMatrix = None
		self._projMatrix = None
		self.tempMatrix = None

		self.openFileButton      = openglGui.glButton(self, 4, _("Load"), (0,0), self.showLoadModel)
		self.printButton         = openglGui.glButton(self, 6, _("Print"), (1,0), self.OnPrintButton)
		self.printButton.setDisabled(True)

		group = []
		self.rotateToolButton = openglGui.glRadioButton(self, 8, _("Rotate"), (0,-1), group, self.OnToolSelect)
		self.scaleToolButton  = openglGui.glRadioButton(self, 9, _("Scale"), (1,-1), group, self.OnToolSelect)
		self.mirrorToolButton  = openglGui.glRadioButton(self, 10, _("Mirror"), (2,-1), group, self.OnToolSelect)

		self.resetRotationButton = openglGui.glButton(self, 12, _("Reset"), (0,-2), self.OnRotateReset)
		self.layFlatButton       = openglGui.glButton(self, 16, _("Lay flat"), (0,-3), self.OnLayFlat)

		self.resetScaleButton    = openglGui.glButton(self, 13, _("Reset"), (1,-2), self.OnScaleReset)
		self.scaleMaxButton      = openglGui.glButton(self, 17, _("To max"), (1,-3), self.OnScaleMax)

		self.mirrorXButton       = openglGui.glButton(self, 14, _("Mirror X"), (2,-2), lambda button: self.OnMirror(0))
		self.mirrorYButton       = openglGui.glButton(self, 18, _("Mirror Y"), (2,-3), lambda button: self.OnMirror(1))
		self.mirrorZButton       = openglGui.glButton(self, 22, _("Mirror Z"), (2,-4), lambda button: self.OnMirror(2))

		self.rotateToolButton.setExpandArrow(True)
		self.scaleToolButton.setExpandArrow(True)
		self.mirrorToolButton.setExpandArrow(True)

		self.scaleForm = openglGui.glFrame(self, (2, -2))
		openglGui.glGuiLayoutGrid(self.scaleForm)
		openglGui.glLabel(self.scaleForm, _("Scale X"), (0,0))
		self.scaleXctrl = openglGui.glNumberCtrl(self.scaleForm, '1.0', (1,0), lambda value: self.OnScaleEntry(value, 0))
		openglGui.glLabel(self.scaleForm, _("Scale Y"), (0,1))
		self.scaleYctrl = openglGui.glNumberCtrl(self.scaleForm, '1.0', (1,1), lambda value: self.OnScaleEntry(value, 1))
		openglGui.glLabel(self.scaleForm, _("Scale Z"), (0,2))
		self.scaleZctrl = openglGui.glNumberCtrl(self.scaleForm, '1.0', (1,2), lambda value: self.OnScaleEntry(value, 2))
		openglGui.glLabel(self.scaleForm, _("Size X (mm)"), (0,4))
		self.scaleXmmctrl = openglGui.glNumberCtrl(self.scaleForm, '0.0', (1,4), lambda value: self.OnScaleEntryMM(value, 0))
		openglGui.glLabel(self.scaleForm, _("Size Y (mm)"), (0,5))
		self.scaleYmmctrl = openglGui.glNumberCtrl(self.scaleForm, '0.0', (1,5), lambda value: self.OnScaleEntryMM(value, 1))
		openglGui.glLabel(self.scaleForm, _("Size Z (mm)"), (0,6))
		self.scaleZmmctrl = openglGui.glNumberCtrl(self.scaleForm, '0.0', (1,6), lambda value: self.OnScaleEntryMM(value, 2))
		openglGui.glLabel(self.scaleForm, _("Uniform scale"), (0,8))
		self.scaleUniform = openglGui.glCheckbox(self.scaleForm, True, (1,8), None)

		self.viewSelection = openglGui.glComboButton(self, _("View mode"), 7, [26,19,11,15,23], [_("Normal"), _("Overhang"), _("Transparent"), _("X-Ray"), _("Layers")], (-1,0), self.OnViewChange, self.OnViewStateChange)
		self.viewSelection.setDisabled(True)
		#self.youMagineButton = openglGui.glButton(self, 26, _("Share on YouMagine"), (2,0), lambda button: youmagineGui.youmagineManager(self.GetTopLevelParent(), self._scene))
		#self.youMagineButton.setDisabled(True)

		self.notification = openglGui.glNotification(self, (0, 0))

		self._engine = sliceEngine.Engine(self._updateEngineProgress)
		self._engineResultView = engineResultView.engineResultView(self)
		self._sceneUpdateTimer = wx.Timer(self)
		self.Bind(wx.EVT_TIMER, self._onRunEngine, self._sceneUpdateTimer)
		self.Bind(wx.EVT_MOUSEWHEEL, self.OnMouseWheel)
		self.Bind(wx.EVT_LEAVE_WINDOW, self.OnMouseLeave)

		self.OnViewChange()
		self.OnToolSelect(0)
		self.updateToolButtons()
		self.updateProfileToControls()

	def cleanup(self):
		# Delete all objects first
		self.OnDeleteAll(None)
		self._engine.cleanup()
		if self._objectShader is not None:
			self._objectShader.release()
		if self._objectLoadShader is not None:
			self._objectLoadShader.release()
		if self._objectOverhangShader is not None:
			self._objectOverhangShader.release()
		for obj in self.glReleaseList:
			obj.release()

	def loadGCodeFile(self, filename):
		self.OnDeleteAll(None)
		#Cheat the engine results to load a GCode file into it.
		self._engine._result = sliceEngine.EngineResult()
		with open(filename, "r") as f:
			self._engine._result.setGCode(f.read())
		self._engine._result.setFinished(True)
		self._engineResultView.setResult(self._engine._result)
		self.printButton.setBottomText('')
		self.viewSelection.setDisabled(False)
		self.viewSelection.setValue(4)
		self.printButton.setDisabled(False)
		#self.youMagineButton.setDisabled(True)
		self.OnViewChange()

	def loadSceneFiles(self, filenames):
		#self.youMagineButton.setDisabled(False)
		#if self.viewSelection.getValue() == 4:
		#	self.viewSelection.setValue(0)
		#	self.OnViewChange()
		self.loadScene(filenames)

	def loadFiles(self, filenames):
		mainWindow = self.GetTopLevelParent()
		# only one GCODE file can be active
		# so if single gcode file, process this
		# otherwise ignore all gcode files
		gcodeFilename = None
		if len(filenames) == 1:
			filename = filenames[0]
			ext = os.path.splitext(filename)[1].lower()
			if ext == '.g' or ext == '.gcode':
				gcodeFilename = filename
				mainWindow.addToModelMRU(filename)
		if gcodeFilename is not None:
			self.loadGCodeFile(gcodeFilename)
		else:
			# process directories and special file types
			# and keep scene files for later processing
			scene_filenames = []
			ignored_types = dict()
			# use file list as queue
			# pop first entry for processing and append new files at end
			while filenames:
				filename = filenames.pop(0)
				if os.path.isdir(filename):
					# directory: queue all included files and directories
					filenames.extend(os.path.join(filename, f) for f in os.listdir(filename))
				else:
					ext = os.path.splitext(filename)[1].lower()
					if ext == '.ini':
						profile.loadProfile(filename)
						mainWindow.addToProfileMRU(filename)
					elif ext in meshLoader.loadSupportedExtensions() or ext in imageToMesh.supportedExtensions():
						scene_filenames.append(filename)
						mainWindow.addToModelMRU(filename)
					else:
						ignored_types[ext] = 1
			if ignored_types:
				ignored_types = ignored_types.keys()
				ignored_types.sort()
				self.notification.message(_("ignored: ") + " ".join("*" + type for type in ignored_types))
			mainWindow.updateProfileToAllControls()
			# now process all the scene files
			if scene_filenames:
				self.loadSceneFiles(scene_filenames)
				self._selectObject(None)
				self.sceneUpdated()
				newZoom = numpy.max(self._machineSize)
				self._animView = openglGui.animation(self, self._viewTarget.copy(), numpy.array([0,0,0], numpy.float32), 0.5)
				self._animZoom = openglGui.animation(self, self._zoom, newZoom, 0.5)

	def reloadScene(self, e):
		# Copy the list before DeleteAll clears it
		fileList = []
		pms_transforms = [] #position, rotation matrix, scale
		for obj in self._scene.objects():
			fileList.append(obj.getOriginFilename())
			pms_transforms.append((obj.getPosition(), obj.getMatrix(), obj.getScale()))

		self.OnDeleteAll(None)
		self.loadScene(fileList, pms_transforms)

	def OnResetPositions(self, e):

		self._scene.arrangeAll(True)
		self._scene.centerAll()
		self.sceneUpdated()


	def OnResetTransformations(self, e):
		for obj in self._scene.objects():
			obj.resetScale()
			obj.resetRotation()

		self._scene.arrangeAll()
		self._scene.centerAll()
		self.sceneUpdated()

	def showLoadModel(self, button = 1):
		if button == 1:
			dlg=wx.FileDialog(self, _("Open 3D model"), os.path.split(profile.getPreference('lastFile'))[0], style=wx.FD_OPEN|wx.FD_FILE_MUST_EXIST|wx.FD_MULTIPLE)

			wildcardList = ';'.join(map(lambda s: '*' + s, meshLoader.loadSupportedExtensions() + imageToMesh.supportedExtensions() + ['.g', '.gcode']))
			wildcardFilter = "All (%s)|%s;%s" % (wildcardList, wildcardList, wildcardList.upper())
			wildcardList = ';'.join(map(lambda s: '*' + s, meshLoader.loadSupportedExtensions()))
			wildcardFilter += "|Mesh files (%s)|%s;%s" % (wildcardList, wildcardList, wildcardList.upper())
			wildcardList = ';'.join(map(lambda s: '*' + s, imageToMesh.supportedExtensions()))
			wildcardFilter += "|Image files (%s)|%s;%s" % (wildcardList, wildcardList, wildcardList.upper())
			wildcardList = ';'.join(map(lambda s: '*' + s, ['.g', '.gcode']))
			wildcardFilter += "|GCode files (%s)|%s;%s" % (wildcardList, wildcardList, wildcardList.upper())

			dlg.SetWildcard(wildcardFilter)
			if dlg.ShowModal() != wx.ID_OK:
				dlg.Destroy()
				return
			filenames = dlg.GetPaths()
			dlg.Destroy()
			if len(filenames) < 1:
				return False
			profile.putPreference('lastFile', filenames[0])
			self.loadFiles(filenames)

	def showSaveModel(self):
		if len(self._scene.objects()) < 1:
			return
		dlg=wx.FileDialog(self, _("Save 3D model"), os.path.split(profile.getPreference('lastFile'))[0], style=wx.FD_SAVE|wx.FD_OVERWRITE_PROMPT)
		fileExtensions = meshLoader.saveSupportedExtensions()
		wildcardList = ';'.join(map(lambda s: '*' + s, fileExtensions))
		wildcardFilter = "Mesh files (%s)|%s;%s" % (wildcardList, wildcardList, wildcardList.upper())
		dlg.SetWildcard(wildcardFilter)
		if dlg.ShowModal() != wx.ID_OK:
			dlg.Destroy()
			return
		filename = dlg.GetPath()
		dlg.Destroy()
		meshLoader.saveMeshes(filename, self._scene.objects())

	def OnPrintButton(self, button):
		if button == 1:
			connectionGroup = self._printerConnectionManager.getAvailableGroup()
			if len(removableStorage.getPossibleSDcardDrives()) > 0 and (connectionGroup is None or connectionGroup.getPriority() < 0):
				drives = removableStorage.getPossibleSDcardDrives()
				if len(drives) > 1:
					choices = map(lambda n: n[0], drives)
					choices += (_("Custom file destination"), )
					title = _("Multiple removable drives have been found")
				else:
					choices = [drives[0][0], _("Custom file destination")]
					title = _("A removable drive has been found")

				dlg = wx.SingleChoiceDialog(self, _("Select destination SD card drive\nYou can also select a custom file to save to"), title, choices)
				if dlg.ShowModal() != wx.ID_OK:
					dlg.Destroy()
					return
				try:
					drive = drives[dlg.GetSelection()]
				except:
					drive = None
				dlg.Destroy()

				if drive is None:
					self.showSaveGCode()
				else:
					filename = self._scene._objectList[0].getName() + profile.getGCodeExtension()

					#check if the file is part of the root folder.
					# If so, create folders on sd card to get the same folder hierarchy.
					repDir = profile.getPreference("sdcard_rootfolder")
					try:
						if os.path.exists(repDir) and os.path.isdir(repDir):
							repDir = os.path.abspath(repDir)
							originFilename = os.path.abspath( self._scene._objectList[0].getOriginFilename() )
							if os.path.dirname(originFilename).startswith(repDir):
								new_filename = os.path.splitext(originFilename[len(repDir):])[0] + profile.getGCodeExtension()
								sdPath = os.path.dirname(os.path.join( drive[1], new_filename))
								if not os.path.exists(sdPath):
									print "Creating replication directory:", sdPath
									os.makedirs(sdPath)
								filename = new_filename
					except:
						pass

					threading.Thread(target=self._saveGCode,args=(drive[1] + filename, drive[1])).start()
			elif connectionGroup is not None:
				connections = connectionGroup.getAvailableConnections()
				if len(connections) < 2:
					connection = connections[0]
				else:
					dlg = wx.SingleChoiceDialog(self, _("Select the %s connection to use") % (connectionGroup.getName()), _("Multiple %s connections found") % (connectionGroup.getName()), map(lambda n: n.getName(), connections))
					if dlg.ShowModal() != wx.ID_OK:
						dlg.Destroy()
						return
					connection = connections[dlg.GetSelection()]
					dlg.Destroy()
				self._openPrintWindowForConnection(connection)
			else:
				self.showSaveGCode()
		if button == 3:
			menu = wx.Menu()
			connections = self._printerConnectionManager.getAvailableConnections()
			menu.connectionMap = {}
			for connection in connections:
				i = menu.Append(-1, _("Print with %s") % (connection.getName()))
				menu.connectionMap[i.GetId()] = connection
				self.Bind(wx.EVT_MENU, lambda e: self._openPrintWindowForConnection(e.GetEventObject().connectionMap[e.GetId()]), i)
			self.Bind(wx.EVT_MENU, lambda e: self.showSaveGCode(), menu.Append(-1, _("Save GCode...")))
			self.Bind(wx.EVT_MENU, lambda e: self._showEngineLog(), menu.Append(-1, _("Slice engine log...")))
			self.PopupMenu(menu)
			menu.Destroy()

	def _openPrintWindowForConnection(self, connection):
		if connection.window is None or not connection.window:
			connection.window = printWindow.printWindowAdvanced(self, connection)

		connection.window.Show()
		connection.window.Raise()
		if not connection.loadGCodeData(self._engine.getResult().getGCode()):
			if connection.isPrinting():
				self.notification.message(_("Cannot start print, because other print still running."))
			else:
				self.notification.message(_("Failed to start print..."))

	def showSaveGCode(self):
		if len(self._scene._objectList) < 1:
			return
		if not self._engine.getResult().isFinished():
			return
		dlg=wx.FileDialog(self, _("Save toolpath"), os.path.dirname(profile.getPreference('lastFile')), style=wx.FD_SAVE|wx.FD_OVERWRITE_PROMPT)
		filename = self._scene._objectList[0].getName() + profile.getGCodeExtension()
		dlg.SetFilename(filename)
		dlg.SetWildcard('Toolpath (*%s)|*%s;*%s' % (profile.getGCodeExtension(), profile.getGCodeExtension(), profile.getGCodeExtension()[0:2]))
		if dlg.ShowModal() != wx.ID_OK:
			dlg.Destroy()
			return
		filename = dlg.GetPath()
		dlg.Destroy()

		threading.Thread(target=self._saveGCode,args=(filename,)).start()

	def _saveGCode(self, targetFilename, ejectDrive = False):
		gcode = self._engine.getResult().getGCode()
		try:
			size = float(len(gcode))
			read_pos = 0
			with open(targetFilename, 'wb') as fdst:
				while 1:
					buf = gcode.read(16*1024)
					if len(buf) < 1:
						break
					read_pos += len(buf)
					fdst.write(buf)
					self.printButton.setProgressBar(read_pos / size)
					self._queueRefresh()
		except:
			import sys, traceback
			traceback.print_exc()
			self.notification.message(_("Failed to save"))
		else:
			if ejectDrive:
				self.notification.message(_("Saved as %s") % (targetFilename), lambda : self._doEjectSD(ejectDrive), 31, 'Eject')
			elif explorer.hasExplorer():
				self.notification.message(_("Saved as %s") % (targetFilename), lambda : explorer.openExplorer(targetFilename), 4, _('Open folder'))
			else:
				self.notification.message(_("Saved as %s") % (targetFilename))
		self.printButton.setProgressBar(None)

	def _doEjectSD(self, drive):
		if removableStorage.ejectDrive(drive):
			self.notification.message(_('You can now eject the card.'))
		else:
			self.notification.message(_('Safe remove failed...'))

	def _showEngineLog(self):
		dlg = wx.TextEntryDialog(self, _("The slicing engine reported the following"), _("Engine log..."), '\n'.join(self._engine.getResult().getLog()), wx.TE_MULTILINE | wx.OK | wx.CENTRE)
		dlg.ShowModal()
		dlg.Destroy()

	def OnToolSelect(self, button):
		if self.rotateToolButton.getSelected():
			self.tool = previewTools.toolRotate(self)
		elif self.scaleToolButton.getSelected():
			self.tool = previewTools.toolScale(self)
		elif self.mirrorToolButton.getSelected():
			self.tool = previewTools.toolNone(self)
		else:
			self.tool = previewTools.toolNone(self)
		self.resetRotationButton.setHidden(not self.rotateToolButton.getSelected())
		self.layFlatButton.setHidden(not self.rotateToolButton.getSelected())
		self.resetScaleButton.setHidden(not self.scaleToolButton.getSelected())
		self.scaleMaxButton.setHidden(not self.scaleToolButton.getSelected())
		self.scaleForm.setHidden(not self.scaleToolButton.getSelected())
		self.mirrorXButton.setHidden(not self.mirrorToolButton.getSelected())
		self.mirrorYButton.setHidden(not self.mirrorToolButton.getSelected())
		self.mirrorZButton.setHidden(not self.mirrorToolButton.getSelected())

	def updateToolButtons(self):
		if self._selectedObj is None:
			hidden = True
		else:
			hidden = False
		self.rotateToolButton.setHidden(hidden)
		self.scaleToolButton.setHidden(hidden)
		self.mirrorToolButton.setHidden(hidden)
		if hidden:
			self.rotateToolButton.setSelected(False)
			self.scaleToolButton.setSelected(False)
			self.mirrorToolButton.setSelected(False)
			self.OnToolSelect(0)

	def OnViewChange(self):
		if self.viewSelection.getValue() == 4:
			self.viewMode = 'gcode'
			self.tool = previewTools.toolNone(self)
		elif self.viewSelection.getValue() == 1:
			self.viewMode = 'overhang'
		elif self.viewSelection.getValue() == 2:
			self.viewMode = 'transparent'
		elif self.viewSelection.getValue() == 3:
			self.viewMode = 'xray'
		else:
			self.viewMode = 'normal'
		self._engineResultView.setEnabled(self.viewMode == 'gcode')
		self.QueueRefresh()

	def OnViewStateChange(self, state):
		self._engineResultView.layerSelect.setHidden(self.viewMode != 'gcode' or state)
		self._engineResultView.singleLayerToggle.setHidden(self.viewMode != 'gcode' or state)

	def OnRotateReset(self, button):
		if self._selectedObj is None:
			return
		self._selectedObj.resetRotation()
		self._scene.pushFree(self._selectedObj)
		self._selectObject(self._selectedObj)
		self.sceneUpdated()

	def OnLayFlat(self, button):
		if self._selectedObj is None:
			return
		self._selectedObj.layFlat()
		self._scene.pushFree(self._selectedObj)
		self._selectObject(self._selectedObj)
		self.sceneUpdated()

	def OnScaleReset(self, button):
		if self._selectedObj is None:
			return
		self._selectedObj.resetScale()
		self._selectObject(self._selectedObj)
		self.updateProfileToControls()
		self.sceneUpdated()

	def OnScaleMax(self, button):
		if self._selectedObj is None:
			return
		machine = profile.getMachineSetting('machine_type')
		self._selectedObj.setPosition(numpy.array([0.0, 0.0]))
		self._scene.pushFree(self._selectedObj)
		#self.sceneUpdated()
		if machine == "ultimaker2":
			#This is bad and Jaime should feel bad!
			self._selectedObj.setPosition(numpy.array([0.0,-10.0]))
			self._selectedObj.scaleUpTo(self._machineSize - numpy.array(profile.calculateObjectSizeOffsets() + [0.0], numpy.float32) * 2 - numpy.array([3,3,3], numpy.float32))
			self._selectedObj.setPosition(numpy.array([0.0,0.0]))
			self._scene.pushFree(self._selectedObj)
		else:
			self._selectedObj.setPosition(numpy.array([0.0, 0.0]))
			self._scene.pushFree(self._selectedObj)
			self._selectedObj.scaleUpTo(self._machineSize - numpy.array(profile.calculateObjectSizeOffsets() + [0.0], numpy.float32) * 2 - numpy.array([3,3,3], numpy.float32))
		self._scene.pushFree(self._selectedObj)
		self._selectObject(self._selectedObj)
		self.updateProfileToControls()
		self.sceneUpdated()

	def OnMirror(self, axis):
		if self._selectedObj is None:
			return
		self._selectedObj.mirror(axis)
		self.sceneUpdated()

	def OnScaleEntry(self, value, axis):
		if self._selectedObj is None:
			return
		try:
			value = float(value)
		except:
			return
		self._selectedObj.setScale(value, axis, self.scaleUniform.getValue())
		self.updateProfileToControls()
		self._scene.pushFree(self._selectedObj)
		self._selectObject(self._selectedObj)
		self.sceneUpdated()

	def OnScaleEntryMM(self, value, axis):
		if self._selectedObj is None:
			return
		try:
			value = float(value)
		except:
			return
		self._selectedObj.setSize(value, axis, self.scaleUniform.getValue())
		self.updateProfileToControls()
		self._scene.pushFree(self._selectedObj)
		self._selectObject(self._selectedObj)
		self.sceneUpdated()

	def OnDeleteAll(self, e):
		while len(self._scene.objects()) > 0:
			self._deleteObject(self._scene.objects()[0])
		self._animView = openglGui.animation(self, self._viewTarget.copy(), numpy.array([0,0,0], numpy.float32), 0.5)
		self._engineResultView.setResult(None)
		self.viewSelection.setDisabled(True)
		self.printButton.setDisabled(True)

	def OnMultiply(self, e):
		if self._focusObj is None:
			return
		obj = self._focusObj
		dlg = wx.NumberEntryDialog(self, _("How many copies do you want?"), _("Number of copies"), _("Multiply"), 1, 1, 100)
		if dlg.ShowModal() != wx.ID_OK:
			dlg.Destroy()
			return
		cnt = dlg.GetValue()
		dlg.Destroy()

		# 0:unrequested arrange all. Objects should not move.
		# 1:requested arrange all but refused.
		# 2:arrange all and center from now on.
		requestedArrangeAll = 0

		n = 0
		while True:
			n += 1
			newObj = obj.copy()
			self._scene.add(newObj)
			if requestedArrangeAll == 2:
				self._scene.centerAll()

			if not self._scene.checkPlatform(newObj):
				if requestedArrangeAll == 0:
					requestedArrangeAll = 1
					dlg = wx.MessageDialog(self, _("Cannot fit all the requested duplicates. Do you want to try and reset object positions?"), _("Reset Positions"), wx.YES_NO)

					if dlg.ShowModal() == wx.ID_YES:
						dlg.Destroy()
						requestedArrangeAll = 2
						self._scene.remove(newObj)
						self.OnResetPositions(None)
						n -= 1
						continue

					dlg.Destroy()

				break
			if n > cnt:
				break
		if n <= cnt:
			self.notification.message(_("Could not create more than %d items") % (n - 1))
		self._scene.remove(newObj)
		if requestedArrangeAll == 2:
			self._scene.centerAll()

		self.sceneUpdated()

	def OnSplitObject(self, e):
		if self._focusObj is None:
			return
		self._scene.remove(self._focusObj)
		for obj in self._focusObj.split(self._splitCallback):
			if numpy.max(obj.getSize()) > 2.0:
				self._scene.add(obj)
		self._scene.centerAll()
		self._selectObject(None)
		self.sceneUpdated()

	def OnCenter(self, e):
		if self._focusObj is None:
			return
		self._focusObj.setPosition(numpy.array([0.0, 0.0]))
		self._scene.pushFree(self._selectedObj)
		newViewPos = numpy.array([self._focusObj.getPosition()[0], self._focusObj.getPosition()[1], self._focusObj.getSize()[2] / 2])
		self._animView = openglGui.animation(self, self._viewTarget.copy(), newViewPos, 0.5)
		self.sceneUpdated()

	def _splitCallback(self, progress):
		pass

	def OnMergeObjects(self, e):
		if self._selectedObj is None or self._focusObj is None or self._selectedObj == self._focusObj:
			if len(self._scene.objects()) == 2:
				self._scene.merge(self._scene.objects()[0], self._scene.objects()[1])
				self.sceneUpdated()
			return
		self._scene.merge(self._selectedObj, self._focusObj)
		self.sceneUpdated()

	def getObjectSink(self):
		if self._isSimpleMode:
			return float(profile.settingsDictionary["object_sink"].getDefault())
		else:
			return profile.getProfileSettingFloat("object_sink")

	def sceneUpdated(self):
		objectSink = self.getObjectSink()
		if self._lastObjectSink != objectSink:
			self._lastObjectSink = objectSink
			self._scene.updateHeadSize()

		wx.CallAfter(self._sceneUpdateTimer.Start, 500, True)
		self._engine.abortEngine()
		self._scene.updateSizeOffsets()
		self.QueueRefresh()

	def _onRunEngine(self, e):
		if self._isSimpleMode:
			self._engine.runEngine(self._scene, self.GetTopLevelParent().simpleSettingsPanel.getSettingOverrides())
		else:
			self._engine.runEngine(self._scene)

	def _updateEngineProgress(self, progressValue):
		result = self._engine.getResult()
		finished = result is not None and result.isFinished()
		if not finished:
			if self.printButton.getProgressBar() is not None and progressValue >= 0.0 and abs(self.printButton.getProgressBar() - progressValue) < 0.01:
				return
		self.printButton.setDisabled(not finished)
		self.viewSelection.setDisabled(not finished)
		if progressValue >= 0.0:
			self.printButton.setProgressBar(progressValue)
		else:
			self.printButton.setProgressBar(None)
		self._engineResultView.setResult(result)
		if finished:
			self.printButton.setProgressBar(None)
			text = '%s' % (result.getPrintTime())
			for e in xrange(0, int(profile.getMachineSetting('extruder_amount'))):
				amount = result.getFilamentAmount(e)
				if amount is None:
					continue
				text += '\n%s' % (amount)
				cost = result.getFilamentCost(e)
				if cost is not None:
					text += '\n%s' % (cost)
			self.printButton.setBottomText(text)
		else:
			self.printButton.setBottomText('')
		self.QueueRefresh()

	def loadScene(self, fileList, pms_transforms=None):
		objIndex = -1
		for filename in fileList:
			objIndex += 1
			try:
				ext = os.path.splitext(filename)[1].lower()
				if ext in imageToMesh.supportedExtensions():
					imageToMesh.convertImageDialog(self, filename).Show()
					objList = []
				else:
					objList = meshLoader.loadMeshes(filename)
			except:
				traceback.print_exc()
			else:
				for obj in objList:
					if self._objectLoadShader is not None:
						obj._loadAnim = openglGui.animation(self, 1, 0, 1.5)
					else:
						obj._loadAnim = None
					self._scene.add(obj)
					if pms_transforms is not None and len(pms_transforms) == len(fileList):
						obj.setPosition(pms_transforms[objIndex][0])
						obj.applyMatrix(pms_transforms[objIndex][1])
						obj.setScale(pms_transforms[objIndex][2][0], 0, False)
						obj.setScale(pms_transforms[objIndex][2][1], 1, False)
						obj.setScale(pms_transforms[objIndex][2][2], 2, False)
					else:
						if not self._scene.checkPlatform(obj):
							self._scene.centerAll()
						self._selectObject(obj)
						if obj.getScale()[0] < 1.0:
							self.notification.message(_("Warning: Object scaled down."))
		self.sceneUpdated()

	def _deleteObject(self, obj):
		if obj == self._selectedObj:
			self._selectObject(None)
		if obj == self._focusObj:
			self._focusObj = None
		self._scene.remove(obj)
		for m in obj._meshList:
			if m.vbo is not None and m.vbo.decRef():
				self.glReleaseList.append(m.vbo)
		if len(self._scene.objects()) == 0:
			self._engineResultView.setResult(None)
			self.printButton.setDisabled(True)
			self.viewSelection.setDisabled(True)
			self.printButton.setBottomText('')
		import gc
		gc.collect()
		self.sceneUpdated()

	def _selectObject(self, obj, zoom = True):
		if obj != self._selectedObj:
			self._selectedObj = obj
			self.updateModelSettingsToControls()
			self.updateToolButtons()
		if zoom and obj is not None:
			newViewPos = numpy.array([obj.getPosition()[0], obj.getPosition()[1], obj.getSize()[2] / 2])
			self._animView = openglGui.animation(self, self._viewTarget.copy(), newViewPos, 0.5)
			newZoom = obj.getBoundaryCircle() * 6
			if newZoom > numpy.max(self._machineSize) * 3:
				newZoom = numpy.max(self._machineSize) * 3
			self._animZoom = openglGui.animation(self, self._zoom, newZoom, 0.5)

	def updateProfileToControls(self):
		oldSimpleMode = self._isSimpleMode
		self._isSimpleMode = profile.getPreference('startMode') == 'Simple'
		if self._isSimpleMode != oldSimpleMode:
			self._scene.arrangeAll()
			self.sceneUpdated()
		self._scene.updateSizeOffsets(True)
		self._machineSize = numpy.array([profile.getMachineSettingFloat('machine_width'), profile.getMachineSettingFloat('machine_depth'), profile.getMachineSettingFloat('machine_height')])
		self._objColors[0] = profile.getPreferenceColour('model_colour')
		self._objColors[1] = profile.getPreferenceColour('model_colour2')
		self._objColors[2] = profile.getPreferenceColour('model_colour3')
		self._objColors[3] = profile.getPreferenceColour('model_colour4')
		self._scene.updateMachineDimensions()
		if self._zoom > numpy.max(self._machineSize) * 3:
			self._animZoom = openglGui.animation(self, self._zoom, numpy.max(self._machineSize) * 3, 0.5)
		self.updateModelSettingsToControls()

	def updateModelSettingsToControls(self):
		if self._selectedObj is not None:
			scale = self._selectedObj.getScale()
			size = self._selectedObj.getSize()
			self.scaleXctrl.setValue(round(scale[0], 2))
			self.scaleYctrl.setValue(round(scale[1], 2))
			self.scaleZctrl.setValue(round(scale[2], 2))
			self.scaleXmmctrl.setValue(round(size[0], 2))
			self.scaleYmmctrl.setValue(round(size[1], 2))
			self.scaleZmmctrl.setValue(round(size[2], 2))

	def OnKeyChar(self, keyCode):
		if self._engineResultView.OnKeyChar(keyCode):
			return True
		if keyCode == wx.WXK_DELETE or keyCode == wx.WXK_NUMPAD_DELETE or (keyCode == wx.WXK_BACK and sys.platform.startswith("darwin")):
			if self._selectedObj is not None:
				self._deleteObject(self._selectedObj)
				self.QueueRefresh()
			return True
		if keyCode == wx.WXK_UP:
			if wx.GetKeyState(wx.WXK_SHIFT):
				self._zoom /= 1.2
				if self._zoom < 1:
					self._zoom = 1
			else:
				self._pitch -= 15
			self.QueueRefresh()
			return True
		elif keyCode == wx.WXK_DOWN:
			if wx.GetKeyState(wx.WXK_SHIFT):
				self._zoom *= 1.2
				if self._zoom > numpy.max(self._machineSize) * 3:
					self._zoom = numpy.max(self._machineSize) * 3
			else:
				self._pitch += 15
			self.QueueRefresh()
			return True
		elif keyCode == wx.WXK_LEFT:
			self._yaw -= 15
			self.QueueRefresh()
			return True
		elif keyCode == wx.WXK_RIGHT:
			self._yaw += 15
			self.QueueRefresh()
			return True
		elif keyCode == wx.WXK_NUMPAD_ADD or keyCode == wx.WXK_ADD or keyCode == ord('+') or keyCode == ord('='):
			self._zoom /= 1.2
			if self._zoom < 1:
				self._zoom = 1
			self.QueueRefresh()
			return True
		elif keyCode == wx.WXK_NUMPAD_SUBTRACT or keyCode == wx.WXK_SUBTRACT or keyCode == ord('-'):
			self._zoom *= 1.2
			if self._zoom > numpy.max(self._machineSize) * 3:
				self._zoom = numpy.max(self._machineSize) * 3
			self.QueueRefresh()
			return True
		elif keyCode == wx.WXK_HOME:
			self._yaw = 30
			self._pitch = 60
			self.QueueRefresh()
			return True
		elif keyCode == wx.WXK_PAGEUP:
			self._yaw = 0
			self._pitch = 0
			self.QueueRefresh()
			return True
		elif keyCode == wx.WXK_PAGEDOWN:
			self._yaw = 0
			self._pitch = 90
			self.QueueRefresh()
			return True
		elif keyCode == wx.WXK_END:
			self._yaw = 90
			self._pitch = 90
			self.QueueRefresh()
			return True

		if keyCode == wx.WXK_F3 and wx.GetKeyState(wx.WXK_SHIFT):
			shaderEditor(self, self.ShaderUpdate, self._objectLoadShader.getVertexShader(), self._objectLoadShader.getFragmentShader())
			return True
		if keyCode == wx.WXK_F4 and wx.GetKeyState(wx.WXK_SHIFT):
			from collections import defaultdict
			from gc import get_objects
			self._beforeLeakTest = defaultdict(int)
			for i in get_objects():
				self._beforeLeakTest[type(i)] += 1
			return True
		if keyCode == wx.WXK_F6 and wx.GetKeyState(wx.WXK_SHIFT):
			# Show the WX widget inspection tool
			wx.lib.inspection.InspectionTool().Show()
			return True
		if keyCode == wx.WXK_F5 and wx.GetKeyState(wx.WXK_SHIFT):
			from collections import defaultdict
			from gc import get_objects
			self._afterLeakTest = defaultdict(int)
			for i in get_objects():
				self._afterLeakTest[type(i)] += 1
			for k in self._afterLeakTest:
				if self._afterLeakTest[k]-self._beforeLeakTest[k]:
					print k, self._afterLeakTest[k], self._beforeLeakTest[k], self._afterLeakTest[k] - self._beforeLeakTest[k]
			return True

	def ShaderUpdate(self, v, f):
		s = openglHelpers.GLShader(v, f)
		if s.isValid():
			self._objectLoadShader.release()
			self._objectLoadShader = s
			for obj in self._scene.objects():
				obj._loadAnim = openglGui.animation(self, 1, 0, 1.5)
			self.QueueRefresh()

	def OnMouseDown(self,e):
		self._mouseX = e.GetX()
		self._mouseY = e.GetY()
		self._mouseClick3DPos = self._mouse3Dpos
		self._mouseClickFocus = self._focusObj
		if e.ButtonDClick():
			self._mouseState = 'doubleClick'
		else:
			if self._mouseState == 'dragObject' and self._selectedObj is not None:
				self._scene.pushFree(self._selectedObj)
				self.sceneUpdated()
			self._mouseState = 'dragOrClick'
		p0, p1 = self.getMouseRay(self._mouseX, self._mouseY)
		p0 -= self.getObjectCenterPos() - self._viewTarget
		p1 -= self.getObjectCenterPos() - self._viewTarget
		if self.tool.OnDragStart(p0, p1):
			self._mouseState = 'tool'
		if self._mouseState == 'dragOrClick':
			if e.GetButton() == 1:
				if self._focusObj is not None:
					self._selectObject(self._focusObj, False)
					self.QueueRefresh()

	def OnMouseUp(self, e):
		if e.LeftIsDown() or e.MiddleIsDown() or e.RightIsDown():
			return
		if self._mouseState == 'dragOrClick':
			if e.GetButton() == 1:
				self._selectObject(self._focusObj)
			if e.GetButton() == 3:
					menu = wx.Menu()
					if self._focusObj is not None:

						self.Bind(wx.EVT_MENU, self.OnCenter, menu.Append(-1, _("Center on platform")))
						self.Bind(wx.EVT_MENU, lambda e: self._deleteObject(self._focusObj), menu.Append(-1, _("Delete object")))
						self.Bind(wx.EVT_MENU, self.OnMultiply, menu.Append(-1, _("Multiply object")))
						self.Bind(wx.EVT_MENU, self.OnSplitObject, menu.Append(-1, _("Split object into parts")))

					if ((self._selectedObj != self._focusObj and self._focusObj is not None and self._selectedObj is not None) or len(self._scene.objects()) == 2) and int(profile.getMachineSetting('extruder_amount')) > 1:
						self.Bind(wx.EVT_MENU, self.OnMergeObjects, menu.Append(-1, _("Dual extrusion merge")))
					if len(self._scene.objects()) > 0:
						self.Bind(wx.EVT_MENU, self.OnDeleteAll, menu.Append(-1, _("Delete all objects")))
						self.Bind(wx.EVT_MENU, self.reloadScene, menu.Append(-1, _("Reload all objects")))
						self.Bind(wx.EVT_MENU, self.OnResetPositions, menu.Append(-1, _("Reset all objects positions")))
						self.Bind(wx.EVT_MENU, self.OnResetTransformations, menu.Append(-1, _("Reset all objects transformations")))

					if menu.MenuItemCount > 0:
						self.PopupMenu(menu)
					menu.Destroy()
		elif self._mouseState == 'dragObject' and self._selectedObj is not None:
			self._scene.pushFree(self._selectedObj)
			self.sceneUpdated()
		elif self._mouseState == 'tool':
			if self.tempMatrix is not None and self._selectedObj is not None:
				self._selectedObj.applyMatrix(self.tempMatrix)
				self._scene.pushFree(self._selectedObj)
				self._selectObject(self._selectedObj)
			self.tempMatrix = None
			self.tool.OnDragEnd()
			self.sceneUpdated()
		self._mouseState = None

	def OnMouseMotion(self,e):
		p0, p1 = self.getMouseRay(e.GetX(), e.GetY())
		p0 -= self.getObjectCenterPos() - self._viewTarget
		p1 -= self.getObjectCenterPos() - self._viewTarget

		if e.Dragging() and self._mouseState is not None:
			if self._mouseState == 'tool':
				self.tool.OnDrag(p0, p1)
			elif not e.LeftIsDown() and e.RightIsDown():
				self._mouseState = 'drag'
				if wx.GetKeyState(wx.WXK_SHIFT):
					a = math.cos(math.radians(self._yaw)) / 3.0
					b = math.sin(math.radians(self._yaw)) / 3.0
					self._viewTarget[0] += float(e.GetX() - self._mouseX) * -a
					self._viewTarget[1] += float(e.GetX() - self._mouseX) * b
					self._viewTarget[0] += float(e.GetY() - self._mouseY) * b
					self._viewTarget[1] += float(e.GetY() - self._mouseY) * a
				else:
					self._yaw += e.GetX() - self._mouseX
					self._pitch -= e.GetY() - self._mouseY
				if self._pitch > 170:
					self._pitch = 170
				if self._pitch < 10:
					self._pitch = 10
			elif (e.LeftIsDown() and e.RightIsDown()) or e.MiddleIsDown():
				self._mouseState = 'drag'
				self._zoom += e.GetY() - self._mouseY
				if self._zoom < 1:
					self._zoom = 1
				if self._zoom > numpy.max(self._machineSize) * 3:
					self._zoom = numpy.max(self._machineSize) * 3
			elif e.LeftIsDown() and self._selectedObj is not None and self._selectedObj == self._mouseClickFocus:
				self._mouseState = 'dragObject'
				z = max(0, self._mouseClick3DPos[2])
				p0, p1 = self.getMouseRay(self._mouseX, self._mouseY)
				p2, p3 = self.getMouseRay(e.GetX(), e.GetY())
				p0[2] -= z
				p1[2] -= z
				p2[2] -= z
				p3[2] -= z
				cursorZ0 = p0 - (p1 - p0) * (p0[2] / (p1[2] - p0[2]))
				cursorZ1 = p2 - (p3 - p2) * (p2[2] / (p3[2] - p2[2]))
				diff = cursorZ1 - cursorZ0
				self._selectedObj.setPosition(self._selectedObj.getPosition() + diff[0:2])
		if not e.Dragging() or self._mouseState != 'tool':
			self.tool.OnMouseMove(p0, p1)

		self._mouseX = e.GetX()
		self._mouseY = e.GetY()

	def OnMouseWheel(self, e):
		delta = float(e.GetWheelRotation()) / float(e.GetWheelDelta())
		delta = max(min(delta,4),-4)
		self._zoom *= 1.0 - delta / 10.0
		if self._zoom < 1.0:
			self._zoom = 1.0
		if self._zoom > numpy.max(self._machineSize) * 3:
			self._zoom = numpy.max(self._machineSize) * 3
		self.Refresh()

	def OnMouseLeave(self, e):
		#self._mouseX = -1
		pass

	def getMouseRay(self, x, y):
		if self._viewport is None:
			return numpy.array([0,0,0],numpy.float32), numpy.array([0,0,1],numpy.float32)
		p0 = openglHelpers.unproject(x, self._viewport[1] + self._viewport[3] - y, 0, self._modelMatrix, self._projMatrix, self._viewport)
		p1 = openglHelpers.unproject(x, self._viewport[1] + self._viewport[3] - y, 1, self._modelMatrix, self._projMatrix, self._viewport)
		p0 -= self._viewTarget
		p1 -= self._viewTarget
		return p0, p1

	def _init3DView(self):
		# set viewing projection
		size = self.GetSize()
		glViewport(0, 0, size.GetWidth(), size.GetHeight())
		glLoadIdentity()

		glLightfv(GL_LIGHT0, GL_POSITION, [0.2, 0.2, 1.0, 0.0])

		glDisable(GL_RESCALE_NORMAL)
		glDisable(GL_LIGHTING)
		glDisable(GL_LIGHT0)
		glEnable(GL_DEPTH_TEST)
		glDisable(GL_CULL_FACE)
		glDisable(GL_BLEND)
		glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)

		#scene background color
		glClearColor(0.85, 0.85, 0.85, 1.0)
		glClearStencil(0)
		glClearDepth(1.0)

		glMatrixMode(GL_PROJECTION)
		glLoadIdentity()
		aspect = float(size.GetWidth()) / float(size.GetHeight())
		gluPerspective(45.0, aspect, 1.0, numpy.max(self._machineSize) * 4)

		glMatrixMode(GL_MODELVIEW)
		glLoadIdentity()
		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)

	def OnPaint(self,e):
		connectionGroup = self._printerConnectionManager.getAvailableGroup()
		if len(removableStorage.getPossibleSDcardDrives()) > 0 and (connectionGroup is None or connectionGroup.getPriority() < 0):
			self.printButton._imageID = 2
			self.printButton._tooltip = _("Toolpath to SD")
		elif connectionGroup is not None:
			self.printButton._imageID = connectionGroup.getIconID()
			#self.printButton._tooltip = _("Print with %s") % (connectionGroup.getName())
			self.printButton._tooltip = _("Print/Control")
		else:
			self.printButton._imageID = 3
			self.printButton._tooltip = _("Save toolpath")

		if self._animView is not None:
			self._viewTarget = self._animView.getPosition()
			if self._animView.isDone():
				self._animView = None
		if self._animZoom is not None:
			self._zoom = self._animZoom.getPosition()
			if self._animZoom.isDone():
				self._animZoom = None
		if self._objectShader is None: #TODO: add loading shaders from file(s)
			if openglHelpers.hasShaderSupport():
				self._objectShader = openglHelpers.GLShader("""
					varying float light_amount;

					void main(void)
					{
						gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
						gl_FrontColor = gl_Color;

						light_amount = abs(dot(normalize(gl_NormalMatrix * gl_Normal), normalize(gl_LightSource[0].position.xyz)));
						light_amount += 0.2;
					}
									""","""
					varying float light_amount;

					void main(void)
					{
						gl_FragColor = vec4(gl_Color.xyz * light_amount, gl_Color[3]);
					}
				""")
				self._objectOverhangShader = openglHelpers.GLShader("""
					uniform float cosAngle;
					uniform mat3 rotMatrix;
					varying float light_amount;

					void main(void)
					{
						gl_Position = gl_ModelViewProjectionMatrix * gl_Vertex;
						gl_FrontColor = gl_Color;

						light_amount = abs(dot(normalize(gl_NormalMatrix * gl_Normal), normalize(gl_LightSource[0].position.xyz)));
						light_amount += 0.2;
						if (normalize(rotMatrix * gl_Normal).z < -cosAngle)
						{
							light_amount = -10.0;
						}
					}
				""","""
					varying float light_amount;

					void main(void)
					{
						if (light_amount == -10.0)
						{
							gl_FragColor = vec4(1.0, 0.0, 0.0, gl_Color[3]);
						}else{
							gl_FragColor = vec4(gl_Color.xyz * light_amount, gl_Color[3]);
						}
					}
									""")
				self._objectLoadShader = openglHelpers.GLShader("""
					uniform float intensity;
					uniform float scale;
					varying float light_amount;

					void main(void)
					{
						vec4 tmp = gl_Vertex;
						tmp.x += sin(tmp.z/5.0+intensity*30.0) * scale * intensity;
						tmp.y += sin(tmp.z/3.0+intensity*40.0) * scale * intensity;
						gl_Position = gl_ModelViewProjectionMatrix * tmp;
						gl_FrontColor = gl_Color;

						light_amount = abs(dot(normalize(gl_NormalMatrix * gl_Normal), normalize(gl_LightSource[0].position.xyz)));
						light_amount += 0.2;
					}
			""","""
				uniform float intensity;
				varying float light_amount;

				void main(void)
				{
					gl_FragColor = vec4(gl_Color.xyz * light_amount, 1.0-intensity);
				}
				""")
			if self._objectShader is None or not self._objectShader.isValid(): #Could not make shader.
				self._objectShader = openglHelpers.GLFakeShader()
				self._objectOverhangShader = openglHelpers.GLFakeShader()
				self._objectLoadShader = None
		self._init3DView()
		glTranslate(0,0,-self._zoom)
		glRotate(-self._pitch, 1,0,0)
		glRotate(self._yaw, 0,0,1)
		glTranslate(-self._viewTarget[0],-self._viewTarget[1],-self._viewTarget[2])

		self._viewport = glGetIntegerv(GL_VIEWPORT)
		self._modelMatrix = glGetDoublev(GL_MODELVIEW_MATRIX)
		self._projMatrix = glGetDoublev(GL_PROJECTION_MATRIX)

		glClearColor(1,1,1,1)
		glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT)

		if self.viewMode != 'gcode':
			for n in xrange(0, len(self._scene.objects())):
				obj = self._scene.objects()[n]
				glColor4ub((n >> 16) & 0xFF, (n >> 8) & 0xFF, (n >> 0) & 0xFF, 0xFF)
				self._renderObject(obj)

		if self._mouseX > -1: # mouse has not passed over the opengl window.
			glFlush()
			n = int(glReadPixels(self._mouseX, self.GetSize().GetHeight() - 1 - self._mouseY, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE)[2].encode('hex'), 16)
			if n < len(self._scene.objects()):
				self._focusObj = self._scene.objects()[n]
			else:
				self._focusObj = None
			f = glReadPixels(self._mouseX, self.GetSize().GetHeight() - 1 - self._mouseY, 1, 1, GL_DEPTH_COMPONENT, GL_FLOAT)[0][0]
			#self.GetTopLevelParent().SetTitle(hex(n) + " " + str(f))
			self._mouse3Dpos = openglHelpers.unproject(self._mouseX, self._viewport[1] + self._viewport[3] - self._mouseY, f, self._modelMatrix, self._projMatrix, self._viewport)
			self._mouse3Dpos -= self._viewTarget

		self._init3DView()
		glTranslate(0,0,-self._zoom)
		glRotate(-self._pitch, 1,0,0)
		glRotate(self._yaw, 0,0,1)
		glTranslate(-self._viewTarget[0],-self._viewTarget[1],-self._viewTarget[2])

		self._objectShader.unbind()
		self._engineResultView.OnDraw()
		if self.viewMode != 'gcode':
			glStencilFunc(GL_ALWAYS, 1, 1)
			glStencilOp(GL_INCR, GL_INCR, GL_INCR)

			if self.viewMode == 'overhang':
				self._objectOverhangShader.bind()
				support_angle = profile.getProfileSettingFloat('support_angle')
				if self._isSimpleMode:
					support_angle = float(profile.settingsDictionary['support_angle'].getDefault())
				self._objectOverhangShader.setUniform('cosAngle', math.cos(math.radians(90 - support_angle)))
			else:
				self._objectShader.bind()
			for obj in self._scene.objects():
				if obj._loadAnim is not None:
					if obj._loadAnim.isDone():
						obj._loadAnim = None
					else:
						continue
				brightness = 1.0
				if self._focusObj == obj:
					brightness = 1.2
				elif self._focusObj is not None or self._selectedObj is not None and obj != self._selectedObj:
					brightness = 0.8

				if self._selectedObj == obj or self._selectedObj is None:
					#If we want transparent, then first render a solid black model to remove the printer size lines.
					if self.viewMode == 'transparent':
						glColor4f(0, 0, 0, 0)
						self._renderObject(obj)
						glEnable(GL_BLEND)
						glBlendFunc(GL_ONE, GL_ONE)
						glDisable(GL_DEPTH_TEST)
						brightness *= 0.5
					if self.viewMode == 'xray':
						glColorMask(GL_FALSE, GL_FALSE, GL_FALSE, GL_FALSE)
					glStencilOp(GL_INCR, GL_INCR, GL_INCR)
					glEnable(GL_STENCIL_TEST)

				if self.viewMode == 'overhang':
					if self._selectedObj == obj and self.tempMatrix is not None:
						self._objectOverhangShader.setUniform('rotMatrix', obj.getMatrix() * self.tempMatrix)
					else:
						self._objectOverhangShader.setUniform('rotMatrix', obj.getMatrix())

				if not self._scene.checkPlatform(obj):
					glColor4f(0.5 * brightness, 0.5 * brightness, 0.5 * brightness, 0.8 * brightness)
					self._renderObject(obj)
				else:
					self._renderObject(obj, brightness)
				glDisable(GL_STENCIL_TEST)
				glDisable(GL_BLEND)
				glEnable(GL_DEPTH_TEST)
				glColorMask(GL_TRUE, GL_TRUE, GL_TRUE, GL_TRUE)

			if self.viewMode == 'xray':
				glPushMatrix()
				glLoadIdentity()
				glEnable(GL_STENCIL_TEST)
				glStencilOp(GL_KEEP, GL_KEEP, GL_KEEP) #Keep values
				glDisable(GL_DEPTH_TEST)
				for i in xrange(2, 15, 2): #All even values
					glStencilFunc(GL_EQUAL, i, 0xFF)
					glColor(float(i)/10, float(i)/10, float(i)/5)
					glBegin(GL_QUADS)
					glVertex3f(-1000,-1000,-10)
					glVertex3f( 1000,-1000,-10)
					glVertex3f( 1000, 1000,-10)
					glVertex3f(-1000, 1000,-10)
					glEnd()
				for i in xrange(1, 15, 2): #All odd values
					glStencilFunc(GL_EQUAL, i, 0xFF)
					glColor(float(i)/10, 0, 0)
					glBegin(GL_QUADS)
					glVertex3f(-1000,-1000,-10)
					glVertex3f( 1000,-1000,-10)
					glVertex3f( 1000, 1000,-10)
					glVertex3f(-1000, 1000,-10)
					glEnd()
				glPopMatrix()
				glDisable(GL_STENCIL_TEST)
				glEnable(GL_DEPTH_TEST)

			self._objectShader.unbind()

			glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
			glEnable(GL_BLEND)
			if self._objectLoadShader is not None:
				self._objectLoadShader.bind()
				#Model color during load animation
				glColor4ub(177, 205, 54, 255)
				for obj in self._scene.objects():
					if obj._loadAnim is None:
						continue
					self._objectLoadShader.setUniform('intensity', obj._loadAnim.getPosition())
					self._objectLoadShader.setUniform('scale', obj.getBoundaryCircle() / 10)
					self._renderObject(obj)
				self._objectLoadShader.unbind()
				glDisable(GL_BLEND)

		self._drawMachine()

		if self.viewMode != 'gcode':
			#Draw the object box-shadow, so you can see where it will collide with other objects.
			if self._selectedObj is not None:
				glEnable(GL_BLEND)
				glEnable(GL_CULL_FACE)
				glColor4f(0,0,0,0.16)
				glDepthMask(False)
				for obj in self._scene.objects():
					glPushMatrix()
					glTranslatef(obj.getPosition()[0], obj.getPosition()[1], 0)
					glBegin(GL_TRIANGLE_FAN)
					for p in obj._boundaryHull[::-1]:
						glVertex3f(p[0], p[1], 0)
					glEnd()
					glPopMatrix()
				if self._scene.isOneAtATime(): #Check print sequence mode.
					glPushMatrix()
					glColor4f(0,0,0,0.06)
					glTranslatef(self._selectedObj.getPosition()[0], self._selectedObj.getPosition()[1], 0)
					glBegin(GL_TRIANGLE_FAN)
					for p in self._selectedObj._printAreaHull[::-1]:
						glVertex3f(p[0], p[1], 0)
					glEnd()
					glBegin(GL_TRIANGLE_FAN)
					for p in self._selectedObj._headAreaMinHull[::-1]:
						glVertex3f(p[0], p[1], 0)
					glEnd()
					glPopMatrix()
				glDepthMask(True)
				glDisable(GL_CULL_FACE)

			#Draw the outline of the selected object on top of everything else except the GUI.
			if self._selectedObj is not None and self._selectedObj._loadAnim is None:
				glDisable(GL_DEPTH_TEST)
				glEnable(GL_CULL_FACE)
				glEnable(GL_STENCIL_TEST)
				glDisable(GL_BLEND)
				glStencilFunc(GL_EQUAL, 0, 255)

				glPolygonMode(GL_FRONT_AND_BACK, GL_LINE)
				glLineWidth(2)
				glColor4f(1,1,1,0.5)
				self._renderObject(self._selectedObj)
				glPolygonMode(GL_FRONT_AND_BACK, GL_FILL)

				glViewport(0, 0, self.GetSize().GetWidth(), self.GetSize().GetHeight())
				glDisable(GL_STENCIL_TEST)
				glDisable(GL_CULL_FACE)
				glEnable(GL_DEPTH_TEST)

			if self._selectedObj is not None:
				glPushMatrix()
				pos = self.getObjectCenterPos()
				glTranslate(pos[0], pos[1], pos[2])
				self.tool.OnDraw()
				glPopMatrix()
		if self.viewMode == 'overhang' and not openglHelpers.hasShaderSupport():
			glDisable(GL_DEPTH_TEST)
			glPushMatrix()
			glLoadIdentity()
			glTranslate(0,-4,-10)
			glColor4ub(60,60,60,255)
			openglHelpers.glDrawStringCenter(_("Overhang view not working due to lack of OpenGL shaders support."))
			glPopMatrix()

	def _renderObject(self, obj, brightness = 0, addSink = True):
		glPushMatrix()
		if addSink:
			glTranslate(obj.getPosition()[0], obj.getPosition()[1], obj.getSize()[2] / 2 - self.getObjectSink())
		else:
			glTranslate(obj.getPosition()[0], obj.getPosition()[1], obj.getSize()[2] / 2)

		if self.tempMatrix is not None and obj == self._selectedObj:
			glMultMatrixf(openglHelpers.convert3x3MatrixTo4x4(self.tempMatrix))

		offset = obj.getDrawOffset()
		glTranslate(-offset[0], -offset[1], -offset[2] - obj.getSize()[2] / 2)

		glMultMatrixf(openglHelpers.convert3x3MatrixTo4x4(obj.getMatrix()))

		n = 0
		for m in obj._meshList:
			if m.vbo is None:
				m.vbo = openglHelpers.GLVBO(GL_TRIANGLES, m.vertexes, m.normal)
			if brightness != 0:
				glColor4fv(map(lambda idx: idx * brightness, self._objColors[n]))
				n += 1
			m.vbo.render()
		glPopMatrix()

	def _drawMachine(self):
		glEnable(GL_CULL_FACE)
		glEnable(GL_BLEND)

		size = [profile.getMachineSettingFloat('machine_width'), profile.getMachineSettingFloat('machine_depth'), profile.getMachineSettingFloat('machine_height')]

		#Due to NC licensing of the stl files, temporarily removing platform mesh loading for Ultimaker and Witbox
		'''machine_type = profile.getMachineSetting('machine_type')
		if machine_type not in self._platformMesh:
			self._platformMesh[machine_type] = None

			filename = None
			texture_name = None
			offset = [0,0,0]
			texture_offset = [0,0,0]
			texture_scale = 1.0
			if machine_type == 'ultimaker2' or machine_type == 'ultimaker2extended':
				filename = resources.getPathForMesh('ultimaker2_platform.stl')
				offset = [-9,-37,145]
				texture_name = 'Ultimaker2backplate.png'
				texture_offset = [9,150,-5]
			elif machine_type == 'ultimaker2go':
				filename = resources.getPathForMesh('ultimaker2go_platform.stl')
				offset = [0,-42,145]
				texture_offset = [0,105,-5]
				texture_name = 'Ultimaker2backplate.png'
				texture_scale = 0.9
			elif machine_type == 'ultimaker_plus':
				filename = resources.getPathForMesh('ultimaker2_platform.stl')
				offset = [0,-37,145]
				texture_offset = [0,150,-5]
				texture_name = 'UltimakerPlusbackplate.png'
			elif machine_type == 'ultimaker':
				filename = resources.getPathForMesh('ultimaker_platform.stl')
				offset = [0,0,2.5]
			elif machine_type == 'Witbox':
				filename = resources.getPathForMesh('Witbox_platform.stl')
				offset = [0,-37,145]

			if filename is not None:
				meshes = meshLoader.loadMeshes(filename)
				if len(meshes) > 0:
					self._platformMesh[machine_type] = meshes[0]
					self._platformMesh[machine_type]._drawOffset = numpy.array(offset, numpy.float32)
					self._platformMesh[machine_type].texture = None
					if texture_name is not None:
						self._platformMesh[machine_type].texture = openglHelpers.loadGLTexture(texture_name)
						self._platformMesh[machine_type].texture_offset = texture_offset
						self._platformMesh[machine_type].texture_scale = texture_scale
		if self._platformMesh[machine_type] is not None:
			mesh = self._platformMesh[machine_type]
			glColor4f(1,1,1,0.5)
			self._objectShader.bind()
			self._renderObject(mesh, False, False)
			self._objectShader.unbind()

			#For the Ultimaker 2 render the texture on the back plate to show the Ultimaker2 text.
			if mesh.texture is not None:
				glBindTexture(GL_TEXTURE_2D, mesh.texture)
				glEnable(GL_TEXTURE_2D)
				glPushMatrix()
				glColor4f(1,1,1,1)

				glTranslate(mesh.texture_offset[0], mesh.texture_offset[1], mesh.texture_offset[2])
				glScalef(mesh.texture_scale, mesh.texture_scale, mesh.texture_scale)
				h = 50
				d = 8
				w = 100
				glEnable(GL_BLEND)
				glBlendFunc(GL_DST_COLOR, GL_ONE_MINUS_SRC_ALPHA)
				glEnable(GL_ALPHA_TEST)
				glAlphaFunc(GL_GREATER, 0.0)
				glBegin(GL_QUADS)
				glTexCoord2f(1, 0)
				glVertex3f( w, 0, h)
				glTexCoord2f(0, 0)
				glVertex3f(-w, 0, h)
				glTexCoord2f(0, 1)
				glVertex3f(-w, 0, 0)
				glTexCoord2f(1, 1)
				glVertex3f( w, 0, 0)

				glTexCoord2f(1, 0)
				glVertex3f(-w, d, h)
				glTexCoord2f(0, 0)
				glVertex3f( w, d, h)
				glTexCoord2f(0, 1)
				glVertex3f( w, d, 0)
				glTexCoord2f(1, 1)
				glVertex3f(-w, d, 0)
				glEnd()
				glDisable(GL_TEXTURE_2D)
				glDisable(GL_ALPHA_TEST)
				glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
				glPopMatrix()
		else:'''
		# until glEnd() goes inside the else
		glColor4f(0,0,0,1)
		glLineWidth(3)
		glBegin(GL_LINES)
		glVertex3f(-size[0] / 2, -size[1] / 2, 0)
		glVertex3f(-size[0] / 2, -size[1] / 2, 10)
		glVertex3f(-size[0] / 2, -size[1] / 2, 0)
		glVertex3f(-size[0] / 2+10, -size[1] / 2, 0)
		glVertex3f(-size[0] / 2, -size[1] / 2, 0)
		glVertex3f(-size[0] / 2, -size[1] / 2+10, 0)
		glEnd()

		glDepthMask(False)

		polys = profile.getMachineSizePolygons()
		height = profile.getMachineSettingFloat('machine_height')
		circular = profile.getMachineSetting('machine_shape') == 'Circular'
		glBegin(GL_QUADS)
		# Draw the sides of the build volume.
		for n in xrange(0, len(polys[0])):
			if not circular:
				if n % 2 == 0:
					glColor4ub(210, 235, 103, 100)
				else:
					glColor4ub(223, 241, 145, 100)
			else:
				glColor4ub(223, 241, 145, 100)

			glVertex3f(polys[0][n][0], polys[0][n][1], height)
			glVertex3f(polys[0][n][0], polys[0][n][1], 0)
			glVertex3f(polys[0][n-1][0], polys[0][n-1][1], 0)
			glVertex3f(polys[0][n-1][0], polys[0][n-1][1], height)
		glEnd()

		#Draw top of build volume.
		glColor4ub(183, 209, 90, 100)
		glBegin(GL_TRIANGLE_FAN)
		for p in polys[0][::-1]:
			glVertex3f(p[0], p[1], height)
		glEnd()

		#Draw checkerboard
		if self._platformTexture is None:
			self._platformTexture = openglHelpers.loadGLTexture('checkerboard.png')
			glBindTexture(GL_TEXTURE_2D, self._platformTexture)
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)
			glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST)
		#Dark checkerboard color
		glColor4f(1,1,1,0.7)
		glBindTexture(GL_TEXTURE_2D, self._platformTexture)
		glEnable(GL_TEXTURE_2D)
		glBegin(GL_TRIANGLE_FAN)
		for p in polys[0]:
			glTexCoord2f(p[0]/20, p[1]/20)
			glVertex3f(p[0], p[1], 0)
		glEnd()

		#Draw no-go zones. (clips in case of UM2)
		glDisable(GL_TEXTURE_2D)
		glColor4ub(127, 127, 127, 200)
		for poly in polys[1:]:
			glBegin(GL_TRIANGLE_FAN)
			for p in poly:
				glTexCoord2f(p[0]/20, p[1]/20)
				glVertex3f(p[0], p[1], 0)
			glEnd()

		glDepthMask(True)
		glDisable(GL_BLEND)
		glDisable(GL_CULL_FACE)

	def getObjectCenterPos(self):
		if self._selectedObj is None:
			return [0.0, 0.0, 0.0]
		pos = self._selectedObj.getPosition()
		size = self._selectedObj.getSize()
		return [pos[0], pos[1], size[2]/2 - self.getObjectSink()]

	def getObjectBoundaryCircle(self):
		if self._selectedObj is None:
			return 0.0
		return self._selectedObj.getBoundaryCircle()

	def getObjectSize(self):
		if self._selectedObj is None:
			return [0.0, 0.0, 0.0]
		return self._selectedObj.getSize()

	def getObjectMatrix(self):
		if self._selectedObj is None:
			return numpy.matrix(numpy.identity(3))
		return self._selectedObj.getMatrix()

#TODO: Remove this or put it in a seperate file
class shaderEditor(wx.Frame):
	def __init__(self, parent, callback, v, f):
		super(shaderEditor, self).__init__(parent, title=_("Shader editor"), style=wx.DEFAULT_DIALOG_STYLE|wx.RESIZE_BORDER)
		self._callback = callback
		s = wx.BoxSizer(wx.VERTICAL)
		self.SetSizer(s)
		self._vertex = wx.TextCtrl(self, -1, v, style=wx.TE_MULTILINE)
		self._fragment = wx.TextCtrl(self, -1, f, style=wx.TE_MULTILINE)
		s.Add(self._vertex, 1, flag=wx.EXPAND)
		s.Add(self._fragment, 1, flag=wx.EXPAND)

		self._vertex.Bind(wx.EVT_TEXT, self.OnText, self._vertex)
		self._fragment.Bind(wx.EVT_TEXT, self.OnText, self._fragment)

		self.SetPosition(self.GetParent().GetPosition())
		self.SetSize((self.GetSize().GetWidth(), self.GetParent().GetSize().GetHeight()))
		self.Show()

	def OnText(self, e):
		self._callback(self._vertex.GetValue(), self._fragment.GetValue())