Added new autoplate function

Crudely arranges the added STLs on the bed. Does not attempt to optimise for
space or anything, just arranges them in a rough grid.

plater.py

@@ -18,13 +18,15 @@ class showstl(wx.Window):
 		wx.Window.__init__(self,parent,size=size,pos=pos)
 		self.l=wx.ListCtrl(self,style=wx.LC_LIST,size=(300,130),pos=(0,size[1]-130))
 		self.eb=wx.Button(self,label="Export",pos=(300,size[1]-130))
-        self.sb=wx.Button(self,label="Snap to Z=0",pos=(300,size[1]-100))
-        self.cb=wx.Button(self,label="Put at 100,100",pos=(300,size[1]-70))
-        self.db=wx.Button(self,label="Delete",pos=(300,size[1]-40))
+		self.sb=wx.Button(self,label="Snap to Z=0",pos=(300,size[1]-105))
+		self.cb=wx.Button(self,label="Put at 100,100",pos=(300,size[1]-80))
+		self.db=wx.Button(self,label="Delete",pos=(300,size[1]-55))
+		self.ab=wx.Button(self,label="Auto",pos=(300,size[1]-30))
 		self.eb.Bind(wx.EVT_BUTTON,self.export)
 		self.sb.Bind(wx.EVT_BUTTON,self.snap)
 		self.cb.Bind(wx.EVT_BUTTON,self.center)
 		self.db.Bind(wx.EVT_BUTTON,self.delete)
+		self.ab.Bind(wx.EVT_BUTTON,self.autoplate)
 		#self.SetBackgroundColour((0,0,0))
 		#wx.FutureCall(200,self.paint)
 		self.i=0
@@ -79,6 +81,36 @@ class showstl(wx.Window):
 			stltool.emitstl(name,facets,"plater_export")
 			print "wrote ",name
 			
+	def autoplate(self,event):
+		print "Autoplating"
+		separation = 2
+		bedsize = [200,200,100]
+		cursor = [0,0,0]
+		newrow = 0
+		for i in self.models:
+			x = abs(self.models[i].dims[0] - self.models[i].dims[1])
+			y = abs(self.models[i].dims[2] - self.models[i].dims[3])
+			centre = [x/2, y/2]
+			centreoffset = [self.models[i].dims[0] + centre[0], self.models[i].dims[2] + centre[1]]
+			if (newrow == 0) or (newrow < y):
+				newrow = y
+			#To the person who works out why the offsets are applied differently here:
+			# Good job, it confused the hell out of me.
+			self.models[i].offsets[0] = cursor[0] + centre[0] - centreoffset[0]
+			self.models[i].offsets[1] = cursor[1] + centre[1] + centreoffset[1]
+			cursor[0] += x+separation
+			if cursor[0] >= bedsize[0]:
+				cursor[0] = 0
+				cursor[1] += newrow+separation
+				newrow = 0
+				self.models[i].offsets[0] = cursor[0] + centre[0] - centreoffset[0]
+				self.models[i].offsets[1] = cursor[1] + centre[1] + centreoffset[1]
+				cursor[0] += x+separation
+			if (cursor[1]+y) >= bedsize[1]:
+				print "Bed full, sorry sir :("
+				self.Refresh()
+				return
+		self.Refresh()
 		
 	def right(self,event):
 		dlg=wx.FileDialog(self,"Open file to print",self.basedir,style=wx.FD_OPEN|wx.FD_FILE_MUST_EXIST)