- rna attribute setting problem, class instances could not set their own attributes because they are blocked by our own internal setattr.

this could be supported again easily however it leads typo's & api changes not showing any errors.

  This broke povray export.
  Solution for now is to allow setting private properties starting with '_'

  eg, 
    ob = bpy.context.object
    
    ob._foo = [1,2,3] # this is a python list, it will stay only as long as this PyObject is active
    ob.foo = 1 # raises an error!, only for rna properties
    ob["foo"] = 1 # converts to an ID property and is saved

    using the underscore like this should really be used for classes internally.

- povray failed on armatures

- menu key wasn't using WM_keymap_add_menu

release/scripts/io/engine_render_pov.py

@@ -285,7 +285,7 @@ def write_pov(filename, scene=None, info_callback = None):
 		for ob in sel:
 			ob_num+= 1
 			
-			if ob.type in ('LAMP', 'CAMERA', 'EMPTY', 'META'):
+			if ob.type in ('LAMP', 'CAMERA', 'EMPTY', 'META', 'ARMATURE'):
 				continue
 			
 			me = ob.data
@@ -722,26 +722,26 @@ class PovrayRender(bpy.types.RenderEngine):
 	def _export(self, scene):
 		import tempfile
 		
-		self.temp_file_in = tempfile.mktemp(suffix='.pov')
-		self.temp_file_out = tempfile.mktemp(suffix='.tga')
-		self.temp_file_ini = tempfile.mktemp(suffix='.ini')
+		self._temp_file_in = tempfile.mktemp(suffix='.pov')
+		self._temp_file_out = tempfile.mktemp(suffix='.tga')
+		self._temp_file_ini = tempfile.mktemp(suffix='.ini')
 		'''
-		self.temp_file_in = '/test.pov'
-		self.temp_file_out = '/test.tga'
-		self.temp_file_ini = '/test.ini'
+		self._temp_file_in = '/test.pov'
+		self._temp_file_out = '/test.tga'
+		self._temp_file_ini = '/test.ini'
 		'''
 		
 		def info_callback(txt):
 			self.update_stats("", "POVRAY: " + txt)
 			
-		write_pov(self.temp_file_in, scene, info_callback)
+		write_pov(self._temp_file_in, scene, info_callback)
 		
 	def _render(self):
 		
-		try:		os.remove(self.temp_file_out) # so as not to load the old file
+		try:		os.remove(self._temp_file_out) # so as not to load the old file
 		except:	pass
 		
-		write_pov_ini(self.temp_file_ini, self.temp_file_in, self.temp_file_out)
+		write_pov_ini(self._temp_file_ini, self._temp_file_in, self._temp_file_out)
 		
 		print ("***-STARTING-***")
 		
@@ -757,15 +757,15 @@ class PovrayRender(bpy.types.RenderEngine):
 				pov_binary = winreg.QueryValueEx(regKey, 'Home')[0] + '\\bin\\pvengine'
 			
 		if 1:
-			self.process = subprocess.Popen([pov_binary, self.temp_file_ini]) # stdout=subprocess.PIPE, stderr=subprocess.PIPE
+			self._process = subprocess.Popen([pov_binary, self._temp_file_ini]) # stdout=subprocess.PIPE, stderr=subprocess.PIPE
 		else:
 			# This works too but means we have to wait until its done
-			os.system('%s %s' % (pov_binary, self.temp_file_ini))
+			os.system('%s %s' % (pov_binary, self._temp_file_ini))
 		
 		print ("***-DONE-***")
 	
 	def _cleanup(self):
-		for f in (self.temp_file_in, self.temp_file_ini, self.temp_file_out):
+		for f in (self._temp_file_in, self._temp_file_ini, self._temp_file_out):
 			try:		os.remove(f)
 			except:	pass
 		
@@ -785,19 +785,19 @@ class PovrayRender(bpy.types.RenderEngine):
 		y= int(r.resolution_y*r.resolution_percentage*0.01)
 
 		# Wait for the file to be created
-		while not os.path.exists(self.temp_file_out):
+		while not os.path.exists(self._temp_file_out):
 			if self.test_break():
-				try:		self.process.terminate()
+				try:		self._process.terminate()
 				except:	pass
 				break
 			
-			if self.process.poll() != None:
+			if self._process.poll() != None:
 				self.update_stats("", "POVRAY: Failed")
 				break
 			
 			time.sleep(self.DELAY)
 		
-		if os.path.exists(self.temp_file_out):
+		if os.path.exists(self._temp_file_out):
 			
 			self.update_stats("", "POVRAY: Rendering")
 			
@@ -807,7 +807,7 @@ class PovrayRender(bpy.types.RenderEngine):
 				result = self.begin_result(0, 0, x, y)
 				lay = result.layers[0]
 				# possible the image wont load early on.
-				try:		lay.load_from_file(self.temp_file_out)
+				try:		lay.load_from_file(self._temp_file_out)
 				except:	pass
 				self.end_result(result)
 			
@@ -815,23 +815,23 @@ class PovrayRender(bpy.types.RenderEngine):
 			while True:
 				
 				# test if povray exists
-				if self.process.poll() != None:
+				if self._process.poll() != None:
 					update_image();
 					break
 				
 				# user exit
 				if self.test_break():
-					try:		self.process.terminate()
+					try:		self._process.terminate()
 					except:	pass
 					
 					break
 				
 				# Would be nice to redirect the output
-				# stdout_value, stderr_value = self.process.communicate() # locks
+				# stdout_value, stderr_value = self._process.communicate() # locks
 				
 				
 				# check if the file updated
-				new_size = os.path.getsize(self.temp_file_out)
+				new_size = os.path.getsize(self._temp_file_out)
 				
 				if new_size != prev_size:
 					update_image()