def onToggleRt(self, enabled):
"""
Real time agent has been enabled. the first time we need to create the
TerrainSync object for the region and get a few pointers.
"""
if not self.terrain:
self._props = self._parent.exportSettings
self.terrain = TerrainSync(self._parent, self._props.terrainLOD)
self.workpool = self._parent.workpool
if enabled:
self.simrt = self._parent.simrt
else:
self.simrt = None
