Reinstate optical simulation

wfsim/strax_interface.py

@@ -539,6 +539,24 @@ class RawRecordsFromFax1T(RawRecordsFromFaxNT):
     provides = ('raw_records', 'truth')
 
 
+@export
+class RawRecordsFromFaxOpticalNT(RawRecordsFromFaxNT):
+
+    def _setup(self):
+        self.sim = ChunkRawRecords(self.config,
+                                   rawdata_generator=wfsim.RawDataOptical,
+                                   channels=self.channels,
+                                   timings=self.timings,)
+        self.sim.truth_buffer = np.zeros(10000, dtype=instruction_dtype + optical_extra_dtype
+                                                + truth_extra_dtype + [('fill', bool)])
+        self.sim_iter = self.sim(self.instructions)
+
+
+    def get_instructions(self):
+        assert self.config['fax_file'].endswith('.root'), 'You need to supply a root file for optical simulation!'
+        self.instructions, self.channels, self.timings = read_optical(self.config)
+
+
 @export
 @strax.takes_config(
     strax.Option('epix_config', track=False, default={},