Merge add4825 into 8f6003b

LSSTDESC · Nov 26, 2018 · 13bac1d · 13bac1d
2 parents 8f6003b + add4825
commit 13bac1d
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Showing 2 changed files with 7 additions and 1 deletion.
diff --git a/data/default_imsim_configs b/data/default_imsim_configs
@@ -16,6 +16,10 @@ max_flux_simple = 100
 # forced, no matter what the object flux is.
 sensor_limit = 200
 
+# If the peak pixel value is > fft_sb_thresh, then transition to fft rendering.
+# This value should be at least as large as full_well.  2xfull_well is conservative.
+fft_sb_thresh = 2e5
+
 [persistence]
 eimage_prefix = lsst_e_
 eimage_compress = True

diff --git a/python/desc/imsim/ImageSimulator.py b/python/desc/imsim/ImageSimulator.py
@@ -368,6 +368,7 @@ def __call__(self, gs_objects):
         # outer scope and set to an ImageSimulator instance.
         max_flux_simple = IMAGE_SIMULATOR.config['ccd']['max_flux_simple']
         sensor_limit = IMAGE_SIMULATOR.config['ccd']['sensor_limit']
+        fft_sb_thresh = IMAGE_SIMULATOR.config['ccd'].get('fft_sb_thresh',None)
         gs_interpreter = IMAGE_SIMULATOR.gs_interpreters[self.sensor_name]
         with warnings.catch_warnings():
             warnings.filterwarnings('ignore', 'Automatic n_photons',
@@ -387,7 +388,8 @@ def __call__(self, gs_objects):
                                  gs_obj.galSimType)
                     gs_interpreter.drawObject(gs_obj,
                                               max_flux_simple=max_flux_simple,
-                                              sensor_limit=sensor_limit)
+                                              sensor_limit=sensor_limit,
+                                              fft_sb_thresh=fft_sb_thresh)
                     # Ensure the object's id is added to the drawn
                     # object set.
                     gs_interpreter.drawn_objects.add(gs_obj.uniqueId)