initialize particles directly from standalone ucf file

particle.py

@@ -61,6 +61,12 @@ class Particles:
         for key in col:
             col[key]-=1
         return cls.from_array(pp,col,time,period,select_col=select_col)
+    
+    @classmethod
+    def from_ucf(cls,file,period,select_col=None):
+        from .ucf import read_particles
+        (pp,col,time) = read_particles(file,step=1,verbosity=False,debug=False)
+        return cls.from_array(pp,col,time,period,select_col=select_col)
 
     @classmethod
     def from_position(cls,x,y,z,time,period):

ucf.py

@@ -864,9 +864,9 @@ def colmap_from_flags(irank,ihybrid,idem,iscal):
       col['tyc'] = ioffset; ioffset+=1
       col['tzc'] = ioffset; ioffset+=1
     if iscal>0:
-      for ii in range(0,iscal):
-        col['s'+str(ii)] = ioffset; ioffset+=1
-        col['q'+str(ii)] = ioffset; ioffset+=1
+      for ii in range(iscal):
+        col['s'+str(ii+1)] = ioffset; ioffset+=1
+        col['q'+str(ii+1)] = ioffset; ioffset+=1
     return col
 
 def grid_chunk(chunk,gridg):