Fix Weave() for horizontally mirrored display (NeoPixel 0 at top-right)

matrixclock/Display.py

@@ -167,10 +167,13 @@ class Display(object):
         return(int(Number/self.Columns))
     
     def Weave(self,Pos):
+        """Convert logical position to physical LED position for horizontally mirrored display.
+        NeoPixel 0 is at top-right, serpentine wiring pattern."""
         Row=self.Num2Row(Pos)
-        if Row%2 == 1:
-            NewPos=(Row+1)*self.Columns-self.Num2Column(Pos)-1
-        else:
+        Col=self.Num2Column(Pos)
+        if Row%2 == 0:  # Even rows go right-to-left (mirrored from original)
+            NewPos=Row*self.Columns+(self.Columns-1-Col)
+        else:  # Odd rows go left-to-right
             NewPos=Pos
         return NewPos