added more comments

modules/bidirectional_idt.scad

@@ -24,7 +24,9 @@ module bi_directional_idt(
     // id number prams
     id_number = 0,
     has_id = false,
-    id_flip_dir = [1, 1, 1],
+    id_scale = [1, 1, 1],
+    id_translate = [0, 0, 0],
+    id_rot = [0, 0, 0],
     // extra
     post_scale = 1,
     echo_stats = false,
@@ -46,7 +48,9 @@ module bi_directional_idt(
     if (has_id) {
         color([255/255, 0/255, 255/255])
         translate([finger_length*lambda/2, has_bond_pads ? -(bond_pad_leg_length * post_scale * cos(bond_pad_angle)) : -lambda*finger_length/2, 0])
-        scale(id_flip_dir)
+        translate(id_translate)
+        rotate(id_rot) 
+        scale(id_scale)
         text(str(id_number), size=id_text_size, halign="center");
     }