diff --git a/rotation.cpp b/rotation.cpp
index 4fb3bea..f99caf4 100644
--- a/rotation.cpp
+++ b/rotation.cpp
@@ -649,10 +649,6 @@ Image* rotate(Image const& src, double angle)
   // TODO: add one ligne for smooth border
   DPoint const tl_grid = get_mapped_point(src, Point(0, 0), rotation);
   Point const tl = convert_img_coord(*rotated, tl_grid);
-  DPoint const tr_grid = get_mapped_point(src, Point(src.width - 1, 0), rotation);
-  Point const tr = convert_img_coord(*rotated, tr_grid);
-  DPoint const bl_grid = get_mapped_point(src, Point(0, src.height - 1), rotation);
-  Point const bl = convert_img_coord(*rotated, bl_grid);
 
   // corner points in source image
   DPoint src_tl = get_mapped_point(*rotated, tl, -rotation);
@@ -671,17 +667,6 @@ Image* rotate(Image const& src, double angle)
   round_if_very_small(src_delta_y.x);
   round_if_very_small(src_delta_y.y);
 
-  // // steps for first column in source image (y)
-  int origin_nb_steps = max(abs(bl.x - tl.x), abs(bl.y - tl.y));
-  // // steps for line in source image (x)
-  int line_nb_steps = max(abs(tr.x - tl.x), abs(tr.y - tl.y));
-
-  // steps for first column in rotated image (y)
-  DPoint const rotated_step((bl.x - tl.x) / (float) origin_nb_steps, (bl.y - tl.y) / (float) origin_nb_steps);
-
-  // steps for line in rotated image (x)
-  DPoint const bresenham((tr.x - tl.x) / (float) line_nb_steps, (tr.y - tl.y) / (float) line_nb_steps);
-
   unsigned int const src_limit = src.width * src.height * 3;
 
   DPoint const rot_origin_in_src_grid = get_mapped_point(*rotated, Point(0, 0), -rotation);