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diff --git a/Marlin/src/feature/bedlevel/mbl/mesh_bed_leveling.cpp b/Marlin/src/feature/bedlevel/mbl/mesh_bed_leveling.cpp
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+++ b/Marlin/src/feature/bedlevel/mbl/mesh_bed_leveling.cpp
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+/**
+ * Marlin 3D Printer Firmware
+ * Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
+ *
+ * Based on Sprinter and grbl.
+ * Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ */
+
+#include "../../../inc/MarlinConfig.h"
+
+#if ENABLED(MESH_BED_LEVELING)
+
+  #include "../bedlevel.h"
+
+  #include "../../../module/motion.h"
+
+  #if ENABLED(EXTENSIBLE_UI)
+    #include "../../../lcd/extui/ui_api.h"
+  #endif
+
+  mesh_bed_leveling mbl;
+
+  float mesh_bed_leveling::z_offset,
+        mesh_bed_leveling::z_values[GRID_MAX_POINTS_X][GRID_MAX_POINTS_Y],
+        mesh_bed_leveling::index_to_xpos[GRID_MAX_POINTS_X],
+        mesh_bed_leveling::index_to_ypos[GRID_MAX_POINTS_Y];
+
+  mesh_bed_leveling::mesh_bed_leveling() {
+    LOOP_L_N(i, GRID_MAX_POINTS_X)
+      index_to_xpos[i] = MESH_MIN_X + i * (MESH_X_DIST);
+    LOOP_L_N(i, GRID_MAX_POINTS_Y)
+      index_to_ypos[i] = MESH_MIN_Y + i * (MESH_Y_DIST);
+    reset();
+  }
+
+  void mesh_bed_leveling::reset() {
+    z_offset = 0;
+    ZERO(z_values);
+    #if ENABLED(EXTENSIBLE_UI)
+      GRID_LOOP(x, y) ExtUI::onMeshUpdate(x, y, 0);
+    #endif
+  }
+
+  #if IS_CARTESIAN && DISABLED(SEGMENT_LEVELED_MOVES)
+
+    /**
+     * Prepare a mesh-leveled linear move in a Cartesian setup,
+     * splitting the move where it crosses mesh borders.
+     */
+    void mesh_bed_leveling::line_to_destination(const feedRate_t &scaled_fr_mm_s, uint8_t x_splits, uint8_t y_splits) {
+      // Get current and destination cells for this line
+      xy_int8_t scel = cell_indexes(current_position), ecel = cell_indexes(destination);
+      NOMORE(scel.x, GRID_MAX_POINTS_X - 2);
+      NOMORE(scel.y, GRID_MAX_POINTS_Y - 2);
+      NOMORE(ecel.x, GRID_MAX_POINTS_X - 2);
+      NOMORE(ecel.y, GRID_MAX_POINTS_Y - 2);
+
+      // Start and end in the same cell? No split needed.
+      if (scel == ecel) {
+        current_position = destination;
+        line_to_current_position(scaled_fr_mm_s);
+        return;
+      }
+
+      #define MBL_SEGMENT_END(A) (current_position.A + (destination.A - current_position.A) * normalized_dist)
+
+      float normalized_dist;
+      xyze_pos_t dest;
+      const int8_t gcx = _MAX(scel.x, ecel.x), gcy = _MAX(scel.y, ecel.y);
+
+      // Crosses on the X and not already split on this X?
+      // The x_splits flags are insurance against rounding errors.
+      if (ecel.x != scel.x && TEST(x_splits, gcx)) {
+        // Split on the X grid line
+        CBI(x_splits, gcx);
+        dest = destination;
+        destination.x = index_to_xpos[gcx];
+        normalized_dist = (destination.x - current_position.x) / (dest.x - current_position.x);
+        destination.y = MBL_SEGMENT_END(y);
+      }
+      // Crosses on the Y and not already split on this Y?
+      else if (ecel.y != scel.y && TEST(y_splits, gcy)) {
+        // Split on the Y grid line
+        CBI(y_splits, gcy);
+        dest = destination;
+        destination.y = index_to_ypos[gcy];
+        normalized_dist = (destination.y - current_position.y) / (dest.y - current_position.y);
+        destination.x = MBL_SEGMENT_END(x);
+      }
+      else {
+        // Must already have been split on these border(s)
+        // This should be a rare case.
+        current_position = destination;
+        line_to_current_position(scaled_fr_mm_s);
+        return;
+      }
+
+      destination.z = MBL_SEGMENT_END(z);
+      destination.e = MBL_SEGMENT_END(e);
+
+      // Do the split and look for more borders
+      line_to_destination(scaled_fr_mm_s, x_splits, y_splits);
+
+      // Restore destination from stack
+      destination = dest;
+      line_to_destination(scaled_fr_mm_s, x_splits, y_splits);
+    }
+
+  #endif // IS_CARTESIAN && !SEGMENT_LEVELED_MOVES
+
+  void mesh_bed_leveling::report_mesh() {
+    SERIAL_ECHOPAIR_F(STRINGIFY(GRID_MAX_POINTS_X) "x" STRINGIFY(GRID_MAX_POINTS_Y) " mesh. Z offset: ", z_offset, 5);
+    SERIAL_ECHOLNPGM("\nMeasured points:");
+    print_2d_array(GRID_MAX_POINTS_X, GRID_MAX_POINTS_Y, 5,
+      [](const uint8_t ix, const uint8_t iy) { return z_values[ix][iy]; }
+    );
+  }
+
+#endif // MESH_BED_LEVELING