From e9ce42353edd47edeaef242d4eeccfb8e519cd7d Mon Sep 17 00:00:00 2001
From: Scott Lahteine <sourcetree@thinkyhead.com>
Date: Tue, 20 Sep 2016 04:46:41 -0500
Subject: [PATCH] Patch G29 for 3-point leveling

---
 Marlin/Conditionals_post.h |  1 +
 Marlin/Marlin_main.cpp     | 16 ++++++++++------
 Marlin/qr_solve.cpp        |  2 +-
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/Marlin/Conditionals_post.h b/Marlin/Conditionals_post.h
index 3f7730753..2eb3cf474 100644
--- a/Marlin/Conditionals_post.h
+++ b/Marlin/Conditionals_post.h
@@ -676,6 +676,7 @@
       #define AUTO_BED_LEVELING_NONLINEAR
     #else
       #define AUTO_BED_LEVELING_LINEAR
+      #define AUTO_BED_LEVELING_LINEAR_GRID
     #endif
   #endif
 
diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 1f86f88dc..63dfcf76b 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -38,7 +38,7 @@
   #include "vector_3.h"
 #endif
 
-#if ENABLED(AUTO_BED_LEVELING_LINEAR)
+#if ENABLED(AUTO_BED_LEVELING_LINEAR_GRID)
   #include "qr_solve.h"
 #elif ENABLED(MESH_BED_LEVELING)
   #include "mesh_bed_leveling.h"
@@ -3453,7 +3453,7 @@ inline void gcode_G28() {
         float zoffset = zprobe_zoffset;
         if (code_seen('Z')) zoffset += code_value_axis_units(Z_AXIS);
 
-      #elif ENABLED(AUTO_BED_LEVELING_LINEAR)
+      #elif ENABLED(AUTO_BED_LEVELING_LINEAR_GRID)
 
         /**
          * solve the plane equation ax + by + d = z
@@ -3471,7 +3471,7 @@ inline void gcode_G28() {
                mean = 0.0;
         int indexIntoAB[abl_grid_points_x][abl_grid_points_y];
 
-      #endif // AUTO_BED_LEVELING_LINEAR
+      #endif // AUTO_BED_LEVELING_LINEAR_GRID
 
       int probePointCounter = 0;
       bool zig = abl_grid_points_y & 1; //always end at [RIGHT_PROBE_BED_POSITION, BACK_PROBE_BED_POSITION]
@@ -3506,7 +3506,7 @@ inline void gcode_G28() {
 
           measured_z = probe_pt(xProbe, yProbe, stow_probe_after_each, verbose_level);
 
-          #if ENABLED(AUTO_BED_LEVELING_LINEAR)
+          #if ENABLED(AUTO_BED_LEVELING_LINEAR_GRID)
 
             mean += measured_z;
             eqnBVector[probePointCounter] = measured_z;
@@ -3576,7 +3576,7 @@ inline void gcode_G28() {
       if (!dryrun) extrapolate_unprobed_bed_level();
       print_bed_level();
 
-    #elif ENABLED(AUTO_BED_LEVELING_LINEAR)
+    #elif ENABLED(AUTO_BED_LEVELING_LINEAR_GRID)
 
       // For LINEAR leveling calculate matrix, print reports, correct the position
 
@@ -3673,6 +3673,10 @@ inline void gcode_G28() {
         }
       } //do_topography_map
 
+    #endif // AUTO_BED_LEVELING_LINEAR_GRID
+
+    #if ENABLED(AUTO_BED_LEVELING_LINEAR)
+
       // For LINEAR and 3POINT leveling correct the current position
 
       if (verbose_level > 0)
@@ -6759,7 +6763,7 @@ void tool_change(const uint8_t tmp_extruder, const float fr_mm_s/*=0.0*/, bool n
             float xydiff[2] = { offset_vec.x, offset_vec.y };
             current_position[Z_AXIS] += offset_vec.z;
 
-          #else // !AUTO_BED_LEVELING_FEATURE
+          #else // !AUTO_BED_LEVELING_LINEAR
 
             float xydiff[2] = {
               hotend_offset[X_AXIS][tmp_extruder] - hotend_offset[X_AXIS][active_extruder],
diff --git a/Marlin/qr_solve.cpp b/Marlin/qr_solve.cpp
index e60b1d327..0fadd6706 100644
--- a/Marlin/qr_solve.cpp
+++ b/Marlin/qr_solve.cpp
@@ -22,7 +22,7 @@
 
 #include "qr_solve.h"
 
-#if ENABLED(AUTO_BED_LEVELING_LINEAR)
+#if ENABLED(AUTO_BED_LEVELING_LINEAR_GRID)
 
 #include <stdlib.h>
 #include <math.h>