From 55355a4fb897537af511a75878c8b2005685ee82 Mon Sep 17 00:00:00 2001
From: Scott Lahteine <sourcetree@thinkyhead.com>
Date: Fri, 19 Aug 2016 01:14:36 -0500
Subject: [PATCH] Make probed points more symmetrical
---
Marlin/Marlin_main.cpp | 10 ++++++----
1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index faaa4c90a4..79d937d242 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -3609,8 +3609,8 @@ inline void gcode_G28() {
#if ENABLED(AUTO_BED_LEVELING_GRID)
// probe at the points of a lattice grid
- const int xGridSpacing = (right_probe_bed_position - left_probe_bed_position) / (auto_bed_leveling_grid_points - 1),
- yGridSpacing = (back_probe_bed_position - front_probe_bed_position) / (auto_bed_leveling_grid_points - 1);
+ const float xGridSpacing = (right_probe_bed_position - left_probe_bed_position) / (auto_bed_leveling_grid_points - 1),
+ yGridSpacing = (back_probe_bed_position - front_probe_bed_position) / (auto_bed_leveling_grid_points - 1);
#if ENABLED(DELTA)
delta_grid_spacing[X_AXIS] = xGridSpacing;
@@ -3639,7 +3639,8 @@ inline void gcode_G28() {
bool zig = (auto_bed_leveling_grid_points & 1) ? true : false; //always end at [RIGHT_PROBE_BED_POSITION, BACK_PROBE_BED_POSITION]
for (int yCount = 0; yCount < auto_bed_leveling_grid_points; yCount++) {
- double yProbe = front_probe_bed_position + yGridSpacing * yCount;
+ float yBase = front_probe_bed_position + yGridSpacing * yCount,
+ yProbe = floor(yProbe + (yProbe < 0 ? 0 : 0.5));
int xStart, xStop, xInc;
if (zig) {
@@ -3656,7 +3657,8 @@ inline void gcode_G28() {
zig = !zig;
for (int xCount = xStart; xCount != xStop; xCount += xInc) {
- double xProbe = left_probe_bed_position + xGridSpacing * xCount;
+ float xBase = left_probe_bed_position + xGridSpacing * xCount,
+ xProbe = floor(xProbe + (xProbe < 0 ? 0 : 0.5));
#if ENABLED(DELTA)
// Avoid probing outside the round or hexagonal area of a delta printer