From e79666a82b7fd907ed0210c034342f851daad1b8 Mon Sep 17 00:00:00 2001
From: Robby Candra <robbycandra.mail@gmail.com>
Date: Fri, 11 Oct 2019 09:16:37 +0700
Subject: [PATCH] Followup to "Fix G2/G3 rounding" (#15510)
---
Marlin/src/gcode/motion/G2_G3.cpp | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/Marlin/src/gcode/motion/G2_G3.cpp b/Marlin/src/gcode/motion/G2_G3.cpp
index edace2b63e..6fecbdc0cc 100644
--- a/Marlin/src/gcode/motion/G2_G3.cpp
+++ b/Marlin/src/gcode/motion/G2_G3.cpp
@@ -290,8 +290,8 @@ void GcodeSuite::G2_G3(const bool clockwise) {
len = d2.magnitude(), // Distance to mid-point of move from current
h2 = (r - len) * (r + len), // factored to reduce rounding error
h = (h2 >= 0) ? SQRT(h2) : 0.0f; // Distance to the arc pivot-point from midpoint
- const xy_pos_t s = { -d2.y, d2.x } / len; // Unit vector along perpendicular bisector
- arc_offset = d2 + s * e * h; // The calculated offset (mid-point if |r| <= len)
+ const xy_pos_t s = { -d2.y, d2.x }; // Perpendicular bisector. (Divide by len for unit vector.)
+ arc_offset = d2 + s / len * e * h; // The calculated offset (mid-point if |r| <= len)
}
}
}