From 465ffff162ab268d721ef69a2d66680727ed455f Mon Sep 17 00:00:00 2001
From: jean-pierre charras <jp.charras@wanadoo.fr>
Date: Mon, 3 Feb 2020 17:40:08 +0100
Subject: [PATCH] Gerber plots: Add initial G01 command to the header, to
 ensure linear interpolation mode. To avoid issues, an interpolation mode must
 be set before first D01 command.

---
 common/plotters/GERBER_plotter.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/common/plotters/GERBER_plotter.cpp b/common/plotters/GERBER_plotter.cpp
index abaeba6c47..f4b210a419 100644
--- a/common/plotters/GERBER_plotter.cpp
+++ b/common/plotters/GERBER_plotter.cpp
@@ -234,6 +234,10 @@ bool GERBER_PLOTTER::StartPlot()
     // Be sure the usual dark polarity is selected:
     fputs( "%LPD*%\n", outputFile );
 
+    // Set initial interpolation mode: always G01 (linear):
+    fputs( "G01*\n", outputFile );
+
+    // Set aperture list starting point:
     fputs( "G04 APERTURE LIST*\n", outputFile );
 
     return true;