From 6d4bb10ec59bfee42bc95ef8ea7b3892573404f0 Mon Sep 17 00:00:00 2001
From: Lukas Matena <lukasmatena@seznam.cz>
Date: Wed, 12 Aug 2020 11:28:30 +0200
Subject: [PATCH] Fix of custom supports: object offset for Clipper was
 incorrectly accounted for

---
 src/libslic3r/PrintObject.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index 0f1a91a92..c90a05ef3 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -2733,7 +2733,7 @@ void PrintObject::project_and_append_custom_supports(
             std::array<Vec2f, 3> trianglef;
             for (int i=0; i<3; ++i) {
                 trianglef[i] = Vec2f(facet[i].x(), facet[i].y());
-                trianglef[i] += Vec2f(unscale<float>(this->center_offset().x()),
+                trianglef[i] -= Vec2f(unscale<float>(this->center_offset().x()),
                                       unscale<float>(this->center_offset().y()));
             }