From 5c72eecf26a63868ea04751a956f6088fc58f0e7 Mon Sep 17 00:00:00 2001
From: bubnikv <bubnikv@gmail.com>
Date: Mon, 9 Sep 2019 17:47:29 +0200
Subject: [PATCH] Fix of "Strange behavior on bridge detection" #1482 The very
 first slicing step needs to be invalidated if support is enabled or disabled
 while the soluble supports are configured, as the bridging is disabled for
 soluble supports, while the bridging is enabled with supports disabled.

---
 src/libslic3r/PrintObject.cpp | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index 04bbc6f5d..632edeaa6 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -468,9 +468,17 @@ bool PrintObject::invalidate_state_by_config_options(const std::vector<t_config_
             || opt_key == "support_material_contact_distance" 
             || opt_key == "xy_size_compensation") {
             steps.emplace_back(posSlice);
+        } else if (opt_key == "support_material") {
+            steps.emplace_back(posSupportMaterial);
+            if (m_config.support_material_contact_distance == 0.) {
+            	// Enabling / disabling supports while soluble support interface is enabled.
+            	// This changes the bridging logic (bridging enabled without supports, disabled with supports).
+            	// Reset everything.
+            	// See GH #1482 for details.
+	            steps.emplace_back(posSlice);
+	        }
         } else if (
-               opt_key == "support_material"
-            || opt_key == "support_material_auto"
+        	   opt_key == "support_material_auto"
             || opt_key == "support_material_angle"
             || opt_key == "support_material_buildplate_only"
             || opt_key == "support_material_enforce_layers"