From 30bb96aa4719897f698a8ab11a4633b8c4e8e520 Mon Sep 17 00:00:00 2001
From: Arthur <arthur.tang@bambulab.com>
Date: Sun, 29 Jan 2023 15:21:28 +0800
Subject: [PATCH] FIX: spiral mode couldn't be enabled

Support layers should be released in is_support_necessary.

Jira: STUDIO-2120
Change-Id: Id1c6fa2d8635e55be745095408dfbac38a25efa6
(cherry picked from commit f911e8d084c4fa273f8c9211112fa2f83515cfb1)
---
 src/libslic3r/PrintObject.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index 742349223e..2e98eb98e5 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -2630,6 +2630,7 @@ SupportNecessaryType PrintObject::is_support_necessary()
 #else
     TreeSupport tree_support(*this, m_slicing_params);
     tree_support.detect_overhangs();
+    this->clear_support_layers();
     if (tree_support.has_sharp_tails)
         return SharpTail;
     else if (tree_support.has_cantilever)