From faceb2421cbcfd0e09f5f23a3e31d093111eec1d Mon Sep 17 00:00:00 2001
From: "Albachten, Rudy" <rudy.albachten@intel.com>
Date: Wed, 21 May 2025 14:59:59 -0700
Subject: [PATCH] Fix polygon_90_set_data::interact

This method was producing incorrect results if the left hand object
was not already normalized (i.e. dirty)
---
 include/boost/polygon/polygon_90_set_data.hpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/boost/polygon/polygon_90_set_data.hpp b/include/boost/polygon/polygon_90_set_data.hpp
index 2c640bf1..ad6e3087 100644
--- a/include/boost/polygon/polygon_90_set_data.hpp
+++ b/include/boost/polygon/polygon_90_set_data.hpp
@@ -788,6 +788,7 @@ namespace boost { namespace polygon{
 
     inline polygon_90_set_data& interact(const polygon_90_set_data& that) {
       typedef coordinate_type Unit;
+      if(dirty_) clean();
       if(that.dirty_) that.clean();
       typename touch_90_operation<Unit>::TouchSetData tsd;
       touch_90_operation<Unit>::populateTouchSetData(tsd, that.data_, 0);