SEG: Correct sign in LineDistance

libs/kimath/src/geometry/seg.cpp

@@ -441,7 +441,7 @@ int SEG::LineDistance( const VECTOR2I& aP, bool aDetermineSide ) const
 
     ecoord dist = isqrt( dist_sq );
 
-    return static_cast<int>( aDetermineSide ? dist : std::abs( dist ) );
+    return static_cast<int>( aDetermineSide ? sgn( det ) * dist : std::abs( dist ) );
 }
 
 

qa/tests/libs/kimath/geometry/test_segment.cpp

@@ -716,4 +716,20 @@ BOOST_AUTO_TEST_CASE( SegCreatePerpendicular )
     }
 }
 
+BOOST_AUTO_TEST_CASE( LineDistance )
+{
+    SEG seg( { 0, 0 }, { 10, 0 } );
+
+    BOOST_TEST( seg.LineDistance( { 5, 0 } ) == 0 );
+    BOOST_TEST( seg.LineDistance( { 5, 8 } ) == 8 );
+}
+
+BOOST_AUTO_TEST_CASE( LineDistanceSided )
+{
+    SEG seg( { 0, 0 }, { 10, 0 } );
+
+    BOOST_TEST( seg.LineDistance( { 5, 8 }, true ) == 8 );
+    BOOST_TEST( seg.LineDistance( { 5, -8 }, true ) == -8 );
+}
+
 BOOST_AUTO_TEST_SUITE_END()