changed from isnormal to isfinite, the prev ignored zero

modules/imgproc/include/opencv2/imgproc.hpp

@@ -462,7 +462,11 @@ enum { COLOR_BGR2BGRA     = 0,
        COLOR_COLORCVT_MAX  = 139
 };
 
-
+//! types of intersection between rectangles
+enum { INTERSECT_NONE = 0,
+       INTERSECT_PARTIAL  = 1,
+       INTERSECT_FULL  = 2
+     };
 
 /*!
  The Base Class for 1D or Row-wise Filters
@@ -1415,7 +1419,7 @@ CV_EXPORTS_W void fitLine( InputArray points, OutputArray line, int distType,
 CV_EXPORTS_W double pointPolygonTest( InputArray contour, Point2f pt, bool measureDist );
 
 //! computes whether two rotated rectangles intersect and returns the vertices of the intersecting region
-CV_EXPORTS_W bool rotatedRectangleIntersection( const RotatedRect& rect1, const RotatedRect& rect2, OutputArray intersectingRegion  );
+CV_EXPORTS_W int rotatedRectangleIntersection( const RotatedRect& rect1, const RotatedRect& rect2, OutputArray intersectingRegion  );
 
 CV_EXPORTS Ptr<CLAHE> createCLAHE(double clipLimit = 40.0, Size tileGridSize = Size(8, 8));
 

modules/imgproc/src/intersection.cpp

@@ -47,7 +47,7 @@
 namespace cv
 {
 
-bool rotatedRectangleIntersection( const RotatedRect& rect1, const RotatedRect& rect2, OutputArray intersectingRegion )
+int rotatedRectangleIntersection( const RotatedRect& rect1, const RotatedRect& rect2, OutputArray intersectingRegion )
 {
     const float samePointEps = 0.00001; // used to test if two points are the same, due to numerical error
 
@@ -59,6 +59,8 @@ bool rotatedRectangleIntersection( const RotatedRect& rect1, const RotatedRect&
     rect1.points(pts1);
     rect2.points(pts2);
 
+    int ret = INTERSECT_FULL;
+
     // Line vector
     // A line from p1 to p2 is: p1 + (p2-p1)*t, t=[0,1]
     for( int i = 0; i < 4; i++ )
@@ -91,7 +93,7 @@ bool rotatedRectangleIntersection( const RotatedRect& rect1, const RotatedRect&
             float t2 = (vx1*y21 - vy1*x21) / det;
 
             // This takes care of parallel lines
-            if( !std::isnormal(t1) || !std::isnormal(t2) )
+            if( !std::isfinite(t1) || !std::isfinite(t2) )
             {
                 continue;
             }
@@ -106,6 +108,11 @@ bool rotatedRectangleIntersection( const RotatedRect& rect1, const RotatedRect&
         }
     }
 
+    if( !intersection.empty() )
+    {
+        ret = INTERSECT_PARTIAL;
+    }
+
     // Check for vertices from rect1 inside recct2
     for( int i = 0; i < 4; i++ )
     {
@@ -203,23 +210,12 @@ bool rotatedRectangleIntersection( const RotatedRect& rect1, const RotatedRect&
 
     if( intersection.empty() )
     {
-        return false;
+        return INTERSECT_NONE ;
     }
 
-    //intersectingRegion.create(intersection.size(), 2, CV_32F);
-
-  //  Mat ret = intersectingRegion.getMat();
-
     Mat(intersection).copyTo(intersectingRegion);
 
-//    size_t step = !m.isContinuous() ? m.step[0] : sizeof(Point2f);
-
-//    for( size_t i = 0; i < intersection.size(); i++ )
-//    {
-//        *(Point2f*)(m.data + i*step) = intersection[i];
-//    }
-
-    return true;
+    return ret;
 }
 
 }