Changeset 3175 for trunk/sources/HeuristicLab.ExtLibs

Timestamp:

03/22/10 15:48:39 (15 years ago)

Author:

mkommend

Message:

corrected bug in connection hit test (ticket #867)

File:

• trunk/sources/HeuristicLab.ExtLibs/HeuristicLab.Netron/3.0.2672.12446/Netron.Diagramming.Core-3.0.2672.12446/Diagram elements/Connections/Connection.cs (modified) (1 diff)

trunk/sources/HeuristicLab.ExtLibs/HeuristicLab.Netron/3.0.2672.12446/Netron.Diagramming.Core-3.0.2672.12446/Diagram elements/Connections/Connection.cs

@@ -193 +193 @@
       r1.Inflate(3, 3);
       r2.Inflate(3, 3);
-      //this is like a topological neighborhood
-      //the connection is shifted left and right
-      //and the point under consideration has to be in between.           
       if (RectangleF.Union(r1, r2).Contains(p))
       {
-        //if (p1.Y < p2.Y) //SWNE
-        //{
-        //  o = r1.Left + (((r2.Left - r1.Left) * (p.Y - r1.Bottom)) / (r2.Bottom - r1.Bottom));
-        //  u = r1.Right + (((r2.Right - r1.Right) * (p.Y - r1.Top)) / (r2.Top - r1.Top));
-        //  return ((p.X > o) && (p.X < u));
-        //} else //NWSE
-        //{
-        //  o = r1.Left + (((r2.Left - r1.Left) * (p.Y - r1.Top)) / (r2.Top - r1.Top));
-        //  u = r1.Right + (((r2.Right - r1.Right) * (p.Y - r1.Bottom)) / (r2.Bottom - r1.Bottom));
-        //  return ((p.X > o) && (p.X < u));
-        //}
-        return true;
+        PointF connectionVector = new PointF(p2.X - p1.X, p2.Y - p1.Y);
+        PointF normalVector = new PointF(connectionVector.Y, connectionVector.X * -1);
+        PointF pointVector = new PointF(p.X - p1.X, p.Y - p1.Y);
+
+        double normalVectorLength = Math.Sqrt(normalVector.X * normalVector.X + normalVector.Y * normalVector.Y);
+        double distance = Math.Abs(pointVector.X * normalVector.X + pointVector.Y * normalVector.Y) / normalVectorLength;
+
+        return distance < 5;
       }
       return false;