commit a1e0ef4836f59a9fd5a2b44ecb94c27227e159c6
author Keisuke Kuroyanagi <ksk@google.com> Fri Mar 07 13:03:34 2014 +0900
committer Keisuke Kuroyanagi <ksk@google.com> Fri Mar 07 14:19:52 2014 +0900
tree 11d85eba7dcb21c70ef013b971e0294bd65b0692
parent 33392248136d030463f5bac15c3cacfde320972c

Fix: point to line segment distance can be NaN.

Change-Id: I7db6bfea925a0eda82bfb1f7b5e1110b193dabdb

native/jni/src/suggest/core/layout/proximity_info_utils.h

diff --git a/native/jni/src/suggest/core/layout/proximity_info_utils.h b/native/jni/src/suggest/core/layout/proximity_info_utils.h
index 6d2c11b..f55ee23 100644
--- a/native/jni/src/suggest/core/layout/proximity_info_utils.h
+++ b/native/jni/src/suggest/core/layout/proximity_info_utils.h
@@ -100,6 +100,10 @@
         const float dotProduct = ray1x * ray2x + ray1y * ray2y;
         const float lineLengthSqr = GeometryUtils::SQUARE_FLOAT(ray2x)
                 + GeometryUtils::SQUARE_FLOAT(ray2y);
+        if (lineLengthSqr <= 0.0f) {
+            // Return point to the point distance.
+            return getSquaredDistanceFloat(x, y, x1, y1);
+        }
         const float projectionLengthSqr = dotProduct / lineLengthSqr;
 
         float projectionX;