fixed a nasty bug with atan2 that occurred only with some Java 1.5 virtual machines

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/branches/MATH_2_X@1074294 13f79535-47bb-0310-9956-ffa450edef68
2011-02-24 21:18:59 +00:00 · 2011-02-24 21:18:59 +00:00 · f7da7733e6
parent 099ba74e92
commit f7da7733e6
1 changed files with 2 additions and 2 deletions
--- a/src/main/java/org/apache/commons/math/util/FastMath.java
+++ b/src/main/java/org/apache/commons/math/util/FastMath.java
@ -3046,8 +3046,8 @@ public class FastMath {
        rb = -(temp - ra - rb);
        ra = temp;

-        if (ra == 0 && (y < 0)) { // Fix up the sign so atan works correctly
-            ra = -0.0;
+        if (ra == 0) { // Fix up the sign so atan works correctly
+            ra = copySign(0.0, y);
        }

        // Call atan