From fad64ec2ac01317bfbe39ed6c8a57ed465890d38 Mon Sep 17 00:00:00 2001
From: David Blyth <dblyth@anl.gov>
Date: Mon, 26 Jun 2017 23:34:27 +0000
Subject: [PATCH] Added Java Fast Math for fast acos()
---
detector-framework/pom.xml | 5 +++++
.../src/main/java/org/lcsim/detector/solids/GeomOp3D.java | 3 ++-
2 files changed, 7 insertions(+), 1 deletion(-)
diff --git a/detector-framework/pom.xml b/detector-framework/pom.xml
index 396e5ae..0937907 100644
--- a/detector-framework/pom.xml
+++ b/detector-framework/pom.xml
@@ -105,6 +105,11 @@
<artifactId>reflections</artifactId>
<version>0.9.9</version>
</dependency>
+ <dependency>
+ <groupId>net.jafama</groupId>
+ <artifactId>jafama</artifactId>
+ <version>2.1.0</version>
+ </dependency>
</dependencies>
</project>
diff --git a/detector-framework/src/main/java/org/lcsim/detector/solids/GeomOp3D.java b/detector-framework/src/main/java/org/lcsim/detector/solids/GeomOp3D.java
index 42b4b6f..90cb5b0 100644
--- a/detector-framework/src/main/java/org/lcsim/detector/solids/GeomOp3D.java
+++ b/detector-framework/src/main/java/org/lcsim/detector/solids/GeomOp3D.java
@@ -3,6 +3,7 @@ package org.lcsim.detector.solids;
import hep.physics.matrix.BasicMatrix;
import hep.physics.vec.Hep3Vector;
import hep.physics.vec.VecOp;
+import net.jafama.FastMath;
import java.util.List;
@@ -130,7 +131,7 @@ public class GeomOp3D
}
else
{
- angle_sum += Math.acos(VecOp.dot(v1_vec,v2_vec)/(v1_mag*v2_mag));
+ angle_sum += net.jafama.FastMath.acos(VecOp.dot(v1_vec,v2_vec)/(v1_mag*v2_mag));
}
}
--
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