From e65d2803b0eb02c30b0e659413555a9712585e37 Mon Sep 17 00:00:00 2001
From: Thomas Fischer <thomas.fischer@ufz.de>
Date: Mon, 3 Mar 2014 10:33:00 +0100
Subject: [PATCH] [MathLib] Vector3: Impl. and test for normalization.
---
MathLib/Vector3.h | 10 ++++++++++
Tests/MathLib/TestVector3.cpp | 5 +++++
2 files changed, 15 insertions(+)
diff --git a/MathLib/Vector3.h b/MathLib/Vector3.h
index 55b36bc8347..4650d1f4268 100644
--- a/MathLib/Vector3.h
+++ b/MathLib/Vector3.h
@@ -127,6 +127,16 @@ public:
return *this;
}
+ /**
+ * After applying the normalize operator to the vector its length is 1.0.
+ */
+ void normalize()
+ {
+ const double s(1/length());
+ for (std::size_t i(0); i < 3; i++)
+ this->_x[i] *= s;
+ }
+
/// Returns the length
double length(void) const
{
diff --git a/Tests/MathLib/TestVector3.cpp b/Tests/MathLib/TestVector3.cpp
index 056fd9372fc..97274075ca4 100644
--- a/Tests/MathLib/TestVector3.cpp
+++ b/Tests/MathLib/TestVector3.cpp
@@ -155,5 +155,10 @@ TEST(MathLib, TestVector3Multiplications)
ASSERT_NEAR(1.0, v[0], std::numeric_limits<double>::epsilon());
ASSERT_NEAR(3.0, v[1], std::numeric_limits<double>::epsilon());
ASSERT_NEAR(5.0, v[2], std::numeric_limits<double>::epsilon());
+
+ // test normalisation
+ v.normalize();
+ ASSERT_NEAR(1.0, v.length(), std::numeric_limits<double>::epsilon());
+
}
--
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