X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fvector.cpp;h=57f49fbb8b1d4bc7ae1566c91cdb58586691895f;hb=eb39f1bb5e6518c5dc4f4dbd3c88912a97192e95;hp=23b429902c2b22b892e25f8ab9cbb57813981f4c;hpb=84fc4387b9a6051819da5c9ed688de1ec372c7f7;p=architektonas

diff --git a/src/vector.cpp b/src/vector.cpp
index 23b4299..57f49fb 100644
--- a/src/vector.cpp
+++ b/src/vector.cpp
@@ -194,7 +194,8 @@ Vector Vector::Unit(void)
 {
 	double mag = Magnitude();
 
-	// If the magnitude of the vector is zero, then the Unit vector is undefined...
+	// If the magnitude of the vector is zero, then the Unit vector is
+	// undefined...
 	if (mag == 0)
 		return Vector(0, 0, 0);
 
@@ -204,17 +205,17 @@ Vector Vector::Unit(void)
 
 double Vector::Magnitude(void)
 {
-	return sqrt(x * x + y * y + z * z);
+	return sqrt((x * x) + (y * y) + (z * z));
 }
 
 
 double Vector::Angle(void)
 {
-	// acos returns a value between zero and PI, which means we don't know which
-	// quadrant the angle is in... Though, if the y-coordinate of the vector is
-	// negative, that means that the angle is in quadrants III - IV.
+	// acos returns a value between zero and TAU/2, which means we don't know
+	// which quadrant the angle is in... However, if the y-coordinate of the
+	// vector is negative, that means that the angle is in quadrants III - IV.
 	double rawAngle = acos(Unit().x);
-	double correctedAngle = (y < 0 ? (2.0 * PI) - rawAngle : rawAngle);
+	double correctedAngle = (y < 0 ? TAU - rawAngle : rawAngle);
 
 	return correctedAngle;
 }
@@ -285,10 +286,10 @@ bool Vector::isZero(double epsilon/*= 1e-6*/)
 	// This is done using the following formula:
 	// (a . b) = ||a|| ||b|| cos(theta)
 	// However, have to check for two degenerate cases, where a = cb:
-	// 1, if c > 0, theta = 0; 2, if c < 0, theta = 180°.
+	// 1) if c > 0, theta = 0; 2) if c < 0, theta = 180°.
 	// Also, the vectors a & b have to be non-zero.
 	// Also, have to check using an epsilon because acos will not return an
-	// exact value if the vectors are orthogonal
+	// exact value if the vectors are orthogonal.
 	if (a.isZero() || b.isZero())
 		return 0;