STYLE: use itk::Math::abs instead of fabs

src/rtkThreeDCircularProjectionGeometry.cxx

@@ -165,7 +165,7 @@ rtk::ThreeDCircularProjectionGeometry::AddProjection(const PointType &  sourcePo
   const PointType &  S = sourcePosition;          // source pos
   const PointType &  R = detectorPosition;        // detector pos
 
-  if (fabs(r * c) > 1e-6) // non-orthogonal row/column vectors
+  if (itk::Math::abs(r * c) > 1e-6) // non-orthogonal row/column vectors
     return false;
 
   // Euler angles (ZXY convention) from detector orientation in IEC-based WCS:
@@ -685,7 +685,7 @@ rtk::ThreeDCircularProjectionGeometry::VerifyAngles(const double          outOfP
 
   for (int i = 0; i < 3; i++) // check whether matrices match
     for (int j = 0; j < 3; j++)
-      if (fabs(rm[i][j] - m[i][j]) > EPSILON)
+      if (itk::Math::abs(rm[i][j] - m[i][j]) > EPSILON)
         return false;
 
   return true;
@@ -700,7 +700,7 @@ rtk::ThreeDCircularProjectionGeometry::FixAngles(double &              outOfPlan
   const Matrix3x3Type & rm = referenceMatrix; // shortcut
   const double          EPSILON = 1e-6;       // internal tolerance for comparison
 
-  if (fabs(fabs(rm[2][1]) - 1.) > EPSILON)
+  if (itk::Math::abs(itk::Math::abs(rm[2][1]) - 1.) > EPSILON)
   {
     double oa = NAN, ga = NAN, ia = NAN;