Prefactor for 1D distributions was corrected.

Core/Algorithms/src/FTDistributions.cpp

@@ -62,7 +62,7 @@ FTDistribution1DGauss* FTDistribution1DGauss::clone() const
 double FTDistribution1DGauss::evaluate(double q) const
 {
     double sum_sq = q*q*m_omega*m_omega;
-    return std::exp(-sum_sq/4.0);
+    return 0.5*std::exp(-sum_sq/4.0);
 }
 
 FTDistribution1DVoigt::FTDistribution1DVoigt(double omega, double eta)

Core/Samples/src/InterferenceFunction1DLattice.cpp

@@ -47,7 +47,7 @@ void InterferenceFunction1DLattice::setProbabilityDistribution(
     mp_pdf = pdf.clone();
     double omega = mp_pdf->getOmega();
 //     initialize_calc_factors(omega):
-    m_prefactor = 2.0*M_PI*omega;
+    m_prefactor = M_PI*omega;
     double qa_max = (m_lattice_params.m_length/(2*M_PI))*nmax/omega;
     m_na = (int) (std::abs(qa_max) + 0.5);
 }

Tests/UnitTests/TestCore/FTDistributionsTest.h

@@ -46,7 +46,7 @@ TEST_F(FTDistributionsTest, FTDistribution1DGaussConstructor)
     IFTDistribution1D * iftd1D = new FTDistribution1DGauss(1.0);
     EXPECT_EQ(1.0, iftd1D->getOmega());
     EXPECT_EQ("1DDistributionGauss", iftd1D->getName());
-    EXPECT_NEAR(2*0.4950249, iftd1D->evaluate(0.2),0.000001);
+    EXPECT_NEAR(0.4950249, iftd1D->evaluate(0.2),0.000001);
 
     iftd1D->setOmega(3.0);
     EXPECT_EQ(3.0, iftd1D->getOmega());
@@ -61,7 +61,7 @@ TEST_F(FTDistributionsTest, FTDistribution1DGaussClone)
 
     EXPECT_EQ(-5.0, iftd1DClone->getOmega());
     EXPECT_EQ("1DDistributionGauss", iftd1DClone->getName());
-    EXPECT_NEAR(2*0.389400, iftd1DClone->evaluate(0.2),0.000001);
+    EXPECT_NEAR(0.389400, iftd1DClone->evaluate(0.2),0.000001);
 
     delete iftd1D;
     delete iftd1DClone;

Tests/UnitTests/TestCore/FormFactorTest.h

@@ -553,7 +553,6 @@ TEST_F(FormFactorTest, InfLongBox)
 {
     double height = 15.;
     double width = 100.0/M_PI;
-    double volume = 2*M_PI*height*width;
 
     FormFactorInfLongBox ilbox(width, height);