test_splines.cpp
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00034 
00037 #include <gtest/gtest.h>
00038 #include <spline_smoother/splines.h>
00039 #include <stdlib.h>
00040 
00041 using namespace spline_smoother;
00042 
00043 static double getRandomNumber(double min, double max)
00044 {
00045   return ((double)rand() / RAND_MAX)*(max-min) + min;
00046 }
00047 
00048 TEST(TestSplines, testQuinticCoefficients)
00049 {
00050   // seed the random number generator:
00051   srand(0);
00052 
00053   // generate random boundary conditions:
00054   double bc[6];
00055   for (int i=0; i<6; i++)
00056     bc[i] = getRandomNumber(-1.0, 1.0);
00057 
00058   // and a random time:
00059   double time = getRandomNumber(0.5,10.0);
00060 
00061   // get the spline coefficients:
00062   std::vector<double> coeffs;
00063   getQuinticSplineCoefficients(bc[0], bc[1], bc[2], bc[3], bc[4], bc[5], time, coeffs);
00064 
00065   // now sample the spline at t=0 and t=time to cross-check
00066   double test_bc[6];
00067   sampleQuinticSpline(coeffs, 0, test_bc[0], test_bc[1], test_bc[2]);
00068   sampleQuinticSpline(coeffs, time, test_bc[3], test_bc[4], test_bc[5]);
00069 
00070   double tolerance=1e-10;
00071 
00072   EXPECT_NEAR(bc[0], test_bc[0], tolerance);
00073   EXPECT_NEAR(bc[1], test_bc[1], tolerance);
00074   EXPECT_NEAR(bc[2], test_bc[2], tolerance);
00075   EXPECT_NEAR(bc[3], test_bc[3], tolerance);
00076   EXPECT_NEAR(bc[4], test_bc[4], tolerance);
00077   EXPECT_NEAR(bc[5], test_bc[5], tolerance);
00078 }
00079 
00080 TEST(TestSplines, testCubicCoefficients)
00081 {
00082   // seed the random number generator:
00083   srand(1);
00084 
00085   // generate random boundary conditions:
00086   double bc[4];
00087   for (int i=0; i<4; i++)
00088     bc[i] = getRandomNumber(-1.0, 1.0);
00089 
00090   // and a random time:
00091   double time = getRandomNumber(0.5,10.0);
00092 
00093   // get the spline coefficients:
00094   std::vector<double> coeffs;
00095   getCubicSplineCoefficients(bc[0], bc[1], bc[2], bc[3], time, coeffs);
00096 
00097   // now sample the spline at t=0 and t=time to cross-check
00098   double test_bc[4];
00099   double dummy;
00100   sampleCubicSpline(coeffs, 0, test_bc[0], test_bc[1], dummy);
00101   sampleCubicSpline(coeffs, time, test_bc[2], test_bc[3], dummy);
00102 
00103   double tolerance=1e-10;
00104 
00105   EXPECT_NEAR(bc[0], test_bc[0], tolerance);
00106   EXPECT_NEAR(bc[1], test_bc[1], tolerance);
00107   EXPECT_NEAR(bc[2], test_bc[2], tolerance);
00108   EXPECT_NEAR(bc[3], test_bc[3], tolerance);
00109 }
00110 
00111 int main(int argc, char** argv)
00112 {
00113  testing::InitGoogleTest(&argc, argv);
00114  return RUN_ALL_TESTS();
00115 }


spline_smoother
Author(s): Mrinal Kalakrishnan / mail@mrinal.net
autogenerated on Thu Dec 12 2013 11:09:51