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#include "test_precomp.hpp"
#include "opencv2/core/affine.hpp"

namespace opencv_test { namespace {

TEST(Calib3d_Affine3f, accuracy)
{
    const double eps = 1e-5;
    cv::Vec3d rvec(0.2, 0.5, 0.3);
    cv::Affine3d affine(rvec);

    cv::Mat expected;
    cv::Rodrigues(rvec, expected);

    ASSERT_LE(cvtest::norm(cv::Mat(affine.matrix, false).colRange(0, 3).rowRange(0, 3), expected, cv::NORM_L2), eps);
    ASSERT_LE(cvtest::norm(cv::Mat(affine.linear()), expected, cv::NORM_L2), eps);

    cv::Matx33d R = cv::Matx33d::eye();

    double angle = 50;
    R.val[0] = R.val[4] = std::cos(CV_PI*angle/180.0);
    R.val[3] = std::sin(CV_PI*angle/180.0);
    R.val[1] = -R.val[3];


    cv::Affine3d affine1(cv::Mat(cv::Vec3d(0.2, 0.5, 0.3)).reshape(1, 1), cv::Vec3d(4, 5, 6));
    cv::Affine3d affine2(R, cv::Vec3d(1, 1, 0.4));

    cv::Affine3d result = affine1.inv() * affine2;

    expected = cv::Mat(affine1.matrix.inv(cv::DECOMP_SVD)) * cv::Mat(affine2.matrix, false);


    cv::Mat diff;
    cv::absdiff(expected, result.matrix, diff);

    ASSERT_LT(cvtest::norm(diff, cv::NORM_INF), 1e-15);
}

TEST(Calib3d_Affine3f, accuracy_rvec)
{
    cv::RNG rng;
    typedef float T;

    cv::Affine3<T>::Vec3 w;
    cv::Affine3<T>::Mat3 u, vt, R;

    for(int i = 0; i < 100; ++i)
    {
        rng.fill(R, cv::RNG::UNIFORM, -10, 10, true);
        cv::SVD::compute(R, w, u, vt, cv::SVD::FULL_UV + cv::SVD::MODIFY_A);
        R = u * vt;

        //double s = (double)cv::getTickCount();
        cv::Affine3<T>::Vec3 va = cv::Affine3<T>(R).rvec();
        //std::cout << "M:" <<(cv::getTickCount() - s)*1000/cv::getTickFrequency() << std::endl;

        cv::Affine3<T>::Vec3 vo;
        //s = (double)cv::getTickCount();
        cv::Rodrigues(R, vo);
        //std::cout << "O:" <<(cv::getTickCount() - s)*1000/cv::getTickFrequency() << std::endl;

        ASSERT_LT(cvtest::norm(va, vo, cv::NORM_L2), 1e-9);
    }
}

}} // namespace