--- /dev/null
+// 2008-05-14, Xavier Delacour <xavier.delacour@gmail.com>
+
+#include "cxcoretest.h"
+
+#include <algorithm>
+#include <complex>
+#include <vector>
+#include <iostream>
+
+#if 0
+
+typedef std::complex<double> complex_type;
+
+struct pred_complex {
+ bool operator() (const complex_type& lhs, const complex_type& rhs) const
+ {
+ return lhs.real() != rhs.real() ? lhs.real() < rhs.real() : lhs.imag() < rhs.imag();
+ }
+};
+
+class CV_SolvePolyTest : public CvTest
+{
+public:
+ CV_SolvePolyTest();
+ ~CV_SolvePolyTest();
+protected:
+ virtual void run( int start_from );
+};
+
+CV_SolvePolyTest::CV_SolvePolyTest() : CvTest( "solve-poly", "cvSolvePoly" ) {}
+
+CV_SolvePolyTest::~CV_SolvePolyTest() {}
+
+void CV_SolvePolyTest::run( int )
+{
+ CvRNG rng = cvRNG();
+ int fig = 100;
+ double range = 50;
+
+ for (int idx = 0, max_idx = 1000, progress = 0; idx < max_idx; ++idx)
+ {
+ int n = cvRandInt(&rng) % 13 + 1;
+ std::vector<complex_type> r(n), ar(n), c(n + 1, 0);
+ std::vector<double> a(n + 1), u(n * 2);
+
+ int rr_odds = 3; // odds that we get a real root
+ for (int j = 0; j < n;)
+ {
+ if (cvRandInt(&rng) % rr_odds == 0 || j == n - 1)
+ r[j++] = cvRandReal(&rng) * range;
+ else
+ {
+ r[j] = complex_type(cvRandReal(&rng) * range,
+ cvRandReal(&rng) * range + 1);
+ r[j + 1] = std::conj(r[j]);
+ j += 2;
+ }
+ }
+
+ for (int j = 0, k = 1 << n, jj, kk; j < k; ++j)
+ {
+ int p = 0;
+ complex_type v(1);
+ for (jj = 0, kk = 1; jj < n && !(j & kk); ++jj, ++p, kk <<= 1)
+ ;
+ for (; jj < n; ++jj, kk <<= 1)
+ {
+ if (j & kk)
+ v *= -r[jj];
+ else
+ ++p;
+ }
+ c[p] += v;
+ }
+
+ bool pass = false;
+ double div;
+ for (int maxiter = 10; !pass && maxiter < 10000; maxiter *= 2)
+ {
+ for (int j = 0; j < n + 1; ++j)
+ a[j] = c[j].real();
+
+ CvMat amat, umat;
+ cvInitMatHeader(&amat, n + 1, 1, CV_64FC1, &a[0]);
+ cvInitMatHeader(&umat, n, 1, CV_64FC2, &u[0]);
+ cvSolvePoly(&amat, &umat, maxiter, fig);
+
+ for (int j = 0; j < n; ++j)
+ ar[j] = complex_type(u[j * 2], u[j * 2 + 1]);
+
+ sort(r.begin(), r.end(), pred_complex());
+ sort(ar.begin(), ar.end(), pred_complex());
+
+ div = 0;
+ double s = 0;
+ for (int j = 0; j < n; ++j)
+ {
+ s += r[j].real() + fabs(r[j].imag());
+ div += pow(r[j].real() - ar[j].real(), 2) + pow(r[j].imag() - ar[j].imag(), 2);
+ }
+ div /= s;
+ pass = div < 1e-2;
+ }
+
+ if (!pass)
+ {
+ ts->set_failed_test_info(CvTS::FAIL_INVALID_OUTPUT);
+ ts->printf( CvTS::LOG, "\n" );
+
+ for (size_t j=0;j<r.size();++j)
+ ts->printf( CvTS::LOG, "r[%d]=(%g, %g)\n", j, r[j].real(), r[j].imag());
+ ts->printf( CvTS::LOG, "\n" );
+ for (size_t j=0;j<ar.size();++j)
+ ts->printf( CvTS::LOG, "ar[%d]=(%g, %g)\n", j, ar[j].real(), ar[j].imag());
+ }
+
+ progress = update_progress(progress, idx-1, max_idx, 0);
+ }
+}
+
+CV_SolvePolyTest solve_poly_test;
+
+#endif