X-Git-Url: http://git.maemo.org/git/?p=opencv;a=blobdiff_plain;f=tests%2Fcxcore%2Fsrc%2Fasolvepoly.cpp;fp=tests%2Fcxcore%2Fsrc%2Fasolvepoly.cpp;h=bbd16cddd40e5af6f3a010cc0944d68627da8125;hp=0000000000000000000000000000000000000000;hb=e4c14cdbdf2fe805e79cd96ded236f57e7b89060;hpb=454138ff8a20f6edb9b65a910101403d8b520643

diff --git a/tests/cxcore/src/asolvepoly.cpp b/tests/cxcore/src/asolvepoly.cpp
new file mode 100644
index 0000000..bbd16cd
--- /dev/null
+++ b/tests/cxcore/src/asolvepoly.cpp
@@ -0,0 +1,123 @@
+// 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