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//
// Test Suite for C-API GEOSDistance
#include <tut/tut.hpp>
// geos
#include <geos_c.h>
#include <geos/constants.h>
// std
#include <algorithm>
#include <cstdio>
#include <cstdlib>
#include <fenv.h>
#include <cmath>
#include "capi_test_utils.h"
namespace tut {
//
// Test Group
//
// Common data used in test cases.
struct test_capigeosdistance_data : public capitest::utility {
test_capigeosdistance_data() {};
GEOSGeometry*
random_polygon(double x, double y, double r, std::size_t num_points)
{
std::vector<double> angle(num_points);
std::vector<double> radius(num_points);
for(std::size_t i = 0; i < num_points; i++) {
angle[i] = 2 * geos::MATH_PI * std::rand() / RAND_MAX;
radius[i] = r * std::rand() / RAND_MAX;
}
std::sort(angle.begin(), angle.end());
GEOSCoordSequence* seq_1 = GEOSCoordSeq_create(static_cast<unsigned int>(num_points), 2);
for(unsigned int i = 0; i < num_points; i++) {
auto idx = i == (num_points - 1) ? 0 : i;
GEOSCoordSeq_setX(seq_1, i, x + radius[idx] * cos(angle[idx]));
GEOSCoordSeq_setY(seq_1, i, y + radius[idx] * sin(angle[idx]));
}
return GEOSGeom_createPolygon(GEOSGeom_createLinearRing(seq_1), nullptr, 0);
}
};
typedef test_group<test_capigeosdistance_data> group;
typedef group::object object;
group test_capigeosdistance_group("capi::GEOSDistance");
//
// Test Cases
//
/// See http://trac.osgeo.org/geos/ticket/377
template<>
template<>
void object::test<1>
()
{
geom1_ = fromWKT("POINT(10 10)");
geom2_ = fromWKT("POINT(3 6)");
double dist;
int ret = GEOSDistance(geom1_, geom2_, &dist);
ensure_equals(ret, 1);
ensure_distance(dist, 8.06225774829855, 1e-12);
}
/* Generate two complex polygons and verify that GEOSDistance and GEOSDistanceIndexed
* return identical results.
*/
template<>
template<>
void object::test<2>
()
{
std::srand(12345);
geom1_ = random_polygon(-3, -8, 7, 1000);
geom2_ = random_polygon(14, 22, 6, 500);
double d_raw, d_indexed;
ensure(GEOSDistance(geom1_, geom2_, &d_raw) != 0);
ensure(GEOSDistanceIndexed(geom1_, geom2_, &d_indexed) != 0);
ensure_equals(d_indexed, d_raw);
}
// https://github.com/libgeos/geos/issues/295
template<>
template<>
void object::test<3>
()
{
geom1_ = fromWKT("MultiPolygon Z (EMPTY,((-0.14000000000000001 44.89999999999999858 0, -0.14699999999999999 44.90400000000000347 0, -0.14729999999999999 44.90500000000000114 0, -0.14000000000000001 44.89999999999999858 0)))");
geom2_ = fromWKT("POLYGON ((0 0, 1 0, 1 1, 0 0))");
double d;
int status = GEOSDistance(geom1_, geom2_, &d);
ensure_equals(status, 1);
}
// point distance does not raise floating point exception
template<>
template<>
void object::test<4>
()
{
geom1_ = fromWKT("POINT (0 0)");
geom2_ = fromWKT("POINT (1 1)");
// clear all floating point exceptions
feclearexcept (FE_ALL_EXCEPT);
double d;
int status = GEOSDistance(geom1_, geom2_, &d);
ensure_equals(status, 1);
ensure_equals(d, std::sqrt(2));
// check for floating point overflow exceptions
int raised = fetestexcept(FE_OVERFLOW);
ensure_equals(raised & FE_OVERFLOW, 0);
}
// same distance between boundables should not raise floating point exception
template<>
template<>
void object::test<5>
()
{
geom1_ = fromWKT("LINESTRING (0 0, 1 1)");
geom2_ = fromWKT("LINESTRING (2 1, 1 2)");
// clear all floating point exceptions
feclearexcept (FE_ALL_EXCEPT);
double d;
int status = GEOSDistance(geom1_, geom2_, &d);
ensure_equals(status, 1);
// ensure_equals(d, std::sqrt(2));
// check for floating point overflow exceptions
int raised = fetestexcept(FE_OVERFLOW);
ensure_equals(raised & FE_OVERFLOW, 0);
}
template<>
template<>
void object::test<6>()
{
geom1_ = fromWKT("CIRCULARSTRING (0 0, 1 1, 2 0)");
geom2_ = fromWKT("LINESTRING (1 1.0001, 2 1)");
ensure(geom1_);
ensure(geom2_);
double dist;
int ret = GEOSDistance(geom1_, geom2_, &dist);
ensure_equals("curved geometry not supported", ret, 0);
}
} // namespace tut
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