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//
// Test Suite for capi::GEOSGeom_setPrecision
#include "capi_test_utils.h"
namespace tut {
//
// Test Group
//
// Common code used in test cases.
struct test_capigeosgeomsetprecision_data : public capitest::utility {
void
checkPrecision(const char* wktInput, double gridSize, const char* wktExpected)
{
GEOSGeometry* input = fromWKT(wktInput);
GEOSGeometry* result = GEOSGeom_setPrecision(input, gridSize, 0);
ensure(result != nullptr);
ensure_geometry_equals(result, wktExpected);
GEOSGeom_destroy(input);
GEOSGeom_destroy(result);
}
};
typedef test_group<test_capigeosgeomsetprecision_data> group;
typedef group::object object;
group test_capigeosgeomsetprecision_group("capi::GEOSGeom_setPrecision");
//
// Test Cases
//
template<>
template<>
void object::test<1>
()
{
geom1_ = fromWKT("POLYGON EMPTY");
ensure_equals(GEOSGeom_getPrecision(geom1_), 0.0);
geom3_ = GEOSGeom_setPrecision(geom1_, 2.0, 0);
ensure(geom3_ != 0);
ensure_geometry_equals(geom3_, "POLYGON EMPTY");
ensure_equals(GEOSGeom_getPrecision(geom3_), 2.0);
}
template<>
template<>
void object::test<2>
()
{
checkPrecision("LINESTRING(-3 6, 9 1)",
2.0,
"LINESTRING (-2 6, 10 2)");
}
// See effects of precision reduction on intersection operation
template<>
template<>
void object::test<3>
()
{
geom1_ = fromWKT("LINESTRING(2 10, 4 30)");
geom2_ = fromWKT("LINESTRING(4 10, 2 30)");
geom3_ = GEOSIntersection(geom1_, geom2_);
ensure(geom3_ != 0);
ensure_geometry_equals(geom3_, "POINT (3 20)");
GEOSGeometry* g;
// Both inputs with precision grid of 2.0
g = GEOSGeom_setPrecision(geom1_, 2.0, 0);
ensure(g != 0);
GEOSGeom_destroy(geom1_);
geom1_ = g;
g = GEOSGeom_setPrecision(geom2_, 2.0, 0);
ensure(g != 0);
GEOSGeom_destroy(geom2_);
geom2_ = g;
GEOSGeom_destroy(geom3_);
geom3_ = GEOSIntersection(geom1_, geom2_);
ensure(geom3_ != 0);
ensure_geometry_equals(geom3_, "POINT (4 20)");
// One input with precision grid of 0.5, the other of 2.0
g = GEOSGeom_setPrecision(geom1_, 0.5, 0);
ensure(g != 0);
GEOSGeom_destroy(geom1_);
geom1_ = g;
GEOSGeom_destroy(geom3_);
geom3_ = GEOSIntersection(geom1_, geom2_);
ensure(geom3_ != 0);
ensure_geometry_equals(geom3_, "POINT (3 20)");
ensure_equals(GEOSGeom_getPrecision(geom1_), 0.5);
ensure_equals(GEOSGeom_getPrecision(geom2_), 2.0);
}
// Retain (or not) topology
template<>
template<>
void object::test<4>
()
{
geom1_ = fromWKT("POLYGON((10 10,20 10,16 15,20 20, 10 20, 14 15, 10 10))");
geom2_ = GEOSGeom_setPrecision(geom1_, 5.0, 0);
ensure_geometry_equals(geom2_,
"MULTIPOLYGON (((10 10, 15 15, 20 10, 10 10)), ((15 15, 10 20, 20 20, 15 15)))");
geom3_ = GEOSGeom_setPrecision(geom1_, 5.0, GEOS_PREC_NO_TOPO);
ensure_geometry_equals(geom3_,
"POLYGON ((10 10, 20 10, 15 15, 20 20, 10 20, 15 15, 10 10))");
}
// Retain (or not) collapsed elements
template<>
template<>
void object::test<5>
()
{
geom1_ = fromWKT("LINESTRING(1 0, 2 0)");
geom2_ = GEOSGeom_setPrecision(geom1_, 5.0, 0);
ensure_geometry_equals(geom2_, "LINESTRING EMPTY");
geom3_ = GEOSGeom_setPrecision(geom1_, 5.0, GEOS_PREC_KEEP_COLLAPSED);
ensure_equals(toWKT(geom3_), "LINESTRING (0 0, 0 0)");
}
// Retain (or not) collapsed elements
template<>
template<>
void object::test<6> ()
{
checkPrecision("LINESTRING (0 0, 0.1 0.1)",
1.0,
"LINESTRING EMPTY");
}
// Retain (or not) collapsed elements
template<>
template<>
void object::test<7> ()
{
geom1_ = fromWKT("LINESTRING (0 0, 0.1 0.1)");
geom2_ = GEOSGeom_setPrecision(geom1_, 1.0, GEOS_PREC_NO_TOPO);
ensure_geometry_equals(geom2_, "LINESTRING (0 0, 0 0)");
}
// Retain (or not) collapsed elements
template<>
template<>
void object::test<8> ()
{
geom1_ = fromWKT("LINESTRING (0 0, 0.1 0.1)");
geom2_ = GEOSGeom_setPrecision(geom1_, 1.0, GEOS_PREC_KEEP_COLLAPSED);
ensure_geometry_equals(geom2_, "LINESTRING (0 0, 0 0)");
}
// Retain (or not) collapsed elements
template<>
template<>
void object::test<9> ()
{
geom1_ = fromWKT("LINESTRING (0 0, 0.1 0.1)");
geom2_ = GEOSGeom_setPrecision(geom1_, 1.0, GEOS_PREC_KEEP_COLLAPSED | GEOS_PREC_NO_TOPO);
ensure_geometry_equals(geom2_, "LINESTRING (0 0, 0 0)");
}
// Collapse a linearRing / Trac #1135
template<>
template<>
void object::test<10> ()
{
checkPrecision("LINEARRING (0 0, 0.1 0, 0.1 0.1, 0 0.1, 0 0)",
1.0,
"LINEARRING EMPTY");
}
// Reduce polygon precision, corner case / Trac #1127
template<>
template<>
void object::test<11> ()
{
checkPrecision("POLYGON((100 49.5, 100 300, 320 60, 340 49.9, 360 50.1, 380 49.5, 100 49.5))",
100.0,
"POLYGON ((100 300, 300 100, 300 0, 100 0, 100 300))");
}
template<>
template<>
void object::test<12>()
{
checkPrecision("POLYGON ((0 0, 0.1 0, 0.1 0.1, 0 0.1, 0 0))",
1.0,
"POLYGON EMPTY");
}
//-- test that a large gridsize works
template<>
template<>
void object::test<13>()
{
checkPrecision("LINESTRING (657035.913 6475590.114,657075.57 6475500)",
100,
"LINESTRING (657000 6475600, 657100 6475500)");
}
// Test more exact rounding for integral scale factors
// see https://trac.osgeo.org/postgis/ticket/5520
template<>
template<>
void object::test<14>()
{
checkPrecision("LINESTRING (657035.913 6475590.114,657075.57 6475500)",
0.001,
"LINESTRING (657035.913 6475590.114, 657075.57 6475500)");
}
// see https://trac.osgeo.org/postgis/ticket/5425
template<>
template<>
void object::test<15>()
{
checkPrecision("LINESTRING(674169.89 198051.38,674197.7 198065.55,674200.36 198052.38)",
0.001,
"LINESTRING (674169.89 198051.38, 674197.7 198065.55, 674200.36 198052.38)");
}
// see https://trac.osgeo.org/postgis/ticket/3929
template<>
template<>
void object::test<16>()
{
checkPrecision("POINT(311.4 0)",
0.1,
"POINT(311.4 0)");
}
// see https://gis.stackexchange.com/questions/465485/postgis-reduce-precision-in-linestring
template<>
template<>
void object::test<17>()
{
checkPrecision("LINESTRING (16.418792399944802 54.24801559999939, 16.4176588 54.248003)",
0.0000001,
"LINESTRING (16.4187924 54.2480156, 16.4176588 54.248003)");
}
// see https://gis.stackexchange.com/questions/321814/st-snaptogrid-doesnt-work-properly-e-g-41-94186153740355-41-94186149999999
template<>
template<>
void object::test<18>()
{
checkPrecision("POINT (21.619820510769063 41.94186153740355)",
0.0000001,
"POINT (21.6198205 41.9418615)");
}
// see https://gis.stackexchange.com/questions/321814/st-snaptogrid-doesnt-work-properly-e-g-41-94186153740355-41-94186149999999
template<>
template<>
void object::test<19>()
{
checkPrecision("POINT (22.49594094391644 41.20357506925623)",
0.0000001,
"POINT (22.4959409 41.2035751)");
}
// see https://lists.osgeo.org/pipermail/postgis-users/2006-January/010861.html
template<>
template<>
void object::test<20>()
{
geom1_ = fromWKT("POINT(1.23456789 9.87654321)");
geom2_ = GEOSGeom_setPrecision(geom1_, .000001, 0);
geom3_ = GEOSGeom_setPrecision(geom2_, .001, 0);
ensure_geometry_equals(geom3_,
"POINT(1.235 9.877)");
}
// see https://lists.osgeo.org/pipermail/postgis-users/2023-September/046107.html
template<>
template<>
void object::test<21>()
{
checkPrecision("LINESTRING(334729.13 4103548.88, 334729.12 4103548.53)",
0.001,
"LINESTRING(334729.13 4103548.88,334729.12 4103548.53)");
}
// Test multiple grid sizes
template<>
template<>
void object::test<22>()
{
const char* wkt = "LINESTRING(674169.89 198051.619820510769063, 674197.71234 1448065.55674200)";
checkPrecision(wkt, 0.1, "LINESTRING (674169.9 198051.6, 674197.7 1448065.6 )");
checkPrecision(wkt, 0.01, "LINESTRING (674169.89 198051.62, 674197.71 1448065.56 )");
checkPrecision(wkt, 0.001, "LINESTRING (674169.89 198051.62, 674197.712 1448065.557 )");
checkPrecision(wkt, 0.0001, "LINESTRING (674169.89 198051.6198, 674197.7123 1448065.5567 )");
checkPrecision(wkt, 0.00001, "LINESTRING (674169.89 198051.61982, 674197.71234 1448065.55674 )");
checkPrecision(wkt, 0.000001, "LINESTRING (674169.89 198051.619821, 674197.71234 1448065.556742 )");
checkPrecision(wkt, 0.0000001, "LINESTRING (674169.89 198051.6198205, 674197.71234 1448065.556742 )");
checkPrecision(wkt, 1, "LINESTRING ( 674170 198052, 674198 1448066)");
checkPrecision(wkt, 10, "LINESTRING ( 674170 198050, 674200 1448070)");
checkPrecision(wkt, 100, "LINESTRING ( 674200 198100, 674200 1448100)");
checkPrecision(wkt, 1000, "LINESTRING ( 674000 198000, 674000 1448000)");
checkPrecision(wkt, 10000, "LINESTRING ( 670000 200000, 670000 1450000)");
checkPrecision(wkt, 100000, "LINESTRING ( 700000 200000, 700000 1400000)");
checkPrecision(wkt, 1000000, "LINESTRING (1000000 0, 1000000 1000000)");
}
// This case with a large scale factor produced inexact rounding before code update
template<>
template<>
void object::test<23>()
{
const char* wkt = "LINESTRING(674169.89 198051.619820510769063, 674197.71234 1448065.55674200)";
checkPrecision(wkt, 100000, "LINESTRING ( 700000 200000, 700000 1400000)");
}
} // namespace tut
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