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Fixed geometry::equals for high precision - testcase

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(in this fix also the case that very first point is redundant is fixed)

[SVN r72030]
This commit is contained in:
Barend Gehrels 2011-05-18 18:09:20 +00:00
parent f79ce43c81
commit 2034b3afb7
1 changed files with 53 additions and 4 deletions
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57
test/algorithms/equals.cpp
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@ -21,15 +21,13 @@ void test_all()
typedef bg::model::polygon<P> polygon;
typedef bg::model::linestring<P> linestring;
std::string case_p1 = "POLYGON((0 0,0 2,2 2,0 0))";
test_geometry<P, P>("p1", "POINT(1 1)", "POINT(1 1)", true);
test_geometry<P, P>("p2", "POINT(1 1)", "POINT(1 2)", false);
test_geometry<box, box>("b1", "BOX(1 1,2 2)", "BOX(1 2,2 2)", false);
test_geometry<box, box>("b1", "BOX(1 2,3 4)", "BOX(1 2,3 4)", true);
std::string case_p1 = "POLYGON((0 0,0 2,2 2,0 0))";
// Completely equal
test_geometry<ring, ring>("poly_eq", case_p1, case_p1, true);
@ -39,7 +37,14 @@ void test_all()
// Extra coordinate
test_geometry<ring, ring>("poly_extra", case_p1, "POLYGON((0 0,0 2,2 2,1 1,0 0))", true);
// Degenerate points
// Shifted + extra (redundant) coordinate
test_geometry<ring, ring>("poly_shifted_extra1", "POLYGON((2 2,1 1,0 0,0 2,2 2))", case_p1, true);
// Shifted + extra (redundant) coordinate being first/last point
test_geometry<ring, ring>("poly_shifted_extra2", "POLYGON((1 1,0 0,0 2,2 2,1 1))", case_p1, true);
// Degenerate (duplicate) points
test_geometry<ring, ring>("poly_degenerate", "POLYGON((0 0,0 2,2 2,2 2,0 0))", "POLYGON((0 0,0 2,0 2,2 2,0 0))", true);
// Two different bends, same area, unequal
@ -96,10 +101,54 @@ void test_all()
}
template <typename T>
void verify()
{
T dxn1, dyn1, dxn2, dyn2;
{
T x1 = "0", y1 = "0", x2 = "3", y2 = "3";
T dx = x2 - x1, dy = y2 - y1;
T mag = sqrt(dx * dx + dy * dy);
dxn1 = dx / mag;
dyn1 = dy / mag;
}
{
T x1 = "0", y1 = "0", x2 = "1", y2 = "1";
T dx = x2 - x1, dy = y2 - y1;
T mag = sqrt(dx * dx + dy * dy);
dxn2 = dx / mag;
dyn2 = dy / mag;
}
if (dxn1 == dxn2 && dyn1 == dyn2)
{
//std::cout << "vectors are equal, using ==" << std::endl;
}
if (boost::geometry::math::equals(dxn1, dxn2)
&& boost::geometry::math::equals(dyn1, dyn2))
{
//std::cout << "vectors are equal, using bg::math::equals" << std::endl;
}
bool equals = boost::geometry::math::equals_with_epsilon(dxn1, dxn2)
&& boost::geometry::math::equals_with_epsilon(dyn1, dyn2);
if (equals)
{
//std::cout << "vectors are equal, using bg::math::equals_with_epsilon" << std::endl;
}
BOOST_CHECK_EQUAL(equals, true);
}
int test_main( int , char* [] )
{
//verify<double>();
verify<ttmath_big>();
test_all<bg::model::d2::point_xy<int> >();
test_all<bg::model::d2::point_xy<double> >();