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[buffer] support degenerate linestrings containing one point. In that

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case point-buffer is applied. Including updated unit tests
This commit is contained in:
Barend Gehrels
2014-10-24 11:21:32 +02:00
parent f5ce90c9a6
commit e4cd46ac5d
3 changed files with 57 additions and 10 deletions
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14
test/algorithms/buffer/linestring_buffer.cpp
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@@ -27,6 +27,10 @@ static std::string const overlapping = "LINESTRING(0 0,4 5,7 4,10 6, 10 2,2 2)";
static std::string const curve = "LINESTRING(2 7,3 5,5 4,7 5,8 7)";
static std::string const tripod = "LINESTRING(5 0,5 5,1 8,5 5,9 8)"; // with spike
static std::string const degenerate1 = "LINESTRING(5 5)";
static std::string const degenerate2 = "LINESTRING(5 5,5 5)";
static std::string const degenerate3 = "LINESTRING(5 5,5 5,5 5)";
static std::string const for_collinear = "LINESTRING(2 0,0 0,0 4,6 4,6 0,4 0)";
static std::string const for_collinear2 = "LINESTRING(2 1,2 0,0 0,0 4,6 4,6 0,4 0,4 1)";
@@ -133,6 +137,16 @@ void test_all()
test_one<linestring, polygon>("field_sprayer1", field_sprayer1, join_round, end_round, 718.761877, 16.5, 6.5);
test_one<linestring, polygon>("field_sprayer1", field_sprayer1, join_miter, end_round, 718.939628, 16.5, 6.5);
test_one<linestring, polygon>("degenerate1", degenerate1, join_round, end_round, 28.25, 3.0);
#if defined(BOOST_GEOMETRY_BUFFER_INCLUDE_FAILING_TESTS)
test_one<linestring, polygon>("degenerate2", degenerate2, join_miter, end_flat, 99.99, 3.0);
test_one<linestring, polygon>("degenerate2", degenerate2, join_round, end_round, 99.99, 3.0);
test_one<linestring, polygon>("degenerate3", degenerate3, join_miter, end_flat, 99.99, 3.0);
test_one<linestring, polygon>("degenerate3", degenerate3, join_round, end_round, 99.99, 3.0);
#endif
double tolerance = 1.0e-10;
test_one<linestring, polygon>("aimes120", aimes120, join_miter, end_flat, 1.62669948622351512e-08, 0.000018, 0.000018, false, tolerance);

10
test/algorithms/buffer/multi_linestring_buffer.cpp
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@@ -15,6 +15,11 @@ static std::string const simplex = "MULTILINESTRING((0 0,4 5),(5 4,10 0))";
static std::string const two_bends = "MULTILINESTRING((0 0,4 5,7 4,10 6),(1 5,5 9,8 6))";
static std::string const turn_inside = "MULTILINESTRING((0 0,4 5,7 4,10 6),(1 5,5 9,8 6),(0 4,-2 6))";
static std::string const degenerate0 = "MULTILINESTRING()";
static std::string const degenerate1 = "MULTILINESTRING((5 5))";
static std::string const degenerate2 = "MULTILINESTRING((5 5),(9 9))";
static std::string const degenerate3 = "MULTILINESTRING((5 5),(9 9),(4 10))";
template <typename P>
void test_all()
@@ -49,6 +54,11 @@ void test_all()
test_one<multi_linestring_type, polygon>("two_bends", two_bends, join_round_by_divide, end_flat, 64.6217, 1.5, 1.5);
test_one<multi_linestring_type, polygon>("two_bends", two_bends, join_miter, end_flat, 65.1834, 1.5, 1.5);
test_one<multi_linestring_type, polygon>("two_bends", two_bends, join_miter, end_round, 75.2917, 1.5, 1.5);
test_one<multi_linestring_type, polygon>("degenerate0", degenerate0, join_round, end_round, 0.0, 3.0, 3.0);
test_one<multi_linestring_type, polygon>("degenerate1", degenerate1, join_round, end_round, 28.2503, 3.0, 3.0);
test_one<multi_linestring_type, polygon>("degenerate2", degenerate2, join_round, end_round, 56.0457, 3.0, 3.0);
test_one<multi_linestring_type, polygon>("degenerate3", degenerate3, join_round, end_round, 80.4531, 3.0, 3.0);
}