82 lines
2.7 KiB
C++
82 lines
2.7 KiB
C++
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#include "catch.hpp"
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#include <iostream>
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#include <vector>
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#include <string>
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#include <algorithm>
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#include <mapnik/layer.hpp>
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#include <mapnik/wkt/wkt_factory.hpp>
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#include <mapnik/wkt/wkt_generator_grammar.hpp>
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#include <mapnik/simplify.hpp>
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#include <mapnik/simplify_converter.hpp>
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// stl
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#include <stdexcept>
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// Convenience method for test cases
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void simplify(std::string const& wkt_in, double tolerance, std::string const& method, std::string const& expected)
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{
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#if 0 // FIXME
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//grab the geom
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mapnik::geometry_container multi_input;
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if (!mapnik::from_wkt(wkt_in , multi_input))
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{
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throw std::runtime_error("Failed to parse WKT");
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}
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//setup the generalization
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mapnik::vertex_adapter va(multi_input.front());
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mapnik::simplify_converter<mapnik::vertex_adapter> generalizer(va);
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generalizer.set_simplify_algorithm(mapnik::simplify_algorithm_from_string(method).get());
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generalizer.set_simplify_tolerance(tolerance);
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//suck the vertices back out of it
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mapnik::geometry_type* output = new mapnik::geometry_type(multi_input.front().type());
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mapnik::CommandType cmd;
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double x, y;
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while ((cmd = (mapnik::CommandType)generalizer.vertex(&x, &y)) != mapnik::SEG_END)
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{
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output->push_vertex(x, y, cmd);
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}
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//construct the answer
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mapnik::geometry_container multi_out;
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multi_out.push_back(output);
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std::string wkt_out;
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REQUIRE(mapnik::to_wkt(multi_out, wkt_out));
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REQUIRE(wkt_out == expected);
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#endif
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}
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TEST_CASE("converters") {
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SECTION("simplify") {
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simplify( std::string("LineString(0 0,2 2,3 5,4 1,5 0,6 7,7 0)"),
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4, "douglas-peucker",
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std::string("LineString(0 0,6 7,7 0)"));
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simplify( std::string("LineString(0 0,2 2,3 5,4 1,5 0,6 7,7 0)"),
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2, "douglas-peucker",
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std::string("LineString(0 0,3 5,5 0,6 7,7 0)"));
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simplify( std::string("LineString(10 0,9 -4,7 -7,4 -9,0 -10,-4 -9,-7 -7,-9 -4,-10 0,-9 4,-7 7,-4 9,0 10,4 9,7 7,9 4)"),
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4, "douglas-peucker",
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std::string("LineString(10 0,0 -10,-10 0,0 10,9 4)"));
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simplify( std::string("LineString(0 0,1 1,2 2,0 10,0 0)"),
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10, "douglas-peucker",
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std::string("LineString(0 0,0 0)"));
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simplify( std::string("LineString(0 0,1 1,2 2,0 10,0 0)"),
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8, "douglas-peucker",
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std::string("LineString(0 0,0 10,0 0)"));
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simplify( std::string("LineString(0 0,1 1,2 2,0 10,0 0)"),
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1, "douglas-peucker",
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std::string("LineString(0 0,2 2,0 10,0 0)"));
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simplify( std::string("LineString(0 0, 1 -1, 2 2, 0 -10, 0 0, -5 7, 4 6)"),
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3, "douglas-peucker",
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std::string("LineString(0 0,0 -10,-5 7,4 6)"));
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}
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}
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