152 lines
4.7 KiB
C++
152 lines
4.7 KiB
C++
#include "catch.hpp"
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#include <mapnik/geometry.hpp>
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#include <mapnik/geometry_envelope.hpp>
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namespace {
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template <typename T>
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void envelope_test()
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{
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using namespace mapnik::geometry;
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using coord_type = T;
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{
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geometry<coord_type> geom(point<coord_type>(1,2));
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mapnik::box2d<coord_type> bbox = mapnik::geometry::envelope(geom);
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REQUIRE( bbox.minx() == 1 );
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REQUIRE( bbox.miny() == 2 );
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REQUIRE( bbox.maxx() == 1 );
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REQUIRE( bbox.maxy() == 2 );
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}
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{
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// Test empty geom
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geometry<coord_type> geom = mapnik::geometry::geometry_empty();
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mapnik::box2d<coord_type> bbox = mapnik::geometry::envelope(geom);
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REQUIRE_FALSE( bbox.valid() );
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}
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{
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line_string<coord_type> line;
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line.add_coord(0,0);
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line.add_coord(1,1);
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line.add_coord(2,2);
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geometry<coord_type> geom(line);
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mapnik::box2d<coord_type> bbox = mapnik::geometry::envelope(geom);
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REQUIRE( bbox.minx() == 0 );
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REQUIRE( bbox.miny() == 0 );
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REQUIRE( bbox.maxx() == 2 );
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REQUIRE( bbox.maxy() == 2 );
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}
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{
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line_string<coord_type> line;
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line.add_coord(0,0);
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line.add_coord(1,1);
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line.add_coord(2,2);
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line_string<coord_type> line2;
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line2.add_coord(0,0);
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line2.add_coord(-1,-1);
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line2.add_coord(-2,-2);
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multi_line_string<coord_type> multi_line;
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multi_line.emplace_back(std::move(line));
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multi_line.emplace_back(std::move(line2));
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geometry<coord_type> geom(multi_line);
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mapnik::box2d<coord_type> bbox = mapnik::geometry::envelope(geom);
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REQUIRE( bbox.minx() == -2 );
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REQUIRE( bbox.miny() == -2 );
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REQUIRE( bbox.maxx() == 2 );
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REQUIRE( bbox.maxy() == 2 );
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}
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{
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polygon<coord_type> poly;
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linear_ring<coord_type> ring;
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ring.add_coord(0,0);
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ring.add_coord(-10,0);
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ring.add_coord(-10,10);
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ring.add_coord(0,10);
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ring.add_coord(0,0);
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poly.set_exterior_ring(std::move(ring));
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geometry<coord_type> geom(poly);
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mapnik::box2d<coord_type> bbox = mapnik::geometry::envelope(geom);
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REQUIRE( bbox.minx() == -10 );
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REQUIRE( bbox.miny() == 0 );
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REQUIRE( bbox.maxx() == 0 );
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REQUIRE( bbox.maxy() == 10 );
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multi_polygon<coord_type> mp;
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mp.push_back(poly);
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geometry<coord_type> geom_mp(mp);
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bbox = mapnik::geometry::envelope(geom_mp);
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REQUIRE( bbox.minx() == -10 );
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REQUIRE( bbox.miny() == 0 );
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REQUIRE( bbox.maxx() == 0 );
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REQUIRE( bbox.maxy() == 10 );
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geometry_collection<coord_type> gc;
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bbox = mapnik::geometry::envelope(gc);
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REQUIRE_FALSE( bbox.valid() );
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gc.push_back(geom_mp);
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bbox = mapnik::geometry::envelope(gc);
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REQUIRE( bbox.minx() == -10 );
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REQUIRE( bbox.miny() == 0 );
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REQUIRE( bbox.maxx() == 0 );
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REQUIRE( bbox.maxy() == 10 );
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gc.emplace_back(point<coord_type>(-50,-50));
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bbox = mapnik::geometry::envelope(gc);
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REQUIRE( bbox.minx() == -50 );
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REQUIRE( bbox.miny() == -50 );
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REQUIRE( bbox.maxx() == 0 );
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REQUIRE( bbox.maxy() == 10 );
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}
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{
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// polygon with hole
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polygon<coord_type> poly;
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linear_ring<coord_type> ring;
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ring.add_coord(0,0);
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ring.add_coord(-10,0);
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ring.add_coord(-10,10);
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ring.add_coord(0,10);
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ring.add_coord(0,0);
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poly.set_exterior_ring(std::move(ring));
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linear_ring<coord_type> hole;
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hole.add_coord(-7,7);
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hole.add_coord(-7,3);
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hole.add_coord(-3,3);
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hole.add_coord(-3,7);
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hole.add_coord(-7,7);
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poly.add_hole(std::move(hole));
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geometry<coord_type> geom(poly);
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mapnik::box2d<coord_type> bbox = mapnik::geometry::envelope(poly);
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REQUIRE( bbox.minx() == -10 );
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REQUIRE( bbox.miny() == 0 );
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REQUIRE( bbox.maxx() == 0 );
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REQUIRE( bbox.maxy() == 10 );
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// add another hole inside the first hole
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// which should be considered a hit
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linear_ring<coord_type> fill;
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fill.add_coord(-6,4);
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fill.add_coord(-6,6);
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fill.add_coord(-4,6);
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fill.add_coord(-4,4);
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fill.add_coord(-6,4);
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poly.add_hole(std::move(fill));
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bbox = mapnik::geometry::envelope(poly);
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REQUIRE( bbox.minx() == -10 );
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REQUIRE( bbox.miny() == 0 );
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REQUIRE( bbox.maxx() == 0 );
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REQUIRE( bbox.maxy() == 10 );
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}
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}
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}
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TEST_CASE("geometry ops - envelope") {
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SECTION("envelope_test")
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{
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envelope_test<int>();
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envelope_test<double>();
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envelope_test<float>();
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}
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}
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