mapnik/test/unit/symbolizer/markers_point_placement.cpp

#include "catch.hpp"

#include <mapnik/vertex_adapters.hpp>
#include <mapnik/label_collision_detector.hpp>
#include <mapnik/markers_placements/point.hpp>

using namespace mapnik;

TEST_CASE("marker placement point") {

SECTION("empty geometry") {

    mapnik::geometry::line_string<double> g;
    using va_type = mapnik::geometry::line_string_vertex_adapter<double>;
    va_type va(g);

    using detector_type = mapnik::label_collision_detector4;
    detector_type detector(mapnik::box2d<double>(0, 0, 100, 100));

    using placement_type = mapnik::markers_point_placement<va_type, detector_type>;

    mapnik::markers_placement_params params {
        mapnik::box2d<double>(0, 0, 10, 10),
        agg::trans_affine(),
        0, 0, false, false, DIRECTION_AUTO, 1.0 };

    placement_type placement(va, detector, params);

    double x, y, angle;
    CHECK( !placement.get_point(x, y, angle, true) );
}

SECTION("point") {

    mapnik::geometry::point<double> g(2.0, 3.0);
    using va_type = mapnik::geometry::point_vertex_adapter<double>;
    va_type va(g);

    using detector_type = mapnik::label_collision_detector4;
    detector_type detector(mapnik::box2d<double>(0, 0, 100, 100));

    using placement_type = mapnik::markers_point_placement<va_type, detector_type>;

    mapnik::markers_placement_params params {
        mapnik::box2d<double>(0, 0, 10, 10),
        agg::trans_affine(),
        0, 0, false, false, DIRECTION_AUTO, 1.0 };

    placement_type placement(va, detector, params);

    double x, y, angle;

    CHECK( placement.get_point(x, y, angle, true) );
    CHECK( x == Approx(2.0) );
    CHECK( y == Approx(3.0) );
    CHECK( angle == Approx(0.0) );

    CHECK( !placement.get_point(x, y, angle, true) );
}

SECTION("line string") {

    mapnik::geometry::line_string<double> g;
    g.emplace_back(1.0, 1.0);
    g.emplace_back(2.0, 2.0);
    using va_type = mapnik::geometry::line_string_vertex_adapter<double>;
    va_type va(g);

    using detector_type = mapnik::label_collision_detector4;
    detector_type detector(mapnik::box2d<double>(0, 0, 100, 100));

    using placement_type = mapnik::markers_point_placement<va_type, detector_type>;

    mapnik::markers_placement_params params {
        mapnik::box2d<double>(0, 0, 10, 10),
        agg::trans_affine(),
        0, 0, false, false, DIRECTION_AUTO, 1.0 };

    placement_type placement(va, detector, params);

    double x, y, angle;

    CHECK( placement.get_point(x, y, angle, true) );
    CHECK( x == Approx(1.5) );
    CHECK( y == Approx(1.5) );
    CHECK( angle == Approx(0) );

    CHECK( !placement.get_point(x, y, angle, true) );
}

SECTION("line string zero length") {

    mapnik::geometry::line_string<double> g;
    g.emplace_back(1.0, 1.0);
    g.emplace_back(1.0, 1.0);
    using va_type = mapnik::geometry::line_string_vertex_adapter<double>;
    va_type va(g);

    using detector_type = mapnik::label_collision_detector4;
    detector_type detector(mapnik::box2d<double>(0, 0, 100, 100));

    using placement_type = mapnik::markers_point_placement<va_type, detector_type>;

    mapnik::markers_placement_params params {
        mapnik::box2d<double>(0, 0, 10, 10),
        agg::trans_affine(),
        0, 0, false, false, DIRECTION_AUTO, 1.0 };

    placement_type placement(va, detector, params);

    double x, y, angle;

    CHECK( placement.get_point(x, y, angle, true) );
    CHECK( x == Approx(1.0) );
    CHECK( y == Approx(1.0) );
    CHECK( angle == Approx(0) );

    CHECK( !placement.get_point(x, y, angle, true) );
}

}