test_poisson_disk_pattern.cpp

// Description: Testing for poisson-disk pattern
// DocumentationOf: poisson_disk_pattern.h

#include "test/test_init.h"

#include "pastel/geometry/pointkdtree/pointkdtree.h"
#include "pastel/geometry/distance/distance_point_point.h"
#include "pastel/geometry/poisson_disk_pattern.h"

#include "pastel/gfx/image_file/pcx/savepcx.h"
#include "pastel/gfx/drawing.h"
#include "pastel/gfx/image_gfxrenderer.h"
#include "pastel/gfx/gfxrenderer_tools.h"
#include "pastel/gfx/color/color_space.h"

#include "pastel/sys/random.h"
#include "pastel/sys/view/arrayview.h"
#include "pastel/sys/view/view_tools.h"
#include "pastel/sys/view.h"

#include "pastel/sys/vector/vector_tools.h"

namespace
{

    class PoissonDiskOutput
    {
    public:
        explicit PoissonDiskOutput(Array<Color, 2>& data)
            : data_(data)
        {
        }

        void operator()(const Vector1& point) const
        {
            clear(Color(1), rowView(arrayView(data_), 1, Vector<integer, 2>(point[0], 0)));
        }

        void operator()(const Vector2& point) const
        {
            drawPixel(point, Color(1), arrayView(data_));
        }

        void operator()(const Vector3& point) const
        {
            drawPixel(shrink(point), Color(1 - (point.z() / 500)), arrayView(data_));
        }

        void operator()(const Vector4& point) const
        {
            drawPixel(shrink(shrink(point)), hsvToRgb(Color(point.w() / 100,
                1, 1 - (point.z() / 500))), arrayView(data_));
        }

    private:
        Array<Color, 2>& data_;
    };

}

TEST_CASE("PoissonDiskPattern (PointPattern)")
{
    integer width = 500;
    integer height = 500;

    Array<Color, 2> image;

    PoissonDiskOutput poissonDiskOutput(image);

    image.setExtent(Vector2i(width, 100), Color(0));
    clear(Color(0), arrayView(image));

    poissonDiskPattern(
        AlignedBox1(0, width),
        5, poissonDiskOutput);

    savePcx(image, "testpointpattern_poissondisk_1d.pcx");

    image.setExtent(Vector2i(width, height), Color(0));
    clear(Color(0), arrayView(image));

    poissonDiskPattern(
        AlignedBox2(Vector2(0), Vector2(width, height)),
        5, poissonDiskOutput);

    savePcx(image, "testpointpattern_poissondisk_2d.pcx");

    clear(Color(0), arrayView(image));

    poissonDiskPattern(
        AlignedBox3(Vector3(0), Vector3(width, height, 500)),
        35, poissonDiskOutput);

    savePcx(image, "testpointpattern_poissondisk_3d.pcx");

    clear(Color(0), arrayView(image));

    poissonDiskPattern(
        AlignedBox4(Vector4(0), Vector4(width, height, 500, 500)),
        70, poissonDiskOutput);

    savePcx(image, "testpointpattern_poissondisk_4d.pcx");
}