test_noise.cpp

// Description: Testing for noise
// DocumentationOf: noise.h

#include "test/test_init.h"

#include "pastel/gfx/noise.h"
#include "pastel/gfx/image_file.h"

TEST_CASE("1d (Noise)")
{
    integer Width = 400;
    integer Height = 80;

    Array<Color, 2> image(Vector2i(Width, Height));
    Color fromColor = Color(0, 0, 0);
    Color toColor = Color(0, 0, 1);
    Color deltaColor(toColor - fromColor);

    for (integer y = 0;y < Height;++y)
    {
        for (integer x = 0;x < Width;++x)
        {
            image(x, y) = fromColor +

                perlinNoise<real>((real)x / 5) * deltaColor;
        }
    }

    savePcx(image, "perlin_noise_1d.pcx");
}

TEST_CASE("2d (Noise)")
{
    integer Width = 400;
    integer Height = 400;

    Array<Color, 2> image(Vector2i(Width, Height));
    Color fromColor = Color(0, 0, 0);
    Color toColor = Color(0, 0, 1);
    Color deltaColor(toColor - fromColor);

    for (integer y = 0;y < Height;++y)
    {
        for (integer x = 0;x < Width;++x)
        {
            image(x, y) = fromColor +
                perlinNoise(Vector2((real)x / 5,

                (real)y / 5)) * deltaColor;
        }
    }

    savePcx(image, "perlin_noise_2d.pcx");
}

TEST_CASE("3d (Noise)")
{
    integer Width = 400;
    integer Height = 400;

    Array<Color, 2> image(Vector2i(Width, Height));
    Color fromColor = Color(0, 0, 0);
    Color toColor = Color(0, 0, 1);
    Color deltaColor(toColor - fromColor);

    for (integer y = 0;y < Height;++y)
    {
        for (integer x = 0;x < Width;++x)
        {
            image(x, y) = fromColor +
                perlinNoise(Vector3((real)x / 5,

                (real)y / 5, 0)) * deltaColor;
        }
    }

    savePcx(image, "perlin_noise_3d.pcx");
}

TEST_CASE("Simplex2d (Noise)")
{
    integer Width = 512;
    integer Height = 512;

    Array<Color, 2> image(Vector2i(Width, Height));
    Color fromColor = Color(0, 0, 0);
    Color toColor = Color(0, 0, 1);
    Color deltaColor(toColor - fromColor);

    for (integer y = 0;y < Height;++y)
    {
        for (integer x = 0;x < Width;++x)
        {
            image(x, y) = fromColor +
                simplexNoise(Vector2((real)x / 30,

                (real)y / 30)) * deltaColor;
        }
    }

    savePcx(image, "simplex_noise_2d.pcx");
}

TEST_CASE("Simplex3d (Noise)")
{
    integer Width = 512;
    integer Height = 512;

    Array<Color, 2> image(Vector2i(Width, Height));
    Color fromColor = Color(0, 0, 0);
    Color toColor = Color(0, 0, 1);
    Color deltaColor(toColor - fromColor);

    for (integer y = 0;y < Height;++y)
    {
        for (integer x = 0;x < Width;++x)
        {
            image(x, y) = fromColor +

                simplexNoise(Vector3((real)x / 30, (real)y / 30, 0)) * deltaColor;
        }
    }

    savePcx(image, "simplex_noise_3d.pcx");
}