test_gradient_field.cpp

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

#include "test/test_init.h"

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

TEST_CASE("2d (gradientfield)")
{
    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)
        {
            Vector2 p((real)x / 5, (real)y / 5);

            real grad = 
                gradientField<real32, 2>()(floor(p), p - floor(p));

            image(x, y) = fromColor + grad * deltaColor;
        }
    }

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