Source/Tests/Math/PerlinNoise.cpp - master - Metallist64/rbfx

Source/Tests/Math/PerlinNoise.cpp
71 строка2 KB
gleblebedev
1D perlin noise and camera shake component (#589)
24 июл 2023, 22:39
24 июл 2023, 22:392bb990d
//
// Copyright (c) 2023-2023 the rbfx project.
//
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// furnished to do so, subject to the following conditions:
//
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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#include "../CommonUtils.h"

#include <Urho3D/Math/PerlinNoise.h>

using namespace Urho3D;

TEST_CASE("Perlin noise 1D")
{
    double max = ea::numeric_limits<double>::min();
    double min = ea::numeric_limits<double>::max();

    RandomEngine randomEngine{0};
    const PerlinNoise noise{randomEngine};

    for (unsigned i = 0; i < 1024; ++i)
    {
        const double val = noise.GetDouble(i * 1.1);
        min = Min(min, val);
        max = Max(max, val);
    }

    CHECK(min >= 0.0);
    CHECK(max <= 1.0);
}

TEST_CASE("Perlin noise 3D")
{
    double max = ea::numeric_limits<double>::min();
    double min = ea::numeric_limits<double>::max();

    RandomEngine randomEngine{0};
    const PerlinNoise noise{randomEngine};

    for (unsigned x = 0; x < 100; ++x)
    {
        for (unsigned y = 0; y < 100; ++y)
        {
            for (unsigned z = 0; z < 100; ++z)
            {
                const double val = noise.GetDouble(x * 1.1, y * 1.1, z * 1.1);
                min = Min(min, val);
                max = Max(max, val);
            }
        }
    }

    CHECK(min >= 0.0);
    CHECK(max <= 1.0);
}