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/*
Minetest
Copyright (C) 2010-2014 kwolekr, Ryan Kwolek <kwolekr@minetest.net>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "test.h"
#include <cmath>
#include "exceptions.h"
#include "noise.h"
class TestNoise : public TestBase {
public:
TestNoise() { TestManager::registerTestModule(this); }
const char *getName() { return "TestNoise"; }
void runTests(IGameDef *gamedef);
void testNoise2dAtOriginWithZeroSeed();
void testNoise2dWithMaxSeed();
void testNoise2dWithFunPrimes();
void testNoise2dPoint();
void testNoise2dBulk();
void testNoise3dAtOriginWithZeroSeed();
void testNoise3dWithMaxSeed();
void testNoise3dWithFunPrimes();
void testNoise3dPoint();
void testNoise3dBulk();
void testNoiseInvalidParams();
static const float expected_2d_results[10 * 10];
static const float expected_3d_results[10 * 10 * 10];
};
static TestNoise g_test_instance;
void TestNoise::runTests(IGameDef *gamedef)
{
TEST(testNoise2dAtOriginWithZeroSeed);
TEST(testNoise2dWithMaxSeed);
TEST(testNoise2dWithFunPrimes);
TEST(testNoise2dPoint);
TEST(testNoise2dBulk);
TEST(testNoise3dAtOriginWithZeroSeed);
TEST(testNoise3dWithMaxSeed);
TEST(testNoise3dWithFunPrimes);
TEST(testNoise3dPoint);
TEST(testNoise3dBulk);
TEST(testNoiseInvalidParams);
}
////////////////////////////////////////////////////////////////////////////////
void TestNoise::testNoise2dAtOriginWithZeroSeed()
{
float actual{ noise2d(0, 0, 0) };
constexpr float expected{ -0.281791f };
UASSERT(std::fabs(actual - expected) <= 0.00001);
}
void TestNoise::testNoise2dWithMaxSeed()
{
float actual{ noise2d(4096, 4096, 2147483647) };
constexpr float expected{ 0.950606f };
UASSERT(std::fabs(actual - expected) <= 0.00001);
}
void TestNoise::testNoise2dWithFunPrimes()
{
float actual{ noise2d(-3947, -2333, 7027) };
constexpr float expected{ -0.294907f };
UASSERT(std::fabs(actual - expected) <= 0.00001);
}
void TestNoise::testNoise2dPoint()
{
NoiseParams np_normal(20, 40, v3f(50, 50, 50), 9, 5, 0.6, 2.0);
u32 i = 0;
for (u32 y = 0; y != 10; y++)
for (u32 x = 0; x != 10; x++, i++) {
float actual = NoisePerlin2D(&np_normal, x, y, 1337);
float expected = expected_2d_results[i];
UASSERT(std::fabs(actual - expected) <= 0.00001);
}
}
void TestNoise::testNoise2dBulk()
{
NoiseParams np_normal(20, 40, v3f(50, 50, 50), 9, 5, 0.6, 2.0);
Noise noise_normal_2d(&np_normal, 1337, 10, 10);
float *noisevals = noise_normal_2d.perlinMap2D(0, 0, NULL);
for (u32 i = 0; i != 10 * 10; i++) {
float actual = noisevals[i];
float expected = expected_2d_results[i];
UASSERT(std::fabs(actual - expected) <= 0.00001);
}
}
void TestNoise::testNoise3dAtOriginWithZeroSeed()
{
float actual{ noise2d(0, 0, 0) };
constexpr float expected{ -0.281791f };
UASSERT(std::fabs(actual - expected) <= 0.00001);
}
void TestNoise::testNoise3dWithMaxSeed()
{
float actual{ noise3d(4096, 4096, 4096, 2147483647) };
constexpr float expected{ -0.775243f };
UASSERT(std::fabs(actual - expected) <= 0.00001);
}
void TestNoise::testNoise3dWithFunPrimes()
{
float actual{ noise2d(3903, -1723, 7411) };
constexpr float expected{ 0.989124f };
UASSERT(std::fabs(actual - expected) <= 0.00001);
}
void TestNoise::testNoise3dPoint()
{
NoiseParams np_normal(20, 40, v3f(50, 50, 50), 9, 5, 0.6, 2.0);
u32 i = 0;
for (u32 z = 0; z != 10; z++)
for (u32 y = 0; y != 10; y++)
for (u32 x = 0; x != 10; x++, i++) {
float actual = NoisePerlin3D(&np_normal, x, y, z, 1337);
float expected = expected_3d_results[i];
UASSERT(std::fabs(actual - expected) <= 0.00001);
}
}
void TestNoise::testNoise3dBulk()
{
NoiseParams np_normal(20, 40, v3f(50, 50, 50), 9, 5, 0.6, 2.0);
Noise noise_normal_3d(&np_normal, 1337, 10, 10, 10);
float *noisevals = noise_normal_3d.perlinMap3D(0, 0, 0, NULL);
for (u32 i = 0; i != 10 * 10 * 10; i++) {
float actual = noisevals[i];
float expected = expected_3d_results[i];
UASSERT(std::fabs(actual - expected) <= 0.00001);
}
}
void TestNoise::testNoiseInvalidParams()
{
bool exception_thrown = false;
try {
NoiseParams np_highmem(4, 70, v3f(1, 1, 1), 5, 60, 0.7, 10.0);
Noise noise_highmem_3d(&np_highmem, 1337, 200, 200, 200);
noise_highmem_3d.perlinMap3D(0, 0, 0, NULL);
} catch (InvalidNoiseParamsException &) {
exception_thrown = true;
}
UASSERT(exception_thrown);
}
const float TestNoise::expected_2d_results[10 * 10] = {
19.11726, 18.49626, 16.48476, 15.02135, 14.75713, 16.26008, 17.54822,
18.06860, 18.57016, 18.48407, 18.49649, 17.89160, 15.94162, 14.54901,
14.31298, 15.72643, 16.94669, 17.55494, 18.58796, 18.87925, 16.08101,
15.53764, 13.83844, 12.77139, 12.73648, 13.95632, 14.97904, 15.81829,
18.37694, 19.73759, 13.19182, 12.71924, 11.34560, 10.78025, 11.18980,
12.52303, 13.45012, 14.30001, 17.43298, 19.15244, 10.93217, 10.48625,
9.30923, 9.18632, 10.16251, 12.11264, 13.19697, 13.80801, 16.39567,
17.66203, 10.40222, 9.86070, 8.47223, 8.45471, 10.04780, 13.54730,
15.33709, 15.48503, 16.46177, 16.52508, 10.80333, 10.19045, 8.59420,
8.47646, 10.22676, 14.43173, 16.48353, 16.24859, 16.20863, 15.52847,
11.01179, 10.45209, 8.98678, 8.83986, 10.43004, 14.46054, 16.29387,
15.73521, 15.01744, 13.85542, 10.55201, 10.33375, 9.85102, 10.07821,
11.58235, 15.62046, 17.35505, 16.13181, 12.66011, 9.51853, 11.50994,
11.54074, 11.77989, 12.29790, 13.76139, 17.81982, 19.49008, 17.79470,
12.34344, 7.78363,
};
const float TestNoise::expected_3d_results[10 * 10 * 10] = {
19.11726, 18.01059, 16.90392, 15.79725, 16.37154, 17.18597, 18.00040,
18.33467, 18.50889, 18.68311, 17.85386, 16.90585, 15.95785, 15.00985,
15.61132, 16.43415, 17.25697, 17.95415, 18.60942, 19.26471, 16.59046,
15.80112, 15.01178, 14.22244, 14.85110, 15.68232, 16.51355, 17.57361,
18.70996, 19.84631, 15.32705, 14.69638, 14.06571, 13.43504, 14.09087,
14.93050, 15.77012, 17.19309, 18.81050, 20.42790, 15.06729, 14.45855,
13.84981, 13.24107, 14.39364, 15.79782, 17.20201, 18.42640, 19.59085,
20.75530, 14.95090, 14.34456, 13.73821, 13.13187, 14.84825, 16.89645,
18.94465, 19.89025, 20.46832, 21.04639, 14.83452, 14.23057, 13.62662,
13.02267, 15.30287, 17.99508, 20.68730, 21.35411, 21.34580, 21.33748,
15.39817, 15.03590, 14.67364, 14.31137, 16.78242, 19.65824, 22.53405,
22.54626, 21.60395, 20.66164, 16.18850, 16.14768, 16.10686, 16.06603,
18.60362, 21.50956, 24.41549, 23.64784, 21.65566, 19.66349, 16.97884,
17.25946, 17.54008, 17.82069, 20.42482, 23.36088, 26.29694, 24.74942,
21.70738, 18.66534, 18.78506, 17.51834, 16.25162, 14.98489, 15.14217,
15.50287, 15.86357, 16.40597, 17.00895, 17.61193, 18.20160, 16.98795,
15.77430, 14.56065, 14.85059, 15.35533, 15.86007, 16.63399, 17.49763,
18.36128, 17.61814, 16.45757, 15.29699, 14.13641, 14.55902, 15.20779,
15.85657, 16.86200, 17.98632, 19.11064, 17.03468, 15.92718, 14.81968,
13.71218, 14.26744, 15.06026, 15.85306, 17.09001, 18.47501, 19.86000,
16.67870, 15.86256, 15.04641, 14.23026, 15.31397, 16.66909, 18.02420,
18.89042, 19.59369, 20.29695, 16.35522, 15.86447, 15.37372, 14.88297,
16.55165, 18.52883, 20.50600, 20.91547, 20.80237, 20.68927, 16.03174,
15.86639, 15.70103, 15.53568, 17.78933, 20.38857, 22.98780, 22.94051,
22.01105, 21.08159, 16.42434, 16.61407, 16.80381, 16.99355, 19.16133,
21.61169, 24.06204, 23.65252, 22.28970, 20.92689, 17.05562, 17.61035,
18.16508, 18.71981, 20.57809, 22.62260, 24.66711, 23.92686, 22.25835,
20.58984, 17.68691, 18.60663, 19.52635, 20.44607, 21.99486, 23.63352,
25.27217, 24.20119, 22.22699, 20.25279, 18.45285, 17.02608, 15.59931,
14.17254, 13.91279, 13.81976, 13.72674, 14.47727, 15.50900, 16.54073,
18.54934, 17.07005, 15.59076, 14.11146, 14.08987, 14.27651, 14.46316,
15.31383, 16.38584, 17.45785, 18.64582, 17.11401, 15.58220, 14.05039,
14.26694, 14.73326, 15.19958, 16.15038, 17.26268, 18.37498, 18.74231,
17.15798, 15.57364, 13.98932, 14.44402, 15.19001, 15.93600, 16.98694,
18.13952, 19.29210, 18.29012, 17.26656, 16.24301, 15.21946, 16.23430,
17.54035, 18.84639, 19.35445, 19.59653, 19.83860, 17.75954, 17.38438,
17.00923, 16.63407, 18.25505, 20.16120, 22.06734, 21.94068, 21.13642,
20.33215, 17.22896, 17.50220, 17.77544, 18.04868, 20.27580, 22.78205,
25.28829, 24.52691, 22.67631, 20.82571, 17.45050, 18.19224, 18.93398,
19.67573, 21.54024, 23.56514, 25.59004, 24.75878, 22.97546, 21.19213,
17.92274, 19.07302, 20.22330, 21.37358, 22.55256, 23.73565, 24.91873,
24.20587, 22.86103, 21.51619, 18.39499, 19.95381, 21.51263, 23.07145,
23.56490, 23.90615, 24.24741, 23.65296, 22.74660, 21.84024, 18.12065,
16.53382, 14.94700, 13.36018, 12.68341, 12.13666, 11.58990, 12.54858,
14.00906, 15.46955, 18.89708, 17.15214, 15.40721, 13.66227, 13.32914,
13.19769, 13.06625, 13.99367, 15.27405, 16.55443, 19.67351, 17.77046,
15.86741, 13.96436, 13.97486, 14.25873, 14.54260, 15.43877, 16.53904,
17.63931, 20.44994, 18.38877, 16.32761, 14.26645, 14.62059, 15.31977,
16.01895, 16.88387, 17.80403, 18.72419, 19.90153, 18.67057, 17.43962,
16.20866, 17.15464, 18.41161, 19.66858, 19.81848, 19.59936, 19.38024,
19.16386, 18.90429, 18.64473, 18.38517, 19.95845, 21.79357, 23.62868,
22.96589, 21.47046, 19.97503, 18.42618, 19.13802, 19.84985, 20.56168,
22.76226, 25.17553, 27.58879, 26.11330, 23.34156, 20.56982, 18.47667,
19.77041, 21.06416, 22.35790, 23.91914, 25.51859, 27.11804, 25.86504,
23.66121, 21.45738, 18.78986, 20.53570, 22.28153, 24.02736, 24.52704,
24.84869, 25.17035, 24.48488, 23.46371, 22.44254, 19.10306, 21.30098,
23.49890, 25.69682, 25.13494, 24.17879, 23.22265, 23.10473, 23.26621,
23.42769, 17.93453, 16.72707, 15.51962, 14.31216, 12.96039, 11.58800,
10.21561, 11.29675, 13.19573, 15.09471, 18.05853, 16.85308, 15.64762,
14.44216, 13.72634, 13.08047, 12.43459, 13.48912, 15.11045, 16.73179,
18.18253, 16.97908, 15.77562, 14.57217, 14.49229, 14.57293, 14.65357,
15.68150, 17.02518, 18.36887, 18.30654, 17.10508, 15.90363, 14.70217,
15.25825, 16.06540, 16.87255, 17.87387, 18.93991, 20.00595, 17.54117,
17.32369, 17.10622, 16.88875, 18.07494, 19.46166, 20.84837, 21.12988,
21.04298, 20.95609, 16.64874, 17.55554, 18.46234, 19.36913, 21.18461,
23.12989, 25.07517, 24.53784, 23.17297, 21.80810, 15.75632, 17.78738,
19.81845, 21.84951, 24.29427, 26.79812, 29.30198, 27.94580, 25.30295,
22.66010, 15.98046, 18.43027, 20.88008, 23.32989, 25.21976, 27.02964,
28.83951, 27.75863, 25.71416, 23.66970, 16.57679, 19.21017, 21.84355,
24.47693, 25.41719, 26.11557, 26.81396, 26.37308, 25.55245, 24.73182,
17.17313, 19.99008, 22.80702, 25.62397, 25.61462, 25.20151, 24.78840,
