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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 testNoise2dPoint();
void testNoise2dBulk();
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(testNoise2dPoint);
TEST(testNoise2dBulk);
TEST(testNoise3dPoint);
TEST(testNoise3dBulk);
TEST(testNoiseInvalidParams);
}
////////////////////////////////////////////////////////////////////////////////
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::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,
