games/minimal/mods/default/textures/default_paper.png

/*
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,
	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,
ofs	hex dump	ascii
0000	89 50 4e 47 0d 0a 1a 0a 00 00 00 0d 49 48 44 52 00 00 00 10 00 00 00 11 08 03 00 00 00 e3 71 dc	.PNG........IHDR..............q.
0020	f6 00 00 00 09 50 4c 54 45 00 00 00 55 57 53 d3 d7 cf c6 c6 c4 83 00 00 00 01 74 52 4e 53 00 40	.....PLTE...UWS...........tRNS.@
0040	e6 d8 66 00 00 00 30 49 44 41 54 78 da a5 c9 b1 11 00 40 08 02 c1 c7 fe 8b fe 0b 1c 74 48 bd 6c	..f...0IDATx......@.........tH.l
0060	e1 5d aa 0a 52 98 4c 67 ba b4 18 b4 88 49 73 77 f2 ed a5 39 c1 43 1f 5f ce 00 a5 29 a0 99 7a 00	.]..R.Lg.....Isw...9.C._...)..z.
0080	00 00 00 49 45 4e 44 ae 42 60 82	...IEND.B`.