--- /dev/null
+#include "StabilityTest.hpp"
+
+#include "math/GaloisLFSR.hpp"
+#include "math/SimplexNoise.hpp"
+#include "math/WorleyNoise.hpp"
+
+#include <cstdint>
+#include <string>
+#include <sstream>
+#include <glm/gtx/io.hpp>
+
+CPPUNIT_TEST_SUITE_REGISTRATION(blobs::math::test::StabilityTest);
+
+using namespace std;
+
+
+namespace blobs {
+namespace math {
+namespace test {
+
+void StabilityTest::setUp() {
+
+}
+
+void StabilityTest::tearDown() {
+
+}
+
+
+void StabilityTest::testRNG() {
+ GaloisLFSR random(0);
+ uint16_t value;
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #1 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #2 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #3 from RNG",
+ uint16_t(0xB000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #4 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #5 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #6 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #7 from RNG",
+ uint16_t(0x4500), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #8 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #9 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #10 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #11 from RNG",
+ uint16_t(0x2E70), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #12 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #13 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #14 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #15 from RNG",
+ uint16_t(0x1011), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #16 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #17 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #18 from RNG",
+ uint16_t(0xB000), value
+ );
+ value = random.Next<uint16_t>();
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #19 from RNG (using Next())",
+ uint16_t(0x0B0B), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #20 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #21 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #22 from RNG",
+ uint16_t(0x1500), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #23 from RNG",
+ uint16_t(0x0454), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #24 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #25 from RNG",
+ uint16_t(0x0000), value
+ );
+ value = random.Next<uint16_t>();
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #26 from RNG (using Next())",
+ uint16_t(0xC970), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #27 from RNG",
+ uint16_t(0x02E5), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #28 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #29 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #30 from RNG",
+ uint16_t(0x0101), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #31 from RNG",
+ uint16_t(0x0100), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #32 from RNG",
+ uint16_t(0x0000), value
+ );
+
+ GaloisLFSR random1(1);
+ uint16_t value1;
+ for (int i = 0; i < 32; ++i) {
+ random1(value1);
+ }
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "RNG with seeds 0 and 1 differ",
+ value, value1
+ );
+
+ GaloisLFSR random_bool(0);
+ bool value_bool;
+ for (int i = 0; i < (16 * 32); ++i) {
+ random_bool(value_bool);
+ }
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected result for bool",
+ false, value_bool
+ );
+
+ GaloisLFSR random8(0);
+ uint8_t value8;
+ for (int i = 0; i < 31; ++i) {
+ random8(value8);
+ }
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected result for uint8",
+ uint8_t(0x10), value8
+ );
+
+ GaloisLFSR random32(0);
+ uint32_t value32;
+ for (int i = 0; i < 16; ++i) {
+ random32(value32);
+ }
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected result for uint32",
+ uint32_t(0xB0000000), value32
+ );
+}
+
+void StabilityTest::testSimplex() {
+ SimplexNoise noise(0);
+
+ Assert(noise, glm::vec3(0.0f, 0.0f, 0.0f), 0.0f);
+ Assert(noise, glm::vec3(0.0f, 0.0f, 1.0f), 0.652221322059631f);
+ Assert(noise, glm::vec3(0.0f, 1.0f, 0.0f), 0.867977976799011f);
+ Assert(noise, glm::vec3(0.0f, 1.0f, 1.0f), -0.107878111302853f);
+ Assert(noise, glm::vec3(1.0f, 0.0f, 0.0f), -0.107878260314465f);
+ Assert(noise, glm::vec3(1.0f, 0.0f, 1.0f), -6.31356940061778e-08f);
+ Assert(noise, glm::vec3(1.0f, 1.0f, 0.0f), -0.107878245413303f);
+ Assert(noise, glm::vec3(1.0f, 1.0f, 1.0f), 0.0f);
+
+ Assert(noise, glm::vec3( 0.0f, 0.0f, -1.0f), -0.107878483831882f);
+ Assert(noise, glm::vec3( 0.0f, -1.0f, 0.0f), -0.760099768638611f);
+ Assert(noise, glm::vec3( 0.0f, -1.0f, -1.0f), 0.0f);
+ Assert(noise, glm::vec3(-1.0f, 0.0f, 0.0f), 0.760099768638611f);
+ Assert(noise, glm::vec3(-1.0f, 0.0f, -1.0f), 0.0f);
+ Assert(noise, glm::vec3(-1.0f, -1.0f, 0.0f), -0.107878118753433f);
+ Assert(noise, glm::vec3(-1.0f, -1.0f, -1.0f), 0.0f);
+}
+
+void StabilityTest::testWorley() {
+ WorleyNoise noise(0);
+
+ Assert(noise, glm::vec3(0.0f, 0.0f, 0.0f), -0.117765009403229f);
+ Assert(noise, glm::vec3(0.0f, 0.0f, 1.0f), -0.209876894950867f);
+ Assert(noise, glm::vec3(0.0f, 1.0f, 0.0f), -0.290086328983307f);
+ Assert(noise, glm::vec3(0.0f, 1.0f, 1.0f), -0.332393705844879f);
+ Assert(noise, glm::vec3(1.0f, 0.0f, 0.0f), -0.621925830841064f);
+ Assert(noise, glm::vec3(1.0f, 0.0f, 1.0f), -0.338455379009247f);
+ Assert(noise, glm::vec3(1.0f, 1.0f, 0.0f), -0.386664032936096f);
+ Assert(noise, glm::vec3(1.0f, 1.0f, 1.0f), -0.533940434455872f);
+
+ Assert(noise, glm::vec3( 0.0f, 0.0f, -1.0f), -0.425480604171753f);
+ Assert(noise, glm::vec3( 0.0f, -1.0f, 0.0f), -0.189745843410492f);
+ Assert(noise, glm::vec3( 0.0f, -1.0f, -1.0f), -0.30408102273941f);
+ Assert(noise, glm::vec3(-1.0f, 0.0f, 0.0f), -0.618566155433655f);
+ Assert(noise, glm::vec3(-1.0f, 0.0f, -1.0f), -0.060045599937439f);
+ Assert(noise, glm::vec3(-1.0f, -1.0f, 0.0f), -0.366827547550201f);
+ Assert(noise, glm::vec3(-1.0f, -1.0f, -1.0f), -0.575981974601746f);
+}
+
+void StabilityTest::Assert(
+ const SimplexNoise &noise,
+ const glm::vec3 &position,
+ float expected
+) {
+ stringstream msg;
+ msg << "unexpected simplex noise value at " << position;
+ CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE(
+ msg.str(),
+ expected, noise(position), numeric_limits<float>::epsilon()
+ );
+}
+
+void StabilityTest::Assert(
+ const WorleyNoise &noise,
+ const glm::vec3 &position,
+ float expected
+) {
+ stringstream msg;
+ msg << "unexpected worley noise value at " << position;
+ CPPUNIT_ASSERT_DOUBLES_EQUAL_MESSAGE(
+ msg.str(),
+ expected, noise(position), numeric_limits<float>::epsilon()
+ );
+}
+
+}
+}
+}
projects / blobs.git / blobdiff