--- /dev/null
+#include "StabilityTest.hpp"
+
+#include "rand/GaloisLFSR.hpp"
+#include "rand/SimplexNoise.hpp"
+
+#include <cstdint>
+#include <string>
+#include <sstream>
+#include <glm/gtx/io.hpp>
+
+CPPUNIT_TEST_SUITE_REGISTRATION(blank::test::StabilityTest);
+
+using namespace std;
+
+
+namespace blank {
+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
+ );
+ 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(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #12 from RNG",
+ uint16_t(0x2E70), 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(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #16 from RNG",
+ uint16_t(0x1011), 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(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #19 from RNG",
+ uint16_t(0xB000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #20 from RNG",
+ uint16_t(0x0B0B), 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(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #23 from RNG",
+ uint16_t(0x1500), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #24 from RNG",
+ uint16_t(0x0454), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #25 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #26 from RNG",
+ uint16_t(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #27 from RNG",
+ uint16_t(0xC970), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #28 from RNG",
+ uint16_t(0x02E5), 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(0x0000), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #31 from RNG",
+ uint16_t(0x0101), value
+ );
+ random(value);
+ CPPUNIT_ASSERT_EQUAL_MESSAGE(
+ "unexpected value #32 from RNG",
+ uint16_t(0x0100), value
+ );
+}
+
+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::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()
+ );
+}
+
+}
+}
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