X-Git-Url: http://git.localhorst.tv/?a=blobdiff_plain;f=tst%2Frand%2FStabilityTest.cpp;fp=tst%2Frand%2FStabilityTest.cpp;h=9ed047d211e931de1cd32adeeb897026e07cf509;hb=9240fdf2e68ee014da0d0a89a7fb2f29ebf28e2d;hp=0000000000000000000000000000000000000000;hpb=825f479edf9867938b6789215ad7ae6303596cba;p=blank.git

diff --git a/tst/rand/StabilityTest.cpp b/tst/rand/StabilityTest.cpp
new file mode 100644
index 0000000..9ed047d
--- /dev/null
+++ b/tst/rand/StabilityTest.cpp
@@ -0,0 +1,227 @@
+#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()
+	);
+}
+
+}
+}