test: new test for trigonometric functions.

test/Makefile.am

@@ -18,7 +18,7 @@ noinst_PROGRAMS = quad lol-bench $(cppunit_tests)
 
 TESTS = $(cppunit_tests)
 
-lol_test_SOURCES = lol-test.cpp matrix.cpp half.cpp
+lol_test_SOURCES = lol-test.cpp matrix.cpp half.cpp trig.cpp
 lol_test_CXXFLAGS = $(CPPUNIT_CFLAGS)
 lol_test_CPPFLAGS = @LOL_CFLAGS@ @PIPI_CFLAGS@
 lol_test_LDADD = $(CPPUNIT_LIBS)

test/trig.cpp

@@ -0,0 +1,63 @@
+//
+// Lol Engine
+//
+// Copyright: (c) 2010-2011 Sam Hocevar <sam@hocevar.net>
+//   This program is free software; you can redistribute it and/or
+//   modify it under the terms of the Do What The Fuck You Want To
+//   Public License, Version 2, as published by Sam Hocevar. See
+//   http://sam.zoy.org/projects/COPYING.WTFPL for more details.
+//
+
+#if defined HAVE_CONFIG_H
+#   include "config.h"
+#endif
+
+#include <cppunit/extensions/HelperMacros.h>
+#include <cppunit/TestCaller.h>
+#include <cppunit/TestCase.h>
+#include <cppunit/TestSuite.h>
+
+#include <cmath>
+
+#include "core.h"
+
+namespace lol
+{
+
+class TrigTest : public CppUnit::TestCase
+{
+    CPPUNIT_TEST_SUITE(TrigTest);
+    CPPUNIT_TEST(test_sin);
+    CPPUNIT_TEST_SUITE_END();
+
+public:
+    TrigTest() : CppUnit::TestCase("Trigonometry Test") {}
+
+    void setUp() {}
+
+    void tearDown() {}
+
+    void test_sin()
+    {
+        for (int i = -10000; i < 10000; i++)
+        {
+            float f = (float)i * (1.0f / 1000.0f);
+            double a = __builtin_sin(f);
+            double b = lol_sin(f);
+            CPPUNIT_ASSERT(fabs(a - b) <= fabs(f) * 1e-10f);
+        }
+
+        for (int i = -10000; i < 10000; i++)
+        {
+            float f = (float)i * (1.0f / 100000.0f);
+            double a = __builtin_sin(f);
+            double b = lol_sin(f);
+            CPPUNIT_ASSERT(fabs(a - b) <= fabs(f) * 1e-10f);
+        }
+    }
+};
+
+CPPUNIT_TEST_SUITE_REGISTRATION(TrigTest);
+
+} /* namespace lol */
+