Added test for fastSin #231

test/gtx/gtx_fast_trigonometry.cpp

@@ -9,10 +9,29 @@
 
 #include <glm/gtc/type_precision.hpp>
 #include <glm/gtx/fast_trigonometry.hpp>
+#include <glm/gtc/constants.hpp>
+
+int test_fastSin()
+{
+	int Error(0);
+
+	float DiffMax = 0.0f;
+	for(std::size_t i = 0; i < 10000; ++i)
+	{
+		float angle = glm::pi<float>() * 2.0f / static_cast<float>(i + 1);
+		float A = glm::sin(angle);
+		float B = glm::fastSin(angle);
+		DiffMax = glm::max(DiffMax, glm::abs(B - A));
+	}
+
+	return Error;
+}
 
 int main()
 {
 	int Error(0);
 
+	Error += test_fastSin();
+
 	return Error;
 }