From 6a45579dbbf991c0e12ce59958e3b533d19fc9d4 Mon Sep 17 00:00:00 2001
From: jjesswan <jessica_wan@brown.edu>
Date: Tue, 7 May 2024 06:02:29 -0400
Subject: rotating skyboxgit add -A

---
 glm-master/test/gtx/gtx_integer.cpp | 108 ++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 glm-master/test/gtx/gtx_integer.cpp

(limited to 'glm-master/test/gtx/gtx_integer.cpp')

diff --git a/glm-master/test/gtx/gtx_integer.cpp b/glm-master/test/gtx/gtx_integer.cpp
new file mode 100644
index 0000000..4c4225d
--- /dev/null
+++ b/glm-master/test/gtx/gtx_integer.cpp
@@ -0,0 +1,108 @@
+#define GLM_ENABLE_EXPERIMENTAL
+#include <glm/exponential.hpp>
+#include <glm/gtc/epsilon.hpp>
+#include <glm/gtx/integer.hpp>
+#include <cstdio>
+/*
+int test_floor_log2()
+{
+	int Error = 0;
+
+	for(std::size_t i = 1; i < 1000000; ++i)
+	{
+		glm::uint A = glm::floor_log2(glm::uint(i));
+		glm::uint B = glm::uint(glm::floor(glm::log2(double(i)))); // Will fail with float, lack of accuracy
+
+		Error += A == B ? 0 : 1;
+		assert(!Error);
+	}
+
+	return Error;
+}
+*/
+int test_log2()
+{
+	int Error = 0;
+
+	for(std::size_t i = 1; i < 24; ++i)
+	{
+		glm::uint A = glm::log2(glm::uint(1 << i));
+		glm::uint B = glm::uint(glm::log2(double(1 << i)));
+
+		//Error += glm::equalEpsilon(double(A), B, 1.0) ? 0 : 1;
+		Error += glm::abs(double(A) - B) <= 24 ? 0 : 1;
+		assert(!Error);
+
+		std::printf("Log2(%d) error A=%d, B=%d\n", 1 << i, A, B);
+	}
+
+	std::printf("log2 error=%d\n", Error);
+
+	return Error;
+}
+
+int test_nlz()
+{
+	int Error = 0;
+
+	for(glm::uint i = 1; i < glm::uint(33); ++i)
+		Error += glm::nlz(i) == glm::uint(31u) - glm::findMSB(i) ? 0 : 1;
+		//printf("%d, %d\n", glm::nlz(i), 31u - glm::findMSB(i));
+
+	return Error;
+}
+
+int test_pow_uint()
+{
+	int Error = 0;
+
+	glm::uint const p0 = glm::pow(2u, 0u);
+	Error += p0 == 1u ? 0 : 1;
+
+	glm::uint const p1 = glm::pow(2u, 1u);
+	Error += p1 == 2u ? 0 : 1;
+
+	glm::uint const p2 = glm::pow(2u, 2u);
+	Error += p2 == 4u ? 0 : 1;
+
+	return Error;
+}
+
+int test_pow_int()
+{
+	int Error = 0;
+
+	int const p0 = glm::pow(2, 0u);
+	Error += p0 == 1 ? 0 : 1;
+
+	int const p1 = glm::pow(2, 1u);
+	Error += p1 == 2 ? 0 : 1;
+
+	int const p2 = glm::pow(2, 2u);
+	Error += p2 == 4 ? 0 : 1;
+
+	int const p0n = glm::pow(-2, 0u);
+	Error += p0n == -1 ? 0 : 1;
+
+	int const p1n = glm::pow(-2, 1u);
+	Error += p1n == -2 ? 0 : 1;
+
+	int const p2n = glm::pow(-2, 2u);
+	Error += p2n == 4 ? 0 : 1;
+
+	return Error;
+}
+
+int main()
+{
+	int Error = 0;
+
+	Error += test_nlz();
+//	Error += test_floor_log2();
+	Error += test_log2();
+	Error += test_pow_uint();
+	Error += test_pow_int();
+
+	return Error;
+}
+
-- 
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