glm/test/gtx/gtx_component_wise.cpp

///////////////////////////////////////////////////////////////////////////////////
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/// @file test/gtx/gtx_component_wise.cpp
/// @date 2013-10-25 / 2015-09-25
/// @author Christophe Riccio
///////////////////////////////////////////////////////////////////////////////////

#include <glm/gtx/component_wise.hpp>
#include <glm/gtc/type_precision.hpp>
#include <glm/gtc/epsilon.hpp>
#include <glm/gtc/constants.hpp>
#include <limits>

namespace integer_8bit_test
{
	int run()
	{
		int Error(0);

		{
			glm::vec4 const A = glm::compNormalize<float>(glm::u8vec4(0, 127, 128, 255));

			Error += glm::epsilonEqual(A.x, 0.0f, glm::epsilon<float>()) ? 0 : 1;
			Error += A.y < 0.5f ? 0 : 1;
			Error += A.z > 0.5f ? 0 : 1;
			Error += glm::epsilonEqual(A.w, 1.0f, glm::epsilon<float>()) ? 0 : 1;
		}

		{
			glm::vec4 const A = glm::compNormalize<float>(glm::i8vec4(-128, -1, 0, 127));

			Error += glm::epsilonEqual(A.x,-1.0f, glm::epsilon<float>()) ? 0 : 1;
			Error += A.y < 0.0f ? 0 : 1;
			Error += A.z > 0.0f ? 0 : 1;
			Error += glm::epsilonEqual(A.w, 1.0f, glm::epsilon<float>()) ? 0 : 1;
		}

		return Error;
	}
}//namespace integer_8bit_test

namespace integer_16bit_test
{
	int run()
	{
		int Error(0);

		{
			glm::vec4 const A = glm::compNormalize<float>(glm::u16vec4(
				std::numeric_limits<glm::u16>::min(),
				(std::numeric_limits<glm::u16>::max() >> 1) + 0,
				(std::numeric_limits<glm::u16>::max() >> 1) + 1,
				std::numeric_limits<glm::u16>::max()));

			Error += glm::epsilonEqual(A.x, 0.0f, glm::epsilon<float>()) ? 0 : 1;
			Error += A.y < 0.5f ? 0 : 1;
			Error += A.z > 0.5f ? 0 : 1;
			Error += glm::epsilonEqual(A.w, 1.0f, glm::epsilon<float>()) ? 0 : 1;
		}

		{
			glm::vec4 const A = glm::compNormalize<float>(glm::i16vec4(
				std::numeric_limits<glm::i16>::min(),
				static_cast<glm::i16>(-1),
				static_cast<glm::i16>(0),
				std::numeric_limits<glm::i16>::max()));

			Error += glm::epsilonEqual(A.x,-1.0f, glm::epsilon<float>()) ? 0 : 1;
			Error += A.y < 0.0f ? 0 : 1;
			Error += A.z > 0.0f ? 0 : 1;
			Error += glm::epsilonEqual(A.w, 1.0f, glm::epsilon<float>()) ? 0 : 1;
		}

		return Error;
	}
}//namespace integer_16bit_test

int main()
{
	int Error(0);

	Error += integer_8bit_test::run();
	Error += integer_16bit_test::run();

	return Error;
}