src/third_party/glm/test/gtx/gtx_fast_square_root.cpp

#include <glm/gtx/fast_square_root.hpp>
#include <glm/gtc/type_precision.hpp>
#include <glm/gtc/epsilon.hpp>
#include <glm/vector_relational.hpp>

int test_fastInverseSqrt()
{
	int Error(0);

	Error += glm::epsilonEqual(glm::fastInverseSqrt(1.0f), 1.0f, 0.01f) ? 0 : 1;
	Error += glm::epsilonEqual(glm::fastInverseSqrt(1.0), 1.0, 0.01) ? 0 : 1;
	Error += glm::all(glm::epsilonEqual(glm::fastInverseSqrt(glm::vec2(1.0f)), glm::vec2(1.0f), 0.01f)) ? 0 : 1;
	Error += glm::all(glm::epsilonEqual(glm::fastInverseSqrt(glm::dvec3(1.0)), glm::dvec3(1.0), 0.01)) ? 0 : 1;
	Error += glm::all(glm::epsilonEqual(glm::fastInverseSqrt(glm::dvec4(1.0)), glm::dvec4(1.0), 0.01)) ? 0 : 1;

	
	return 0;
}

int test_fastDistance()
{
	int Error(0);

	glm::mediump_f32 A = glm::fastDistance(glm::mediump_f32(0.0f), glm::mediump_f32(1.0f));
	glm::mediump_f32 B = glm::fastDistance(glm::mediump_f32vec2(0.0f), glm::mediump_f32vec2(1.0f, 0.0f));
	glm::mediump_f32 C = glm::fastDistance(glm::mediump_f32vec3(0.0f), glm::mediump_f32vec3(1.0f, 0.0f, 0.0f));
	glm::mediump_f32 D = glm::fastDistance(glm::mediump_f32vec4(0.0f), glm::mediump_f32vec4(1.0f, 0.0f, 0.0f, 0.0f));

	Error += glm::epsilonEqual(A, glm::mediump_f32(1.0f), glm::mediump_f32(0.01f)) ? 0 : 1;
	Error += glm::epsilonEqual(B, glm::mediump_f32(1.0f), glm::mediump_f32(0.01f)) ? 0 : 1;
	Error += glm::epsilonEqual(C, glm::mediump_f32(1.0f), glm::mediump_f32(0.01f)) ? 0 : 1;
	Error += glm::epsilonEqual(D, glm::mediump_f32(1.0f), glm::mediump_f32(0.01f)) ? 0 : 1;

	return Error;
}

int main()
{
	int Error(0);

	Error += test_fastInverseSqrt();
	Error += test_fastDistance();

	return Error;
}