glm/test/gtc/gtc_matrix_inverse.cpp

///////////////////////////////////////////////////////////////////////////////////
/// OpenGL Mathematics (glm.g-truc.net)
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/// @file test/gtc/gtc_matrix_inverse.cpp
/// @date 2010-09-16 / 2014-11-25
/// @author Christophe Riccio
///////////////////////////////////////////////////////////////////////////////////

#include <glm/gtc/matrix_inverse.hpp>
#include <glm/gtc/epsilon.hpp>

int test_affine()
{
	int Error = 0;

	{
		glm::mat3 const M(
			2.f, 0.f, 0.f,
			0.f, 2.f, 0.f,
			0.f, 0.f, 1.f);

		glm::mat3 const A = glm::affineInverse(M);
		glm::mat3 const I = glm::inverse(M);

		glm::mat3 const R = glm::affineInverse(A);

		Error += M != A;
		Error += M == R;
		Error += A == I;
	}

	{
		glm::mat4 const M(
			2.f, 0.f, 0.f, 0.f,
			0.f, 2.f, 0.f, 0.f,
			0.f, 0.f, 2.f, 0.f,
			0.f, 0.f, 0.f, 1.f);

		glm::mat4 const A = glm::affineInverse(M);
		glm::mat4 const I = glm::inverse(M);

		glm::mat4 const R = glm::affineInverse(A);

		Error += M != A;
		Error += M == R;
		Error += A == I;
	}

	return Error;
}

int main()
{
	int Error = 0;

	Error += test_affine();

	return Error;
}