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* make PartialLU avoid to generate inf/nan when given a singular matrix

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(result undefined, but at least it won't take forever on intel 387)
* add lots of comments, especially to LU.h
* fix stuff I had broken in Inverse.h
* split inverse test
This commit is contained in:
Benoit Jacob
2009-10-20 00:36:07 -04:00
parent d1db1352f5
commit 13f31b8daf
5 changed files with 82 additions and 27 deletions
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14
test/inverse.cpp
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@@ -83,19 +83,21 @@ void test_inverse()
{
int s;
for(int i = 0; i < g_repeat; i++) {
CALL_SUBTEST( inverse(Matrix<double,1,1>()) );
CALL_SUBTEST( inverse(Matrix2d()) );
CALL_SUBTEST( inverse(Matrix3f()) );
CALL_SUBTEST( inverse(Matrix4f()) );
CALL_SUBTEST1( inverse(Matrix<double,1,1>()) );
CALL_SUBTEST2( inverse(Matrix2d()) );
CALL_SUBTEST3( inverse(Matrix3f()) );
CALL_SUBTEST4( inverse(Matrix4f()) );
s = ei_random<int>(50,320);
CALL_SUBTEST( inverse(MatrixXf(s,s)) );
CALL_SUBTEST5( inverse(MatrixXf(s,s)) );
s = ei_random<int>(25,100);
CALL_SUBTEST( inverse(MatrixXcd(s,s)) );
CALL_SUBTEST6( inverse(MatrixXcd(s,s)) );
}
#ifdef EIGEN_TEST_PART_4
// test some tricky cases for 4x4 matrices
VERIFY_IS_APPROX((Matrix4f() << 0,0,1,0, 1,0,0,0, 0,1,0,0, 0,0,0,1).finished().inverse(),
(Matrix4f() << 0,1,0,0, 0,0,1,0, 1,0,0,0, 0,0,0,1).finished());
VERIFY_IS_APPROX((Matrix4f() << 1,0,0,0, 0,0,1,0, 0,0,0,1, 0,1,0,0).finished().inverse(),
(Matrix4f() << 1,0,0,0, 0,0,0,1, 0,1,0,0, 0,0,1,0).finished());
#endif
}