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feat(matrix): add C44Matrix::Determinant

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fallenoak 2020-11-29 13:32:25 -06:00
parent 7da043cd47
commit 63a478841a
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3 changed files with 25 additions and 0 deletions
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20
test/Matrix.cpp
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@ -107,3 +107,23 @@ TEST_CASE("C44Matrix::Adjoint", "[matrix]") {
CHECK(matrix.d3 == 16.0f);
}
}
TEST_CASE("C44Matrix::Determinant", "[matrix]") {
SECTION("returns determinant of identity matrix") {
C44Matrix matrix;
auto determinant = matrix.Determinant();
REQUIRE(determinant == 1.0f);
}
SECTION("returns determinant of zero matrix") {
auto matrix = C44Matrix(0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f, 0.0f);
auto determinant = matrix.Determinant();
REQUIRE(determinant == 0.0f);
}
SECTION("returns determinant of non-identity matrix") {
auto matrix = C44Matrix(-1.0f, 2.0f, 3.0f, 4.0f, 5.0f, 6.0f, 7.0f, 8.0f, 9.0f, 10.0f, -11.0f, 12.0f, 13.0f, 14.0f, 15.0f, 16.0f);
auto determinant = matrix.Determinant();
REQUIRE(determinant == -704.0f);
}
}