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LibGfx+LibGL: Allow singular matrices to be inverted

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This is basically the old behavior before the GLtron port was
introduced, but `.inverse()` no longer crashes if the matrix is
singular.
This commit is contained in:
Jelle Raaijmakers 2022-01-12 00:54:14 +01:00 • committed by Linus Groh
parent b2e0bf24ef
commit a41d5ffa1e
2 changed files with 5 additions and 12 deletions
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8
Userland/Libraries/LibGfx/Matrix.h
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@ -6,7 +6,6 @@
#pragma once
#include <AK/Error.h>
#include <AK/Types.h>
#include <initializer_list>
@ -159,12 +158,9 @@ public:
return result;
}
[[nodiscard]] constexpr ErrorOr<Matrix> inverse() const
[[nodiscard]] constexpr Matrix inverse() const
{
auto det = determinant();
if (det == 0)
return Error::from_string_literal("inverse of matrix does not exist"sv);
return adjugate() / det;
return adjugate() / determinant();
}
[[nodiscard]] constexpr Matrix transpose() const