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Remove unncessary divisions for mat inverses
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@ -40,6 +40,7 @@
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#include "type_mat4x3.hpp"
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#include "type_mat4x4.hpp"
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#include <limits>
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#include <type_traits>
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namespace glm{
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namespace detail
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@ -456,13 +457,13 @@ namespace detail
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{
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static detail::tmat2x2<T, P> call(detail::tmat2x2<T, P> const & m)
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{
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T Determinant = determinant(m);
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T OneOverDeterminant = 1 / determinant(m);
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detail::tmat2x2<T, P> Inverse(
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+ m[1][1] / Determinant,
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- m[0][1] / Determinant,
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- m[1][0] / Determinant,
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+ m[0][0] / Determinant);
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+ m[1][1] * OneOverDeterminant,
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- m[0][1] * OneOverDeterminant,
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- m[1][0] * OneOverDeterminant,
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+ m[0][0] * OneOverDeterminant);
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return Inverse;
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}
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@ -473,7 +474,7 @@ namespace detail
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{
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static detail::tmat3x3<T, P> call(detail::tmat3x3<T, P> const & m)
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{
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T Determinant = determinant(m);
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T OneOverDeterminant = 1 / determinant(m);
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detail::tmat3x3<T, P> Inverse(detail::tmat3x3<T, P>::_null);
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Inverse[0][0] = + (m[1][1] * m[2][2] - m[2][1] * m[1][2]);
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@ -485,7 +486,7 @@ namespace detail
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Inverse[0][2] = + (m[0][1] * m[1][2] - m[1][1] * m[0][2]);
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Inverse[1][2] = - (m[0][0] * m[1][2] - m[1][0] * m[0][2]);
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Inverse[2][2] = + (m[0][0] * m[1][1] - m[1][0] * m[0][1]);
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Inverse /= Determinant;
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Inverse *= OneOverDeterminant;
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return Inverse;
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}
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@ -544,9 +545,9 @@ namespace detail
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detail::tvec4<T, P> Row0(Inverse[0][0], Inverse[1][0], Inverse[2][0], Inverse[3][0]);
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T Determinant = dot(m[0], Row0);
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T OneOverDeterminant = 1 / dot(m[0], Row0);
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Inverse /= Determinant;
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Inverse *= OneOverDeterminant;
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return Inverse;
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}
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