mat4 operator*(const mat4 &rhs) const
{
return mat4(
_11 * rhs._11 + _12 * rhs._21 + _13 * rhs._31 + _14 * rhs._41,
_11 * rhs._12 + _12 * rhs._22 + _13 * rhs._32 + _14 * rhs._42,
_11 * rhs._13 + _12 * rhs._23 + _13 * rhs._33 + _14 * rhs._43,
_11 * rhs._14 + _12 * rhs._24 + _13 * rhs._34 + _14 * rhs._44,
_21 * rhs._11 + _22 * rhs._21 + _23 * rhs._31 + _24 * rhs._41,
_21 * rhs._12 + _22 * rhs._22 + _23 * rhs._32 + _24 * rhs._42,
_21 * rhs._13 + _22 * rhs._23 + _23 * rhs._33 + _24 * rhs._43,
_21 * rhs._14 + _22 * rhs._24 + _23 * rhs._34 + _24 * rhs._44,
_31 * rhs._11 + _32 * rhs._21 + _33 * rhs._31 + _34 * rhs._41,
_31 * rhs._12 + _32 * rhs._22 + _33 * rhs._32 + _34 * rhs._42,
_31 * rhs._13 + _32 * rhs._23 + _33 * rhs._33 + _34 * rhs._43,
_31 * rhs._14 + _32 * rhs._24 + _33 * rhs._34 + _34 * rhs._44,
_41 * rhs._11 + _42 * rhs._21 + _43 * rhs._31 + _44 * rhs._41,
_41 * rhs._12 + _42 * rhs._22 + _43 * rhs._32 + _44 * rhs._42,
_41 * rhs._13 + _42 * rhs._23 + _43 * rhs._33 + _44 * rhs._43,
_41 * rhs._14 + _42 * rhs._24 + _43 * rhs._34 + _44 * rhs._44);
}
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