XMFLOAT3X4::operator() function (directxmath.h)

Returns a copy of a matrix element of an XMFLOAT3X4, specified by row and column arguments.

Syntax

float operator()(
  size_t Row,
  size_t Column
) noexcept;

Row

Type: size_t

The 0-based row number of the matrix element to retrieve.

Column

Type: size_t

The 0-based column number of the matrix element to retrieve.

Type: float &

An lvalue reference to the specified element.

Because an lvalue reference to the matrix element is returned, you can use this operator to update the value of an element.

The code example below shows two different ways of setting mat.m[2,3] (or, equivalently, mat._34) to the value 42.0.

DirectX::XMFLOAT4X3 mat;

float& a{ mat(2, 3) };
a = 42.0;

mat(2, 3) = 42.0;