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XMMATRIX::operator*= function (directxmath.h)

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Performs a matrix multiplication of the current instance of XMMATRIX by another instance of XMMATRIX and returns a reference to the current instance, which has been updated.

This operator performs a matrix multiplication of the current instance of XMMATRIX by another instance of XMMATRIX and returns a reference to the current instance, which has been updated.

Note  This operator is only available when developing with C++.
 

Syntax

XMMATRIX &XM_CALLCONV operator*=(
  [ref] FXMMATRIX M
) noexcept;

Parameters

[ref] M

Instance of XMMATRIX to be multiplied against the current instance of XMMATRIX.

Return value

Reference to the current instance of XMMATRIX, which has been updated by this operator.

Remarks

The current XMMATRIX is the left hand side of the matrix multiplication. That is the matrix operation mat1 = mat1 * M can be implemented as:

      XMMATRIX mat1;
      XMMATRIX M
      mat1 *= M
And is equivalent to using operator* and assigning the result to the call's first argument. 
      const XMMATRIX& M;
      XMMATRIX& mat1;
      mat1 = XMMatrixMultiply(mat1, M);

Requirements

Requirement Value
Target Platform Windows
Header directxmath.h

See also

Reference

XMMATRIX

XMMATRIX Operators