Pre-multiply this matrix by the supplied <code>left</code> matrix and store the result in <code>this</code>.
<p>
If <code>M</code> is <code>this</code> matrix and <code>L</code> the <code>left</code> matrix,
then the new matrix will be <code>L * M</code>. So when transforming a
vector <code>v</code> with the new matrix by using <code>L * M * v</code>, the
transformation of <code>this</code> matrix will be applied first!
@param left
the left operand of the matrix multiplication
@return this
Pre-multiply this matrix by the supplied <code>left</code> matrix and store the result in <code>this</code>. <p> If <code>M</code> is <code>this</code> matrix and <code>L</code> the <code>left</code> matrix, then the new matrix will be <code>L * M</code>. So when transforming a vector <code>v</code> with the new matrix by using <code>L * M * v</code>, the transformation of <code>this</code> matrix will be applied first!
@param left the left operand of the matrix multiplication @return this