Transforming Normal Vectors

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/bainaqianhong/article/details/82586713

Introduction to 3D Game Programming with DirectX 12
8.2.2 Transforming Normal Vectors

static XMMATRIX InverseTranspose(CXMMATRIX M)
{
    XMMATRIX A = M;
    A.r[3] = XMVectorSet(0.0f, 0.0f, 0.0f, 1.0f);
    XMVECTOR det = XMMatrixDeterminant(A);
    return XMMatrixTranspose(XMMatrixInverse(&det, A));
}