有没有办法访问向量类型的第 j 个分量,例如
int4
int4 temp = (int4)(10,20,30,40) for (int j = 0; j < 4; ++j){ int component_j = shuffle(pix, (uint4)(j,(j+1)&3,(j+2)&3,(j+3)&3)).s0; }