关于WU_Line 反走样算法的

[fromccsu]

上网找到了一个反走样的算法，其中有一段看不懂，肯请高手解答，先谢了
算法地址：www.codeproject.com/KB/GDI/antialias.aspx
这一段看不懂，不知道是什么意思，希望高手解答
while (--DeltaX) {
ErrorAccTemp = ErrorAcc; /* remember currrent accumulated error */
ErrorAcc += ErrorAdj; /* calculate error for next pixel */
if (ErrorAcc <= ErrorAccTemp)
{
/* The error accumulator turned over, so advance the Y coord */
Y0++;
}
X0 += XDir; /* X-major, so always advance X */
/* The IntensityBits most significant bits of ErrorAcc give us the
intensity weighting for this pixel, and the complement of the
weighting for the paired pixel */

[yeah920]

帮忙顶

[dirdirdir3]

就是偏差积累到一定的程度就y加1........