平面上任意一点A（X1，Y1），绕某固定点（X0，Y0）顺时针旋转角A后，其新坐标是？

void newPos(double lfCenterX,double lfCenterY,double lfOldX,double lfOldY, double lfRadian, double& lfNewX,double& lfNewY)
{
double cosv = (double) cos(lfRadian);
double sinv = (double) sin(lfRadian);


lfNewX = (double)((lfOldX-lfCenterX)*cosv-(lfOldY-lfCenterY)*sinv+lfCenterX);
lfNewY = (double)((lfOldX-lfCenterX)*sinv+(lfOldY-lfCenterY)*cosv+lfCenterY);
}