一个点绕着另一个点旋转一定角度后的坐标

double x = vec_endPoint_rotate.x();
double y = vec_endPoint_rotate.y();

double dx = vec_center_rotate.x();
double dy = vec_center_rotate.y();
//一个点(x,y)绕任意点(dx,dy)顺时针旋转a度后的坐标

double xx = (x - dx)*cos(angleParam* VC_PI / 180) - (y - dy)*sin(angleParam* VC_PI / 180) + dx;
double yy = (x - dx)*sin(angleParam* VC_PI / 180) + (y - dy)*cos(angleParam* VC_PI / 180) + dy;