#include "udf.h"

DEFINE_SDOF_PROPERTIES(test_box, prop, dt, time, dtime)

{

prop[SDOF_MASS] = 15.198;

prop[SDOF_IXX] = 1644317e-9;

prop[SDOF_IYY] = 1644317e-9;

prop[SDOF_IZZ] = 3072632e-9;

prop[SDOF_ZERO_TRANS_X] = TRUE;

prop[SDOF_ZERO_TRANS_Y] = TRUE;

prop[SDOF_ZERO_TRANS_Z] = TRUE;

prop[SDOF_ZERO_ROT_X] = TRUE;

prop[SDOF_ZERO_ROT_Y] = TRUE;

printf ("\nstage: updated 6DOF properties");

}

设置以后默认是以原点坐标旋转的，我要怎么设置才能使其绕坐标（20,50）旋转？