private Vector3 CalculateForce(ITraceable astralBody, int sampleTime)
{
Vector3 result = new Vector3(0, 0, 0);
//求合力
foreach (ITraceable body in astralBody.GetAffectedPlanets())
{
if (body == astralBody)
{
continue;
}
result += GetGravityVector3(astralBody, body, sampleTime);
}
//Debug.Log(astralBody.name + " force: " + result);
return(result);
}