public int AddForce(NForce F)//添加荷载，返回荷载在Loads中从零开始的索引
{
if (F.NodeIndex < 0 || F.NodeIndex >= NCount)
{
return(-1);
}
Loads.Add(F);
return(FCount - 1);
}
private void DrawAndAddForce(PointF spf, PointF epf, bool IsGridPointF = false)
{
if (spf == epf)
{
return;
}
int NI = TS.GetNodeIndex(ToGridPointF(spf));
if (NI == -1)
{
return;
}
if (!IsGridPointF)
{
spf = ToGridPointF(spf);
epf = ToGridPointF(epf);
}
NForce nf = new NForce(spf, epf, NI, UnitSize);
int FI = TS.AddForce(nf);
DrawForce(spf, epf, FI + 1, nf.Size, true);
}