把线段改为射线画图公式

各位好，能不能把画出来的线向右侧无限延长呢？ {T1 1.00 999.00 10.00 T2 1.00 999.00 9.00} D1:T1/10,NODRAW; D2:T2/10,NODRAW; D3:=T1/10;D4:=T1/10; DRAWLINE(L=D1,D1 ,L=D2 ,D2,1 ),COLORRED; DRAWLINE(H=D1,D1 ,H=D2 ,D2,1 ),COLORBLUE; DRAWLINE(L=D1,D1 ,L=D3 ,D3,1 ),COLORRED; DRAWLINE(L=D3,D3 ,L=D4 ,D4,1 ),COLORRED;

爱约股解答：

{T1 1.00  999.00   10.00

T2  1.00  

999.00   9.00}

D1:T1/10,NODRAW;

D2:T2/10,NODRAW;

D3:=T1/10;D4:=T1/10;

DRAWLINE(L=D1,D1 

,L=D2 ,L,1 ),COLORRED;

DRAWLINE(H=D1,D1 ,H=D2 ,H,1 

),COLORBLUE;

DRAWLINE(L=D1,D1 ,L=D3 ,L,1 ),COLORRED;

DRAWLINE(L=D3,D3 

,L=D4 ,L,1 ),COLORRED;