| LbI 0:{EG}:A”XA”:B”YA”:C”CA”:D”1/RA”:E”1/RB”:F”DKA”:G”DKB” LbI 1:{HOR}:H”DKI”:O”DL”:R”DR”:H>G=>Goto3⊿ P=(E-D)÷Abs(H-F):Q= Abs(H-F):I=P*Q:T=D+I J=C+(I+2D)*Q*90÷Л▲ M=C+(I÷4+2D)*Q*45÷(2Л):N=C+(3I÷4+2D)*Q*135÷(2Л) K=C+(I÷2+2D)*Q*45÷Л X=A+Q(CosC+4(CosM+CosN)+2CosK+CosJ)÷12▲ Y=B+Q(SinC+4(SinM+SinN)+2SinK+SinJ)÷12▲ U”XL”=X+OCos(J-90) ▲ V”YL”=Y+OSin(J-90) ▲ W”XR”=X+RCos(J+90) ▲ Z”YR”=Y+RSin(J+90) ▲ A=X:B=Y:C=J:D=T:F=H: Goto1 LbI 3: A=X:B=Y: D=E:F=G: C=J:Goto 0 “XA" ”YA“为曲线起点坐标，“CA”为起点切线方位角，“1÷RA”、“1÷RB”为曲线起、止点的曲率半径，左偏为负，右偏为正。“DKA” “DKB”为曲线其止里程，缓和曲线要分开算。“DKI”为所求里程。“DL” “DR”为左右边桩距离。“JR”=90 |
|【路桥隧】
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