各位老师好，我想问下flac2D中， buff(ibuf) = x(i1,j1)，buff(ibuf) = y(i1,j1)， ii = imem(ap+kapi1)中X,Y和kapi1怎么理解啊，它是fish中的默认变量？我在帮助中查不到啊，谢谢
ibuf = 0
loop nn (1,numWalls)
setIJ
ibuf = ibuf + 1
buff(ibuf) = x(i1,j1)
ibuf = ibuf + 1
buff(ibuf) = y(i1,j1)
ibuf = ibuf + 1
buff(ibuf) = x(i2,j2)
ibuf = ibuf + 1
buff(ibuf) = y(i2,j2)
command
apply xforce=1e-10 yforce=1e-10 i=i1 j=j1
endCommand
endLoop
ap = app_pnt ; set up easy access to apply-list pointers
loop while ap # 0
ii = imem(ap+kapi1)
jj = imem(ap+kapj1)
appnt(ii,jj) = ap
ap = imem(ap)
endLoop