CNT3D plots a simple 3-d contour of equally spaced points with no hidden line removal. (see CNT3DX) CNT3D calls CNT3DX using default axis parameters to simplify calling procedure.
CALL CNT3D(d,ndx,ndz,nx,nz,a,b,xh,yh,zh,nl,as,ae,ie,iflag,iax, <xt,nxt,xs,xe,yt,nyt,zt,nzt,zs,ze,<dm,dx<,ic>,l>>>) See CNT3DX for parameter description. (iax is limited to a single digit value)