Singular Manual: texDrawNewtonSubdivision

| #### D.13.6.22 texDrawNewtonSubdivision Procedure from library `tropical.lib` (see tropical_lib). Usage: texDrawNewtonSubdivision(graph[,#]); graph list, # optional list Assume: graph is the output of tropicalCurve Return: string, the texdraw code of the Newton subdivision of the tropical plane curve encoded by graph Note: - the list # may contain optional arguments, of which only one will be considered, namely the first entry of type 'poly'; this entry should be a rational number which specifies the scaling factor to be used; if it is missing, the factor will be computed; the list # may as well be empty - note that lattice points in the Newton subdivision which are black correspond to markings of the marked subdivision, while lattice points in grey are not marked Example:
    LIB "tropical.lib";
    ring r=(0,t),(x,y),dp;
    poly f=x+y+x2y+xy2+1/t*xy;
    list graph=tropicalCurve(f);
    // compute the texdraw code of the Newton subdivision of the tropical curve
    texDrawNewtonSubdivision(graph);
    ==>
    ==>     \begin{texdraw}
    ==>        \drawdim cm  \relunitscale 1
    ==>        \linewd 0.05
    ==>         \move (1 2)
    ==>         \lvec (2 1)
    ==>         \move (2 1)
    ==>         \lvec (1 0)
    ==>         \move (1 0)
    ==>         \lvec (0 1)
    ==>         \move (0 1)
    ==>         \lvec (1 2)
    ==>
    ==>
    ==>         \move (2 1)
    ==>         \lvec (1 1)
    ==>         \move (1 1)
    ==>         \lvec (1 2)
    ==>         \move (1 0)
    ==>         \lvec (1 1)
    ==>         \move (1 1)
    ==>         \lvec (0 1)
    ==>         \move (0 0) \fcir f:0.6 r:0.03
    ==>         \move (0 1) \fcir f:0.6 r:0.03
    ==>         \move (0 2) \fcir f:0.6 r:0.03
    ==>         \move (1 0) \fcir f:0.6 r:0.03
    ==>         \move (1 1) \fcir f:0.6 r:0.03
    ==>         \move (1 2) \fcir f:0.6 r:0.03
    ==>         \move (2 0) \fcir f:0.6 r:0.03
    ==>         \move (2 1) \fcir f:0.6 r:0.03
    ==>         \move (2 2) \fcir f:0.6 r:0.03
    ==>        \move (2 1)
    ==>        \fcir f:0 r:0.04
    ==>        \move (1 2)
    ==>        \fcir f:0 r:0.04
    ==>        \move (1 1)
    ==>        \fcir f:0 r:0.04
    ==>        \move (1 0)
    ==>        \fcir f:0 r:0.04
    ==>        \move (0 1)
    ==>        \fcir f:0 r:0.04
    ==>    \end{texdraw}
    ==>

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