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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}
==>