draw

var Command = &command.Command{
	Usage: `draw [--tree <tree>]
	[--scale <value>]
	[--step <value>] [--time <number>] [--tick <tick-value>]
	[--nonodes]
	[-o|--output <out-prefix>]
	<project-file>`,
	Short: "draw project trees as SVG files",
	Long: `
Command draw reads a PhyGeo project and draws the trees into a SVG-encoded
file.

The argument of the command is the name of the project file.

By default, the time scale is set in million years. To change the scale, use
the flag --scale with the value in years of the scale.

If the --time flag is defied, then a gray box of the indicated size, in
the scale units, will be printed as background.

By default, 10 pixel units will be used per scale unit; use the flag --step to
define a different value (it can have decimal points).

By default, all trees in the project will be drawn. If the flag --tree is set,
only the indicated tree will be printed.

By default, node IDs will be drawn. If the flag --nonodes is given, then it
will draw the tree without node IDs.

By default, a timescale with ticks every scale unit will be added at the
bottom of the drawing. Use the flag --tick to define the tick lines, using the
following format: "<min-tick>,<max-tick>,<label-tick>", in which min-tick
indicates minor ticks, max-tick indicates major ticks, and label-tick the
ticks that will be labeled; for example, the default is "1,5,5" which means
that small ticks will be added each scale unit, major ticks will be added
every 5 scale units, and labels will be added every 5 scale units.

By default, the names of the trees will be used as the output file names. Use
the flag -o, or --output, to define a prefix for the resulting files.
	`,
	SetFlags: setFlags,
	Run:      run,
}