Program sfbox | Draw a balloon-style label.
[SYNOPSIS]
sfbox lab_color=VP_WHITE lab_fat=0 pscale=1. pointer=y reverse=n lat=0. long=90. angle=0. x0=0. y0=0. scale0=1. xt=2. yt=0. x_oval=0. y_oval=0. boxit=y length= scalet= size=.25 font=VP_NO_CHANGE label= > out.vpl
[COMMENTS]
May 2015 program of the month:
http://ahay.org/blog/2015/05/01/program-of-the-month-sfbox/

[PARAMETERS]
float   | angle | =0. |   | 	longitude of floating label in 3-D 
bool    | boxit | =y |  [y/n] | 	if y, create a box around text 
int     | font | =VP_NO_CHANGE |   | 	text font 
int     | lab_color | =VP_WHITE |   | 	label color 
int     | lab_fat | =0 |   | 	label fatness 
string  | label | = |   | 	text for label 
float   | lat | =0. |   | 	latitude of viewpoint in 3-D 
float   | length | = |   | 	normalization for xt and yt 
float   | long | =90. |   | 	longitude of viewpoint in 3-D 
bool    | pointer | =y |  [y/n] | 	if y, create arrow pointer 
float   | pscale | =1. |   | 	scale factor for width of pointer 
bool    | reverse | =n |  [y/n] | 	if reverse 
float   | scale0 | =1. |   | 	scale factor for x0 and y0 
float   | scalet | = |   | 	( scalet scale factor for xt and yt (if length is not set) )
float   | size | =.25 |   | 	text height in inches 
float   | x0 | =0. |   | 	x position of the pointer tip 
float   | x_oval | =0. |   | 	x size of the oval around pointer 
float   | xt | =2. |   | 	relative position of text in x 
float   | y0 | =0. |   | 	y position of the pointer tip 
float   | y_oval | =0. |   | 	y size of the oval around pointer 
float   | yt | =0. |   | 	relative position of text in y 
[DIRECTORY]
plot/main
