Variable-Width Bezier Splines in R

This report describes support for a new type of variable-width line
in the 'vwline' package for R that
is based on Bezier curves. There is also a new function for
specifying the width of a variable-width line based on Bezier curves and
there is a new linejoin and lineend style,
called "extend", that is available
when both the line and the width of the line
are based on Bezier curves. This report also introduces
a small 'gridBezier' package for drawing Bezier curves in R.