Vertices - abstract base class for graphics defined by a set of
coordinate pairs
#include <Unidraw/Graphic/verts.h>
Vertices is an abstract base class for graphics such as polygons
and splines whose geometry is specified by a set of coordinate pairs. The
Vertices class supports vertex-related operations common to all such
graphical objects and also supports extent caching.
- Vertices(Graphic*
= nil)
- Vertices(Coord*
x, Coord* y, int count, Graphic* = nil)
- The constructors are protected to disallow instantiation of the abstract
class. Subclasses can pass a set of vertices to copy into internal storage
and an optional graphic from which to obtain an initial set of graphics
state. Vertices itself stores no additional graphics state over that in
the Graphic base class.
- void
s_getExtent(
- float&,
float&, float&, float&, float&, Graphic*
- )
- void
f_getExtent(
-
float&, float&, float&, float&, float&,
Graphic*
- )
-
Helper functions that return extent information based on the bounding box
that the vertices define. s_getExtent returns an extent that accounts for
the width of a brush, as would be necessary if the vertices defined a
stroked path, while f_getExtent assumes that the vertices define the
graphic's extremities, as would be the case if the vertices defined a
filled path. These operations cache the extent they compute
initially.