BShape

The BShape class provides a powerful means of representing the outline of any shape that can be comprised of lines or Beziér curves.

The BShapeIterator class provides a means for utilizing BShape objects in your own code. You can also use BShape objects to obtain outlines of characters in a BFont by calling BFont::GetGlyphShapes().

Creating a BShape

A BShape is essentially a list of graphic commands, of which there are four types:

• MoveTo. This sets the BShape’s coordinates to a specified point in the shape’s space.

• LineTo. This represents a line from the current point to the next point in the shape.

• BeziérTo. This represents a Beziér curve, connecting the current point to a new point, with other points serving to control the shape of the curve.

• Close. This indicates the end of the shape’s command list.

Functions by the same names are used to add the corresponding commands to the BShape object. For example, to create a BShape that represents two vertical lines, the following code might be used:

BShape shape;
shape.MoveTo(0, 0);
shape.LineTo(0, 100);
shape.MoveTo(5, 0);
shape.LineTo(5, 100);