Modifies the origin of the ellispse according to the specified mode:

:center  - specifies the location of the ellipse as
           the center of the shape. (Default).
:radius  - similar to center, but the width and height parameters to
           ellipse specify the radius of the ellipse, rather than the
           diameter.
:corner  - draws the shape from the upper-left corner of its bounding
           box.
:corners - uses the four parameters to ellipse to set two opposing
           corners of the ellipse's bounding box.

Draws all geometry with jagged (aliased) edges. Must be called inside
:settings handler.

Modifies the location from which rectangles draw. The default mode
is :corner. Available modes are:


:corner  - Specifies the location to be the upper left corner of the
           shape and uses the third and fourth parameters of rect to
           specify the width and height.

:corners - Uses the first and second parameters of rect to set the
           location of one corner and uses the third and fourth
           parameters to set the opposite corner.

:center  - Draws the image from its center point and uses the third
           and forth parameters of rect to specify the image's width
           and height.

:radius  - Draws the image from its center point and uses the third
           and forth parameters of rect() to specify half of the
           image's width and height.

Draws all geometry with smooth (anti-aliased) edges. This will slow
down the frame rate of the application, but will enhance the visual
refinement.

Must be called inside :settings handler.

The level parameter (int) increases the level of smoothness with the
P2D and P3D renderers. This is the level of over sampling applied to
the graphics buffer. The value '2' will double the rendering size
before scaling it down to the display size. This is called '2x
anti-aliasing.' The value 4 is used for 4x anti-aliasing and 8 is
specified for 8x anti-aliasing. If level is set to 0, it will disable
all smoothing; it's the equivalent of the function noSmooth().
The maximum anti-aliasing level is determined by the hardware of the
machine that is running the software.

Note that smooth will also improve image quality of resized images.

Sets the style for rendering line endings. These ends are either
squared, extended, or rounded and specified with the corresponding
parameters :square, :project, and :round. The default cap is :round.

Sets the style of the joints which connect line
segments. These joints are either mitered, beveled, or rounded and
specified with the corresponding parameters :miter, :bevel, and
:round. The default joint is :miter.

This function is not available with the :p2d, :p3d, or :opengl
renderers.

Sets the width of the stroke used for lines, points, and the border
around shapes. All widths are set in units of pixels.