xarc
====

draw a part of an ellipse



Calling Sequence
~~~~~~~~~~~~~~~~


::

    xarc(x,y,w,h,a1,a2)




Arguments
~~~~~~~~~

:x,y,w,h four real values defining a rectangle.
: :a1,a2 real values defining a sector.
:



Description
~~~~~~~~~~~

`xarc` draws a part of an ellipse contained in the rectangle
`(x,y,w,h)` (upper-left point, width, height), and in the sector
defined by the angle `alpha1` and the angle `alpha1+alpha2`. `alpha1`
and `alpha2` are given respectively by `a1/64` degrees and `a2/64`
degrees. This function uses the current graphics color and user
coordinates.



Sample
~~~~~~



Examples
~~~~~~~~


::

    // isoview scaling 
    `plot2d`_(0,0,-1,"031"," ",[-2,-2,2,2])
    `xset`_("color",3)
    xarc(-1,1,2,2,0,90*64)
    xarc(-1.5,1.5,3,3,0,360*64)




See Also
~~~~~~~~


+ `xarcs`_ draw parts of a set of ellipses
+ `xfarc`_ Fill a part of an ellipse
+ `xfarcs`_ Fill parts of a set of ellipses


.. _xfarc: xfarc.html
.. _xfarcs: xfarcs.html
.. _xarcs: xarcs.html