xarc draw a part of an ellipse

## Syntax

    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.

## Examples

    // isoview scaling
    plot2d(0,0,-1,"031"," ",[-2,-2,2,2])
    xarc(-1,1,2,2,0,90*64)
    xarc(-1.5,1.5,3,3,0,360*64)
    gca().children(1:2).foreground = color("green");

plot2d(0,0,-1,"031"," ",[-2,-2,2,2]) xarc(-1,1,2,2,0,90*64) xarc(-1.5,1.5,3,3,0,360*64) gca().children(1:2).foreground = color("green");

      rect=[-1,-1,1,1]
      plot2d(0,0,0,rect=rect,frameflag=3,axesflag=5)
      xrpoly([0,0],3,1)
      xarc(-1,1,2,2,0,64*360)
      xarc(-1,1,2,2,0,64*360)
      xstring(1,0.1,'A')//label A
      xstring(-0.5,0.9,'B')//label B
      xstring(-0.5,-1,'C')//label C

rect=[-1,-1,1,1] plot2d(0,0,0,rect=rect,frameflag=3,axesflag=5) xrpoly([0,0],3,1) xarc(-1,1,2,2,0,64*360) xarc(-1,1,2,2,0,64*360) xstring(1,0.1,'A')//label A xstring(-0.5,0.9,'B')//label B xstring(-0.5,-1,'C')//label C

## See also

- xarcs
- xfarc
- xfarcs