# Legacy Document

Important: The information in this document is obsolete and should not be used for new development.

Inside Macintosh: Imaging With QuickDraw /
Chapter 3 - QuickDraw Drawing / QuickDraw Drawing Reference
Routines / Drawing Arcs and Wedges

### FrameArc

To draw an arc of the oval that fits inside a rectangle, use the `FrameArc` procedure.

```PROCEDURE FrameArc (r: Rect; startAngle,arcAngle:\xDDInteger);
```
`r`
The rectangle that defines an oval's boundaries.
`startAngle`

The angle indicating the start of the arc.
`arcAngle`
The angle indicating the arc's extent.
##### DESCRIPTION
Using the pattern, pattern mode, and size of the graphics pen for the current graphics port, the `FrameArc` procedure draws an arc of the oval bounded by the rectangle that you specify in the `r` parameter. Use the `startAngle` parameter to specify where the arc begins as modulo 360. Use the `arcAngle` parameter to specify how many degrees the arc covers. Specify whether the angles are in positive or negative degrees; a positive angle goes clockwise, while a negative angle goes counterclockwise. Zero degrees is at 12 o'clock high, 90 (or -270) is at 3 o'clock, 180 (or -180) is at 6 o'clock, and 270 (or -90) is at 9 o'clock. Measure other angles relative to the bounding rectangle.\xDD

A line from the center of the rectangle through its upper-right corner is at 45, even if the rectangle isn't square; a line through the lower-right corner is at 135, and so on, as shown in Figure 3-20.

The arc is as wide as the pen width and as tall as the pen height. The pen location does not change.

##### SPECIAL CONSIDERATIONS
The `FrameArc` procedure differs from other QuickDraw procedures that frame shapes in that the arc is not mathematically added to the boundary of a region that's open and being formed.

The `FrameArc` procedure may move or purge memory blocks in the application heap. Your application should not call this procedure at interrupt time.