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- "Rounded Rectangles with the BGI" -- Jeff Duntemann
- Drawing rectangles with rounded corners using the BGI is simplified by the
- BGI's facility for querying the coordinates of an arc's endpoints. By drawing
- four arcs as corners and immediately querying the arc endpoints, connecting
- the arc endpoints with straight lines to complete the figure involves no
- additional math.
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- Borland Graphics Interface BGI rectangles windows rounded corners