On 4 Jul 2011, at 7:17 AM, Dale Satterfield wrote:
> Well, hopefully that code is correct since it is the unmodified code from the
> book.
The code you are looking to is intended as an example of how to prepare a Mac
OS X framework, not as a graphics tutorial. The source had to fit into a
reasonably-sized book, and that entailed a sacrifice in drawing performance.
In particular, I scaled the drawing view to make the graph fit. As the source
data's aspect ratio departs from 1, lines perpendicular to the compressed axis
will be compressed to less than a full pixel (actually, point) width, and get
antialiased to gray.
You should find other examples.
— F
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