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→Points, Coordinates and Pixels
== Points, Coordinates and Pixels ==
<google>ADSDAQBOX_FLOW</google>
The Quartz 2D API functions work on the basis of points. These are essentially the x and y coordinates of a two dimensional coordinate system on the device screen with 0, 0 representing the top left hand corner of the display. These coordinates are stored in the form of CGFloat variables.
