CGFloat data types sound so similar you might think they were identical, but they aren't:
CGFloat is flexible in that its precision adapts to the type of device it's running on, whereas
Float is always a fixed precision. Thus, you never lose precision converting from
CGFloat, whereas you might going the other way.
To convert, just use the
CGFloat constructor, like this:
let myCGFloat = CGFloat(myFloat)
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