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December 31, 2015 06:39
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Transition a CGRect to another CGRect by the (CGFloat) ratio provided.
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+ (CGFloat)transitionFloat:(CGFloat)float1 toFloat:(CGFloat)float2 byRatio:(CGFloat)ratio | |
{ | |
return ( ratio * (float2 - float1) ); | |
} | |
+ (CGRect)transitionRect:(CGRect)rect1 toRect:(CGRect)rect2 byRatio:(CGFloat)ratio | |
{ | |
if (CGRectIsNull(rect1) || CGRectIsNull(rect2)) { | |
return CGRectZero; | |
} | |
return CGRectMake( | |
rect1.origin.x + [self transitionFloat:rect1.origin.x toFloat:rect2.origin.x byRatio:ratio], | |
rect1.origin.y + [self transitionFloat:rect1.origin.y toFloat:rect2.origin.y byRatio:ratio], | |
rect1.size.width + [self transitionFloat:rect1.size.width toFloat:rect2.size.width byRatio:ratio], | |
rect1.size.height + [self transitionFloat:rect1.size.height toFloat:rect2.size.height byRatio:ratio]); | |
} |
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