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44 lines
1.4 KiB
Objective-C
44 lines
1.4 KiB
Objective-C
/**
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Copyright (c) 2014-present, Facebook, Inc.
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All rights reserved.
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This source code is licensed under the BSD-style license found in the
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LICENSE file in the root directory of this source tree. An additional grant
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of patent rights can be found in the PATENTS file in the same directory.
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*/
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#import <QuartzCore/CAAnimation.h>
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#import "POPDefines.h"
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#import "POPSpringAnimation.h"
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/**
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@abstract The current drag coefficient.
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@discussion A value greater than 1.0 indicates Simulator slow-motion animations are enabled. Defaults to 1.0.
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*/
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extern CGFloat POPAnimationDragCoefficient();
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@interface CAAnimation (POPAnimationExtras)
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/**
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@abstract Apply the current drag coefficient to animation speed.
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@discussion Convenience utility to respect Simulator slow-motion animation settings.
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*/
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- (void)pop_applyDragCoefficient;
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@end
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@interface POPSpringAnimation (POPAnimationExtras)
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/**
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@abstract Converts from spring bounciness and speed to tension, friction and mass dynamics values.
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*/
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+ (void)convertBounciness:(CGFloat)bounciness speed:(CGFloat)speed toTension:(CGFloat *)outTension friction:(CGFloat *)outFriction mass:(CGFloat *)outMass;
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/**
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@abstract Converts from dynamics tension, friction and mass to spring bounciness and speed values.
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*/
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+ (void)convertTension:(CGFloat)tension friction:(CGFloat)friction toBounciness:(CGFloat *)outBounciness speed:(CGFloat *)outSpeed;
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@end
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