LOTInterpolatorCallback.m
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//
// LOTInterpolatorCallback.m
// Lottie
//
// Created by brandon_withrow on 1/5/18.
// Copyright © 2018 Airbnb. All rights reserved.
//
#import "LOTInterpolatorCallback.h"
#import "CGGeometry+LOTAdditions.h"
@implementation LOTFloatInterpolatorCallback
+ (instancetype _Nonnull)withFromFloat:(CGFloat)fromFloat toFloat:(CGFloat)toFloat {
LOTFloatInterpolatorCallback *interpolator = [[self alloc] init];
interpolator.fromFloat = fromFloat;
interpolator.toFloat = toFloat;
return interpolator;
}
- (CGFloat)floatValueForFrame:(CGFloat)currentFrame startKeyframe:(CGFloat)startKeyframe endKeyframe:(CGFloat)endKeyframe interpolatedProgress:(CGFloat)interpolatedProgress startValue:(CGFloat)startValue endValue:(CGFloat)endValue currentValue:(CGFloat)interpolatedValue {
return LOT_RemapValue(self.currentProgress, 0, 1, self.fromFloat, self.toFloat);
}
@end
@implementation LOTPointInterpolatorCallback
+ (instancetype _Nonnull)withFromPoint:(CGPoint)fromPoint toPoint:(CGPoint)toPoint {
LOTPointInterpolatorCallback *interpolator = [[self alloc] init];
interpolator.fromPoint = fromPoint;
interpolator.toPoint = toPoint;
return interpolator;
}
- (CGPoint)pointForFrame:(CGFloat)currentFrame startKeyframe:(CGFloat)startKeyframe endKeyframe:(CGFloat)endKeyframe interpolatedProgress:(CGFloat)interpolatedProgress startPoint:(CGPoint)startPoint endPoint:(CGPoint)endPoint currentPoint:(CGPoint)interpolatedPoint {
return LOT_PointInLine(self.fromPoint, self.toPoint, self.currentProgress);
}
@end
@implementation LOTSizeInterpolatorCallback
+ (instancetype)withFromSize:(CGSize)fromSize toSize:(CGSize)toSize {
LOTSizeInterpolatorCallback *interpolator = [[self alloc] init];
interpolator.fromSize = fromSize;
interpolator.toSize = toSize;
return interpolator;
}
- (CGSize)sizeForFrame:(CGFloat)currentFrame startKeyframe:(CGFloat)startKeyframe endKeyframe:(CGFloat)endKeyframe interpolatedProgress:(CGFloat)interpolatedProgress startSize:(CGSize)startSize endSize:(CGSize)endSize currentSize:(CGSize)interpolatedSize {
CGPoint from = CGPointMake(self.fromSize.width, self.fromSize.height);
CGPoint to = CGPointMake(self.toSize.width, self.toSize.height);
CGPoint returnPoint = LOT_PointInLine(from, to, self.currentProgress);
return CGSizeMake(returnPoint.x, returnPoint.y);
}
@end