@interface ARCoachingBasicSpring : NSObject { float _target; float _velocity; float _position; } @property (nonatomic) float tension; @property (nonatomic) float friction; @property (nonatomic) float input; @property (readonly, nonatomic) float output; - (id)initWithTension:(float)a0 friction:(float)a1; - (void)setInput:(float)a0 velocity:(float)a1; - (void)stepWithDeltaTime:(double)a0; @end