SAM2-Demo/Ripple/RippleViewModifier.swift

//
//  RippleViewModifier.swift
//  HuggingChat-Mac
//
//  Created by Cyril Zakka on 8/28/24.
//

import SwiftUI

struct RippleEffect<T: Equatable>: ViewModifier {
    
    var origin: CGPoint
    var trigger: T
    var amplitude: Double
    var frequency: Double
    var decay: Double
    var speed: Double

    init(at origin: CGPoint, trigger: T, amplitude: Double = 12, frequency: Double = 15, decay: Double = 8, speed: Double = 1200) {
        self.origin = origin
        self.trigger = trigger
        self.amplitude = amplitude
        self.frequency = frequency
        self.decay = decay
        self.speed = speed
    }

    func body(content: Content) -> some View {
        let origin = origin
        let duration = duration
        let amplitude = amplitude
        let frequency = frequency
        let decay = decay
        let speed = speed

        content.keyframeAnimator(
            initialValue: 0,
            trigger: trigger
        ) { view, elapsedTime in
            view.modifier(RippleModifier(
                origin: origin,
                elapsedTime: elapsedTime,
                duration: duration,
                amplitude: amplitude,
                frequency: frequency,
                decay: decay,
                speed: speed
            ))
        } keyframes: { _ in
            MoveKeyframe(0)
            LinearKeyframe(duration, duration: duration)
        }
    }

    var duration: TimeInterval { 3 }
}