ButtonNeumorphism-NeuButtonBackgroundView.swift

struct NeuButtonBackgroundView : View  {
    let cornerRadius : CGFloat
    @Binding var  opacity : CGFloat
    @Binding var  opacityOp : CGFloat
    @Binding var  shadowRadiusXY : CGFloat
    
    var body: some View {
        ZStack {
            //Button shape and color
            RoundedRectangle(cornerRadius: cornerRadius)
                .fill(Color(Colors.mainColor))
            //Button's dark edge (top left)
            RoundedRectangle(cornerRadius: cornerRadius)
                .stroke(Color(Colors.darkShadow).opacity(opacityOp), lineWidth: 2)
                .mask(RoundedRectangle(cornerRadius: cornerRadius).fill(LinearGradient(colors:[Color(Colors.darkShadow).opacity(opacityOp), Color.clear], startPoint: .top, endPoint: .bottom)))
            //Button's inner dark shadow (top left)
            RoundedRectangle(cornerRadius: cornerRadius)
                .stroke(Color(Colors.darkShadow), lineWidth: 2)
                .blur(radius: 3)
                .offset(x: 1, y: 1)
                .mask(RoundedRectangle(cornerRadius: cornerRadius).fill(LinearGradient(colors: [Color(Colors.darkShadow).opacity(opacityOp), Color.clear], startPoint: .top, endPoint: .bottom)))
            //Button's inner light edge (bottom right)
            RoundedRectangle(cornerRadius: cornerRadius)
                .stroke(Color(Colors.lightShadow).opacity(opacityOp), lineWidth: 2)
                .mask(RoundedRectangle(cornerRadius: cornerRadius).fill(LinearGradient(colors: [Color.clear, Color(Colors.lightShadow).opacity(opacityOp)], startPoint: .top, endPoint: .bottom)))
        }
        //Button's outer light shadow (top left)
        .shadow(color: Color(Colors.lightShadow).opacity(opacity), radius: shadowRadiusXY, x: -shadowRadiusXY, y: -shadowRadiusXY)
        //Button's outer dark shadow (bottom right)
        .shadow(color: Color(Colors.darkShadow).opacity(opacity), radius: shadowRadiusXY, x: shadowRadiusXY, y: shadowRadiusXY)
    }
    
}