Variable passing, the modifier file, File2

/*
I want this file(file2) to revvieve edge input results of file1, modify them as desired then send them along to file 3 (charts) for realtime feedback. how do I pass variables into other variables as well across files while keeping the information live and modifiable?
*/
import PlaygroundSupport
import Foundation
import SwiftUI


import UniformTypeIdentifiers

struct sliderHalf: View {
    @State private var showingPopover = false
    @State private var edge = 50.0
    @State private var math = 50.0
    @State private var physics = 50.0
    @State private var isEditing = false
    var body: some View {

            VStack(alignment: .leading) {
                Divider()

                VStack(alignment: .leading) {
                    Button {
                        showingPopover = true
                    } label: {
                        ZStack(alignment: .leading){
                            RoundedRectangle(cornerRadius: 4.0)
                                .aspectRatio(4.5, contentMode: ContentMode.fit)
                                .shadow(radius: 3)
                                .foregroundColor(.blue)
                            HStack(alignment: .center){
                                Image("Hornet").resizable()
                                    .aspectRatio(contentMode: .fit).padding(.leading, 2).padding(.trailing, 2)
                                    .frame(
                                        maxWidth: 50,
                                        maxHeight: 50, alignment: .leading).shadow(radius: 3)
                                Text("Lab Math")
                            }.foregroundColor(.white)

                            //  Label("Overlay HUD", systemimage: "cloud")
                            //        .foregroundColor(.white)
                                .padding(.leading, 2)




                        }
                        .buttonStyle(.plain)
                        .popover(isPresented: $showingPopover) {
                            VStack(alignment: .leading){
                                Text("Crystalline")
                                    .font(.subheadline)

                                Text("Proportional")
                                    .font(.subheadline)

                                Text("Congruent")
                                    .font(.subheadline)

                                Divider()
                                Text("Edge")
                                    .font(.subheadline)

                                VStack(alignment: .center){
                                    Slider(
                                        value: $edge,
                                        in: 0...100,
                                        onEditingChanged: { editing in
                                            isEditing = editing
                                        }
                                    )
                                    Text("\(edge)")
                                        .foregroundColor(isEditing ? .yellow : .white)
                                }


                                Text("Math")
                                    .font(.subheadline)

                                VStack(alignment: .center){
                                    Slider(
                                        value: $math,
                                        in: 0...100,
                                        onEditingChanged: { editing in
                                            isEditing = editing
                                        }
                                    )
                                    Text("\(math)")
                                        .foregroundColor(isEditing ? .yellow : .white)
                                }
                                Text("Physics")
                                    .font(.subheadline)

                                VStack(alignment: .center){
                                    Slider(
                                        value: $physics,
                                        in: 0...100,
                                        onEditingChanged: { editing in
                                            isEditing = editing
                                        }
                                    )
                                    Text("\(physics)")
                                        .foregroundColor(isEditing ? .yellow : .white)
                                }
                            } .frame(width: 300, height: 400) .shadow(radius: 3)
                                .padding(5)
                                .background(Color.blue.opacity(1.0))
                            //  .padding()
                        } .foregroundColor(.white)
                    } .frame(
                        maxWidth: 200,
                        maxHeight: .infinity, alignment: .topLeading).padding(8)
                }
                HStack(alignment: .top){
                    VStack(alignment: .leading){
                        Text("Legend")
                            .italic()

                        Divider().frame(width:100)
                            VStack(alignment: .leading){
                                Text("File 1")
                                    .font(.subheadline)
                                VStack(alignment: .leading){
                                RoundedRectangle(cornerRadius: 2.0)
                                    .aspectRatio(1, contentMode: ContentMode.fill)
                                    .shadow(radius: 3)
                                    .shadow(radius: 3)
                                    .foregroundColor(.indigo)
                            }.frame(maxWidth: 10, maxHeight: 10, alignment: .topLeading)
                        }
                        Text("File 2")
                            .font(.subheadline)
                        VStack(alignment: .leading){
                            VStack(alignment: .leading){
                                RoundedRectangle(cornerRadius: 2.0)
                                    .aspectRatio(1, contentMode: ContentMode.fill)
                                    .shadow(radius: 3)
                                .shadow(radius: 3)
                                    .foregroundColor(.brown)
                            }.frame(maxWidth: 10, maxHeight: 10, alignment: .topLeading)
                        }
                        Text("File 3")
                            .font(.subheadline)
                        VStack(alignment: .leading){
                            VStack(alignment: .leading){
                                RoundedRectangle(cornerRadius: 2.0)
                                    .aspectRatio(1, contentMode: ContentMode.fill)
                                    .shadow(radius: 3)
                                .shadow(radius: 3)
                                    .foregroundColor(.black)
                            }.frame(maxWidth: 10, maxHeight: 10, alignment: .topLeading)
                        }
                    }
                }.padding()
            }.frame(maxWidth: .infinity, maxHeight: .infinity, alignment: .topLeading).background(Color.brown)
    }
}