KMPMenuItem.cs

using System.Collections.Generic;
using UnityEngine;

namespace KMP
{
    [KSPAddon(KSPAddon.Startup.MainMenu, false)] //Start at mainmenu, every time.
    public class KMPMenuItem : MonoBehaviour
    {
        private MainMenu mainMenu;

        public void Awake()
        {
            Log.Debug("MenuItemLoader is awake.");
            GameEvents.onGameSceneLoadRequested.Add(GameSceneLoadRequested);

            //Grab the MainMenu object.
            mainMenu = (MainMenu)FindObjectOfType(typeof(MainMenu));
            //Clone a menu item and change it for our needs.
            GameObject clone = (GameObject)GameObject.Instantiate(mainMenu.scenariosBtn.gameObject);
            clone.name = "KMP MenuItem";
            clone.transform.SetParent(mainMenu.scenariosBtn.transform.parent);
            clone.transform.localPosition = new Vector3(-0.2621014f, -0.1907118f, 1.004246f);
            clone.transform.localRotation = mainMenu.scenariosBtn.transform.localRotation;
            clone.transform.localScale = mainMenu.scenariosBtn.transform.localScale;
            clone.GetComponent<TextMesh>().text = "KerbalMultiPlayer";
            //Add our renderer to envLogic's list of renderers, for the fade in effect.
            List<MeshRenderer> renderers = new List<MeshRenderer>(mainMenu.envLogic.uiRenderers);
            renderers.Add(clone.GetComponent<MeshRenderer>());
            mainMenu.envLogic.uiRenderers = renderers.ToArray();
            //Get the TextButton3D component and set a onPressed callback
            TextButton3D multiPlayerBtn = clone.GetComponent<TextButton3D>();
            multiPlayerBtn.onPressed = new Callback(KMPButtonPressed);

            //Make a new MenuStage to move the camera.
            GameObject stage3 = new GameObject("stage3");
            stage3.transform.position = new Vector3(18, 0, 4);
            GameObject stage3camstart = new GameObject("stage3camstart");
            stage3camstart.transform.position = new Vector3(19, 0, 5);
            MainMenuEnvLogic.MenuStage stage = new MainMenuEnvLogic.MenuStage();
            stage.initialPoint = stage3camstart.transform;
            stage.targetPoint = stage3.transform;

            //Add our new stage to the menu stages
            List<MainMenuEnvLogic.MenuStage> stages = new List<MainMenuEnvLogic.MenuStage>(mainMenu.envLogic.camPivots);
            if (stages.Count < 3)
            {
                stages.Add(stage);
            }
            mainMenu.envLogic.camPivots = stages.ToArray();
        }

        private void GameSceneLoadRequested(GameScenes scene)
        {
            if (scene != GameScenes.MAINMENU)
            {
                GameEvents.onGameSceneLoadRequested.Remove(GameSceneLoadRequested);
                mainMenu.envLogic.GoToStage(0);
            }
        }

        private void Start()
        {
            if (KMPManager.showConnectionWindow)
            {
                mainMenu.envLogic.GoToStage(2);
            }
        }

        private void KMPButtonPressed()
        {
            mainMenu.envLogic.GoToStage(2); //our new stage.
            Invoke("ShowKMPWindow", 1f); //Show the window in 2 seconds to wait for the camera to move.
        }

        private void ShowKMPWindow()
        {
            KMPManager.showConnectionWindow = true;
        }
    }
}