KerbalGreenscreen - Source Code

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using UnityEngine;
using KSP;
using System.Text.RegularExpressions;

namespace KerbalGreenscreen
{
    [KSPAddon(KSPAddon.Startup.Flight, false)]
    public class greenscreen : MonoBehaviour
    {
        private Camera[] cameras;
        private float screenDistance = 100;
        private float[] greenscreenRGB;
        private bool greenscreenActivated = false;
        private float[] defaultFarClipPlane;
        private CameraClearFlags[] defaultCameraClearFlags;

        public void Start()
        {
            cameras = new Camera[3];
            cameras[0] = GameObject.Find("Camera 00").GetComponent<Camera>();
            cameras[1] = GameObject.Find("Camera 01").GetComponent<Camera>();
            cameras[2] = GameObject.Find("Camera ScaledSpace").GetComponent<Camera>();
            defaultFarClipPlane = new float[2];
            defaultCameraClearFlags = new CameraClearFlags[2];
            defaultFarClipPlane[0] = cameras[0].farClipPlane;
            defaultFarClipPlane[1] = cameras[1].farClipPlane;
            defaultCameraClearFlags[0] = cameras[0].clearFlags;
            defaultCameraClearFlags[1] = cameras[1].clearFlags;
            greenscreenRGB = new float[3];
            greenscreenRGB[0] = 255;
            SgreenscreenRGB = new string[3];
            SgreenscreenRGB[0] = "0";
            SgreenscreenRGB[1] = "255";
            SgreenscreenRGB[2] = "0";
            initStyles();
        }

        public void Update()
        {
            if (Input.GetKey(KeyCode.LeftAlt) && Input.GetKeyDown(KeyCode.Backslash))
            {
                windowActive = !windowActive;
            }

            if (greenscreenActivated && !MapView.MapIsEnabled)
            {

                if (screenDistance < defaultFarClipPlane[0])
                {
                    cameras[0].farClipPlane = screenDistance;
                    cameras[1].farClipPlane = screenDistance;
                    cameras[0].clearFlags = CameraClearFlags.SolidColor;
                    cameras[1].clearFlags = CameraClearFlags.SolidColor;
                }
                else
                {
                    cameras[0].farClipPlane = defaultFarClipPlane[0];
                    cameras[1].farClipPlane = screenDistance;
                    cameras[0].clearFlags = defaultCameraClearFlags[0];
                    cameras[1].clearFlags = CameraClearFlags.SolidColor;
                }

                cameras[2].enabled = false;

                cameras[0].backgroundColor = new Color(greenscreenRGB[0] / 255, greenscreenRGB[1] / 255, greenscreenRGB[2] / 255, 1);
                cameras[1].backgroundColor = new Color(greenscreenRGB[0] / 255, greenscreenRGB[1] / 255, greenscreenRGB[2] / 255, 1);
            }
            else
            {
                cameras[0].farClipPlane = defaultFarClipPlane[0];
                cameras[1].farClipPlane = defaultFarClipPlane[1];
                cameras[0].clearFlags = defaultCameraClearFlags[0];
                cameras[1].clearFlags = defaultCameraClearFlags[1];
                cameras[2].enabled = true;
            }

            for (int i = 0; i < 3; i++)
            {
                if (SgreenscreenRGB[i] != "") greenscreenRGB[i] = float.Parse(SgreenscreenRGB[i]);
                else greenscreenRGB[i] = 0;

                if (greenscreenRGB[i] > 255)
                {
                    greenscreenRGB[i] = 255;
                    SgreenscreenRGB[i] = "255";
                }
                if (greenscreenRGB[i] < 0)
                {
                    greenscreenRGB[i] = 0;
                    SgreenscreenRGB[i] = "0";
                }
            }

            if (greenscreenDistance != "") screenDistance = int.Parse(greenscreenDistance);
            else screenDistance = 0;
            if (screenDistance > 10000)
            {
                screenDistance = 10000;
                greenscreenDistance = "10000";
            }
        }

        private Rect windowRect = new Rect(8, 50, 0, 0);
        private GUIStyle windowStyle, labelStyle, titleLabelStyle, textFieldStyle, boxStyle, toggleStyle;
        private string greenscreenDistance = "100";
        private string[] SgreenscreenRGB;
        private bool windowActive = false;

        void OnGUI()
        {
            if (windowActive && !MapView.MapIsEnabled) windowRect = GUILayout.Window(13, windowRect, WindowFunction, "Greenscreen Settings", windowStyle);
        }

        void WindowFunction(int windowID)
        {
            greenscreenActivated = GUILayout.Toggle(greenscreenActivated, "Enable Greenscreen", HighLogic.Skin.toggle);
            GUILayout.BeginVertical(boxStyle);
            GUILayout.Label("Distance", titleLabelStyle);
            GUILayout.BeginHorizontal("", GUIStyle.none);
            greenscreenDistance = GUILayout.TextField(greenscreenDistance, 5, HighLogic.Skin.textField);
            greenscreenDistance = Regex.Replace(greenscreenDistance, "[^0-9]", "");
            GUILayout.EndHorizontal();
            GUILayout.EndVertical();

            GUILayout.BeginVertical(boxStyle);
            GUILayout.Label("Colour", titleLabelStyle);
            GUILayout.BeginHorizontal("", GUIStyle.none);
            GUILayout.Label("R:", labelStyle);
            SgreenscreenRGB[0] = GUILayout.TextField(SgreenscreenRGB[0],3,textFieldStyle);
            SgreenscreenRGB[0] = Regex.Replace(SgreenscreenRGB[0], "[^0-9]", "");
            GUILayout.Label("G:", labelStyle);
            SgreenscreenRGB[1] = GUILayout.TextField(SgreenscreenRGB[1],3,textFieldStyle);
            SgreenscreenRGB[1] = Regex.Replace(SgreenscreenRGB[1], "[^0-9]", "");
            GUILayout.Label("B:", labelStyle);
            SgreenscreenRGB[2] = GUILayout.TextField(SgreenscreenRGB[2],3,textFieldStyle);
            SgreenscreenRGB[2] = Regex.Replace(SgreenscreenRGB[2], "[^0-9]", "");
            GUILayout.EndHorizontal();
            GUILayout.EndVertical();

            GUI.DragWindow();
        }

        void initStyles()
        {
            windowStyle = new GUIStyle(HighLogic.Skin.window);
            windowStyle.fixedWidth = 210;
            windowStyle.fixedHeight = 180;
            labelStyle = new GUIStyle(HighLogic.Skin.label);
            titleLabelStyle = new GUIStyle(HighLogic.Skin.label);
            titleLabelStyle.stretchWidth = true;
            titleLabelStyle.alignment = TextAnchor.MiddleCenter;
            textFieldStyle = new GUIStyle(HighLogic.Skin.textField);
            textFieldStyle.fixedWidth = 42;
            textFieldStyle.margin.bottom = 5;
            boxStyle = new GUIStyle(HighLogic.Skin.box);
            boxStyle.fixedHeight = 58;
        }
    }
}