ui/Runtime/CreditsController.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using Sirenix.OdinInspector;
using KairoEngine.Core;
using KairoEngine.Core.GameActions;

namespace KairoEngine.UI
{
    [HideMonoScript]
    public class CreditsController : MonoBehaviour
    {
        public RectTransform textTransform;
        public bool rollCreditsOnStart = true;
        public bool listenForRestartEvent = true;
        public string restartEventName = "RestartRollingCredits";
        [BoxGroup("Rolling Credits")] public KeyCode cancelInput = KeyCode.Escape;
        [BoxGroup("Rolling Credits")] public KeyCode fastForwardInput = KeyCode.DownArrow;
        [BoxGroup("Rolling Credits")] public KeyCode revereInput = KeyCode.UpArrow;
        [BoxGroup("Rolling Credits")] public float normalSpeed = 10f;
        [BoxGroup("Rolling Credits")] public float speedTransitionTime = 0.5f;
        [BoxGroup("Rolling Credits")] public float fastForwardSpeed = 100f;
        [BoxGroup("Rolling Credits")] public float reverseSpeed = -100f;

        [BoxGroup("Actions"), InlineProperty, HideLabel] public GameActionContext context;
        [TabGroup("Actions/Tab", "OnStart"), InlineProperty, HideLabel] public GameActionsController OnStartAction;
        [TabGroup("Actions/Tab", "OnEnd"), InlineProperty, HideLabel] public GameActionsController OnEndAction;
        [TabGroup("Actions/Tab", "OnCancel"), InlineProperty, HideLabel] public GameActionsController OnCancelAction;
        
        private float speed = 0f;
        private float counter = 0f;
        private Vector2 size = new Vector2();
        private bool done = false;
        private bool running = false;
        private float desiredHeigth = 0f;

        
        
        private void Start()
        {
            Timer.ExecuteRealTime(100, () => {
                size = textTransform.sizeDelta;
                desiredHeigth = (size.y * 2) + 100 + (Screen.currentResolution.height * 2);
                if(listenForRestartEvent) GenericEvents.StartListening(restartEventName, StartRollingCredits);
                if(rollCreditsOnStart) StartRollingCredits();
            } ); 
        }

        private void OnDisable()
        {
            if(listenForRestartEvent) GenericEvents.StopListening(restartEventName, StartRollingCredits);
        }

        
        private void Update()
        {
            if(running) 
            {
                CancelRollingCredits();
                RollCredits();
            }
        }

        [Button("Restart"), ButtonGroup("Butttons")]
        public void StartRollingCredits()
        {
            Reset();
            running = true;
            if(OnStartAction.context == null) OnStartAction.context = context;
            OnStartAction.Restart();
            OnStartAction.Start();
        }

        [Button("Reset"), ButtonGroup("Butttons")]
        public void Reset ()
        {
            var pos = textTransform.position;
            size = textTransform.sizeDelta;
            pos.y =  Screen.currentResolution.height - Screen.currentResolution.height;
            textTransform.position = pos;
            counter = 0f;
            done = false;
            speed = normalSpeed;
        }

        private float t1, t2, t3;
        private void RollCredits()
        {
            if(done) return;
            if(Input.GetKey(fastForwardInput)) 
            {
                t1 += speedTransitionTime * Time.deltaTime;
                t2 -= speedTransitionTime * Time.deltaTime;
                t3 -= speedTransitionTime * Time.deltaTime;
                if(t1 > 1) t1 = 1;
                if(t2 < 0) t2 = 0;
                if(t3 < 0) t3 = 0;
                speed = Mathf.Lerp(speed, fastForwardSpeed, t1);
            }
            else if(Input.GetKey(revereInput))
            {
                t1 -= speedTransitionTime * Time.deltaTime;
                t2 += speedTransitionTime * Time.deltaTime;
                t3 -= speedTransitionTime * Time.deltaTime;
                if(t1 < 0) t1 = 0;
                if(t2 > 1) t2 = 1;
                if(t3 < 0) t3 = 0;
                speed = Mathf.Lerp(speed, reverseSpeed, t2);
            } 
            else
            {
                t1 -= speedTransitionTime * Time.deltaTime;
                t2 -= speedTransitionTime * Time.deltaTime;
                t3 += speedTransitionTime * Time.deltaTime;
                if(t1 < 0) t1 = 0;
                if(t2 < 0) t2 = 0;
                if(t3 > 1) t3 = 1;
                speed = Mathf.Lerp(speed, normalSpeed, t3);

            } 
            counter += Time.deltaTime;
            var pos = textTransform.position;
            pos.y += speed * Time.deltaTime;
            textTransform.position = pos;
            //Debug.Log($"{pos.y} > {desiredHeigth} ({pos.y > desiredHeigth})");
            if(pos.y > desiredHeigth) 
            {
                done = true;
                running = false;
                if(OnEndAction.context == null) OnEndAction.context = context;
                OnEndAction.Restart();
                OnEndAction.Start();
            }
        }

        private void CancelRollingCredits()
        {
            if(!running || done) return;
            if(Input.GetKeyDown(cancelInput)) 
            {
                done = true;
                running = false;
                if(OnCancelAction.context == null) OnCancelAction.context = context;
                OnCancelAction.Restart();
                OnCancelAction.Start();
            }
        }

        [OnInspectorInit]
        private void SetupInspector()
        {
            OnStartAction.context = this.context;
            OnEndAction.context = this.context;
        }
    }
}