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Assets/Scripts/ThirdParty/FirstPersonController/Utility/FOVKick.cs

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+using System;
+using System.Collections;
+using UnityEngine;
+
+namespace NBF
+{
+    [Serializable]
+    public class FOVKick
+    {
+        public Camera Camera;
+
+        [HideInInspector] public float originalFov;
+
+        public float FOVIncrease = 3f;
+
+        public float TimeToIncrease = 1f;
+
+        public float TimeToDecrease = 1f;
+
+        public AnimationCurve IncreaseCurve;
+
+        public void Setup(Camera camera)
+        {
+            CheckStatus(camera);
+            Camera = camera;
+            originalFov = camera.fieldOfView;
+        }
+
+        private void CheckStatus(Camera camera)
+        {
+            if (camera == null)
+            {
+                throw new Exception("FOVKick camera is null, please supply the camera to the constructor");
+            }
+
+            if (IncreaseCurve == null)
+            {
+                throw new Exception(
+                    "FOVKick Increase curve is null, please define the curve for the field of view kicks");
+            }
+        }
+
+        public void ChangeCamera(Camera camera)
+        {
+            Camera = camera;
+        }
+
+        public IEnumerator FOVKickUp()
+        {
+            float t = Mathf.Abs((Camera.fieldOfView - originalFov) / FOVIncrease);
+            while (t < TimeToIncrease)
+            {
+                Camera.fieldOfView = originalFov + IncreaseCurve.Evaluate(t / TimeToIncrease) * FOVIncrease;
+                t += Time.deltaTime;
+                yield return new WaitForEndOfFrame();
+            }
+        }
+
+        public IEnumerator FOVKickDown()
+        {
+            float t = Mathf.Abs((Camera.fieldOfView - originalFov) / FOVIncrease);
+            while (t > 0f)
+            {
+                Camera.fieldOfView = originalFov + IncreaseCurve.Evaluate(t / TimeToDecrease) * FOVIncrease;
+                t -= Time.deltaTime;
+                yield return new WaitForEndOfFrame();
+            }
+
+            Camera.fieldOfView = originalFov;
+        }
+    }
+}