GoakeFlax/Source/Game/Camera/CameraSpring.cs

using FlaxEngine;

namespace Game
{
    public class CameraSpring : Script
    {
        private bool lastGround;
        private Float3 lastPosition;
        public float percY;

        private Actor playerActor;
        private PlayerMovement playerMovement;

        public float speed = 240f;
        private Float3 targetOffset;
        private Actor viewModelHolder;

        public override void OnStart()
        {
            playerActor = Actor.Parent.Parent;
            playerMovement = playerActor.GetScript<PlayerMovement>();
            viewModelHolder = playerActor.GetChild("ViewModelHolder");

            lastGround = playerMovement.onGround;
            targetOffset = Actor.LocalPosition;
        }

        private void UpdatePosition(Float3 position)
        {
            Actor.Position = position;
            viewModelHolder.Position = position;
        }

        public override void OnUpdate()
        {
            Float3 position = Actor.Parent.Position + targetOffset;
            Float3 targetPosition = position;

            if (playerMovement.onGround)
            {
                float deltaY = position.Y - lastPosition.Y;
                //if (Mathf.Abs(deltaY) < 10f)
                if (deltaY > 0)
                {
                    if (deltaY > 100f)
                    {
                        // Teleported, snap instantly
                        UpdatePosition(position);
                    }
                    else
                    {
                        const float catchUpDistance = 10f;
                        const float catchUpMinMultip = 0.25f;
                        percY = Mathf.Abs(deltaY) / catchUpDistance;
                        percY = Mathf.Min(1.0f, percY + catchUpMinMultip);
                        percY *= percY;

                        float adjustSpeed = speed * Time.DeltaTime * percY;

                        position.Y = lastPosition.Y; //-= deltaY;
                        position.Y = Mathf.MoveTowards(position.Y, targetPosition.Y, adjustSpeed);
                        UpdatePosition(position);
                    }
                }
            }
            else
            {
                UpdatePosition(position);
            }

            lastPosition = position;
            lastGround = playerMovement.onGround;
        }
    }
}