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Unity 2D Parallax Effect script with Cinemachine
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| using UnityEngine; | |
| using Cinemachine; | |
| public class ParallaxEffect : MonoBehaviour | |
| { | |
| public Camera cam; | |
| public Transform subject; | |
| Vector2 startPosition; | |
| float startZ; | |
| Vector2 travel => (Vector2)cam.transform.position - startPosition; | |
| float distanceFromSubject => transform.position.z - subject.position.z; | |
| float clippingPlane => (cam.transform.position.z + (distanceFromSubject > 0 ? cam.farClipPlane : cam.nearClipPlane)); | |
| float parallaxFactor => Mathf.Abs(distanceFromSubject) / clippingPlane; | |
| public void Start() | |
| { | |
| startPosition = transform.position; | |
| startZ = transform.position.z; | |
| // Subscribe to the CameraUpdatedEvent | |
| CinemachineCore.CameraUpdatedEvent.AddListener(OnCameraUpdated); | |
| } | |
| private void OnDestroy() | |
| { | |
| CinemachineCore.CameraUpdatedEvent.RemoveListener(OnCameraUpdated); | |
| } | |
| // This will be called after the camera is positioned | |
| void OnCameraUpdated(CinemachineBrain brain) | |
| { | |
| // Update the parallax effect based on the camera position (only affecting the X position) | |
| float newPosX = startPosition.x + travel.x * parallaxFactor; | |
| // Keep the original Y position, so it doesn't move vertically | |
| transform.position = new Vector3(newPosX, transform.position.y, startZ); | |
| } | |
| } |
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