51 lines
1.8 KiB
C#
51 lines
1.8 KiB
C#
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using System.Collections;
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using System.Collections.Generic;
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using UnityEngine;
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public class Parallaxing : MonoBehaviour
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{
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private Transform _background;
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private float _parallaxScale;
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public float smoothing = 1f;
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private Transform _cam; // reference to the main cameras transform
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private Vector3 _previousCamPos; // the position of the camera in the previous frame
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// Is called before Start(). Great for references.
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void Awake () {
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// set up the camera reference
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_cam = Camera.main.transform;
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_background = transform;
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}
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// Start is called before the first frame update
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void Start()
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{
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// The previous frame had the current frame's camera position
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_previousCamPos = _cam.position;
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// asigning coresponding parallaxScale
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_parallaxScale = _background.position.z * -1;
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}
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// Update is called once per frame
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void Update()
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{
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// the parallax is the opposite of the camera movement because the previous frame multiplied by the scale
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float parallax = (_previousCamPos.x - _cam.position.x) * _parallaxScale;
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// set a target x position which is the current position plus the parallax
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var position = _background.position;
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float backgroundTargetPosX = position.x + parallax;
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// create a target position which is the background's current position with it's target x position
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Vector3 backgroundTargetPos = new Vector3(backgroundTargetPosX, position.y, position.z);
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// fade between current position and the target position using lerp
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position = Vector3.Lerp(position, backgroundTargetPos, smoothing * Time.deltaTime);
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_background.position = position;
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// set the previousCamPos to the camera's position at the end of the frame
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_previousCamPos = _cam.position;
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}
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}
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