[Unity2D]实现背景的移动

using UnityEngine;
using System.Collections;public class CameraController : MonoBehaviour
{public PlayerStateController.playerStates currentPlayerState &＃61; PlayerStateController.playerStates.idle;public GameObject playerObject &＃61; null;//玩家游戏对象public float cameraTrackingSpeed &＃61; 0.2f;private Vector3 lastTargetPosition &＃61; Vector3.zero;//玩家最后的位置private Vector3 currTargetPosition &＃61; Vector3.zero;//玩家当前的位置private float currLerpDistance &＃61; 0.0f;void Start(){Vector3 playerPos &＃61; playerObject.transform.position;//玩家的位置Vector3 cameraPos &＃61; transform.position;//相机的位置Vector3 startTargPos &＃61; playerPos;//玩家初始化位置
startTargPos.z &＃61; cameraPos.z;lastTargetPosition &＃61; startTargPos;currTargetPosition &＃61; startTargPos;currLerpDistance &＃61; 1.0f;}void OnEnable(){PlayerStateController.onStateChange &＃43;&＃61; onPlayerStateChange;}void OnDisable(){PlayerStateController.onStateChange -&＃61; onPlayerStateChange;}void onPlayerStateChange(PlayerStateController.playerStates newState){currentPlayerState &＃61; newState;}void LateUpdate(){onStateCycle();currLerpDistance &＃43;&＃61; cameraTrackingSpeed;// 取两个向量之间的值transform.position &＃61; Vector3.Lerp(lastTargetPosition, currTargetPosition, currLerpDistance);}void onStateCycle(){switch (currentPlayerState){case PlayerStateController.playerStates.idle:trackPlayer();break;case PlayerStateController.playerStates.left:trackPlayer();break;case PlayerStateController.playerStates.right:trackPlayer();break;case PlayerStateController.playerStates.jump:trackPlayer();break;case PlayerStateController.playerStates.firingWeapon:trackPlayer();break;}}void trackPlayer(){Vector3 currCamPos &＃61; transform.position;//当前相机位置Vector3 currPlayerPos &＃61; playerObject.transform.position;//当前玩家位置if (currCamPos.x &＃61;&＃61; currPlayerPos.x && currCamPos.y &＃61;&＃61; currPlayerPos.y)//位置一样&＃xff0c;不移动
{currLerpDistance &＃61; 1.0f;lastTargetPosition &＃61; currCamPos;currTargetPosition &＃61; currCamPos;return;}currLerpDistance &＃61; 0.0f;lastTargetPosition &＃61; currCamPos;//最后的位置为相机的位置
currTargetPosition &＃61; currPlayerPos;//当前的位置为玩家的位置
currTargetPosition.z &＃61; currCamPos.z;}void stopTrackingPlayer(){Vector3 currCamPos &＃61; transform.position;currTargetPosition &＃61; currCamPos;lastTargetPosition &＃61; currCamPos;currLerpDistance &＃61; 1.0f;}
}

using UnityEngine;
using System.Collections;public class ParallaxController : MonoBehaviour
{public GameObject[] clouds;//云层public GameObject[] nearHills;//近山public GameObject[] farHills;//远山public GameObject[] lava;//地面// 移动的速度public float cloudLayerSpeedModifier;public float nearHillLayerSpeedModifier;public float farHillLayerSpeedModifier;public float lavalLayerSpeedModifier;public Camera myCamera;private Vector3 lastCamPos;void Start(){lastCamPos &＃61; myCamera.transform.position;//获取相机的位置
}void Update(){Vector3 currCamPos &＃61; myCamera.transform.position;float xPosDiff &＃61; lastCamPos.x - currCamPos.x;//计算相机x轴的变化
adjustParallaxPositionsForArray(clouds, cloudLayerSpeedModifier, xPosDiff);adjustParallaxPositionsForArray(nearHills, nearHillLayerSpeedModifier, xPosDiff);adjustParallaxPositionsForArray(farHills, farHillLayerSpeedModifier, xPosDiff);adjustParallaxPositionsForArray(lava, lavalLayerSpeedModifier, xPosDiff);lastCamPos &＃61; myCamera.transform.position;}// 数组来存储游戏对象void adjustParallaxPositionsForArray(GameObject[] layerArray, float layerSpeedModifier, float xPosDiff){// 遍历改变精灵的位置for (int i &＃61; 0; i ){Vector3 objPos &＃61; layerArray[i].transform.position;objPos.x &＃43;&＃61; xPosDiff * layerSpeedModifier;layerArray[i].transform.position &＃61; objPos;}}
}

using UnityEngine;
using System.Collections;public class CameraFollow : MonoBehaviour
{public float xMargin &＃61; 1f; // Distance in the x axis the player can move before the camera follows.public float yMargin &＃61; 1f; // Distance in the y axis the player can move before the camera follows.public float xSmooth &＃61; 8f; // How smoothly the camera catches up with it&＃39;s target movement in the x axis.public float ySmooth &＃61; 8f; // How smoothly the camera catches up with it&＃39;s target movement in the y axis.public Vector2 maxXAndY; // The maximum x and y coordinates the camera can have.public Vector2 minXAndY; // The minimum x and y coordinates the camera can have.private Transform player; // Reference to the player&＃39;s transform.void Awake (){// Setting up the reference.// 查找玩家游戏对象player &＃61; GameObject.FindGameObjectWithTag("Player").transform;}// 检查边缘bool CheckXMargin(){// Returns true if the distance between the camera and the player in the x axis is greater than the x margin.// x轴变化的绝对值大于设定值return Mathf.Abs(transform.position.x - player.position.x) > xMargin;}// 检查边缘bool CheckYMargin(){// Returns true if the distance between the camera and the player in the y axis is greater than the y margin.// y轴变化的绝对值大于设定值return Mathf.Abs(transform.position.y - player.position.y) > yMargin;}void FixedUpdate (){TrackPlayer();}void TrackPlayer (){// By default the target x and y coordinates of the camera are it&＃39;s current x and y coordinates.float targetX &＃61; transform.position.x;float targetY &＃61; transform.position.y;// If the player has moved beyond the x margin...if(CheckXMargin())// ... the target x coordinate should be a Lerp between the camera&＃39;s current x position and the player&＃39;s current x position.// 在当前位置和最新位置之间插值// Time.deltaTime 增量时间 以秒计算&＃xff0c;完成最后一帧的时间&＃xff08;只读&＃xff09;。使用这个函数使和你的游戏帧速率无关targetX &＃61; Mathf.Lerp(transform.position.x, player.position.x, xSmooth * Time.deltaTime);// If the player has moved beyond the y margin...if(CheckYMargin())// ... the target y coordinate should be a Lerp between the camera&＃39;s current y position and the player&＃39;s current y position.targetY &＃61; Mathf.Lerp(transform.position.y, player.position.y, ySmooth * Time.deltaTime);// The target x and y coordinates should not be larger than the maximum or smaller than the minimum.// 把目标值限制在固定的范围targetX &＃61; Mathf.Clamp(targetX, minXAndY.x, maxXAndY.x);targetY &＃61; Mathf.Clamp(targetY, minXAndY.y, maxXAndY.y);// Set the camera&＃39;s position to the target position with the same z component.// 设置相机的位置transform.position &＃61; new Vector3(targetX, targetY, transform.position.z);}
}