주인공을 따라다니는 카메라

| 잡다한것들전부/공식예제 2014. 2. 25. 14:36

Posted by 히아레인

using UnityEngine;
using System.Collections;

public class CameraFollow : MonoBehaviour 
{
	public float xMargin = 1f;		// Distance in the x axis the player can move before the camera follows.
	public float yMargin = 1f;		// Distance in the y axis the player can move before the camera follows.
	public float xSmooth = 8f;		// How smoothly the camera catches up with it's target movement in the x axis.
	public float ySmooth = 8f;		// How smoothly the camera catches up with it'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's transform.

void Awake ()
	{
		// Setting up the reference.
		player = GameObject.FindGameObjectWithTag("Player").transform;
	}

bool CheckXMargin()
	{
		// Returns true if the distance between the camera and the player in the x axis is greater than the x margin.
		return Mathf.Abs(transform.position.x - player.position.x) > xMargin;
	}

bool CheckYMargin()
	{
		// Returns true if the distance between the camera and the player in the y axis is greater than the y margin.
		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's current x and y coordinates.
		float targetX = transform.position.x;
		float targetY = 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's current x position and the player's current x position.
			targetX = 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's current y position and the player's current y position.
			targetY = 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.
		targetX = Mathf.Clamp(targetX, minXAndY.x, maxXAndY.x);
		targetY = Mathf.Clamp(targetY, minXAndY.y, maxXAndY.y);

// Set the camera's position to the target position with the same z component.
		transform.position = new Vector3(targetX, targetY, transform.position.z);
	}
}

슈퍼마리오의 카메라 처럼 일정 거리에서는 카메라가 움직이지 않고 일정거리를 넘어갔을때만 카메라가 이동함.

// If the player has moved beyond the x margin...

if(CheckXMargin())

// ... the target x coordinate should be a Lerp between the camera's current x position and the player's current x position.

targetX = 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's current y position and the player's current y position.

targetY = Mathf.Lerp(transform.position.y, player.position.y, ySmooth * Time.deltaTime);

-> 마진 체크 후 카메라 이동

->Lerp 가 결국에는 targetY에 대입이 되며 targetY값은 계속 증가 결국 플레이어의 위치값과 똑같아짐

// The target x and y coordinates should not be larger than the maximum or smaller than the minimum.

targetX = Mathf.Clamp(targetX, minXAndY.x, maxXAndY.x);

targetY = Mathf.Clamp(targetY, minXAndY.y, maxXAndY.y);

// Set the camera's position to the target position with the same z component.

transform.position = new Vector3(targetX, targetY, transform.position.z);

-> 카메라 최대 거리 제한

결국엔 히어로의 값이랑 메인카메라랑 값이 똑같아 져야 되지만 카메라의 위치를 제한을 둬서 일정거리까지는 이동을 하지 못함

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