How to make a smash bros-like camera

Question

I have been making a multiplayer game with the camera focusing on everyone on the screen. Just like smash bros, the camera focuses on the center of all of the characters positions while zooming to keep the players viewable.

My only problem is the zooming with an orthographic camera. So, is there anyone who knows how to zoom the camera to keep the players in view?
(Sample Code would be nice)

Answer 1

Best Answer

Answer by Kalbytron · Mar 17, 2014 at 08:23 PM

Sorry about me taking a while to say thanks for the help. I'm just going to post this for everyone to view.

Thanks to CodinRonin and alucardj.

// Update is called once per frame void Update() {

CalculateBounds();

CalculateCameraPosAndSize();

}

void CalculateBounds() { minX = Mathf.Infinity; maxX = -Mathf.Infinity; minY = Mathf.Infinity; maxY = -Mathf.Infinity;

 players = GameObject.FindGameObjectsWithTag("Player");

 foreach (GameObject player in players){

    Vector3 tempPlayer = player.transform.position;

    //X Bounds
    if (tempPlayer.x < minX)
      minX = tempPlayer.x;

    if (tempPlayer.x > maxX)
      maxX = tempPlayer.x;

    //Y Bounds
    if (tempPlayer.y < minY)
      minY = tempPlayer.y;

    if (tempPlayer.y > maxY)
      maxY = tempPlayer.y;
 }

}

void CalculateCameraPosAndSize() { //Position Vector3 cameraCenter = Vector3.zero;

 foreach(GameObject player in players){
    cameraCenter += player.transform.position;
 }

 Vector3 finalCameraCenter = cameraCenter / players.Length;

 //Rotates and Positions camera around a point
 rot = Quaternion.Euler(angles);
 pos = rot * new Vector3(0f, 0f, -camDist) + finalCameraCenter; 

 transform.rotation = rot;
 transform.position = Vector3.Lerp(transform.position, pos, camSpeed * Time.deltaTime);

 finalLookAt = Vector3.Lerp (finalLookAt, finalCameraCenter, camSpeed * Time.deltaTime);

 transform.LookAt(finalLookAt);

 //Size
 float sizeX = maxX - minX + cameraBuffer.x;
 float sizeY = maxY - minY + cameraBuffer.y;

 camSize = (sizeX > sizeY ? sizeX : sizeY);

 camera.orthographicSize = camSize * 0.5f;

}

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GaborV · Mar 08, 2016 at 12:26 AM 0

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I know this is a little bit old, but now I want to have this kind of camera in my game. I tried this code but it's not okay: Camera movement How to solve this? Did you found a good solution?

hongdeyuteo · Jan 01, 2021 at 04:42 PM 0

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i made a similar camera system until i tried removing and adding the targets into the list when the players died. Adding the targets back to the array were very challenging and i could not find a way to do so as List.Add() does not work if the element is 0. i tried List.insert but it still didn;t work. it's like 4 am now and im gonna go nuts soon pls help :(((( thanks in advance!

Spip5 hongdeyuteo · Jan 02, 2021 at 02:38 PM 0

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Have a look at this, this is from brackeys channel (they used to do really nice tuorials) : https://www.youtube.com/watch?v=aLpixrPvlB8

Answer 2

@GaborV unity 5 answer using a perspective cam

 using System.Collections.Generic;
 using UnityEngine;
 using System.Linq;
 
 namespace Assets.Scripts.Player
 {
     public class PlayerCam : MonoBehaviour
     {
         private new Transform transform;
         private Vector3 DesiredPos;
         public List<Transform> Players;
         public float camSpeed;
         private Camera cam;
         void Awake()
         {
             transform = GetComponent<Transform>();
             cam = GetComponent<Camera>();            
         }
 
         private void Start()
         {
             var p = GameObject.FindGameObjectsWithTag("Player");
             Players = new List<Transform>();
             for (int i = 0; i < p.Length; i++)
             {
                 Players.Add(p[i].GetComponent<Transform>());
             }
         }
 
         void Update()
         {
             if (Players.Count <= 0)//early out if no players have been found
                 return;
             DesiredPos = Vector3.zero;
             float distance = 0f;
             var hSort = Players.OrderByDescending(p => p.position.y);
             var wSort = Players.OrderByDescending(p => p.position.x);
             var mHeight = hSort.First().position.y - hSort.Last().position.y;
             var mWidth = wSort.First().position.x - wSort.Last().position.x;
             var distanceH = -(mHeight + 5f) * 0.5f / Mathf.Tan(cam.fieldOfView * 0.5f * Mathf.Deg2Rad);
             var distanceW = -(mWidth / cam.aspect + 5f) * 0.5f / Mathf.Tan(cam.fieldOfView * 0.5f * Mathf.Deg2Rad);
             distance = distanceH < distanceW ? distanceH : distanceW;
 
             for (int i = 0; i < Players.Count; i++)
             {
                 DesiredPos += Players[i].position;
             }
             if (distance > -10f) distance = -10f;
             DesiredPos /= Players.Count;
             DesiredPos.z = distance;
         }
 
         void LateUpdate()
         {
             transform.position = Vector3.MoveTowards(transform.position, DesiredPos, camSpeed);
         }
     }
 }

Answer 3

Answer by CodeElemental · Feb 20, 2014 at 08:14 PM

You can zoom the orthographic camera by adjusting it's orthographic size . As for the positions , you can iterate through the positions of all the players and get the Rect in which they are all displayed (the topmost and lowest y , the leftmost and rightmost x ) , and center the camera to look at that rect.

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How to make a smash bros-like camera

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