CODEWITHSUNDEEP
c#unity-game-enginegame-development
Newboy11
Newboy11

Reputation: 3136

Scale unity game screen based on mobile device screen

My game is on 2D landscape format and I wanted to scale my game screen size based on mobile device screen. I tried different code but to no avail. This is the first script I tried

[ExecuteInEditMode]
[RequireComponent(typeof(Camera))]

public class MatchWidth : MonoBehaviour 
{
    public float sceneWidth = 25;

    Camera _camera;
    void Start() 
    {
        _camera = GetComponent<Camera>();
    }

    void Update() 
    {
        float unitsPerPixel = sceneWidth / Screen.width;

        float desiredHalfHeight = 0.5f * unitsPerPixel * Screen.height;

        camera.orthographicSize = desiredHalfHeight;
    }
}

and the other script I tried

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class ChangeScreenSizeBasedonDevice : MonoBehaviour
{
    // Use this for initialization
    public float screenHeight = 1920f;
    public float screenWidth = 1080f;
    public float targetAspect = 9f / 16f;
    public float orthographicSize;
    private Camera mainCamera;


    void Start()
    {

        mainCamera = Camera.main;
        orthographicSize = mainCamera.orthographicSize;

        float orthoWidth = orthographicSize / screenHeight * screenWidth;
        orthoWidth = orthoWidth / (targetAspect / mainCamera.aspect);
        Camera.main.orthographicSize = (orthoWidth / Screen.width * Screen.height);
    }
}

The first one has a problem with its height it has a space on top and bottom and the second one zoom in too much. Can someone point where did i go wrong or who has a better code. I placed the both script on Main Camera

UPDATE I tried also Saif says in this link https://gamedev.stackexchange.com/questions/79546/how-do-you-handle-aspect-ratio-differences-with-unity-2d but the result is still the same as script 1. here is the pic:

enter image description here

What do I need to remove the space or margin at top or bottom

UPDATE 2

Solve the margin issue using this 

void Start()
{
    float screenWidth = GameManager.Instance.getScreenWidth();
    float screenHeight = GameManager.Instance.getScreenHeight();

    if (gameObject.name == "Cube")
    {
        transform.localScale = new Vector3(screenWidth / 4, screenHeight, -1);
        transform.position = new Vector3(transform.position.x, 0, transform.position.z);
    }
}

attached to gameobject to fit screen

Upvotes: 1

Views: 11932

Answers (1)

FaTaLL
FaTaLL

Reputation: 511

Your Camera's projection probably is Orthographic. I'll give you an easy solution to this.

using UnityEngine;

public class ScreenManager : MonoBehaviour
{
    static public ScreenManager SM { get; set; }

    private void Awake()
    {
        SM = this;
    }

    public float getScreenHeight()
    {
        return Camera.main.orthographicSize * 2.0f;

    }
    public float getScreenWidth()
    {
        return getScreenHeight() * Screen.width / Screen.height;
    }

}

You can call these two functions anywhere after you put this script to a gameobject.

Example

For example;

Lets say you want a gameobject to be half size of the screen height and place on the middle-left of the screen. (And lets set its width to 4/screen width size)

public GameObject AnObject;



 void Start()
    {
      AnObject.transform.localScale = new Vector2(ScreenManager.SM.getScreenWidth()/4,
 ScreenManager.SM.getScreenHeight() / 2);

     AnObject.transform.position = new vector2(-ScreenManager.SM.getScreenWidth()/2,0);
    }

Note: If you want scaling to work perfectly, you have to set image pixel per unit in import settings correctly. For example, if an image is 1024x1024, you want to set your pixel per unit for that image to 1024.

Example2

Upvotes: 2

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